For some reason my code when I exit crashes my phone... so if I am paused or never start my app and hit the Quit command it crashes but if the app is running and I quit then it exits fine... my question is why and what is the fix...[HIGH]public void onClick(View arg0) { switch (arg0.getId()) { case R.id.retrieve_location_button: showCurrentLocation(); break; case R.id.bTrack: if (isTracking) { pause(); } else { resume(); } break; case R.id.bQuit: quit(); break; private void resume() { isTracking = true; trackbutton.setText("Stop Tracking"); startTracking(); } public void pause() { Log.d(LOG_TAG, "stopTracking()"); isTracking = false; trackbutton.setText("Start Tracking"); locationManager.removeUpdates(locationListener); } private void quit() { pause(); // remove username in prefs LoginInData.prefs.edit().remove("lbsusername").remove("lbspass") .remove("lbsgroup").commit(); finish(); }[/HIGH]
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Apps Exit app properly
- Thread starter dolamite
- Start date
jonbonazza
Android Expert
Can you provide the logcat output when it crashes?
03-01 01:18:07.090: D/LbsGeocodingActivity(281): stopTracking() 03-01 01:18:07.090: D/AndroidRuntime(281): Shutting down VM 03-01 01:18:07.090: W/dalvikvm(281): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 03-01 01:18:07.120: E/AndroidRuntime(281): FATAL EXCEPTION: main 03-01 01:18:07.120: E/AndroidRuntime(281): java.lang.NullPointerException 03-01 01:18:07.120: E/AndroidRuntime(281): at com.javacodegeeks.android.lbs.LbsGeocodingActivity.pause(LbsGeocodingActivity.java:178) 03-01 01:18:07.120: E/AndroidRuntime(281): at com.javacodegeeks.android.lbs.LbsGeocodingActivity.quit(LbsGeocodingActivity.java:196)
03-01 01:18:07.120: E/AndroidRuntime(281): at com.javacodegeeks.android.lbs.LbsGeocodingActivity.onClick(LbsGeocodingActivity.java:131)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.view.View.performClick(View.java:2408)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.view.View$PerformClick.run(View.java:8816)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.os.Handler.handleCallback(Handler.java:587)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.os.Handler.dispatchMessage(Handler.java:92)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.os.Looper.loop(Looper.java:123)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-01 01:18:07.120: E/AndroidRuntime(281): at java.lang.reflect.Method.invokeNative(Native Method)
03-01 01:18:07.120: E/AndroidRuntime(281): at java.lang.reflect.Method.invoke(Method.java:521)
03-01 01:18:07.120: E/AndroidRuntime(281): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-01 01:18:07.120: E/AndroidRuntime(281): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-01 01:18:07.120: E/AndroidRuntime(281): at dalvik.system.NativeStart.main(Native Method)
03-01 01:18:07.120: E/AndroidRuntime(281): at com.javacodegeeks.android.lbs.LbsGeocodingActivity.onClick(LbsGeocodingActivity.java:131)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.view.View.performClick(View.java:2408)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.view.View$PerformClick.run(View.java:8816)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.os.Handler.handleCallback(Handler.java:587)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.os.Handler.dispatchMessage(Handler.java:92)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.os.Looper.loop(Looper.java:123)
03-01 01:18:07.120: E/AndroidRuntime(281): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-01 01:18:07.120: E/AndroidRuntime(281): at java.lang.reflect.Method.invokeNative(Native Method)
03-01 01:18:07.120: E/AndroidRuntime(281): at java.lang.reflect.Method.invoke(Method.java:521)
03-01 01:18:07.120: E/AndroidRuntime(281): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-01 01:18:07.120: E/AndroidRuntime(281): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-01 01:18:07.120: E/AndroidRuntime(281): at dalvik.system.NativeStart.main(Native Method)
jonbonazza
Android Expert
Looks like line 178 in your pause method of LbsGeocodingActivity is resulting in a NullPointerException. If you can't find the reason, post the relevant code and we'll try to help.