AndEngine弹出场景错误

Question

我正在制作一个破砖机游戏，我想在球击中地面时显示弹出窗口。但是，我尝试设置子场景或将弹出窗口设为对象并将其添加为实体。两种方法都有相同的错误如下所示。

有人可以给我任何建议吗？

谢谢！

public Scene onLoadScene() {
        this.mEngine.registerUpdateHandler(new FPSLogger());
        scene.registerUpdateHandler(new IUpdateHandler() {
        public void reset() { }

        public void onUpdate(final float pSecondsElapsed) {
                if(ball.collidesWith(paddle)) {
                    ball.bounceWithRectangle(paddle);
                }
                else if (ball.getY() >= Game.getCAMERA_HEIGHT() - 30) {
                    scene.setBackground(new ColorBackground(255f, 0f, 0f));
                    scene.setIgnoreUpdate(true);
                    **scene.setChildScene(pauseScene(), false, true, true);
                    //scene.getTopLayer().addEntity(popup);**
                }
}

更新了pauseScene（）：

public Scene pauseScene() {
    Scene pauseScene = new Scene(1);
    Texture mTexture = new Texture(256, 256, TextureOptions.BILINEAR);
    TextureRegionFactory.setAssetBasePath("popup/");
    TextureRegion textTextRegion = TextureRegionFactory.createFromAsset(mTexture, this, "canvas.jpg", 0, 0);
    Sprite box = new Sprite(0, 0, textTextRegion);
    pauseScene.getTopLayer().addEntity(box);
    return pauseScene;
}

=============================================== ============= 其他尝试：

public Dialog onCreateDialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this.getApplicationContext());
    builder.setMessage("Hello");
    AlertDialog alert = builder.create();
    return alert;
}