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我一直在使用 HaxeFlixel 和 OpenFL 2.1.3 编写的针对 Android 的游戏遇到问题。游戏随机崩溃，有时在开始后不久，有时在几分钟后，并立即关闭应用程序，没有任何消息或明显的错误。无论出于何种原因，我在调试附加了 IDE 的应用程序时遇到了困难，因此我在设备上运行它时附加了 logcat，并将其范围缩小到以下跟踪：

I/trace   ( 8505): Lib.hx:324: Null Object Reference
I/trace   ( 8505): Called from openfl._v2.display.Stage.__render (openfl/_v2/display/Stage.hx line 1035)
I/trace   ( 8505): Called from openfl._v2.display.DisplayObjectContainer.__broadcast (openfl/_v2/display/DisplayObjectContainer.hx line 280)
I/trace   ( 8505): Called from openfl._v2.display.DisplayObject.__broadcast (openfl/_v2/display/DisplayObject.hx line 174)
I/trace   ( 8505): Called from openfl._v2.display.DisplayObject.__dispatchEvent (openfl/_v2/display/DisplayObject.hx line 195)
I/trace   ( 8505): Called from openfl._v2.events.EventDispatcher.dispatchEvent (openfl/_v2/events/EventDispatcher.hx line 100)
I/trace   ( 8505): Called from openfl._v2.events.Listener.dispatchEvent (openfl/_v2/events/EventDispatcher.hx line 270)
I/trace   ( 8505): Called from flixel.FlxGame.onEnterFrame (flixel/FlxGame.hx line 493)
I/trace   ( 8505): Called from flixel.FlxGame.step (flixel/FlxGame.hx line 648)
I/trace   ( 8505): Called from flixel.FlxGame.update (flixel/FlxGame.hx line 696)
I/trace   ( 8505): Called from flixel.system.frontEnds.SoundFrontEnd.update (flixel/system/frontEnds/SoundFrontEnd.hx line 278)
I/trace   ( 8505): Called from flixel.group.FlxTypedGroup.update (flixel/grou
I/WindowState(  467): WIN DEATH: Window{2b71e64d u0 com.al.shb/com.al.shb.MainActivity}
W/WindowManager(  467): Force-removing child win Window{d7de13 u0 SurfaceView} from container Window{2b71e64d u0 com.al.shb/com.al.shb.MainActivity}
W/WindowManager(  467): Failed looking up window
W/WindowManager(  467): java.lang.IllegalArgumentException: Requested window android.os.BinderProxy@2038b502 does not exist
W/WindowManager(  467):     at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:8539)
W/WindowManager(  467):     at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:8530)
W/WindowManager(  467):     at com.android.server.wm.WindowState$DeathRecipient.binderDied(WindowState.java:1142)
W/WindowManager(  467):     at android.os.BinderProxy.sendDeathNotice(Binder.java:551)
I/WindowState(  467): WIN DEATH: null
I/InputDispatcher(  467): Dropping event because there is no touchable window at (87, 430).
I/Zygote  (  130): Process 8505 exited cleanly (1)
I/ActivityManager(  467): Process com.al.shb (pid 8505) has died
W/ActivityManager(  467): Force removing ActivityRecord{3f0e8887 u0 com.al.shb/.MainActivity t13}: app died, no saved state

SoundFrontEnd/FlxTypedGroup表明这是游戏内音效组的问题。声音似乎可以正常播放并编码为 .ogg 文件。当它特别尝试播放任何声音时，它并没有崩溃，它更像是随机发生的。

我按照 HaxeFlixel 的建议缓存了 Android 目标的声音，但我将它们缓存init()在我的 Main 类中，这应该不是问题：

private function setupGame():Void
{
    var stageWidth:Int = Lib.current.stage.stageWidth;
    var stageHeight:Int = Lib.current.stage.stageHeight;

    if (zoom == -1)
    {
        var ratioX:Float = stageWidth / gameWidth;
        var ratioY:Float = stageHeight / gameHeight;
        zoom = Math.min(ratioX, ratioY);
        gameWidth = Math.ceil(stageWidth / zoom);
        gameHeight = Math.ceil(stageHeight / zoom);
    }

    #if android
    FlxG.sound.cache("button");
    FlxG.sound.cache("t1");
    FlxG.sound.cache("t2");
    FlxG.sound.cache("fx");
    #end

    addChild(new FlxGame(gameWidth, gameHeight, initialState, zoom, framerate, framerate, skipSplash, startFullscreen));
}

它们使用FlxG.sound.play("button").

我还查看了 OpenFLLib.hx以检查Null Object Reference，这似乎是以下方法中底部代码块的问题，但我怀疑这是一个红鲱鱼：

public static function rethrow (error:Dynamic):Void {   
    var event = new UncaughtErrorEvent (UncaughtErrorEvent.UNCAUGHT_ERROR, true, true, error);

    if (__uncaughtExceptionHandler != null && __uncaughtExceptionHandler (event)) {
        return;
    }

    Lib.current.loaderInfo.uncaughtErrorEvents.dispatchEvent (event);   

    if (!event.__getIsCancelled ()) {
        var message = "";
        if (error != null && error != "") {
            message = error + "";
        }

        var stack = CallStack.exceptionStack ();
        if (stack.length > 0) {
            message += CallStack.toString (stack) + "\n";
        } else {
            message += "\n";
        }

        #if (mobile && !ios)
        trace (message);
        #else
        Sys.stderr ().write (Bytes.ofString (message));
        #end
        Sys.exit (1);
    }
}

值得注意的是，如果我以 Flash 或 Windows 为目标，则完全没有问题，只有在以 Android 为目标时。不同之处在于 Flash 和 Windows 使用mp3编码文件，而 Android 使用ogg.

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