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快速提问:我有这个代码:

public EngineOptions onCreateEngineOptions() {
    instance = this;

    mCamera = new org.andengine.engine.camera.Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);

    EngineOptions engineOptions = new EngineOptions(true, ScreenOrientation.LANDSCAPE_SENSOR, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), mCamera);
    engineOptions.getAudioOptions().setNeedsSound(true);
    //engineOptions.getAudioOptions().setNeedsMusic(true);


    return engineOptions;

}

protected void onCreateResources() {





    SoundFactory.setAssetBasePath("mfx/");



    try {
        this.testSound = SoundFactory.createSoundFromAsset(this.mEngine.getSoundManager(), this, "explosion.ogg");
    } catch (final IOException e) {
        Debug.e(e);
    }
}

我最后在另一个有这个活动的班级上玩它:

    activity.mCurrentScene.registerTouchArea(image);
    activity.mCurrentScene.setOnAreaTouchListener(new IOnAreaTouchListener() {

        @Override
        public boolean onAreaTouched(TouchEvent pSceneTouchEvent,
                ITouchArea pTouchArea, float pTouchAreaLocalX,
                float pTouchAreaLocalY) {
            Zancudo.this.activity.testSound.play();
            return false;
        }
    });

任何想法为什么我得到一个空指针异常?

谢谢!

4

1 回答 1

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对于您正在使用的播放声音,如下所示

Zancudo.this.activity.testSound.play();

这看起来像问题,因为这里的活动对象没有在Zancudo类中实例化。

要访问 testSound,您需要获取Zancudo活动的实例。

于 2012-08-22T06:32:13.457 回答