Merge branch 'develop-2.x' of https://github.com/RocketChat/Rocket.Chat.Android into develop-2.x

app/build.gradle

@@ -12,8 +12,8 @@ android {
         applicationId "chat.rocket.android"
         minSdkVersion 21
         targetSdkVersion versions.targetSdk
-        versionCode 1008
-        versionName "2.0.0-dev6"
+        versionCode 1009
+        versionName "2.0.0-dev7"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         multiDexEnabled true
     }
@@ -105,8 +105,6 @@ dependencies {
 
     implementation libraries.aVLoadingIndicatorView
 
-    implementation libraries.swipeBackLayout
-
     implementation('com.crashlytics.sdk.android:crashlytics:2.6.8@aar') {
         transitive = true
     }

app/gradle/wrapper/gradle-wrapper.properties

+#Thu Feb 15 15:50:42 BRST 2018
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

app/gradlew

+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

app/gradlew.bat

+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

app/src/main/AndroidManifest.xml

@@ -37,18 +37,22 @@
 
         <activity
             android:name=".main.ui.MainActivity"
+            android:windowSoftInputMode="adjustResize|stateAlwaysHidden"
             android:theme="@style/AppTheme" />
 
         <activity
             android:name=".webview.WebViewActivity"
+            android:windowSoftInputMode="adjustResize|stateAlwaysHidden"
             android:theme="@style/AppTheme" />
 
         <activity
             android:name=".chatroom.ui.ChatRoomActivity"
+            android:windowSoftInputMode="adjustResize|stateAlwaysHidden"
             android:theme="@style/AppTheme" />
 
         <activity
             android:name=".chatroom.ui.PinnedMessagesActivity"
+            android:windowSoftInputMode="adjustResize|stateAlwaysHidden"
             android:theme="@style/AppTheme" />
 
         <activity

app/src/main/java/chat/rocket/android/app/RocketChatApplication.kt

@@ -9,6 +9,7 @@ import chat.rocket.android.helper.CrashlyticsTree
 import chat.rocket.android.server.domain.GetCurrentServerInteractor
 import chat.rocket.android.server.domain.MultiServerTokenRepository
 import chat.rocket.android.server.domain.SettingsRepository
+import chat.rocket.android.widget.emoji.EmojiRepository
 import chat.rocket.common.model.Token
 import chat.rocket.core.TokenRepository
 import com.crashlytics.android.Crashlytics
@@ -57,6 +58,7 @@ class RocketChatApplication : Application(), HasActivityInjector, HasServiceInje
         initCurrentServer()
 
         AndroidThreeTen.init(this)
+        EmojiRepository.load(this)
 
         setupCrashlytics()
         setupFresco()

app/src/main/java/chat/rocket/android/chatroom/adapter/AudioAttachmentViewHolder.kt

+package chat.rocket.android.chatroom.adapter
+
+import android.view.View
+import chat.rocket.android.chatroom.viewmodel.AudioAttachmentViewModel
+import chat.rocket.android.player.PlayerActivity
+import chat.rocket.android.util.extensions.setVisible
+import kotlinx.android.synthetic.main.message_attachment.view.*
+
+class AudioAttachmentViewHolder(itemView: View) : BaseViewHolder<AudioAttachmentViewModel>(itemView) {
+    init {
+        with(itemView) {
+            image_attachment.setVisible(false)
+            audio_video_attachment.setVisible(true)
+        }
+    }
+
+    override fun bindViews(data: AudioAttachmentViewModel) {
+        with(itemView) {
+            file_name.text = data.attachmentTitle
+            audio_video_attachment.setOnClickListener { view ->
+                data.attachmentUrl.let { url ->
+                    PlayerActivity.play(view.context, url)
+                }
+            }
+        }
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/adapter/BaseViewHolder.kt

+package chat.rocket.android.chatroom.adapter
+
+import android.support.v7.widget.RecyclerView
+import android.view.View
+
+abstract class BaseViewHolder<T>(itemView: View) : RecyclerView.ViewHolder(itemView) {
+    var data: T? = null
+
+    fun bind(data: T) {
+        this.data = data
+        bindViews(data)
+    }
+
+    abstract fun bindViews(data: T)
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/adapter/ChatRoomAdapter.kt

+package chat.rocket.android.chatroom.adapter
+
+import android.support.v7.widget.RecyclerView
+import android.view.ViewGroup
+import chat.rocket.android.R
+import chat.rocket.android.chatroom.presentation.ChatRoomPresenter
+import chat.rocket.android.chatroom.viewmodel.*
+import chat.rocket.android.util.extensions.inflate
+import timber.log.Timber
+import java.security.InvalidParameterException
+
+class ChatRoomAdapter(
+    private val roomType: String,
+    private val roomName: String,
+    private val presenter: ChatRoomPresenter?,
+    private val enableActions: Boolean = true
+) : RecyclerView.Adapter<BaseViewHolder<*>>() {
+
+    private val dataSet = ArrayList<BaseViewModel<*>>()
+
+    init {
+        setHasStableIds(true)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BaseViewHolder<*> {
+        return when(viewType.toViewType()) {
+            BaseViewModel.ViewType.MESSAGE -> {
+                val view = parent.inflate(R.layout.item_message)
+                MessageViewHolder(view, roomName, roomType, presenter, enableActions)
+            }
+            BaseViewModel.ViewType.IMAGE_ATTACHMENT -> {
+                val view = parent.inflate(R.layout.message_attachment)
+                ImageAttachmentViewHolder(view)
+            }
+            BaseViewModel.ViewType.AUDIO_ATTACHMENT -> {
+                val view = parent.inflate(R.layout.message_attachment)
+                AudioAttachmentViewHolder(view)
+            }
+            BaseViewModel.ViewType.VIDEO_ATTACHMENT -> {
+                val view = parent.inflate(R.layout.message_attachment)
+                VideoAttachmentViewHolder(view)
+            }
+            BaseViewModel.ViewType.URL_PREVIEW -> {
+                val view = parent.inflate(R.layout.message_url_preview)
+                UrlPreviewViewHolder(view)
+            }
+            else -> {
+                throw InvalidParameterException("TODO - implement for ${viewType.toViewType()}")
+            }
+        }
+    }
+
+    override fun getItemViewType(position: Int): Int {
+        return dataSet[position].viewType
+    }
+
+    override fun getItemCount(): Int {
+        return dataSet.size
+    }
+
+    override fun onBindViewHolder(holder: BaseViewHolder<*>, position: Int) {
+        when (holder) {
+            is MessageViewHolder -> holder.bind(dataSet[position] as MessageViewModel)
+            is ImageAttachmentViewHolder -> holder.bind(dataSet[position] as ImageAttachmentViewModel)
+            is AudioAttachmentViewHolder -> holder.bind(dataSet[position] as AudioAttachmentViewModel)
+            is VideoAttachmentViewHolder -> holder.bind(dataSet[position] as VideoAttachmentViewModel)
+            is UrlPreviewViewHolder -> holder.bind(dataSet[position] as UrlPreviewViewModel)
+        }
+    }
+
+    override fun getItemId(position: Int): Long {
+        val model = dataSet[position]
+        return when (model) {
+            is MessageViewModel -> model.messageId.hashCode().toLong()
+            is BaseFileAttachmentViewModel -> model.id
+            else -> return position.toLong()
+        }
+    }
+
+    fun appendData(dataSet: List<BaseViewModel<*>>) {
+        val previousDataSetSize = this.dataSet.size
+        this.dataSet.addAll(dataSet)
+        notifyItemChanged(previousDataSetSize, dataSet.size)
+    }
+
+    fun prependData(dataSet: List<BaseViewModel<*>>) {
+        this.dataSet.addAll(0, dataSet)
+        notifyItemRangeInserted(0, dataSet.size)
+    }
+
+    fun updateItem(message: BaseViewModel<*>) {
+        val index = dataSet.indexOfLast { it.messageId == message.messageId }
+        Timber.d("index: $index")
+        if (index > -1) {
+            dataSet[index] = message
+            notifyItemChanged(index)
+        }
+    }
+
+    fun removeItem(messageId: String) {
+        val index = dataSet.indexOfFirst { it.messageId == messageId }
+        if (index > -1) {
+            val oldSize = dataSet.size
+            val newSet = dataSet.filterNot { it.messageId == messageId }
+            dataSet.clear()
+            dataSet.addAll(newSet)
+            val newSize = dataSet.size
+            notifyItemRangeRemoved(index, oldSize - newSize)
+        }
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/adapter/ImageAttachmentViewHolder.kt

+package chat.rocket.android.chatroom.adapter
+
+import android.view.View
+import chat.rocket.android.chatroom.viewmodel.ImageAttachmentViewModel
+import com.stfalcon.frescoimageviewer.ImageViewer
+import kotlinx.android.synthetic.main.message_attachment.view.*
+
+class ImageAttachmentViewHolder(itemView: View) : BaseViewHolder<ImageAttachmentViewModel>(itemView) {
+    override fun bindViews(data: ImageAttachmentViewModel) {
+        with(itemView) {
+            image_attachment.setImageURI(data.attachmentUrl)
+            file_name.text = data.attachmentTitle
+            image_attachment.setOnClickListener { view ->
+                // TODO - implement a proper image viewer with a proper Transition
+                ImageViewer.Builder(view.context, listOf(data.attachmentUrl))
+                        .setStartPosition(0)
+                        .show()
+            }
+        }
+    }
+
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/adapter/MessageViewHolder.kt

+package chat.rocket.android.chatroom.adapter
+
+import android.text.method.LinkMovementMethod
+import android.view.MenuItem
+import android.view.View
+import chat.rocket.android.R
+import chat.rocket.android.chatroom.presentation.ChatRoomPresenter
+import chat.rocket.android.chatroom.ui.bottomsheet.BottomSheetMenu
+import chat.rocket.android.chatroom.ui.bottomsheet.adapter.ActionListAdapter
+import chat.rocket.android.chatroom.viewmodel.MessageViewModel
+import kotlinx.android.synthetic.main.avatar.view.*
+import kotlinx.android.synthetic.main.item_message.view.*
+import ru.whalemare.sheetmenu.extension.inflate
+import ru.whalemare.sheetmenu.extension.toList
+
+class MessageViewHolder(
+    itemView: View,
+    private val roomType: String,
+    private val roomName: String,
+    private val presenter: ChatRoomPresenter?,
+    enableActions: Boolean
+) : BaseViewHolder<MessageViewModel>(itemView),
+    MenuItem.OnMenuItemClickListener {
+
+    init {
+        itemView.text_content.movementMethod = LinkMovementMethod()
+
+        if (enableActions) {
+            itemView.setOnLongClickListener {
+                if (data?.isSystemMessage == false) {
+                    val menuItems = it.context.inflate(R.menu.message_actions).toList()
+                    menuItems.find { it.itemId == R.id.action_menu_msg_pin_unpin }?.apply {
+                        val isPinned = data?.isPinned ?: false
+                        setTitle(if (isPinned) R.string.action_msg_unpin else R.string.action_msg_pin)
+                        isChecked = isPinned
+                    }
+                    val adapter = ActionListAdapter(menuItems, this@MessageViewHolder)
+                    BottomSheetMenu(adapter).apply {
+
+                    }.show(it.context)
+                }
+                true
+            }
+        }
+    }
+
+    override fun bindViews(data: MessageViewModel) {
+        with(itemView) {
+            text_message_time.text = data.time
+            text_sender.text = data.senderName
+            text_content.text = data.content
+            image_avatar.setImageURI(data.avatar)
+        }
+    }
+
+    override fun onMenuItemClick(item: MenuItem): Boolean {
+        data?.rawData?.apply {
+            when (item.itemId) {
+                R.id.action_menu_msg_delete -> presenter?.deleteMessage(roomId, id)
+                R.id.action_menu_msg_quote -> presenter?.citeMessage(roomType, roomName, id, false)
+                R.id.action_menu_msg_reply -> presenter?.citeMessage(roomType, roomName, id, true)
+                R.id.action_menu_msg_copy -> presenter?.copyMessage(id)
+                R.id.action_menu_msg_edit -> presenter?.editMessage(roomId, id, message)
+                R.id.action_menu_msg_pin_unpin -> {
+                    with(item) {
+                        if (!isChecked) {
+                            presenter?.pinMessage(id)
+                        } else {
+                            presenter?.unpinMessage(id)
+                        }
+                    }
+                }
+                else -> TODO("Not implemented")
+            }
+        }
+        return true
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/adapter/UrlPreviewViewHolder.kt

