Android - 多线程导致应用程序崩溃

Question

嗨，每次我的游戏中有东西被破坏后，我都会创建一个新的爆炸动画对象，这是通过在我的表面 View 线程中使用线程类完成的。在短时间内摧毁多艘船只后，应用程序退出 Activity 。这是为什么？

explosion ex = new explosion(x,y);
ex.start();

和

class explosion extends Thread implements Runnable{

    private long startTime;
    private int num = 0;
    private int x;
    private int y;
    public explosion(int mx, int my){
        x = mx;
        y = my;
        startTime = System.currentTimeMillis();
    }
    public void run(){
        while(num < 3){
            long millis = System.currentTimeMillis();
            canvas.drawBitmap(explosions.get(num),x,y,null);
            if(millis - startTime > 50){
                startTime = System.currentTimeMillis();
                num++;
                Log.d("Explosion","Animate");
            }
        }
        Log.d("Explosion","End Thread");
    }
};

Answer 1

从 developer.android 复制...

Regardless of whether or not you use AsyncTask, always remember these two rules about the single thread model:

-Do not block the UI thread,

-and Make sure that you access the AndroidUI toolkit only on the UI thread.

我相信这条线会让你崩溃......

canvas.drawBitmap(explosions.get(num),x,y,null);

此链接详细介绍了在另一个线程上更新 UI 的步骤:

http://developer.android.com/resources/articles/painless-threading.html