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Editorial Team
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Asked: 2026-06-04T20:53:13+00:00

@Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()){ case

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@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()){
    case R.id.upArrow:
        upSound.start();

        En_description.setText("\"Straight Ahead\"");
        break;

    case R.id.downArrow:
        downSound.start();

        En_description.setText("\"Down\"");
        break;

    case R.id.rightArrow:
        rightSound.start();

        En_description.setText("\"Right\"");
        break;

    case R.id.leftArrow:
        leftSound.start();

        En_description.setText("\"Left\"");
        break;
    default: 

    }
}

The code is simple when I press on an arrow it types the direction of it and plays sound
for some reason it works sometime and other times I get a force close HELP
Thanks this is the log 

05-24 17:52:20.384: W/dalvikvm(343): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
05-24 17:52:20.394: E/AndroidRuntime(343): Uncaught handler: thread main exiting due to uncaught exception
05-24 17:52:20.404: E/AndroidRuntime(343): java.lang.NullPointerException
05-24 17:52:20.404: E/AndroidRuntime(343):  at com.aboutera.learnArabic.Directions.onClick(Directions.java:77)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.view.View.performClick(View.java:2364)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.view.View.onTouchEvent(View.java:4179)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.view.View.dispatchTouchEvent(View.java:3709)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
05-24 17:52:20.404: E/AndroidRuntime(343):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
05-24 17:52:20.404: E/AndroidRuntime(343):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
05-24 17:52:20.404: E/AndroidRuntime(343):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.os.Looper.loop(Looper.java:123)
05-24 17:52:20.404: E/AndroidRuntime(343):  at android.app.ActivityThread.main(ActivityThread.java:4363)
05-24 17:52:20.404: E/AndroidRuntime(343):  at java.lang.reflect.Method.invokeNative(Native Method)
05-24 17:52:20.404: E/AndroidRuntime(343):  at java.lang.reflect.Method.invoke(Method.java:521)
05-24 17:52:20.404: E/AndroidRuntime(343):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
05-24 17:52:20.404: E/AndroidRuntime(343):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
05-24 17:52:20.404: E/AndroidRuntime(343):  at dalvik.system.NativeStart.main(Native Method)
05-24 17:52:20.414: I/dalvikvm(343): threadid=7: reacting to signal 3
05-24 17:52:20.414: E/dalvikvm(343): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
05-24 17:52:22.534: I/Process(343): Sending signal. PID: 343 SIG: 9
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1 Answer

  1. Editorial Team

    Check to verify that upSound, downSound, leftSound, rightSound are all initialized(not null) before using them

    if (upSound != null)
  upSound.start();

    do for downSound, leftSound, rightSound also

    You can initialize the sounds on the fly to make sure if the sound is null it gets played anyways..

      if (upSound == null)
     upSound = MediaPlayer.create(Directions.this, R.raw.up_sound);
  upSound.start();

    Additionally, your textView En_description may also be null which could cause this crash as well.
    Make sure wherever you are retrieving En_description (using findViewById) it is completing successfully

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