+package chat.rocket.android.chatroom.adapter
+
+import android.content.Intent
+import android.net.Uri
+import android.view.View
+import chat.rocket.android.chatroom.viewmodel.UrlPreviewViewModel
+import chat.rocket.android.util.extensions.content
+import chat.rocket.android.util.extensions.setVisible
+import kotlinx.android.synthetic.main.message_url_preview.view.*
+
+class UrlPreviewViewHolder(itemView: View) : BaseViewHolder<UrlPreviewViewModel>(itemView) {
+    override fun bindViews(data: UrlPreviewViewModel) {
+        with(itemView) {
+            if (data.thumbUrl.isNullOrEmpty()) {
+                image_preview.setVisible(false)
+            } else {
+                image_preview.setImageURI(data.thumbUrl)
+                image_preview.setVisible(true)
+            }
+            text_host.content = data.hostname
+            text_title.content = data.title
+            text_description.content = data.description ?: ""
+
+            url_preview_layout.setOnClickListener { view ->
+                view.context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(data.rawData.url)))
+            }
+        }
+    }
+
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/adapter/VideoAttachmentViewHolder.kt

+package chat.rocket.android.chatroom.adapter
+
+import android.view.View
+import chat.rocket.android.chatroom.viewmodel.VideoAttachmentViewModel
+import chat.rocket.android.player.PlayerActivity
+import chat.rocket.android.util.extensions.setVisible
+import kotlinx.android.synthetic.main.message_attachment.view.*
+
+class VideoAttachmentViewHolder(itemView: View) : BaseViewHolder<VideoAttachmentViewModel>(itemView) {
+    init {
+        with(itemView) {
+            image_attachment.setVisible(false)
+            audio_video_attachment.setVisible(true)
+        }
+    }
+
+    override fun bindViews(data: VideoAttachmentViewModel) {
+        with(itemView) {
+            file_name.text = data.attachmentTitle
+            audio_video_attachment.setOnClickListener { view ->
+                data.attachmentUrl.let { url ->
+                    PlayerActivity.play(view.context, url)
+                }
+            }
+        }
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/presentation/ChatRoomPresenter.kt

@@ -3,7 +3,7 @@ package chat.rocket.android.chatroom.presentation
 import android.net.Uri
 import chat.rocket.android.R
 import chat.rocket.android.chatroom.domain.UriInteractor
-import chat.rocket.android.chatroom.viewmodel.MessageViewModelMapper
+import chat.rocket.android.chatroom.viewmodel.ViewModelMapper
 import chat.rocket.android.core.lifecycle.CancelStrategy
 import chat.rocket.android.server.domain.*
 import chat.rocket.android.server.infraestructure.RocketChatClientFactory
@@ -34,7 +34,7 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
                                             private val uriInteractor: UriInteractor,
                                             private val messagesRepository: MessagesRepository,
                                             factory: RocketChatClientFactory,
-                                            private val mapper: MessageViewModelMapper) {
+                                            private val mapper: ViewModelMapper) {
     private val client = factory.create(serverInteractor.get()!!)
     private var subId: String? = null
     private var settings: Map<String, Value<Any>> = getSettingsInteractor.get(serverInteractor.get()!!)!!
@@ -48,7 +48,11 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
                         client.messages(chatRoomId, roomTypeOf(chatRoomType), offset, 30).result
                 messagesRepository.saveAll(messages)
 
-                val messagesViewModels = mapper.mapToViewModelList(messages, settings)
+                // TODO: For now we are marking the room as read if we can get the messages (I mean, no exception occurs)
+                // but should mark only when the user see the first unread message.
+                markRoomAsRead(chatRoomId)
+              
+                val messagesViewModels = mapper.map(messages)
                 view.showMessages(messagesViewModels)
 
                 // Subscribe after getting the first page of messages from REST
@@ -127,6 +131,17 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
         }
     }
 
+    fun markRoomAsRead(roomId: String) {
+        launchUI(strategy) {
+            try {
+                client.markAsRead(roomId)
+            } catch (ex: RocketChatException) {
+                view.showMessage(ex.message!!) // TODO Remove.
+                Timber.e(ex) // FIXME: Right now we are only catching the exception with Timber.
+            }
+        }
+    }
+
     private fun subscribeMessages(roomId: String) {
         client.addStateChannel(stateChannel)
         launch(CommonPool + strategy.jobs) {
@@ -232,9 +247,9 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
                     is RoomType.Custom -> "custom" //TODO: put appropriate callback string here.
                 }
                 view.showReplyingAction(
-                    user,
-                    "[ ](${serverUrl}/${room}/${roomName}?msg=${id}) ${mention} ",
-                    m.message
+                        username = user,
+                        replyMarkdown = "[ ]($serverUrl/$room/$roomName?msg=$id) $mention ",
+                        quotedMessage = m.message
                 )
             }
         }
@@ -315,7 +330,7 @@ class ChatRoomPresenter @Inject constructor(private val view: ChatRoomView,
 
     private fun updateMessage(streamedMessage: Message) {
         launchUI(strategy) {
-            val viewModelStreamedMessage = mapper.mapToViewModel(streamedMessage, settings)
+            val viewModelStreamedMessage = mapper.map(streamedMessage)
             val roomMessages = messagesRepository.getByRoomId(streamedMessage.roomId)
             val index = roomMessages.indexOfFirst { msg -> msg.id == streamedMessage.id }
             if (index > -1) {

app/src/main/java/chat/rocket/android/chatroom/presentation/ChatRoomView.kt

 package chat.rocket.android.chatroom.presentation
 
 import android.net.Uri
-import chat.rocket.android.chatroom.viewmodel.MessageViewModel
+import chat.rocket.android.chatroom.viewmodel.BaseViewModel
 import chat.rocket.android.core.behaviours.LoadingView
 import chat.rocket.android.core.behaviours.MessageView
 
@@ -12,7 +12,7 @@ interface ChatRoomView : LoadingView, MessageView {
      *
      * @param dataSet The data set to show.
      */
-    fun showMessages(dataSet: List<MessageViewModel>)
+    fun showMessages(dataSet: List<BaseViewModel<*>>)
 
     /**
      * Send a message to a chat room.
@@ -43,7 +43,7 @@ interface ChatRoomView : LoadingView, MessageView {
      *
      * @param message The (recent) message sent to a chat room.
      */
-    fun showNewMessage(message: MessageViewModel)
+    fun showNewMessage(message: List<BaseViewModel<*>>)
 
     /**
      * Dispatch to the recycler views adapter that we should remove a message.
@@ -57,7 +57,7 @@ interface ChatRoomView : LoadingView, MessageView {
      *
      * @param index The index of the changed message
      */
-    fun dispatchUpdateMessage(index: Int, message: MessageViewModel)
+    fun dispatchUpdateMessage(index: Int, message: List<BaseViewModel<*>>)
 
     /**
      * Show reply status above the message composer.

app/src/main/java/chat/rocket/android/chatroom/presentation/PinnedMessagesPresenter.kt

 package chat.rocket.android.chatroom.presentation
 
-import chat.rocket.android.chatroom.viewmodel.MessageViewModelMapper
+import chat.rocket.android.chatroom.viewmodel.MessageViewModel
+import chat.rocket.android.chatroom.viewmodel.ViewModelMapper
 import chat.rocket.android.core.lifecycle.CancelStrategy
 import chat.rocket.android.server.domain.GetChatRoomsInteractor
 import chat.rocket.android.server.domain.GetCurrentServerInteractor
@@ -18,7 +19,7 @@ class PinnedMessagesPresenter @Inject constructor(private val view: PinnedMessag
                                                   private val strategy: CancelStrategy,
                                                   private val serverInteractor: GetCurrentServerInteractor,
                                                   private val roomsInteractor: GetChatRoomsInteractor,
-                                                  private val mapper: MessageViewModelMapper,
+                                                  private val mapper: ViewModelMapper,
                                                   factory: RocketChatClientFactory,
                                                   getSettingsInteractor: GetSettingsInteractor) {
 
@@ -41,8 +42,8 @@ class PinnedMessagesPresenter @Inject constructor(private val view: PinnedMessag
                     val pinnedMessages =
                         client.getRoomPinnedMessages(roomId, room.type, pinnedMessagesListOffset)
                     pinnedMessagesListOffset = pinnedMessages.offset.toInt()
-                    val messageList = mapper.mapToViewModelList(pinnedMessages.result, settings)
-                        .filterNot { it.isSystemMessage }
+                    val messageList = mapper.map(pinnedMessages.result)
+                            .filter { it is MessageViewModel}.filterNot { (it as MessageViewModel).isSystemMessage }
                     view.showPinnedMessages(messageList)
                     view.hideLoading()
                 }.ifNull {

app/src/main/java/chat/rocket/android/chatroom/presentation/PinnedMessagesView.kt

 package chat.rocket.android.chatroom.presentation
 
-import chat.rocket.android.chatroom.viewmodel.MessageViewModel
+import chat.rocket.android.chatroom.viewmodel.BaseViewModel
 import chat.rocket.android.core.behaviours.LoadingView
 import chat.rocket.android.core.behaviours.MessageView
 
@@ -11,5 +11,5 @@ interface PinnedMessagesView : MessageView, LoadingView {
      *
      * @param pinnedMessages The list of pinned messages.
      */
-    fun showPinnedMessages(pinnedMessages: List<MessageViewModel>)
+    fun showPinnedMessages(pinnedMessages: List<BaseViewModel<*>>)
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomActivity.kt

@@ -13,8 +13,6 @@ import dagger.android.AndroidInjector
 import dagger.android.DispatchingAndroidInjector
 import dagger.android.support.HasSupportFragmentInjector
 import kotlinx.android.synthetic.main.app_bar_chat_room.*
-import me.imid.swipebacklayout.lib.SwipeBackLayout
-import me.imid.swipebacklayout.lib.app.SwipeBackActivity
 import javax.inject.Inject
 
 
@@ -32,7 +30,7 @@ private const val INTENT_CHAT_ROOM_NAME = "chat_room_name"
 private const val INTENT_CHAT_ROOM_TYPE = "chat_room_type"
 private const val INTENT_IS_CHAT_ROOM_READ_ONLY = "is_chat_room_read_only"
 
