Using Picture-in-picture feature with Android O

I have created an android app to check the feature Picture In Picture mode of Android O. But i facing an error while running this application.

setPictureInPictureArgs: Device doesn't support picture-in-picture mode

 java.lang.IllegalStateException: setPictureInPictureArgs: Device doesn't support picture-in-picture mode.
       at android.os.Parcel.readException(Parcel.java:1923)
       at android.os.Parcel.readException(Parcel.java:1861)
       at android.app.IActivityManager$Stub$Proxy.setPictureInPictureArgs(IActivityManager.java:9378)
       at android.app.Activity.setPictureInPictureArgs(Activity.java:1984)
       at com.example.pip.MainActivity.updatePictureInPictureActions(MainActivity.java:156)
       at com.example.pip.MainActivity$2.onMovieStarted(MainActivity.java:101)
       at com.example.pip.widget.MovieView.play(MovieView.java:350)
       at com.example.pip.widget.MovieView$3.onPrepared(MovieView.java:384)
       at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:3170)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:156)
       at android.app.ActivityThread.main(ActivityThread.java:6440)
       at java.lang.reflect.Method.invoke(Native Method)
       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:746)

This issue is no longer reproducible in the stable version of Android O.