Adding bubbles support

app/src/main/AndroidManifest.xml

@@ -168,6 +168,13 @@
             android:name=".chat.ChatActivity"
             android:theme="@style/AppTheme" />
 
+        <activity
+            android:name=".chat.BubbleActivity"
+            android:theme="@style/AppTheme"
+            android:allowEmbedded="true"
+            android:resizeableActivity="true"
+            android:documentLaunchMode="always" />
+
         <activity
             android:name=".activities.CallActivity"
             android:configChanges="screenSize|smallestScreenSize|screenLayout|orientation"

app/src/main/java/com/nextcloud/talk/chat/BubbleActivity.kt

@@ -0,0 +1,93 @@
+/*
+ * Nextcloud Talk - Android Client
+ *
+ * SPDX-FileCopyrightText: 2025 Alexandre Wery <nextcloud-talk-android@alwy.be>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package com.nextcloud.talk.chat
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
+import com.nextcloud.talk.R
+import com.nextcloud.talk.activities.MainActivity
+import com.nextcloud.talk.utils.bundle.BundleKeys
+
+class BubbleActivity : ChatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+        supportActionBar?.setHomeAsUpIndicator(R.drawable.ic_talk)
+        supportActionBar?.setDisplayShowHomeEnabled(true)
+        findViewById<androidx.appcompat.widget.Toolbar>(R.id.chat_toolbar)?.setNavigationOnClickListener {
+            openConversationList()
+        }
+
+        onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                moveTaskToBack(false)
+            }
+        })
+    }
+
+    override fun onPrepareOptionsMenu(menu: android.view.Menu): Boolean {
+        super.onPrepareOptionsMenu(menu)
+
+        menu.findItem(R.id.create_conversation_bubble)?.isVisible = false
+        menu.findItem(R.id.open_conversation_in_app)?.isVisible = true
+
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: android.view.MenuItem): Boolean =
+        when (item.itemId) {
+            R.id.open_conversation_in_app -> {
+                openInMainApp()
+                true
+            }
+            android.R.id.home -> {
+                openConversationList()
+                true
+            }
+            else -> super.onOptionsItemSelected(item)
+        }
+
+    private fun openInMainApp() {
+        val intent = Intent(this, MainActivity::class.java).apply {
+            action = Intent.ACTION_MAIN
+            addCategory(Intent.CATEGORY_LAUNCHER)
+            putExtras(this@BubbleActivity.intent)
+            conversationUser?.id?.let { putExtra(BundleKeys.KEY_INTERNAL_USER_ID, it) }
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP
+        }
+        startActivity(intent)
+    }
+
+    private fun openConversationList() {
+        val intent = Intent(this, MainActivity::class.java).apply {
+            action = Intent.ACTION_MAIN
+            addCategory(Intent.CATEGORY_LAUNCHER)
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP
+        }
+        startActivity(intent)
+    }
+
+    @Deprecated("Deprecated in Java")
+    override fun onSupportNavigateUp(): Boolean {
+        openInMainApp()
+        return true
+    }
+
+    companion object {
+        fun newIntent(context: Context, roomToken: String, conversationName: String?): Intent =
+            Intent(context, BubbleActivity::class.java).apply {
+                putExtra(BundleKeys.KEY_ROOM_TOKEN, roomToken)
+                conversationName?.let { putExtra(BundleKeys.KEY_CONVERSATION_NAME, it) }
+                action = Intent.ACTION_VIEW
+                flags = Intent.FLAG_ACTIVITY_NEW_DOCUMENT or Intent.FLAG_ACTIVITY_MULTIPLE_TASK
+            }
+    }
+}