-class ChatRoomActivity : SwipeBackActivity(), HasSupportFragmentInjector {
+class ChatRoomActivity : AppCompatActivity(), HasSupportFragmentInjector {
     @Inject lateinit var fragmentDispatchingAndroidInjector: DispatchingAndroidInjector<Fragment>
     private lateinit var chatRoomId: String
     private lateinit var chatRoomName: String
@@ -56,8 +54,6 @@ class ChatRoomActivity : SwipeBackActivity(), HasSupportFragmentInjector {
         isChatRoomReadOnly = intent.getBooleanExtra(INTENT_IS_CHAT_ROOM_READ_ONLY, true)
         requireNotNull(chatRoomType) { "no is_chat_room_read_only provided in Intent extras" }
 
-        swipeBackLayout.setEdgeTrackingEnabled(SwipeBackLayout.EDGE_LEFT)
-
         setupToolbar(chatRoomName)
 
         addFragment("ChatRoomFragment", R.id.fragment_container) {
@@ -65,7 +61,9 @@ class ChatRoomActivity : SwipeBackActivity(), HasSupportFragmentInjector {
         }
     }
 
-    override fun onBackPressed() = finishActivity()
+    override fun onBackPressed() {
+        finishActivity()
+    }
 
     override fun supportFragmentInjector(): AndroidInjector<Fragment> {
         return fragmentDispatchingAndroidInjector

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomAdapter.kt

-package chat.rocket.android.chatroom.ui
-
-import android.support.v7.widget.RecyclerView
-import android.text.method.LinkMovementMethod
-import android.view.MenuItem
-import android.view.View
-import android.view.ViewGroup
-import android.widget.TextView
-import chat.rocket.android.R
-import chat.rocket.android.chatroom.presentation.ChatRoomPresenter
-import chat.rocket.android.chatroom.ui.bottomsheet.BottomSheetMenu
-import chat.rocket.android.chatroom.ui.bottomsheet.adapter.ActionListAdapter
-import chat.rocket.android.chatroom.viewmodel.AttachmentType
-import chat.rocket.android.chatroom.viewmodel.MessageViewModel
-import chat.rocket.android.player.PlayerActivity
-import chat.rocket.android.util.extensions.content
-import chat.rocket.android.util.extensions.inflate
-import chat.rocket.android.util.extensions.setVisible
-import com.facebook.drawee.view.SimpleDraweeView
-import com.stfalcon.frescoimageviewer.ImageViewer
-import kotlinx.android.synthetic.main.avatar.view.*
-import kotlinx.android.synthetic.main.item_message.view.*
-import kotlinx.android.synthetic.main.message_attachment.view.*
-import ru.whalemare.sheetmenu.extension.inflate
-import ru.whalemare.sheetmenu.extension.toList
-
-class ChatRoomAdapter(private val roomType: String,
-                      private val roomName: String,
-                      private val presenter: ChatRoomPresenter) : RecyclerView.Adapter<ChatRoomAdapter.ViewHolder>() {
-    private val dataSet = ArrayList<MessageViewModel>()
-
-    init {
-        setHasStableIds(true)
-    }
-
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder =
-            ViewHolder(parent.inflate(R.layout.item_message), roomType, roomName, presenter)
-
-    override fun onBindViewHolder(holder: ViewHolder, position: Int) = holder.bind(dataSet[position])
-
-    override fun getItemCount(): Int = dataSet.size
-
-    override fun getItemViewType(position: Int): Int = position
-
-    override fun getItemId(position: Int): Long = dataSet[position].id.hashCode().toLong()
-
-    fun addDataSet(dataSet: List<MessageViewModel>) {
-        val previousDataSetSize = this.dataSet.size
-        this.dataSet.addAll(previousDataSetSize, dataSet)
-        notifyItemRangeInserted(previousDataSetSize, dataSet.size)
-    }
-
-    fun addItem(message: MessageViewModel) {
-        dataSet.add(0, message)
-        notifyItemInserted(0)
-    }
-
-    fun updateItem(message: MessageViewModel) {
-        val index = dataSet.indexOfFirst { it.id == message.id }
-        if (index > -1) {
-            dataSet[index] = message
-            notifyItemChanged(index)
-        }
-    }
-
-    fun removeItem(messageId: String) {
-        val index = dataSet.indexOfFirst { it.id == messageId }
-        if (index > -1) {
-            dataSet.removeAt(index)
-            notifyItemRemoved(index)
-        }
-    }
-
-    class ViewHolder(itemView: View,
-                     val roomType: String,
-                     val roomName: String,
-                     val presenter: ChatRoomPresenter) : RecyclerView.ViewHolder(itemView), MenuItem.OnMenuItemClickListener {
-        private lateinit var messageViewModel: MessageViewModel
-
-        fun bind(message: MessageViewModel) = with(itemView) {
-            messageViewModel = message
-
-            image_avatar.setImageURI(message.avatarUri)
-            text_sender.text = message.senderName
-            text_message_time.content = message.time
-            text_content.content = message.content
-            text_content.movementMethod = LinkMovementMethod()
-            bindAttachment(message, message_attachment, image_attachment, audio_video_attachment, file_name)
-
-            text_content.setOnClickListener {
-                if (!message.isSystemMessage) {
-                    val menuItems = it.context.inflate(R.menu.message_actions).toList()
-                    menuItems.find { it.itemId == R.id.action_menu_msg_pin_unpin }?.apply {
-                        val isPinned = message.isPinned
-                        setTitle(if (isPinned) R.string.action_msg_unpin else R.string.action_msg_pin)
-                        setChecked(isPinned)
-                    }
-                    val adapter = ActionListAdapter(menuItems, this@ViewHolder)
-                    BottomSheetMenu(adapter).apply {
-
-                    }.show(it.context)
-                }
-            }
-        }
-
-        override fun onMenuItemClick(item: MenuItem): Boolean {
-            messageViewModel.apply {
-                when (item.itemId) {
-                    R.id.action_menu_msg_delete -> presenter.deleteMessage(roomId, id)
-                    R.id.action_menu_msg_quote -> presenter.citeMessage(roomType, roomName, id, false)
-                    R.id.action_menu_msg_reply -> presenter.citeMessage(roomType, roomName, id, true)
-                    R.id.action_menu_msg_copy -> presenter.copyMessage(id)
-                    R.id.action_menu_msg_edit -> presenter.editMessage(roomId, id, getOriginalMessage())
-                    R.id.action_menu_msg_pin_unpin -> {
-                        with(item) {
-                            if (!isChecked) {
-                                presenter.pinMessage(id)
-                            } else {
-                                presenter.unpinMessage(id)
-                            }
-                        }
-                    }
-                    else -> TODO("Not implemented")
-                }
-            }
-            return true
-        }
-
-        private fun bindAttachment(message: MessageViewModel,
-                                   attachment_container: View,
-                                   image_attachment: SimpleDraweeView,
-                                   audio_video_attachment: View,
-                                   file_name: TextView) {
-            with(message) {
-                if (attachmentUrl == null || attachmentType == null) {
-                    attachment_container.setVisible(false)
-                    return
-                }
-
-                var imageVisible = false
-                var videoVisible = false
-
-                attachment_container.setVisible(true)
-                when (message.attachmentType) {
-                    is AttachmentType.Image -> {
-                        imageVisible = true
-                        image_attachment.setImageURI(message.attachmentUrl)
-                        image_attachment.setOnClickListener { view ->
-                            // TODO - implement a proper image viewer with a proper Transition
-                            ImageViewer.Builder(view.context, listOf(message.attachmentUrl))
-                                    .setStartPosition(0)
-                                    .show()
-                        }
-                    }
-                    is AttachmentType.Video,
-                    is AttachmentType.Audio -> {
-                        videoVisible = true
-                        audio_video_attachment.setOnClickListener { view ->
-                            message.attachmentUrl?.let { url ->
-                                PlayerActivity.play(view.context, url)
-                            }
-                        }
-                    }
-                }
-
-                image_attachment.setVisible(imageVisible)
-                audio_video_attachment.setVisible(videoVisible)
-                file_name.text = message.attachmentTitle
-            }
-        }
-    }
-}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomFragment.kt

@@ -8,18 +8,25 @@ import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
 import android.os.Handler
+import android.support.annotation.DrawableRes
 import android.support.v4.app.Fragment
 import android.support.v7.widget.DefaultItemAnimator
 import android.support.v7.widget.LinearLayoutManager
 import android.support.v7.widget.RecyclerView
 import android.view.*
 import chat.rocket.android.R
+import chat.rocket.android.chatroom.adapter.ChatRoomAdapter
 import chat.rocket.android.chatroom.presentation.ChatRoomPresenter
 import chat.rocket.android.chatroom.presentation.ChatRoomView
-import chat.rocket.android.chatroom.viewmodel.MessageViewModel
+import chat.rocket.android.chatroom.viewmodel.BaseViewModel
 import chat.rocket.android.helper.EndlessRecyclerViewScrollListener
+import chat.rocket.android.helper.KeyboardHelper
 import chat.rocket.android.helper.MessageParser
 import chat.rocket.android.util.extensions.*
+import chat.rocket.android.widget.emoji.ComposerEditText
+import chat.rocket.android.widget.emoji.Emoji
+import chat.rocket.android.widget.emoji.EmojiKeyboardPopup
+import chat.rocket.android.widget.emoji.EmojiParser
 import dagger.android.support.AndroidSupportInjection
 import io.reactivex.disposables.CompositeDisposable
 import kotlinx.android.synthetic.main.fragment_chat_room.*
@@ -46,7 +53,7 @@ private const val BUNDLE_CHAT_ROOM_TYPE = "chat_room_type"
 private const val BUNDLE_IS_CHAT_ROOM_READ_ONLY = "is_chat_room_read_only"
 private const val REQUEST_CODE_FOR_PERFORM_SAF = 42
 
-class ChatRoomFragment : Fragment(), ChatRoomView {
+class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardPopup.Listener {
     @Inject lateinit var presenter: ChatRoomPresenter
     @Inject lateinit var parser: MessageParser
     private lateinit var adapter: ChatRoomAdapter
@@ -54,6 +61,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
     private lateinit var chatRoomId: String
     private lateinit var chatRoomName: String
     private lateinit var chatRoomType: String
+    private lateinit var emojiKeyboardPopup: EmojiKeyboardPopup
     private var isChatRoomReadOnly: Boolean = false
 
     private lateinit var actionSnackbar: ActionSnackbar
@@ -98,6 +106,11 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
         setupActionSnackbar()
     }
 
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        text_message.addTextChangedListener(EmojiKeyboardPopup.EmojiTextWatcher(text_message))
+    }
+
     override fun onDestroyView() {
         presenter.unsubscribeMessages()
         handler.removeCallbacksAndMessages(null)
@@ -132,12 +145,13 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
         return true
     }
 
-    override fun showMessages(dataSet: List<MessageViewModel>) {
+    override fun showMessages(dataSet: List<BaseViewModel<*>>) {
         activity?.apply {
             if (recycler_view.adapter == null) {
                 adapter = ChatRoomAdapter(chatRoomType, chatRoomName, presenter)
                 recycler_view.adapter = adapter
                 val linearLayoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, true)
+                linearLayoutManager.stackFromEnd = true
                 recycler_view.layoutManager = linearLayoutManager
                 recycler_view.itemAnimator = DefaultItemAnimator()
                 if (dataSet.size >= 30) {
@@ -148,7 +162,12 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
                     })
                 }
             }
-            adapter.addDataSet(dataSet)
+
+            val oldMessagesCount = adapter.itemCount
+            adapter.appendData(dataSet)
+            if (oldMessagesCount == 0 && dataSet.isNotEmpty()) {
+                recycler_view.scrollToPosition(0)
+            }
         }
     }
 
