Removes TextDrawable library references.

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

 import android.content.Context
-import android.graphics.Typeface
 import android.graphics.drawable.Drawable
 import android.support.v4.content.ContextCompat
 import android.support.v4.graphics.drawable.DrawableCompat
 import android.widget.EditText
 import android.widget.TextView
 import chat.rocket.android.R
-import chat.rocket.android.helper.TextHelper
-import com.amulyakhare.textdrawable.TextDrawable
 
 object DrawableHelper {
-    private val AVATAR_BACKGROUND_HEXADECIMAL_COLORS = intArrayOf(
-            0xFFF44336.toInt(), 0xFFE91E63.toInt(), 0xFF9C27B0.toInt(), 0xFF673AB7.toInt(), 0xFF3F51B5.toInt(),
-            0xFF2196F3.toInt(), 0xFF03A9F4.toInt(), 0xFF00BCD4.toInt(), 0xFF009688.toInt(), 0xFF4CAF50.toInt(),
-            0xFF8BC34A.toInt(), 0xFFCDDC39.toInt(), 0xFFFFC107.toInt(), 0xFFFF9800.toInt(), 0xFFFF5722.toInt(),
-            0xFF795548.toInt(), 0xFF9E9E9E.toInt(), 0xFF607D8B.toInt())
+
     /**
      * Returns a Drawable from its ID.
      *
@@ -123,29 +116,4 @@ object DrawableHelper {
         }
         return userStatusDrawable
     }
-
-    /**
-     * Returns a drawable with the first character from a string.
-     *
-     * @param string The string to get its first character and to get the avatar background color.
-     * @return A drawable with the string first character.
-     */
-    fun getTextDrawable(string: String): Drawable {
-        return TextDrawable.builder()
-                .beginConfig()
-                .useFont(Typeface.SANS_SERIF)
-                .endConfig()
-                .buildRoundRect(TextHelper.getFirstCharacter(string), getAvatarBackgroundColor(string), 4)
-    }
-
-    /**
-     * Returns a background color to be rendered on the avatar.
-     *
-     * @param string Gets the background color based on the provided string.
-     * @return A hexadecimal color.
-     * @see (Rocket.Chat/server/startup/avatar.js)
-     */
-    private fun getAvatarBackgroundColor(string: String): Int {
-        return AVATAR_BACKGROUND_HEXADECIMAL_COLORS[string.length % AVATAR_BACKGROUND_HEXADECIMAL_COLORS.size]
-    }
 }
\ No newline at end of file

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

@@ -39,7 +39,7 @@ class ChatRoomsAdapter(private val context: Context,
     inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
 
         fun bind(chatRoom: ChatRoom) = with(itemView) {
-            bindAvatar(chatRoom, layout_avatar, image_avatar, image_room_avatar)
+            bindAvatar(chatRoom, image_avatar)
             bindName(chatRoom, text_chat_name)
             bindLastMessageDateTime(chatRoom, text_last_message_date_time)
             bindLastMessage(chatRoom, text_last_message)
@@ -48,17 +48,8 @@ class ChatRoomsAdapter(private val context: Context,
             setOnClickListener { listener(chatRoom) }
         }
 
-        private fun bindAvatar(chatRoom: ChatRoom, avatarLayout: View, drawee: SimpleDraweeView, imageView: ImageView) {
-            val chatRoomName = chatRoom.name
-            if (chatRoom.type is RoomType.DirectMessage) {
-                drawee.setImageURI(UrlHelper.getAvatarUrl(chatRoom.client.url, chatRoomName))
-                imageView.setVisible(false)
-                avatarLayout.setVisible(true)
-            } else {
-                imageView.setImageDrawable(DrawableHelper.getTextDrawable(chatRoomName))
-                avatarLayout.setVisible(false)
-                imageView.setVisible(true)
-            }
+        private fun bindAvatar(chatRoom: ChatRoom, drawee: SimpleDraweeView) {
+            drawee.setImageURI(UrlHelper.getAvatarUrl(chatRoom.client.url, chatRoom.name))
         }
 
         private fun bindName(chatRoom: ChatRoom, textView: TextView) {

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

@@ -9,33 +9,15 @@
     android:layout_marginStart="@dimen/screen_edge_left_and_right_margins"
     android:layout_marginTop="12dp">
 
-    <android.support.constraint.ConstraintLayout
-        android:id="@+id/avatar_container"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toLeftOf="@+id/middle_container"
-        app:layout_constraintTop_toTopOf="parent">
-
     <include
         android:id="@+id/layout_avatar"
         layout="@layout/avatar"
         android:layout_width="40dp"
         android:layout_height="40dp"
-            android:visibility="gone" />
-
-        <!-- We need to build the avatar with initials since the server returns a SVG file with a pre defined 50x50 pixel.
-            TODO: check to scale the SVG file on the app and remove the view bellow (or make the server to return a jpg file.
-            SVG scaling with fresco is impossible: http://frescolib.org/docs/resizing.html
-         -->
-        <ImageView
-            android:id="@+id/image_room_avatar"
-            android:layout_width="40dp"
-            android:layout_height="40dp"
-            android:visibility="gone"
-            tools:ignore="contentDescription" />
-    </android.support.constraint.ConstraintLayout>
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toLeftOf="@+id/middle_container"
+        app:layout_constraintTop_toTopOf="parent" />
 
     <android.support.constraint.ConstraintLayout
         android:id="@+id/middle_container"
@@ -43,7 +25,7 @@
         android:layout_height="wrap_content"
         android:layout_marginEnd="16dp"
         android:layout_marginStart="16dp"
-        app:layout_constraintLeft_toRightOf="@+id/avatar_container"
+        app:layout_constraintLeft_toRightOf="@+id/layout_avatar"
         app:layout_constraintRight_toLeftOf="@+id/right_container">
 
         <TextView