videoview - Android E/ExtMediaPlayer-JNI: env->IsInstanceOf fails E/MediaPlayer-JNI: JNIMediaPlayerFactory: bIsQCMediaPlayerPresent 0 -

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i trying play video song in app video-view. nothing except black screen, , display error 'can't play video'.it seems there no errors such in code except log cat errors have never heard of.

videoview videoview =(videoview)findviewbyid(r.id.video_view_ex);      mediacontroller mediacontroller= new mediacontroller(this);     mediacontroller.setanchorview(videoview);      uri uri= uri.parse(environment.getexternalstoragedirectory().getpath()+"/memory card/video/na na na na -dj 9dip.mp4");     videoview.setmediacontroller(mediacontroller);     videoview.setvideouri(uri);     videoview.requestfocus();     videoview.start();





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