Fix Alert Dialog Button

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

 package chat.rocket.android.chatroom.ui
 
 import android.app.Activity
-import android.app.AlertDialog
+import androidx.appcompat.app.AlertDialog
 import android.content.ClipData
 import android.content.ClipboardManager
 import android.content.Context
@@ -200,7 +200,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
     private var verticalScrollOffset = AtomicInteger(0)
 
     private val dialogView by lazy { View.inflate(context, R.layout.file_attachments_dialog, null) }
-    internal val alertDialog by lazy { AlertDialog.Builder(activity).setView(dialogView).create() }
+    internal val alertDialog by lazy { activity?.let { AlertDialog.Builder(it).setView(dialogView).create() } }
     internal val imagePreview by lazy { dialogView.findViewById<ImageView>(R.id.image_preview) }
     internal val sendButton by lazy { dialogView.findViewById<android.widget.Button>(R.id.button_send) }
     internal val cancelButton by lazy { dialogView.findViewById<android.widget.Button>(R.id.button_cancel) }

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

@@ -75,10 +75,10 @@ fun ChatRoomFragment.showFileAttachmentDialog(uri: Uri) {
                 (citation ?: "") + description.text.toString()
             )
         }
-        alertDialog.dismiss()
+        alertDialog?.dismiss()
     }
-    cancelButton.setOnClickListener { alertDialog.dismiss() }
-    alertDialog.show()
+    cancelButton.setOnClickListener { alertDialog?.dismiss() }
+    alertDialog?.show()
 }
 
 fun ChatRoomFragment.showDrawAttachmentDialog(byteArray: ByteArray) {
@@ -92,9 +92,9 @@ fun ChatRoomFragment.showDrawAttachmentDialog(byteArray: ByteArray) {
             byteArray,
             (citation ?: "") + description.text.toString()
         )
-        alertDialog.dismiss()
+        alertDialog?.dismiss()
     }
 
-    cancelButton.setOnClickListener { alertDialog.dismiss() }
-    alertDialog.show()
+    cancelButton.setOnClickListener { alertDialog?.dismiss() }
+    alertDialog?.show()
 }
\ No newline at end of file

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

 package chat.rocket.android.chatrooms.ui
 
-import android.app.AlertDialog
+import androidx.appcompat.app.AlertDialog
 import android.app.ProgressDialog
 import android.os.Bundle
 import android.os.Handler
@@ -236,14 +236,16 @@ class ChatRoomsFragment : Fragment(), ChatRoomsView {
                     )
                 }
 
-                AlertDialog.Builder(context)
-                    .setTitle(R.string.dialog_sort_title)
-                    .setView(dialogLayout)
-                    .setPositiveButton(R.string.msg_sort) { dialog, _ ->
-                        invalidateQueryOnSearch()
-                        updateSort()
-                        dialog.dismiss()
-                    }.show()
+                context?.let {
+                    AlertDialog.Builder(it)
+                            .setTitle(R.string.dialog_sort_title)
+                            .setView(dialogLayout)
+                            .setPositiveButton(R.string.msg_sort) { dialog, _ ->
+                                invalidateQueryOnSearch()
+                                updateSort()
+                                dialog.dismiss()
+                            }.show()
+                }
             }
         }
         return super.onOptionsItemSelected(item)

app/src/main/java/chat/rocket/android/main/ui/MainActivity.kt

@@ -2,7 +2,7 @@ package chat.rocket.android.main.ui
 
 import DrawableHelper
 import android.app.Activity
-import android.app.AlertDialog
+import androidx.appcompat.app.AlertDialog
 import android.app.ProgressDialog
 import android.os.Bundle
 import androidx.annotation.IdRes

app/src/main/java/chat/rocket/android/profile/ui/ProfileFragment.kt

@@ -2,7 +2,7 @@ package chat.rocket.android.profile.ui
 
 import DrawableHelper
 import android.app.Activity
-import android.app.AlertDialog
+import androidx.appcompat.app.AlertDialog
 import android.content.Intent
 import android.graphics.Bitmap
 import android.os.Build
@@ -296,14 +296,16 @@ class ProfileFragment : Fragment(), ProfileView, ActionMode.Callback {
         val passwordEditText = EditText(context)
         passwordEditText.hint = getString(R.string.msg_password)
 
-        val builder = AlertDialog.Builder(context)
-        builder.setTitle(R.string.title_are_you_sure)
-            .setView(passwordEditText)
-            .setPositiveButton(R.string.action_delete_account) { _, _ ->
-                presenter.deleteAccount(passwordEditText.text.toString())
-            }
-            .setNegativeButton(android.R.string.no) { dialog, _ -> dialog.cancel() }
-            .create()
-            .show()
+        context?.let {
+            val builder = AlertDialog.Builder(it)
+            builder.setTitle(R.string.title_are_you_sure)
+                    .setView(passwordEditText)
+                    .setPositiveButton(R.string.action_delete_account) { _, _ ->
+                        presenter.deleteAccount(passwordEditText.text.toString())
+                    }
+                    .setNegativeButton(android.R.string.no) { dialog, _ -> dialog.cancel() }
+                    .create()
+                    .show()
+        }
     }
 }