Question

我正试图在游戏结束时运行一个简单的按钮动画我有以下课程：
GameView
GameThread

public class GameView extends SurfaceView implements SurfaceHolder.Callback {
boolean gameover;GameThread gamethread;

public GameView(Context context, AttributeSet attrs) {
    super(context, attrs);
    gameover=true;


    getHolder().addCallback(this); // adding the callback (this) to the surface holder to intercept events

    setFocusable(true);// make the GamePanel focusable so it can handle events

}






@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {

    Log.d("TAG", "surface changed");
}

@Override
public void surfaceCreated(SurfaceHolder holder) {


            gamethread=new GameThread(getHolder(),this);
            gamethread.setrunning(true);
            gamethread.start();






}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    boolean retry=true;
    Log.d("TAG", "Surface destroyed entered");



    while(retry){
    try {
        gamethread.setrunning(false);
        gamethread.join();
        gamethread=null;
        Log.d("tag","thread is destroyed" );
        if(gamethread==null){
            Log.d("tag","thread is destroyed and null" );

        }
        retry=false;
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    }//end while
}//end method




public void update(){



    if(gameover){


        Button gameover_button = (Button) findViewById(R.id.gameover);
        Animation animation = AnimationUtils.loadAnimation(getContext(), R.anim.gameoveranimation);
        gameover_button.startAnimation(animation);

}

}//end update`

public class GameThread extends Thread  {
// desired fps


private boolean running;
private SurfaceHolder surfaceholder;
private GameView gameview;

public GameThread(SurfaceHolder surfaceHolder, GameView gameview){
    this.gameview=gameview;
    this.surfaceholder=surfaceHolder; //we need the surfaceholder since we need to lock surface before drawing

}
public void setrunning(boolean running){

    this.running=running;
}

@Override
public void run(){
    super.run();
    Canvas canvas;




        while(running){

        canvas=null;


        canvas = this.surfaceholder.lockCanvas();
        synchronized (surfaceholder) {
            if(canvas!=null){
                canvas.drawColor(Color.BLACK);
            this.gameview.Draw1(canvas);

            this.gameview.update();

            }//end if







            }
        }

        }finally{//in case of an exception
            if(canvas!=null){
            surfaceholder.unlockCanvasAndPost(canvas);
            }
                }//end finally
                        }//end loop


                        }//end run

}

<br>

除了gameview类的更新方法中的动画外，一切正常动画在oncreate方法中运行正常我知道我的问题与线程有关，但我对它们了解不多。

thx提前

`

Answer 1

如果您的问题是需要在UI线程上调用update，那么您可以使用：

Handler handler = new Handler(Looper.getMainLooper());
handler.post(new Runnable() {
    @Override
    public void run() {
        this.gameview.update();
    }
});

此外，看起来您正在寻找游戏结束按钮作为表面视图的孩子。如果这不正确，您可以找到相对于父活动的视图。

Activity activity = (Activity) getContext();
Button gameover_button = (Button) activity.findViewById(R.id.gameover);

在线程android上运行动画

1 个答案: