title: NullPointerException : println needs a message in android
body: <p>in my media player i play a song from sdcard. it shows error as NullPointerException : println needs a message  e in android. i tried long time but i do not know the reason .please assist me.</p>
  
  <p>code:</p>
  
  <pre><code>    try {
          mediaPlayer = new  MediaPlayer();
          mediaPlayer.setDataSource("/sdcard/t1.mp3");
          seek.setMax(mediaPlayer.getDuration());
          mediaPlayer.prepare();
          mediaPlayer.start();
          mediaPlayer.setOnCompletionListener(this);          
      }
      catch(Exception ex){
          Log.e("sdcard-err2:",ex.getMessage());  //  null pointer exception : println needs a message 
      }  
  </code></pre>
  
  <p>Log cat:</p>
  
  <pre><code>     05-16 19:27:54.491: ERROR/AndroidRuntime(6889): Caused by: java.lang.NullPointerException: println needs a message
       05-16 19:27:54.491: ERROR/AndroidRuntime(6889):     at android.util.Log.println(Native Method)
       05-16 19:27:54.491: ERROR/AndroidRuntime(6889):     at android.util.Log.e(Log.java:208)
       05-16 19:27:54.491: ERROR/AndroidRuntime(6889):     at com.seek.bar.media3.onCreate(media3.java:43)
       05-16 19:27:54.491: ERROR/AndroidRuntime(6889):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
       05-16 19:27:54.491: ERROR/AndroidRuntime(6889):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
       05-16 19:27:54.491: ERROR/AndroidRuntime(6889):     ... 11 more
  </code></pre>