I have encountered a problem in which when ever I use
final MediaPlayer tick = MediaPlayer.create(getApplicationContext(), R.raw.tick);
tick.start();// tick is a short .mp3 file
in my app, no matter where, I get:
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.start()' on a null object reference
at com.a.aar.MainActivity.onClicks(MainActivity.java:123)
at com.a.aar.MainActivity$2.onClick(MainActivity.java:97)
at android.view.View.performClick(View.java:5204)
at android.view.View$PerformClick.run(View.java:21153)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
But, whenever I use a slightly shorter sound effect, the app runs great.(I need a short sound because I want a lot of sounds coming fast and so the sounds will not stop)
What is the reason to this error and how can I solve it?