Added support of PiP

app/src/main/java/org/linphone/ui/voip/VoipActivity.kt

@@ -19,6 +19,8 @@
  */
 package org.linphone.ui.voip
 
+import android.app.PictureInPictureParams
+import android.content.pm.PackageManager
 import android.os.Bundle
 import android.view.ViewGroup
 import androidx.annotation.DrawableRes
@@ -103,6 +105,7 @@ class VoipActivity : AppCompatActivity() {
         callViewModel = run {
             ViewModelProvider(this)[CurrentCallViewModel::class.java]
         }
+        binding.callViewModel = callViewModel
 
         callViewModel.showAudioDevicesListEvent.observe(this) {
             it.consume { devices ->
@@ -172,6 +175,43 @@ class VoipActivity : AppCompatActivity() {
         }
     }
 
+    override fun onResume() {
+        super.onResume()
+
+        val isInPipMode = isInPictureInPictureMode
+        if (::callViewModel.isInitialized) {
+            Log.i("$TAG onResume: is in PiP mode? $isInPipMode")
+            callViewModel.pipMode.value = isInPipMode
+        }
+    }
+
+    override fun onUserLeaveHint() {
+        super.onUserLeaveHint()
+
+        if (::callViewModel.isInitialized && callViewModel.isVideoEnabled.value == true) {
+            Log.i("$TAG User leave hint, entering PiP mode")
+            val supportsPip = packageManager.hasSystemFeature(
+                PackageManager.FEATURE_PICTURE_IN_PICTURE
+            )
+            Log.i("$TAG Is PiP supported: $supportsPip")
+            if (supportsPip) {
+                val params = PictureInPictureParams.Builder()
+                    .setAspectRatio(AppUtils.getPipRatio(this))
+                    .build()
+                try {
+                    if (!enterPictureInPictureMode(params)) {
+                        Log.e("$TAG Failed to enter PiP mode")
+                        callViewModel.pipMode.value = false
+                    } else {
+                        Log.i("$TAG Entered PiP mode")
+                    }
+                } catch (e: Exception) {
+                    Log.e("$TAG Can't build PiP params: $e")
+                }
+            }
+        }
+    }
+
     private fun updateCurrentLayout(newLayoutInfo: WindowLayoutInfo) {
         if (newLayoutInfo.displayFeatures.isNotEmpty()) {
             for (feature in newLayoutInfo.displayFeatures) {

app/src/main/java/org/linphone/ui/voip/viewmodel/CurrentCallViewModel.kt

@@ -67,6 +67,8 @@ class CurrentCallViewModel @UiThread constructor() : ViewModel() {
 
     val fullScreenMode = MutableLiveData<Boolean>()
 
+    val pipMode = MutableLiveData<Boolean>()
+
     // To synchronize chronometers in UI
     val callDuration = MutableLiveData<Int>()
 

app/src/main/java/org/linphone/utils/AppUtils.kt

@@ -19,7 +19,10 @@
  */
 package org.linphone.utils
 
+import android.app.Activity
 import android.content.Context
+import android.util.DisplayMetrics
+import android.util.Rational
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -50,6 +53,42 @@ class AppUtils {
             return coreContext.context.getString(id, args)
         }
 
+        @MainThread
+        fun getPipRatio(
+            activity: Activity,
+            forcePortrait: Boolean = false,
+            forceLandscape: Boolean = false
+        ): Rational {
+            val displayMetrics = DisplayMetrics()
+            activity.windowManager.defaultDisplay.getMetrics(displayMetrics)
+            var height = displayMetrics.heightPixels
+            var width = displayMetrics.widthPixels
+
+            val aspectRatio = width / height
+            if (aspectRatio < 1 / 2.39) {
+                height = 2.39.toInt()
+                width = 1
+            } else if (aspectRatio > 2.39) {
+                width = 2.39.toInt()
+                height = 1
+            }
+
+            val ratio = if (width > height) {
+                if (forcePortrait) {
+                    Rational(height, width)
+                } else {
+                    Rational(width, height)
+                }
+            } else {
+                if (forceLandscape) {
+                    Rational(height, width)
+                } else {
+                    Rational(width, height)
+                }
+            }
+            return ratio
+        }
+
         @MainThread
         fun getRedToast(
             context: Context,