@@ -165,8 +184,8 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
 
     override fun showInvalidFileMessage() = showMessage(getString(R.string.msg_invalid_file))
 
-    override fun showNewMessage(message: MessageViewModel) {
-        adapter.addItem(message)
+    override fun showNewMessage(message: List<BaseViewModel<*>>) {
+        adapter.prependData(message)
         recycler_view.scrollToPosition(0)
     }
 
@@ -176,6 +195,8 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
 
     override fun enableSendMessageButton() {
         button_send.isEnabled = true
+        text_message.isEnabled = true
+        text_message.erase()
     }
 
     override fun clearMessageComposition() {
@@ -185,8 +206,8 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
         actionSnackbar.dismiss()
     }
 
-    override fun dispatchUpdateMessage(index: Int, message: MessageViewModel) {
-        adapter.updateItem(message)
+    override fun dispatchUpdateMessage(index: Int, message: List<BaseViewModel<*>>) {
+        adapter.updateItem(message.last())
     }
 
     override fun dispatchDeleteMessage(msgId: String) {
@@ -229,6 +250,28 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
         }
     }
 
+    override fun onEmojiAdded(emoji: Emoji) {
+        val cursorPosition = text_message.selectionStart
+        if (cursorPosition > -1) {
+            text_message.text.insert(cursorPosition, EmojiParser.parse(emoji.shortname))
+            text_message.setSelection(cursorPosition + emoji.unicode.length)
+        }
+    }
+
+    override fun onNonEmojiKeyPressed(keyCode: Int) {
+        when (keyCode) {
+            KeyEvent.KEYCODE_BACK -> with(text_message) {
+                if (selectionStart > 0) text.delete(selectionStart - 1, selectionStart)
+            }
+            else -> throw IllegalArgumentException("pressed key not expected")
+        }
+    }
+
+    private fun setReactionButtonIcon(@DrawableRes drawableId: Int) {
+        button_add_reaction.setImageResource(drawableId)
+        button_add_reaction.setTag(drawableId)
+    }
+
     override fun showFileSelection(filter: Array<String>) {
         val intent = Intent(Intent.ACTION_GET_CONTENT)
         intent.type = "*/*"
@@ -268,11 +311,30 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
             input_container.setVisible(false)
         } else {
             subscribeTextMessage()
+            emojiKeyboardPopup = EmojiKeyboardPopup(activity!!, activity!!.findViewById(R.id.fragment_container))
+            emojiKeyboardPopup.listener = this
+            text_message.listener = object : ComposerEditText.ComposerEditTextListener {
+                override fun onKeyboardOpened() {
+                }
+
+                override fun onKeyboardClosed() {
+                    activity?.let {
+                        if (!emojiKeyboardPopup.isKeyboardOpen) {
+                            it.onBackPressed()
+                        }
+                        KeyboardHelper.hideSoftKeyboard(it)
+                        emojiKeyboardPopup.dismiss()
+                    }
+                    setReactionButtonIcon(R.drawable.ic_reaction_24dp)
+                }
+            }
 
             button_send.setOnClickListener {
-                var message = citation ?: ""
-                message += text_message.textContent
-                sendMessage(message)
+                var textMessage = citation ?: ""
+                textMessage += text_message.textContent
+                sendMessage(textMessage)
+
+                clearMessageComposition()
             }
 
             button_show_attachment_options.setOnClickListener {
@@ -296,6 +358,31 @@ class ChatRoomFragment : Fragment(), ChatRoomView {
                     hideAttachmentOptions()
                 }, 400)
             }
+
+            button_add_reaction.setOnClickListener { view ->
+                openEmojiKeyboardPopup()
+            }
+        }
+    }
+
+    private fun openEmojiKeyboardPopup() {
+        if (!emojiKeyboardPopup.isShowing()) {
+            // If keyboard is visible, simply show the  popup
+            if (emojiKeyboardPopup.isKeyboardOpen) {
+                emojiKeyboardPopup.showAtBottom()
+            } else {
+                // Open the text keyboard first and immediately after that show the emoji popup
+                text_message.setFocusableInTouchMode(true)
+                text_message.requestFocus()
+                emojiKeyboardPopup.showAtBottomPending()
+                KeyboardHelper.showSoftKeyboard(text_message)
+
+            }
+            setReactionButtonIcon(R.drawable.ic_keyboard_black_24dp)
+        } else {
+            // If popup is showing, simply dismiss it to show the undelying text keyboard
+            emojiKeyboardPopup.dismiss()
+            setReactionButtonIcon(R.drawable.ic_reaction_24dp)
         }
     }
 

app/src/main/java/chat/rocket/android/chatroom/ui/PinnedMessagesAdapter.kt

-package chat.rocket.android.chatroom.ui
-
-import android.support.v7.widget.RecyclerView
-import android.text.method.LinkMovementMethod
-import android.view.View
-import android.view.ViewGroup
-import android.widget.ImageView
-import android.widget.TextView
-import chat.rocket.android.R
-import chat.rocket.android.chatroom.viewmodel.AttachmentType
-import chat.rocket.android.chatroom.viewmodel.MessageViewModel
-import chat.rocket.android.player.PlayerActivity
-import chat.rocket.android.util.extensions.content
-import chat.rocket.android.util.extensions.inflate
-import chat.rocket.android.util.extensions.setVisible
-import com.facebook.drawee.view.SimpleDraweeView
-import com.stfalcon.frescoimageviewer.ImageViewer
-import kotlinx.android.synthetic.main.avatar.view.*
-import kotlinx.android.synthetic.main.item_message.view.*
-import kotlinx.android.synthetic.main.message_attachment.view.*
-
-class PinnedMessagesAdapter : RecyclerView.Adapter<PinnedMessagesAdapter.ViewHolder>() {
-
-    init {
-        setHasStableIds(true)
-    }
-
-    val dataSet = ArrayList<MessageViewModel>()
-
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder =
-            ViewHolder(parent.inflate(R.layout.item_message))
-
-    override fun onBindViewHolder(holder: ViewHolder, position: Int) = holder.bind(dataSet[position])
-
-    override fun onBindViewHolder(holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        onBindViewHolder(holder, position)
-    }
-
-    override fun getItemCount(): Int = dataSet.size
-
-    override fun getItemViewType(position: Int): Int = position
-
-    fun addDataSet(dataSet: List<MessageViewModel>) {
-        val previousDataSetSize = this.dataSet.size
-        this.dataSet.addAll(previousDataSetSize, dataSet)
-        notifyItemRangeInserted(previousDataSetSize, dataSet.size)
-    }
-
-    fun addItem(message: MessageViewModel) {
-        dataSet.add(0, message)
-        notifyItemInserted(0)
-    }
-
-    fun updateItem(message: MessageViewModel) {
-        val index = dataSet.indexOfFirst { it.id == message.id }
-        if (index > -1) {
-            dataSet[index] = message
-            notifyItemChanged(index)
-        }
-    }
-
-    fun removeItem(messageId: String) {
-        val index = dataSet.indexOfFirst { it.id == messageId }
-        if (index > -1) {
-            dataSet.removeAt(index)
-            notifyItemRemoved(index)
-        }
-    }
-
-    override fun getItemId(position: Int): Long {
-        return dataSet[position].id.hashCode().toLong()
-    }
-
-    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
-
-        private lateinit var messageViewModel: MessageViewModel
-
-        fun bind(message: MessageViewModel) = with(itemView) {
-            messageViewModel = message
-            image_avatar.setImageURI(message.avatarUri)
-            text_sender.content = message.senderName
-            text_message_time.content = message.time
-            text_content.content = message.content
-            text_content.movementMethod = LinkMovementMethod()
-
-            bindAttachment(message, message_attachment, image_attachment, audio_video_attachment,
-                    file_name)
-        }
-
-        private fun bindAttachment(message: MessageViewModel,
-                                   attachment_container: View,
-                                   image_attachment: SimpleDraweeView,
-                                   audio_video_attachment: View,
-                                   file_name: TextView) {
-            with(message) {
-                if (attachmentUrl == null || attachmentType == null) {
-                    attachment_container.setVisible(false)
-                    return
-                }
-
-                var imageVisible = false
-                var videoVisible = false
-
-                attachment_container.setVisible(true)
-                when (message.attachmentType) {
-                    is AttachmentType.Image -> {
-                        imageVisible = true
-                        image_attachment.setImageURI(message.attachmentUrl)
-                        image_attachment.setOnClickListener { view ->
-                            // TODO - implement a proper image viewer with a proper Transition
-                            ImageViewer.Builder(view.context, listOf(message.attachmentUrl))
-                                    .setStartPosition(0)
-                                    .show()
-                        }
-                    }
-                    is AttachmentType.Video,
-                    is AttachmentType.Audio -> {
-                        videoVisible = true
-                        audio_video_attachment.setOnClickListener { view ->
-                            message.attachmentUrl?.let { url ->
-                                PlayerActivity.play(view.context, url)
-                            }
-                        }
-                    }
-                }
-
-                image_attachment.setVisible(imageVisible)
-                audio_video_attachment.setVisible(videoVisible)
-                file_name.text = message.attachmentTitle
-            }
-        }
-    }
-}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/ui/PinnedMessagesFragment.kt

@@ -9,9 +9,10 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import chat.rocket.android.R
+import chat.rocket.android.chatroom.adapter.ChatRoomAdapter
 import chat.rocket.android.chatroom.presentation.PinnedMessagesPresenter
 import chat.rocket.android.chatroom.presentation.PinnedMessagesView
-import chat.rocket.android.chatroom.viewmodel.MessageViewModel
+import chat.rocket.android.chatroom.viewmodel.BaseViewModel
 import chat.rocket.android.helper.EndlessRecyclerViewScrollListener
 import chat.rocket.android.util.extensions.setVisible
 import chat.rocket.android.util.extensions.showToast
@@ -39,7 +40,7 @@ class PinnedMessagesFragment : Fragment(), PinnedMessagesView {
     private lateinit var chatRoomId: String
     private lateinit var chatRoomName: String
     private lateinit var chatRoomType: String
-    private lateinit var adapter: PinnedMessagesAdapter
+    private lateinit var adapter: ChatRoomAdapter
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -71,10 +72,11 @@ class PinnedMessagesFragment : Fragment(), PinnedMessagesView {
 
     override fun showGenericErrorMessage() = showMessage(getString(R.string.msg_generic_error))
 
-    override fun showPinnedMessages(pinnedMessages: List<MessageViewModel>) {
+    override fun showPinnedMessages(pinnedMessages: List<BaseViewModel<*>>) {
         activity?.apply {
             if (recycler_view_pinned.adapter == null) {
-                adapter = PinnedMessagesAdapter()
+                // TODO - add a better constructor for this case...
+                adapter = ChatRoomAdapter(chatRoomType, chatRoomName, null, false)
                 recycler_view_pinned.adapter = adapter
                 val linearLayoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
                 recycler_view_pinned.layoutManager = linearLayoutManager
@@ -88,7 +90,7 @@ class PinnedMessagesFragment : Fragment(), PinnedMessagesView {
                 }
             }
 
