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PONullpointerexception and onPause(): a mystery
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  1. PONullpointerexception and onPause(): a mystery
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    copied!<p>I'm writing a game on Android and this issue has stumped me. I overrode onPause() to enable the game to save its data to internal storage when it is not visible anymore. It works correctly until three or four times of pressing back or home. I get this instead:</p> <pre><code>Thread [&lt;1&gt; main] (Suspended (exception NullPointerException)) Main.onPause() line: 127 Main(Activity).performPause() line: 3842 Instrumentation.callActivityOnPause(Activity) line: 1190 ActivityThread.performPauseActivity(ActivityThread$ActivityRecord, boolean, boolean) line: 3335 ActivityThread.performPauseActivity(IBinder, boolean, boolean) line: 3305 ActivityThread.handlePauseActivity(IBinder, boolean, boolean, int) line: 3288 ActivityThread.access$2500(ActivityThread, IBinder, boolean, boolean, int) line: 125 BinderProxy(ActivityThread$H).handleMessage(Message) line: 2044 ActivityThread$H(Handler).dispatchMessage(Message) line: 99 Looper.loop() line: 123 ActivityThread.main(String[]) line: 4627 Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method] Method.invoke(Object, Object...) line: 521 ZygoteInit$MethodAndArgsCaller.run() line: 868 ZygoteInit.main(String[]) line: 626 NativeStart.main(String[]) line: not available [native method] </code></pre> <p>The debugger states it blows up on this:</p> <pre><code>@Override public void onPause() { super.onPause(); Data data = game.writeProtoBuf(); // NullPointerException try { //IO stuff </code></pre> <p>writeProtoBuf doesn't actually write anything but is just a method to retrieve the game data and put it into the Data object. The debugger shows that game is null, but I don't see how that is possible when I can interact with the game correctly before closing it down. :/</p>
 

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