M.A.Murali M.A.Murali - 5 months ago 62
Android Question

NullPointerException : println needs a message in android

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.

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
}


Log cat:

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

Answer

In the catch, use:

String err = (ex.getMessage()==null)?"SD Card failed":ex.getMessage();
Log.e("sdcard-err2:",err);  
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