feat(video_calls): added system android pip for calls

android/app/src/main/AndroidManifest.xml

@@ -37,6 +37,7 @@
             android:name=".MainActivity"
             android:exported="true"
             android:launchMode="singleTop"
+            android:supportsPictureInPicture="true"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"

android/app/src/main/kotlin/com/eatvioapp/app/MainActivity.kt

@@ -1,8 +1,11 @@
 package com.eatvioapp.app
 
+import android.app.PictureInPictureParams
 import android.content.Intent
 import android.content.pm.ApplicationInfo
 import android.content.pm.PackageManager
+import android.os.Build
+import android.util.Rational
 import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.MethodChannel
@@ -21,7 +24,10 @@ class MainActivity: FlutterActivity() {
     }
 
     private val channelName = "com.eatvioapp/hms_push"
+    private val videoCallPipChannelName = "com.eatvioapp/video_call_pip"
     private var methodChannel: MethodChannel? = null
+    private var videoCallPipChannel: MethodChannel? = null
+    private var videoCallPipEnabled: Boolean = false
 
     override fun onResume() {
         super.onResume()
@@ -37,6 +43,16 @@ class MainActivity: FlutterActivity() {
         super.configureFlutterEngine(flutterEngine)
 
         methodChannel = MethodChannel(flutterEngine.dartExecutor.binaryMessenger, channelName)
+        videoCallPipChannel = MethodChannel(flutterEngine.dartExecutor.binaryMessenger, videoCallPipChannelName)
+        videoCallPipChannel?.setMethodCallHandler { call, result ->
+            when (call.method) {
+                "setPipEnabled" -> {
+                    videoCallPipEnabled = call.arguments as? Boolean ?: false
+                    result.success(null)
+                }
+                else -> result.notImplemented()
+            }
+        }
         methodChannel?.setMethodCallHandler { call, result ->
                 when (call.method) {
                     "getHuaweiToken" -> {
@@ -94,6 +110,12 @@ class MainActivity: FlutterActivity() {
         handleIntentForActionUrl(intent)
     }
 
+    override fun onUserLeaveHint() {
+        super.onUserLeaveHint()
+        enterVideoCallPictureInPictureIfNeeded()
+        videoCallPipChannel?.invokeMethod("onUserLeaveHint", null)
+    }
+
     override fun onNewIntent(intent: Intent) {
         super.onNewIntent(intent)
         // Обработка нового интента, когда Activity уже запущена (тап по уведомлению).
@@ -122,4 +144,19 @@ class MainActivity: FlutterActivity() {
         // Проксируем URL во Flutter, где уже есть общая логика навигации по диплинкам.
         methodChannel?.invokeMethod("openActionUrl", actionUrl)
     }
+
+    private fun enterVideoCallPictureInPictureIfNeeded() {
+        if (!videoCallPipEnabled) return
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
+        if (isInPictureInPictureMode) return
+
+        try {
+            val params = PictureInPictureParams.Builder()
+                .setAspectRatio(Rational(2, 3))
+                .build()
+            enterPictureInPictureMode(params)
+        } catch (e: Exception) {
+            android.util.Log.w("VideoCallPiP", "Unable to enter PiP from onUserLeaveHint", e)
+        }
+    }
 }