-            adapter.addDataSet(pinnedMessages)
+            adapter.appendData(pinnedMessages)
         }
     }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/viewmodel/AudioAttachmentViewModel.kt

+package chat.rocket.android.chatroom.viewmodel
+
+import chat.rocket.android.R
+import chat.rocket.core.model.attachment.AudioAttachment
+
+data class AudioAttachmentViewModel(
+        override val rawData: AudioAttachment,
+        override val messageId: String,
+        override val attachmentUrl: String,
+        override val attachmentTitle: CharSequence,
+        override val id: Long
+) : BaseFileAttachmentViewModel<AudioAttachment> {
+    override val viewType: Int
+        get() = BaseViewModel.ViewType.AUDIO_ATTACHMENT.viewType
+    override val layoutId: Int
+        get() = R.layout.message_attachment
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/viewmodel/BaseFileAttachmentViewModel.kt

+package chat.rocket.android.chatroom.viewmodel
+
+interface BaseFileAttachmentViewModel<out T> : BaseViewModel<T> {
+    val attachmentUrl: String
+    val attachmentTitle: CharSequence
+    val id: Long
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/viewmodel/BaseMessageViewModel.kt

+package chat.rocket.android.chatroom.viewmodel
+
+interface BaseMessageViewModel<out T> : BaseViewModel<T> {
+    val avatar: String
+    val time: CharSequence
+    val senderName: CharSequence
+    val content: CharSequence
+    val isPinned: Boolean
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/viewmodel/BaseViewModel.kt

+package chat.rocket.android.chatroom.viewmodel
+
+import java.security.InvalidParameterException
+
+interface BaseViewModel<out T> {
+    val rawData: T
+    val messageId: String
+    val viewType: Int
+    val layoutId: Int
+
+    enum class ViewType(val viewType: Int) {
+        MESSAGE(0),
+        SYSTEM_MESSAGE(1),
+        URL_PREVIEW(2),
+        IMAGE_ATTACHMENT(3),
+        VIDEO_ATTACHMENT(4),
+        AUDIO_ATTACHMENT(5),
+        MESSAGE_ATTACHMENT(6)
+    }
+}
+
+internal fun Int.toViewType(): BaseViewModel.ViewType {
+    return BaseViewModel.ViewType.values().firstOrNull { it.viewType == this }
+            ?: throw InvalidParameterException("Invalid viewType: $this for BaseViewModel.ViewType")
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/viewmodel/ImageAttachmentViewModel.kt

+package chat.rocket.android.chatroom.viewmodel
+
+import chat.rocket.android.R
+import chat.rocket.core.model.attachment.ImageAttachment
+
+data class ImageAttachmentViewModel(
+        override val rawData: ImageAttachment,
+        override val messageId: String,
+        override val attachmentUrl: String,
+        override val attachmentTitle: CharSequence,
+        override val id: Long
+) : BaseFileAttachmentViewModel<ImageAttachment> {
+    override val viewType: Int
+        get() = BaseViewModel.ViewType.IMAGE_ATTACHMENT.viewType
+    override val layoutId: Int
+        get() = R.layout.message_attachment
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/viewmodel/MessageViewModelMapper.kt

-package chat.rocket.android.chatroom.viewmodel
-
-import android.content.Context
-import chat.rocket.android.helper.MessageParser
-import chat.rocket.android.infrastructure.LocalRepository
-import chat.rocket.android.server.domain.CurrentServerRepository
-import chat.rocket.android.server.domain.MessagesRepository
-import chat.rocket.core.TokenRepository
-import chat.rocket.core.model.Message
-import chat.rocket.core.model.Value
-import kotlinx.coroutines.experimental.CommonPool
-import kotlinx.coroutines.experimental.withContext
-import javax.inject.Inject
-
-class MessageViewModelMapper @Inject constructor(private val context: Context,
-                                                 private val tokenRepository: TokenRepository,
-                                                 private val messageParser: MessageParser,
-                                                 private val messagesRepository: MessagesRepository,
-                                                 private val localRepository: LocalRepository,
-                                                 private val currentServerRepository: CurrentServerRepository) {
-
-    suspend fun mapToViewModel(message: Message, settings: Map<String, Value<Any>>): MessageViewModel = withContext(CommonPool) {
-        MessageViewModel(
-                this@MessageViewModelMapper.context,
-                tokenRepository.get(),
-                message,
-                settings,
-                messageParser,
-                messagesRepository,
-                localRepository,
-                currentServerRepository
-        )
-    }
-
-    suspend fun mapToViewModelList(messageList: List<Message>, settings: Map<String, Value<Any>>): List<MessageViewModel> {
-        return messageList.map { MessageViewModel(context, tokenRepository.get(), it, settings,
-                messageParser, messagesRepository, localRepository, currentServerRepository) }
-    }
-}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/viewmodel/UrlPreviewViewModel.kt

+package chat.rocket.android.chatroom.viewmodel
+
+import chat.rocket.android.R
+import chat.rocket.core.model.url.Url
+
+data class UrlPreviewViewModel(
+    override val rawData: Url,
+    override val messageId: String,
+    val title: CharSequence?,
+    val hostname: String,
+    val description: CharSequence?,
+    val thumbUrl: String?
+) : BaseViewModel<Url> {
+    override val viewType: Int
+        get() = BaseViewModel.ViewType.URL_PREVIEW.viewType
+    override val layoutId: Int
+        get() = R.layout.message_url_preview
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatroom/viewmodel/VideoAttachmentViewModel.kt

+package chat.rocket.android.chatroom.viewmodel
+
+import chat.rocket.android.R
+import chat.rocket.core.model.attachment.VideoAttachment
+
+data class VideoAttachmentViewModel(
+        override val rawData: VideoAttachment,
+        override val messageId: String,
+        override val attachmentUrl: String,
+        override val attachmentTitle: CharSequence,
+        override val id: Long
+) : BaseFileAttachmentViewModel<VideoAttachment> {
+    override val viewType: Int
+        get() = BaseViewModel.ViewType.VIDEO_ATTACHMENT.viewType
+    override val layoutId: Int
+        get() = R.layout.message_attachment
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/chatrooms/ui/ChatRoomsAdapter.kt

@@ -2,16 +2,18 @@ package chat.rocket.android.chatrooms.ui
 
 import DateTimeHelper
 import android.content.Context
-import android.support.v4.content.res.ResourcesCompat
+import android.support.v4.content.ContextCompat
 import android.support.v7.widget.RecyclerView
 import android.view.View
 import android.view.ViewGroup
 import android.widget.TextView
 import chat.rocket.android.R
 import chat.rocket.android.helper.UrlHelper
+import chat.rocket.android.util.extensions.content
 import chat.rocket.android.util.extensions.inflate
 import chat.rocket.android.util.extensions.setVisible
 import chat.rocket.android.util.extensions.textContent
+import chat.rocket.common.model.RoomType
 import chat.rocket.core.model.ChatRoom
 import com.facebook.drawee.view.SimpleDraweeView
 import kotlinx.android.synthetic.main.avatar.view.*
@@ -28,8 +30,6 @@ class ChatRoomsAdapter(private val context: Context,
 
     override fun getItemCount(): Int = dataSet.size
 
-    override fun getItemViewType(position: Int): Int = position
-
     fun updateRooms(newRooms: List<ChatRoom>)  {
         dataSet.clear()
         dataSet.addAll(newRooms)
@@ -45,27 +45,40 @@ class ChatRoomsAdapter(private val context: Context,
             bindUnreadMessages(chatRoom, text_total_unread_messages)
 
             if (chatRoom.alert || chatRoom.unread > 0) {
-                text_chat_name.alpha = 1F
-                text_last_message_date_time.setTextColor(ResourcesCompat.getColor(resources, R.color.colorAccent, null))
-                text_last_message.setTextColor(ResourcesCompat.getColor(resources, android.R.color.primary_text_light, null))
+                text_chat_name.setTextColor(ContextCompat.getColor(context,
+                        R.color.colorPrimaryText))
+                text_last_message_date_time.setTextColor(ContextCompat.getColor(context,
+                        R.color.colorAccent))
+                text_last_message.setTextColor(ContextCompat.getColor(context,
+                        android.R.color.primary_text_light))
+            } else {
+                text_chat_name.setTextColor(ContextCompat.getColor(context,
+                        R.color.colorSecondaryText))
+                text_last_message_date_time.setTextColor(ContextCompat.getColor(context,
+                        R.color.colorSecondaryText))
+                text_last_message.setTextColor(ContextCompat.getColor(context,
+                        R.color.colorSecondaryText))
             }
 
             setOnClickListener { listener(chatRoom) }
         }
 
         private fun bindAvatar(chatRoom: ChatRoom, drawee: SimpleDraweeView) {
-            drawee.setImageURI(UrlHelper.getAvatarUrl(chatRoom.client.url, chatRoom.name))
+            val avatarId = if (chatRoom.type is RoomType.DirectMessage) chatRoom.name else "@${chatRoom.name}"
+            drawee.setImageURI(UrlHelper.getAvatarUrl(chatRoom.client.url, avatarId))
         }
 
         private fun bindName(chatRoom: ChatRoom, textView: TextView) {
-            textView.textContent = chatRoom.name
+            textView.content = chatRoom.name
         }
 
         private fun bindLastMessageDateTime(chatRoom: ChatRoom, textView: TextView) {
             val lastMessage = chatRoom.lastMessage
             if (lastMessage != null) {
                 val localDateTime = DateTimeHelper.getLocalDateTime(lastMessage.timestamp)
-                textView.textContent = DateTimeHelper.getDate(localDateTime, context)
+                textView.content = DateTimeHelper.getDate(localDateTime, context)
+            } else {
+                textView.content = ""
             }
         }
 
@@ -77,16 +90,18 @@ class ChatRoomsAdapter(private val context: Context,
                 val senderUsername = lastMessageSender.username
                 when (senderUsername) {
                     chatRoom.name -> {
-                        textView.textContent = message
+                        textView.content = message
                     }
                 // TODO Change to MySelf
                 //                chatRoom.user?.username -> {
                 //                    holder.lastMessage.textContent = context.getString(R.string.msg_you) + ": $message"
                 //                }
                     else -> {
-                        textView.textContent = "@$senderUsername: $message"
+                        textView.content = "@$senderUsername: $message"
                     }
                 }
+            } else {
+                textView.content = ""
             }
         }
 
@@ -101,6 +116,7 @@ class ChatRoomsAdapter(private val context: Context,
                     textView.textContent = context.getString(R.string.msg_more_than_ninety_nine_unread_messages)
                     textView.setVisible(true)
                 }
+                else -> textView.setVisible(false)
             }
         }
     }

app/src/main/java/chat/rocket/android/dagger/module/AppModule.kt

@@ -39,6 +39,7 @@ import ru.noties.markwon.il.AsyncDrawableLoader
 import ru.noties.markwon.spans.SpannableTheme
 import timber.log.Timber
 import java.util.concurrent.Executors
+import java.util.concurrent.TimeUnit
 import javax.inject.Singleton
 
