title: Playing video using MediaPlayer class
body: <p>I am trying to make use of <code>MediaPlayer</code> class for playing a video file. The problem is video is not getting displayed at all though I can hear the sound in the video playing.</p>
  
  <p>Following is the code of activity</p>
  
  <pre><code>public class MainActivity extends Activity implements OnClickListener {
  
  private SurfaceView surfaceView;
  private Button btnPlay;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      init();
      addListener();
  
  }
  
  private void init() {
      // TODO Auto-generated method stub
      surfaceView = (SurfaceView) findViewById(R.id.surfaceView1);
      btnPlay = (Button) findViewById(R.id.btnPlay);
  }
  
  private void addListener() {
      // TODO Auto-generated method stub
  
      btnPlay.setOnClickListener(this);
  }
  
  MediaPlayer mediaPlayer = null;
  
  @Override
  public void onClick(View v) {
      // TODO Auto-generated method stub
      switch (v.getId()) {
      case R.id.btnPlay:
          try{
          if (mediaPlayer != null) {
              mediaPlayer.reset();
              mediaPlayer.release();
          }else{
          getWindow().setFormat(PixelFormat.UNKNOWN);
          MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.wildlife);
          SurfaceHolder surfaceHolder = surfaceView.getHolder();
  
          surfaceHolder.setFixedSize(176, 144);
          surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
          mediaPlayer.setDisplay(surfaceHolder);
          mediaPlayer.start();}
          }catch (Exception e) {
              Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
          }
          break;
  
      default:
          break;
      }
    }
     }
  </code></pre>
  
  <p>Following is the code of layout xml</p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity" &gt;
  
  &lt;SurfaceView
      android:id="@+id/surfaceView1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true"
      android:layout_alignParentLeft="true"
      android:layout_alignParentRight="true"
      android:layout_alignParentTop="true" /&gt;
  
  &lt;Button
      android:id="@+id/btnPlay"
      style="?android:attr/buttonStyleSmall"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignRight="@+id/surfaceView1"
      android:layout_alignTop="@+id/surfaceView1"
      android:text="@string/play" /&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>please tell me what needs to be done?
  Thanks in advance.</p>