我正在使用Andengine Live壁纸扩展制作livewallpaper。问题是当我尝试在OnCreateScene方法中附加精灵(背景图像)时,我得到一个空指针异常。有人可以帮我这个吗?
以下是我的代码: -
@Override
public EngineOptions onCreateEngineOptions() {
this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
EngineOptions engineOptions = new EngineOptions(false, ScreenOrientation.PORTRAIT_FIXED, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), mCamera);
return engineOptions;
}
@Override
public void onCreateResources(
OnCreateResourcesCallback rsrCallback)
throws Exception {
BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");
background = new BitmapTextureAtlas(this.getTextureManager(), 480, 320);
backTR = BitmapTextureAtlasTextureRegionFactory.createFromAsset(background,this.getAssets(), "background_small.png", 0, 0);
background.load();
rsrCallback.onCreateResourcesFinished();
}
@Override
public void onCreateScene(OnCreateSceneCallback sceneCallback)
throws Exception {
// creating main scene
mMainScene = new Scene();
IBackground myBack = new Background(0.0f, 0.0f, 0.0f);
mMainScene.setBackground(myBack);
final Sprite bkground = new Sprite(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT, backTR, getVertexBufferObjectManager());
mMainScene.getLastChild().attachChild(bkground);
sceneCallback.onCreateSceneFinished(mMainScene);
}
在线上mMainScene.getLastChild()。attachChild(bkground),我得到一个空指针。堆栈跟踪已附加。
答案 0 :(得分:2)
我找到了另一种向壁纸添加精灵背景的解决方案。
使用SpriteBackground类: -
mMainScene.setBackground(new SpriteBackground(new Sprite(0, 0, backTR, this.getVertexBufferObjectManager())));
这解决了我之前得到的空指针。