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

@@ -113,13 +113,19 @@
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintStart_toStartOf="parent"/>
 
+            <androidx.constraintlayout.widget.Group
+                android:id="@+id/header_info_visibility"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:visibility="@{viewModel.fullScreenMode || viewModel.pipMode ? View.INVISIBLE : View.VISIBLE}"
+                app:constraint_referenced_ids="call_direction_icon, call_direction_label, separator, chronometer" />
+
             <ImageView
                 android:id="@+id/call_direction_icon"
                 android:layout_width="@dimen/icon_size"
                 android:layout_height="@dimen/icon_size"
                 android:layout_marginStart="10dp"
                 android:adjustViewBounds="true"
-                android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
                 android:src="@{viewModel.isOutgoing ? @drawable/outgoing_call : @drawable/incoming_call, default=@drawable/outgoing_call}"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toTopOf="@id/call_direction_label"
@@ -133,7 +139,6 @@
                 android:layout_marginStart="10dp"
                 android:layout_marginTop="10dp"
                 android:layout_marginBottom="10dp"
-                android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
                 android:text="@{viewModel.isOutgoing ? @string/call_outgoing : @string/call_incoming, default=@string/call_outgoing}"
                 android:textColor="@color/white"
                 android:textSize="16sp"
@@ -150,7 +155,6 @@
                 android:textColor="@color/white"
                 android:textSize="16sp"
                 android:text="@string/vertical_separator"
-                android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
                 app:layout_constraintStart_toEndOf="@id/call_direction_label"
                 app:layout_constraintTop_toTopOf="@id/call_direction_label"
                 app:layout_constraintBottom_toBottomOf="@id/call_direction_label"/>
@@ -163,7 +167,6 @@
                 android:layout_marginStart="5dp"
                 android:textColor="@color/white"
                 android:textSize="16sp"
-                android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
                 app:layout_constraintStart_toEndOf="@id/separator"
                 app:layout_constraintTop_toTopOf="@id/call_direction_label"
                 app:layout_constraintBottom_toBottomOf="@id/call_direction_label"/>
@@ -176,7 +179,7 @@
                 android:padding="5dp"
                 android:layout_marginEnd="10dp"
                 android:src="@drawable/camera_rotate"
-                android:visibility="@{!viewModel.fullScreenMode &amp;&amp; viewModel.isVideoEnabled &amp;&amp; viewModel.showSwitchCamera ? View.VISIBLE : View.GONE}"
+                android:visibility="@{!viewModel.fullScreenMode &amp;&amp; !viewModel.pipMode &amp;&amp; viewModel.isVideoEnabled &amp;&amp; viewModel.showSwitchCamera ? View.VISIBLE : View.GONE}"
                 app:tint="@color/white"
                 app:layout_constraintTop_toTopOf="@id/call_direction_label"
                 app:layout_constraintBottom_toBottomOf="@id/call_direction_label"
@@ -200,7 +203,7 @@
 
         <include
             android:id="@+id/bottom_bar"
-            android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
+            android:visibility="@{viewModel.fullScreenMode || viewModel.pipMode ? View.INVISIBLE : View.VISIBLE}"
             layout="@layout/voip_call_extra_actions"
             bind:viewModel="@{viewModel}"/>
 

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

@@ -4,6 +4,10 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <data>
+        <import type="android.view.View" />
+        <variable
+            name="callViewModel"
+            type="org.linphone.ui.voip.viewmodel.CurrentCallViewModel" />
     </data>
 
     <androidx.coordinatorlayout.widget.CoordinatorLayout
@@ -26,6 +30,7 @@
 
             <LinearLayout
                 android:id="@+id/toasts_area"
+                android:visibility="@{callViewModel.pipMode ? View.INVISIBLE : View.VISIBLE}"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:orientation="vertical"