 @Module
@@ -101,6 +102,9 @@ class AppModule {
     fun provideOkHttpClient(logger: HttpLoggingInterceptor): OkHttpClient {
         return OkHttpClient.Builder().apply {
             addInterceptor(logger)
+            connectTimeout(15, TimeUnit.SECONDS)
+            readTimeout(20, TimeUnit.SECONDS)
+            writeTimeout(15, TimeUnit.SECONDS)
         }.build()
     }
 

app/src/main/java/chat/rocket/android/helper/KeyboardHelper.kt

 package chat.rocket.android.helper
 
+import android.app.Activity
+import android.content.Context
 import android.graphics.Rect
 import android.view.View
+import android.view.inputmethod.InputMethodManager
+
 
 object KeyboardHelper {
 
@@ -21,4 +25,29 @@ object KeyboardHelper {
         val heightDiff = rootView.bottom - rect.bottom
         return heightDiff > softKeyboardHeight * dm.density
     }
+
+    /**
+     * Hide the soft keyboard.
+     *
+     * @param activity The current focused activity.
+     */
+    fun hideSoftKeyboard(activity: Activity) {
+        val currentFocus = activity.currentFocus
+        if (currentFocus != null) {
+            val inputMethodManager = activity.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+            inputMethodManager.hideSoftInputFromWindow(currentFocus.windowToken, InputMethodManager.HIDE_NOT_ALWAYS)
+        }
+    }
+
+    /**
+     * Show the soft keyboard for the given view.
+     *
+     * @param view View to receive input focus.
+     */
+    fun showSoftKeyboard(view: View) {
+        if (view.requestFocus()) {
+            val inputMethodManager = view.context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+            inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT, InputMethodManager.SHOW_IMPLICIT)
+        }
+    }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/server/domain/SettingsRepository.kt

@@ -83,3 +83,5 @@ fun Map<String, Value<Any>>.uploadMimeTypeFilter(): Array<String> {
 fun Map<String, Value<Any>>.uploadMaxFileSize(): Int {
     return this[UPLOAD_MAX_FILE_SIZE]?.value?.let { it as Int } ?: Int.MAX_VALUE
 }
+
+fun Map<String, Value<Any>>.baseUrl() : String? = this[SITE_URL]?.value as String
\ No newline at end of file

app/src/main/java/chat/rocket/android/util/extensions/Text.kt

 package chat.rocket.android.util.extensions
 
+import android.text.Spannable
+import android.text.Spanned
+import android.text.TextUtils
+import android.widget.EditText
 import android.widget.TextView
+import chat.rocket.android.widget.emoji.EmojiParser
+import chat.rocket.android.widget.emoji.EmojiTypefaceSpan
 import ru.noties.markwon.Markwon
 
 fun String.ifEmpty(value: String): String {
@@ -17,6 +23,14 @@ fun CharSequence.ifEmpty(value: String): CharSequence {
     return this
 }
 
+fun EditText.erase() {
+    this.text.clear()
+    val spans = this.text.getSpans(0, text.length, EmojiTypefaceSpan::class.java)
+    spans.forEach {
+        text.removeSpan(it)
+    }
+}
+
 var TextView.textContent: String
     get() = text.toString()
     set(value) {
@@ -29,12 +43,20 @@ var TextView.hintContent: String
         hint = value
     }
 
-var TextView.content: CharSequence
+var TextView.content: CharSequence?
     get() = text
     set(value) {
         Markwon.unscheduleDrawables(this)
         Markwon.unscheduleTableRows(this)
-        text = value
+        if (value is Spanned) {
+            val result = EmojiParser.parse(value.toString()) as Spannable
+            val end = if (value.length > result.length) result.length else value.length
+            TextUtils.copySpansFrom(value, 0, end, Any::class.java, result, 0)
+            text = result
+        } else {
+            val result = EmojiParser.parse(value.toString()) as Spannable
+            text = result
+        }
         Markwon.scheduleDrawables(this)
         Markwon.scheduleTableRows(this)
     }
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/CategoryPagerAdapter.kt

+package chat.rocket.android.widget.emoji
+
+import android.support.v4.view.PagerAdapter
+import android.support.v7.widget.DefaultItemAnimator
+import android.support.v7.widget.GridLayoutManager
+import android.support.v7.widget.RecyclerView
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import chat.rocket.android.R
+import chat.rocket.android.widget.emoji.EmojiKeyboardPopup.Listener
+import java.util.*
+
+class CategoryPagerAdapter(val listener: Listener) : PagerAdapter() {
+    override fun isViewFromObject(view: View, obj: Any): Boolean {
+        return view == obj
+    }
+
+    override fun instantiateItem(container: ViewGroup, position: Int): Any {
+        val view = LayoutInflater.from(container.context)
+                .inflate(R.layout.emoji_category_layout, container, false)
+        val layoutManager = GridLayoutManager(view.context, 8)
+        val recycler = view.findViewById(R.id.emojiRecyclerView) as RecyclerView
+        val adapter = EmojiAdapter(layoutManager.spanCount, listener)
+        val category = EmojiCategory.values().get(position)
+        val emojis = if (category != EmojiCategory.RECENTS) {
+            EmojiRepository.getEmojisByCategory(category)
+        } else {
+            EmojiRepository.getRecents()
+        }
+        adapter.addEmojis(emojis)
+        recycler.layoutManager = layoutManager
+        recycler.itemAnimator = DefaultItemAnimator()
+        recycler.adapter = adapter
+        recycler.isNestedScrollingEnabled = false
+        container.addView(view)
+        return view
+    }
+
+    override fun destroyItem(container: ViewGroup, position: Int, view: Any) {
+        container.removeView(view as View)
+    }
+
+    override fun getCount() = EmojiCategory.values().size
+
+    override fun getPageTitle(position: Int) = EmojiCategory.values()[position].textIcon()
+
+    class EmojiAdapter(val spanCount: Int, val listener: Listener) : RecyclerView.Adapter<EmojiRowViewHolder>() {
+        private var emojis = Collections.emptyList<Emoji>()
+
+        fun addEmojis(emojis: List<Emoji>) {
+            this.emojis = emojis
+            notifyItemRangeInserted(0, emojis.size)
+        }
+
+        override fun onBindViewHolder(holder: EmojiRowViewHolder, position: Int) {
+            holder.bind(emojis[position])
+        }
+
+        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): EmojiRowViewHolder {
+            val view = LayoutInflater.from(parent.context).inflate(R.layout.emoji_row_item, parent, false)
+            return EmojiRowViewHolder(view, itemCount, spanCount, listener)
+        }
+
+        override fun getItemCount(): Int = emojis.size
+    }
+
+    class EmojiRowViewHolder(itemView: View, val itemCount: Int, val spanCount: Int, val listener: Listener) : RecyclerView.ViewHolder(itemView) {
+        private val emojiView: TextView = itemView.findViewById(R.id.emoji)
+
+        fun bind(emoji: Emoji) {
+            val context = itemView.context
+            emojiView.text = EmojiParser.parse(emoji.unicode)
+            val remainder = itemCount % spanCount
+            val lastLineItemCount = if (remainder == 0) spanCount else remainder
+            val paddingBottom = context.resources.getDimensionPixelSize(R.dimen.picker_padding_bottom)
+            if (adapterPosition >= itemCount - lastLineItemCount) {
+                itemView.setPadding(0, 0, 0, paddingBottom)
+            }
+            itemView.setOnClickListener {
+                listener.onEmojiAdded(emoji)
+            }
+        }
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/ComposerEditText.kt

+package chat.rocket.android.widget.emoji
+
+import android.content.Context
+import android.support.v7.widget.AppCompatEditText
+import android.util.AttributeSet
+import android.view.KeyEvent
+
+class ComposerEditText : AppCompatEditText {
+    var listener: ComposerEditTextListener? = null
+
+    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) :
+            super(context, attrs, defStyleAttr) {
+        isFocusable = true
+        isFocusableInTouchMode = true
+        isClickable = true
+        isLongClickable = true
+    }
+
+    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, android.support.v7.appcompat.R.attr.editTextStyle)
+
+    constructor(context: Context) : this(context, null)
+
+    override fun dispatchKeyEventPreIme(event: KeyEvent): Boolean {
+        if (event.keyCode == KeyEvent.KEYCODE_BACK) {
+            val state = getKeyDispatcherState()
+            if (state != null) {
+                if (event.action == KeyEvent.ACTION_DOWN) {
+                    state.startTracking(event, this)
+                    listener?.onKeyboardClosed()
+                }
+                return true
+            }
+        }
+        return super.dispatchKeyEventPreIme(event)
+    }
+
+    override fun performClick(): Boolean {
+        listener?.onKeyboardOpened()
+        return super.performClick()
+    }
+
+    interface ComposerEditTextListener {
+        fun onKeyboardClosed()
+        fun onKeyboardOpened()
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/Emoji.kt

+package chat.rocket.android.widget.emoji
+
+data class Emoji(
+        val shortname: String,
+        val shortnameAlternates: List<String>,
+        val unicode: String,
+        val keywords: List<String>,
+        val category: String,
+        val count: Int = 0
+)
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiCategory.kt

+package chat.rocket.android.widget.emoji
+
+import android.support.annotation.DrawableRes
+import android.text.SpannableString
+import android.text.Spanned
+import chat.rocket.android.R
+
+enum class EmojiCategory {
+    RECENTS {
+        override fun resourceIcon() = R.drawable.ic_emoji_recents
+
+        override fun textIcon() = getTextIconFor("\uD83D\uDD58")
+    },
+    PEOPLE() {
+        override fun resourceIcon() = R.drawable.ic_emoji_people
+
+        override fun textIcon() = getTextIconFor("\uD83D\uDE00")
+    },
+    NATURE {
+        override fun resourceIcon() = R.drawable.ic_emoji_nature
+
+        override fun textIcon() = getTextIconFor("\uD83D\uDC3B")
+    },
+    FOOD {
+        override fun resourceIcon() = R.drawable.ic_emoji_food
+
+        override fun textIcon() = getTextIconFor("\uD83C\uDF4E")
+    },
+    ACTIVITY {
+        override fun resourceIcon() = R.drawable.ic_emoji_activity
+
+        override fun textIcon() = getTextIconFor("\uD83D\uDEB4")
+    },
+    TRAVEL {
+        override fun resourceIcon() = R.drawable.ic_emoji_travel
+
+        override fun textIcon() = getTextIconFor("\uD83C\uDFD9️")
+    },
+    OBJECTS {
+        override fun resourceIcon() = R.drawable.ic_emoji_objects
+
+        override fun textIcon() = getTextIconFor("\uD83D\uDD2A")
+    },
+    SYMBOLS {
+        override fun resourceIcon() = R.drawable.ic_emoji_symbols
+
+        override fun textIcon() = getTextIconFor("⚛")
+    },
+    FLAGS {
+        override fun resourceIcon() = R.drawable.ic_emoji_flags
+
+        override fun textIcon() = getTextIconFor("\uD83D\uDEA9")
+    };
+
+    abstract fun textIcon(): CharSequence
+
+    @DrawableRes
+    abstract fun resourceIcon(): Int
+
+    protected fun getTextIconFor(text: String): CharSequence {
+        val span = EmojiTypefaceSpan("sans-serif", EmojiRepository.cachedTypeface)
+        return SpannableString.valueOf(text).apply {
+            setSpan(span, 0, text.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
+        }
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiKeyboardPopup.kt

