Why following code shows setVideoSource failed exception

Question

 MediaRecorder mr=new MediaRecorder();   
 mr.setVideoSource(MediaRecorder.VideoSource.CAMERA);

Answer 1

I suggest you first try adding a couple uses-permissions to you AndroidManifest.xml:

<uses-permission android:name="android.permission.RECORD_VIDEO" />
<uses-permission android:name="android.permission.CAMERA" />