Support Picture in Picture on Oreo+

app/src/main/AndroidManifest.xml

@@ -12,6 +12,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme.NoActionBar"
+        android:fullBackupContent="true"
         tools:ignore="GoogleAppIndexingWarning">
         <activity
             android:name=".MainActivity"
@@ -23,7 +24,9 @@
             </intent-filter>
         </activity>
         <activity android:name=".PlayerActivity"
-            android:configChanges="orientation|screenSize"/>
+            android:supportsPictureInPicture="true"
+            android:configChanges="screenSize|smallestScreenSize|screenLayout|orientation"
+            tools:targetApi="n" />
     </application>
 
 </manifest>

app/src/main/java/net/theoks/customstreams/android/PlayerActivity.kt

@@ -1,8 +1,12 @@
 package net.theoks.customstreams.android
 
+import android.app.PictureInPictureParams
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
+import android.util.Rational
 import android.widget.Toast
+import androidx.annotation.RequiresApi
 import androidx.appcompat.app.AppCompatActivity
 import com.google.android.exoplayer2.SimpleExoPlayer
 import com.google.android.exoplayer2.source.hls.HlsMediaSource
@@ -43,4 +47,14 @@ class PlayerActivity : AppCompatActivity() {
         }
         super.onDestroy()
     }
+
+    @RequiresApi(Build.VERSION_CODES.O)
+    override fun onUserLeaveHint() {
+        if(player.isPlaying) {
+            val paramsBuilder = PictureInPictureParams.Builder()
+            paramsBuilder.setAspectRatio(Rational(16, 9))
+            enterPictureInPictureMode(paramsBuilder.build())
+        }
+    }
+
 }