+package chat.rocket.android.widget.emoji
+
+import android.content.Context
+import android.support.design.widget.TabLayout
+import android.support.v4.view.ViewPager
+import android.support.v7.app.AppCompatActivity
+import android.text.Editable
+import android.text.TextWatcher
+import android.view.KeyEvent
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.EditText
+import android.widget.ImageView
+import chat.rocket.android.R
+
+
+class EmojiKeyboardPopup(context: Context, view: View) : OverKeyboardPopupWindow(context, view) {
+    private lateinit var viewPager: ViewPager
+    private lateinit var tabLayout: TabLayout
+    private lateinit var searchView: View
+    private lateinit var backspaceView: View
+    private lateinit var parentContainer: ViewGroup
+    var listener: Listener? = null
+
+    companion object {
+        const val PREF_EMOJI_RECENTS = "PREF_EMOJI_RECENTS"
+    }
+
+    override fun onCreateView(inflater: LayoutInflater): View {
+        val view = inflater.inflate(R.layout.emoji_popup_layout, null, false)
+        parentContainer = view.findViewById(R.id.emoji_keyboard_container)
+        viewPager = view.findViewById(R.id.pager_categories)
+        searchView = view.findViewById(R.id.emoji_search)
+        backspaceView = view.findViewById(R.id.emoji_backspace)
+        tabLayout = view.findViewById(R.id.tabs)
+        tabLayout.setupWithViewPager(viewPager)
+        return view
+    }
+
+    override fun onViewCreated(view: View) {
+        setupViewPager()
+        setupBottomBar()
+    }
+
+    private fun setupBottomBar() {
+        searchView.setOnClickListener {
+        }
+
+        backspaceView.setOnClickListener {
+            listener?.onNonEmojiKeyPressed(KeyEvent.KEYCODE_BACK)
+        }
+    }
+
+    private fun setupViewPager() {
+        context.let {
+            val callback = when (it) {
+                is Listener -> it
+                else -> {
+                    val fragments = (it as AppCompatActivity).supportFragmentManager.fragments
+                    if (fragments == null || fragments.size == 0 || !(fragments[0] is Listener)) {
+                        throw IllegalStateException("activity/fragment should implement Listener interface")
+                    }
+                    fragments[0] as Listener
+                }
+            }
+            viewPager.adapter = CategoryPagerAdapter(object : Listener {
+                override fun onNonEmojiKeyPressed(keyCode: Int) {
+                    // do nothing
+                }
+
+                override fun onEmojiAdded(emoji: Emoji) {
+                    EmojiRepository.addToRecents(emoji)
+                    callback.onEmojiAdded(emoji)
+                }
+            })
+
+            for (category in EmojiCategory.values()) {
+                val tab = tabLayout.getTabAt(category.ordinal)
+                val tabView = LayoutInflater.from(context).inflate(R.layout.emoji_picker_tab, null)
+                tab?.setCustomView(tabView)
+                val textView = tabView.findViewById(R.id.image_category) as ImageView
+                textView.setImageResource(category.resourceIcon())
+            }
+
+            val currentTab = if (EmojiRepository.getRecents().isEmpty()) EmojiCategory.PEOPLE.ordinal else
+                EmojiCategory.RECENTS.ordinal
+            viewPager.setCurrentItem(currentTab)
+        }
+    }
+
+    class EmojiTextWatcher(val editor: EditText) : TextWatcher {
+        @Volatile private var emojiToRemove = mutableListOf<EmojiTypefaceSpan>()
+
+        override fun afterTextChanged(s: Editable) {
+            val message = editor.getEditableText()
+
+            // Commit the emoticons to be removed.
+            for (span in emojiToRemove.toList()) {
+                val start = message.getSpanStart(span)
+                val end = message.getSpanEnd(span)
+
+                // Remove the span
+                message.removeSpan(span)
+
+                // Remove the remaining emoticon text.
+                if (start != end) {
+                    message.delete(start, end)
+                }
+                break
+            }
+            emojiToRemove.clear()
+        }
+
+        override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
+            if (after < count) {
+                val end = start + count
+                val message = editor.getEditableText()
+                val list = message.getSpans(start, end, EmojiTypefaceSpan::class.java)
+
+                for (span in list) {
+                    val spanStart = message.getSpanStart(span)
+                    val spanEnd = message.getSpanEnd(span)
+                    if (spanStart < end && spanEnd > start) {
+                        // Add to remove list
+                        emojiToRemove.add(span)
+                    }
+                }
+            }
+        }
+
+        override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
+        }
+    }
+
+    interface Listener {
+        /**
+         * When an emoji is selected on the picker.
+         *
+         * @param emoji The selected emoji
+         */
+        fun onEmojiAdded(emoji: Emoji)
+
+        /**
+         * When backspace key is clicked.
+         *
+         * @param keyCode The key code pressed as defined
+         *
+         * @see android.view.KeyEvent
+         */
+        fun onNonEmojiKeyPressed(keyCode: Int)
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiParser.kt

+package chat.rocket.android.widget.emoji
+
+import android.text.SpannableString
+import android.text.Spanned
+
+class EmojiParser {
+    companion object {
+        /**
+         * Parses a text string containing unicode characters and/or shortnames to a rendered
+         * Spannable.
+         *
+         * @param text The text to parse
+         * @return A rendered Spannable containing any supported emoji.
+         */
+        fun parse(text: CharSequence): CharSequence {
+            val unicodedText = EmojiRepository.shortnameToUnicode(text, true)
+            val spannableString = SpannableString.valueOf(unicodedText)
+            // Look for groups of emojis, set a CustomTypefaceSpan with the emojione font
+            val length = spannableString.length
+            var inEmoji = false
+            var emojiStart = 0
+            var offset = 0
+            while (offset < length) {
+                val codepoint = unicodedText.codePointAt(offset)
+                val count = Character.charCount(codepoint)
+                if (codepoint >= 0x200) {
+                    if (!inEmoji) {
+                        emojiStart = offset
+                    }
+                    inEmoji = true
+                } else {
+                    if (inEmoji) {
+                        spannableString.setSpan(EmojiTypefaceSpan("sans-serif", EmojiRepository.cachedTypeface),
+                                emojiStart, offset, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+                    }
+                    inEmoji = false
+                }
+                offset += count
+                if (offset >= length && inEmoji) {
+                    spannableString.setSpan(EmojiTypefaceSpan("sans-serif", EmojiRepository.cachedTypeface),
+                            emojiStart, offset, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+                }
+            }
+            return spannableString
+        }
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiRepository.kt

+package chat.rocket.android.widget.emoji
+
+import android.content.Context
+import android.content.SharedPreferences
+import android.graphics.Typeface
+import android.os.Build
+import org.json.JSONArray
+import org.json.JSONObject
+import java.io.BufferedReader
+import java.io.InputStream
+import java.io.InputStreamReader
+import java.util.*
+import java.util.regex.Pattern
+
+object EmojiRepository {
+    private val shortNameToUnicode = HashMap<String, String>()
+    private val SHORTNAME_PATTERN = Pattern.compile(":([-+\\w]+):")
+    private val ALL_EMOJIS = mutableListOf<Emoji>()
+    private lateinit var preferences: SharedPreferences
+    internal lateinit var cachedTypeface: Typeface
+
+    fun load(context: Context, path: String = "emoji.json") {
+        preferences = context.getSharedPreferences("emoji", Context.MODE_PRIVATE)
+        ALL_EMOJIS.clear()
+        cachedTypeface = Typeface.createFromAsset(context.assets, "fonts/emojione-android.ttf")
+        val stream = context.assets.open(path)
+        val emojis = loadEmojis(stream)
+        emojis.forEach {
+            val unicodeIntList = mutableListOf<Int>()
+            it.unicode.split("-").forEach {
+                val value = it.toInt(16)
+                if (value >= 0x10000) {
+                    val surrogatePair = calculateSurrogatePairs(value)
+                    unicodeIntList.add(surrogatePair.first)
+                    unicodeIntList.add(surrogatePair.second)
+                } else {
+                    unicodeIntList.add(value)
+                }
+            }
+            val unicodeIntArray = unicodeIntList.toIntArray()
+            val unicode = String(unicodeIntArray, 0, unicodeIntArray.size)
+            ALL_EMOJIS.add(it.copy(unicode = unicode))
+            shortNameToUnicode.apply {
+                put(it.shortname, unicode)
+                it.shortnameAlternates.forEach { alternate -> put(alternate, unicode) }
+            }
+        }
+    }
+
+    /**
+     * Get all loaded emojis as list of Emoji objects.
+     *
+     * @return All emojis for all categories.
+     */
+    fun getAll() = ALL_EMOJIS
+
+    /**
+     * Get all emojis for a given category.
+     *
+     * @param category Emoji category such as: PEOPLE, NATURE, ETC
+     *
+     * @return All emoji from specified category
+     */
+    fun getEmojisByCategory(category: EmojiCategory): List<Emoji> {
+        return ALL_EMOJIS.filter { it.category.toLowerCase() == category.name.toLowerCase() }
+    }
+
+    /**
+     * Get the emoji given by a specified shortname. Returns null if can't find any.
+     *
+     * @param shortname The emoji shortname to search for
+     *
+     * @return Emoji given by shortname or null
+     */
+    fun getEmojiByShortname(shortname: String) = ALL_EMOJIS.firstOrNull { it.shortname == shortname }
+
+    /**
+     * Add an emoji to the Recents category.
+     */
+    fun addToRecents(emoji: Emoji) {
+        val emojiShortname = emoji.shortname
+        val recentsJson = JSONObject(preferences.getString(EmojiKeyboardPopup.PREF_EMOJI_RECENTS, "{}"))
+        if (recentsJson.has(emojiShortname)) {
+            val useCount = recentsJson.getInt(emojiShortname)
+            recentsJson.put(emojiShortname, useCount + 1)
+        } else {
+            recentsJson.put(emojiShortname, 1)
+        }
+        preferences.edit().putString(EmojiKeyboardPopup.PREF_EMOJI_RECENTS, recentsJson.toString()).apply()
+    }
+
+    /**
+     * Get all recently used emojis ordered by usage count.
+     *
+     * @return All recent emojis ordered by usage.
+     */
+    fun getRecents(): List<Emoji> {
+        val list = mutableListOf<Emoji>()
+        val recentsJson = JSONObject(preferences.getString(EmojiKeyboardPopup.PREF_EMOJI_RECENTS, "{}"))
+        for (shortname in recentsJson.keys()) {
+            val emoji = getEmojiByShortname(shortname)
+            emoji?.let {
+                val useCount = recentsJson.getInt(it.shortname)
+                list.add(it.copy(count = useCount))
+            }
+        }
+        Collections.sort(list, { o1, o2 ->
+            o2.count - o1.count
+        })
+        return list
+    }
+
+    /**
+     * Replace shortnames to unicode characters.
+     */
+    fun shortnameToUnicode(input: CharSequence, removeIfUnsupported: Boolean): String {
+        val matcher = SHORTNAME_PATTERN.matcher(input)
+        val supported = Build.VERSION.SDK_INT >= 16
+        var result: String = input.toString()
+
+        while (matcher.find()) {
+            val unicode = shortNameToUnicode.get(":${matcher.group(1)}:")
+            if (unicode == null) {
+                continue
+            }
+
+            if (supported) {
+                result = result.replace(":" + matcher.group(1) + ":", unicode)
+            } else if (!supported && removeIfUnsupported) {
+                result = result.replace(":" + matcher.group(1) + ":", "")
+            }
+        }
+
+        return result
+    }
+
+    private fun loadEmojis(stream: InputStream): List<Emoji> {
+        val emojisJSON = JSONArray(inputStreamToString(stream))
+        val emojis = ArrayList<Emoji>(emojisJSON.length());
+        for (i in 0 until emojisJSON.length()) {
+            val emoji = buildEmojiFromJSON(emojisJSON.getJSONObject(i))
+            emoji?.let {
+                emojis.add(it)
+            }
+        }
+        return emojis
+    }
+
+    private fun buildEmojiFromJSON(json: JSONObject): Emoji? {
+        if (!json.has("shortname") || !json.has("unicode")) {
+            return null
+        }
+        return Emoji(shortname = json.getString("shortname"),
+                unicode = json.getString("unicode"),
+                shortnameAlternates = buildStringListFromJsonArray(json.getJSONArray("shortnameAlternates")),
+                category = json.getString("category"),
+                keywords = buildStringListFromJsonArray(json.getJSONArray("keywords")))
+    }
+
+    private fun buildStringListFromJsonArray(array: JSONArray): List<String> {
+        val list = ArrayList<String>(array.length())
+        for (i in 0..array.length() - 1) {
+            list.add(array.getString(i))
+        }
+        return list
+    }
+
+    private fun inputStreamToString(stream: InputStream): String {
+        val sb = StringBuilder()
+        val isr = InputStreamReader(stream, Charsets.UTF_8)
+        val br = BufferedReader(isr)
+        var read: String? = br.readLine()
+        while (read != null) {
+            sb.append(read)
+            read = br.readLine()
+        }
+        br.close()
+        return sb.toString()
+    }
+
+    private fun calculateSurrogatePairs(scalar: Int): Pair<Int, Int> {
+        val temp: Int = (scalar - 0x10000) / 0x400
+        val s1: Int = Math.floor(temp.toDouble()).toInt() + 0xD800
+        val s2: Int = ((scalar - 0x10000) % 0x400) + 0xDC00
+        return Pair(s1, s2)
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiTypefaceSpan.kt

+package chat.rocket.android.widget.emoji
+
+import android.graphics.Paint
+import android.graphics.Typeface
+import android.text.TextPaint
+import android.text.style.TypefaceSpan
+
+class EmojiTypefaceSpan(family: String, private val newType: Typeface) : TypefaceSpan(family) {
+
+    override fun updateDrawState(ds: TextPaint) {
+        applyCustomTypeFace(ds, newType)
+    }
+
+    override fun updateMeasureState(paint: TextPaint) {
+        applyCustomTypeFace(paint, newType)
+    }
+
+    private fun applyCustomTypeFace(paint: Paint, tf: Typeface) {
+        val oldStyle: Int
+        val old = paint.getTypeface()
+        if (old == null) {
+            oldStyle = 0
+        } else {
+            oldStyle = old.getStyle()
+        }
+
+        val fake = oldStyle and tf.style.inv()
+        if (fake and Typeface.BOLD != 0) {
+            paint.setFakeBoldText(true)
+        }
+
+        if (fake and Typeface.ITALIC != 0) {
+            paint.setTextSkewX(-0.25f)
+        }
+
+        paint.setTypeface(tf)
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/OverKeyboardPopupWindow.kt

+/**
+ * Copyright 2015 YA LLC
+ *
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package chat.rocket.android.widget.emoji
+
+import android.content.Context
+import android.graphics.Point
+import android.graphics.Rect
+import android.os.Build
+import android.view.*
+import android.widget.PopupWindow
+import chat.rocket.android.BuildConfig
+import chat.rocket.android.R
+
+/**
+ * Base class to create popup window that appears over software keyboard.
+ */
+abstract class OverKeyboardPopupWindow(val context: Context, private val rootView: View) : PopupWindow(context), ViewTreeObserver.OnGlobalLayoutListener {
+
+    /**
+     * @return keyboard height in pixels
+     */
+    var keyboardHeight = 0
+        private set
+    private var pendingOpen = false
+    /**
+     * @return Returns true if the soft keyboard is open, false otherwise.
+     */
+    var isKeyboardOpen = false
+        private set
+
+    private var keyboardHideListener: OnKeyboardHideListener? = null
+
+    interface OnKeyboardHideListener {
+        fun onKeyboardHide()
+    }
+
+    init {
+        setBackgroundDrawable(null)
+        if (BuildConfig.VERSION_CODE >= Build.VERSION_CODES.LOLLIPOP) {
+            elevation = 0f
+        }
+        val view = onCreateView(LayoutInflater.from(context))
+        onViewCreated(view)
+        contentView = view
+        softInputMode = WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE
+
+        // Default size
+        setSize(this.context.resources.getDimensionPixelSize(R.dimen.supposed_keyboard_height),
+                WindowManager.LayoutParams.MATCH_PARENT)
+        setSizeForSoftKeyboard()
+    }
+
+    fun setKeyboardHideListener(keyboardHideListener: OnKeyboardHideListener) {
+        this.keyboardHideListener = keyboardHideListener
+    }
+
+    /**
+     * Manually set the popup window size
+     *
+     * @param width  Width of the popup
+     * @param height Height of the popup
+     */
+    fun setSize(width: Int, height: Int) {
+        setWidth(width)
+        setHeight(height)
+    }
+
+    /**
+     * Call this function to resize the emoji popup according to your soft keyboard size
+     */
+    fun setSizeForSoftKeyboard() {
+        val viewTreeObserver = rootView.viewTreeObserver
+        viewTreeObserver.addOnGlobalLayoutListener(this)
+    }
+
+    override fun onGlobalLayout() {
+        val r = Rect()
+        rootView.getWindowVisibleDisplayFrame(r)
+
+        val screenHeight = calculateScreenHeight()
+        var heightDifference = screenHeight - (r.bottom - r.top)
+
+        val resources = context.resources
+        val resourceId = resources.getIdentifier("status_bar_height", "dimen", "android")
+        if (resourceId > 0) {
+            heightDifference -= resources.getDimensionPixelSize(resourceId)
+        }
+
+        if (heightDifference > 100) {
+            keyboardHeight = heightDifference
+            setSize(WindowManager.LayoutParams.MATCH_PARENT, keyboardHeight)
+
+            isKeyboardOpen = true
+            if (pendingOpen) {
+                showAtBottom()
+                pendingOpen = false
+            }
+        } else {
+            if (isKeyboardOpen && keyboardHideListener != null) {
+                keyboardHideListener!!.onKeyboardHide()
+            }
+            isKeyboardOpen = false
+        }
+    }
+
+    private fun calculateScreenHeight(): Int {
+        val wm = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
+        val display = wm.getDefaultDisplay()
+        val size = Point()
+        display.getSize(size)
+        return size.y
+    }
+
+    /**
+     * Use this function to show the popup.
+     * NOTE: Since, the soft keyboard sizes are variable on different android devices, the
+     * library needs you to open the soft keyboard at least once before calling this function.
+     * If that is not possible see showAtBottomPending() function.
+     */
+    fun showAtBottom() {
+        showAtLocation(rootView, Gravity.BOTTOM, 0, 0)
+    }
+
+    /**
+     * Use this function when the soft keyboard has not been opened yet. This
+     * will show the popup after the keyboard is up next time.
+     * Generally, you will be calling InputMethodManager.showSoftInput function after
+     * calling this function.
+     */
+    fun showAtBottomPending() {
+        if (isKeyboardOpen) {
+            showAtBottom()
+        } else {
+            pendingOpen = true
+        }
+    }
+
+    abstract fun onCreateView(inflater: LayoutInflater): View
+
+    abstract fun onViewCreated(view: View)
+
+
+}
\ No newline at end of file

app/src/main/res/drawable/ic_backspace_gray_24dp.xml

+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportHeight="24"
+    android:viewportWidth="24">
+
+    <path android:pathData="M0,0 L24,0 L24,24 L0,24 Z" />
+    <path
+        android:fillColor="@color/colorEmojiIcon"
+        android:pathData="M22,3 L7,3 C6.31,3,5.77,3.35,5.41,3.88 L0,12 L5.41,20.11
+C5.77,20.64,6.31,21,7,21 L22,21 C23.1,21,24,20.1,24,19 L24,5 C24,3.9,23.1,3,22,3
+Z M19,15.59 L17.59,17 L14,13.41 L10.41,17 L9,15.59 L12.59,12 L9,8.41 L10.41,7
+L14,10.59 L17.59,7 L19,8.41 L15.41,12 L19,15.59 Z" />
+</vector>
\ No newline at end of file

app/src/main/res/drawable/ic_keyboard_black_24dp.xml

+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="#000000"
+        android:pathData="M20,5 L4,5 C2.9,5,2.01,5.9,2.01,7 L2,17 C2,18.1,2.9,19,4,19 L20,19
+C21.1,19,22,18.1,22,17 L22,7 C22,5.9,21.1,5,20,5 Z M11,8 L13,8 L13,10 L11,10
+L11,8 Z M11,11 L13,11 L13,13 L11,13 L11,11 Z M8,8 L10,8 L10,10 L8,10 L8,8 Z
+M8,11 L10,11 L10,13 L8,13 L8,11 Z M7,13 L5,13 L5,11 L7,11 L7,13 Z M7,10 L5,10
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+L16,13 Z M16,10 L14,10 L14,8 L16,8 L16,10 Z M19,13 L17,13 L17,11 L19,11 L19,13 Z
+M19,10 L17,10 L17,8 L19,8 L19,10 Z" />
+    <path
+        android:pathData="M0,0 L24,0 L24,24 L0,24 Z M-24,0 L0,0 L0,24 L0,24 Z" />
+</vector>
\ No newline at end of file

app/src/main/res/drawable/ic_search_gray_24px.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:autoMirrored="true"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="@color/colorEmojiIcon"
+        android:pathData="M15.5,14h-0.79l-0.28,-0.27C15.41,12.59 16,11.11 16,9.5 16,5.91 13.09,3 9.5,3S3,5.91 3,9.5 5.91,16 9.5,16c1.61,0 3.09,-0.59 4.23,-1.57l0.27,0.28v0.79l5,4.99L20.49,19l-4.99,-5zM9.5,14C7.01,14 5,11.99 5,9.5S7.01,5 9.5,5 14,7.01 14,9.5 11.99,14 9.5,14z" />
+</vector>

app/src/main/res/drawable/ic_search_white_24px.xml

-<vector android:autoMirrored="true" android:height="24dp"
-    android:viewportHeight="24.0" android:viewportWidth="24.0"
-    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
-    <path android:fillColor="#FFFFFF" android:pathData="M15.5,14h-0.79l-0.28,-0.27C15.41,12.59 16,11.11 16,9.5 16,5.91 13.09,3 9.5,3S3,5.91 3,9.5 5.91,16 9.5,16c1.61,0 3.09,-0.59 4.23,-1.57l0.27,0.28v0.79l5,4.99L20.49,19l-4.99,-5zM9.5,14C7.01,14 5,11.99 5,9.5S7.01,5 9.5,5 14,7.01 14,9.5 11.99,14 9.5,14z"/>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:autoMirrored="true"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M15.5,14h-0.79l-0.28,-0.27C15.41,12.59 16,11.11 16,9.5 16,5.91 13.09,3 9.5,3S3,5.91 3,9.5 5.91,16 9.5,16c1.61,0 3.09,-0.59 4.23,-1.57l0.27,0.28v0.79l5,4.99L20.49,19l-4.99,-5zM9.5,14C7.01,14 5,11.99 5,9.5S7.01,5 9.5,5 14,7.01 14,9.5 11.99,14 9.5,14z" />
 </vector>

app/src/main/res/layout/emoji_category_layout.xml

+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/emojiRecyclerView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file