AnimationDrawable不改变帧

Question

一段时间以来，我一直对"AnimationDrawable不更改框架“的问题感到困惑，我已经确认我已经将所需的所有框架添加到AnimationDrawable对象中，并且我已经调用了isRunning()，而我调用的结果是isRunning()，但是AnimationDrawable不能更改该框架。

我在MainActivity的处理程序中调用start()，而不是在onCreate()或onResume()中调用，尽管调用的start()处于onResume()状态。

谢谢你的思考。

增加了有问题的代码。

public class MainActivity extends Activity{

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ma = new Ma(this);
        ablt = ma.ablt;
        setContentView(ablt);

        mt = new MinorThread(this);
        new Thread(mt).start();

        while(true){
            if(mt.mHandler==null) continue;
            else{
                Message msg = new Message();
                mt.mHandler.sendMessage(msg);
                break;
            }
        }
    }

    Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            ma.control();
            Message msg1 = new Message();
            mt.mHandler.sendMessage(msg1);
        }
    };

    @Override
    public boolean onKeyDown(int keyCode,KeyEvent event){
        switch(keyCode){
        case KeyEvent.KEYCODE_BACK:
            System.exit(0);
        }
        return true;
    }

    private MinorThread mt = null;
    private ImageView v1 = null;
    private Ma ma = null;
    private int x = 0;
    private int y = 0;
    private int width = 0;
    private int height = 0;
    private AbsoluteLayout ablt = null;
}

    class MinorThread implements Runnable{

   @Override
    public void run() {

       Looper.prepare();
       mHandler = new Handler(){
           @Override
           public void handleMessage(Message msg){
               Message msg2 = new Message();
               mainActivity.handler.sendMessage(msg2);
               try {
                   Thread.sleep(3000);
               } catch (InterruptedException e) {
                   e.printStackTrace();
               }
           }
       };
       Looper.loop();
   }

   public MinorThread(MainActivity mainAcitivy){
       this.mainActivity = mainAcitivy;
   }

   private MainActivity mainActivity = null;
   public Handler mHandler = null;
}

    class Ma{

public Ma(MainActivity context){

        ablt = new AbsoluteLayout(context);
        TestView v = new TestView(context);
        AbsoluteLayout.LayoutParams lp = new LayoutParams(480,320,0,0);
        ablt.addView(v, lp);
        Drawable d = null;


        ad = new AnimationDrawable();
        d = context.getResources().getDrawable(R.drawable.f1);
        ad.addFrame(d, 100); d = context.getResources().getDrawable(R.drawable.f2);
        ad.addFrame(d, 100); d = context.getResources().getDrawable(R.drawable.f3);
        ad.addFrame(d, 100); d = context.getResources().getDrawable(R.drawable.f4);
        ad.addFrame(d, 100); d = context.getResources().getDrawable(R.drawable.f5);
        ad.addFrame(d, 100); 

        v1 = new ImageView(context);
        v1.setImageDrawable(ad);

        String tag = "test";
        v1.setTag(tag);

        ablt.addView(v1, new LayoutParams(100, 40, 20, 20));
    }

    public void control(){

        v1 = (ImageView) ablt.findViewWithTag("test");
        if(x<480&&y<320){
            x+=10;
            y+=5;
            v1.layout(x, y, x+100, y+40);
            AnimationDrawable ad = (AnimationDrawable)v1.getDrawable();
            ad.start();
        }
    }

    public AbsoluteLayout ablt = null;
    private AnimationDrawable ad = null;
    private ImageView v1 = null;
    private int x = 0;
    private int y = 0;
    private int width = 0;
    private int height = 0;
}


    class TestView extends View{

    public TestView(Context context) {
        super(context);
    }

    @Override
    public void onDraw(Canvas canvas){
        paint.setColor(Color.WHITE);
        canvas.drawRect(0,0,480,320, paint);
    }

    private Paint paint = new Paint();
}

我很抱歉没有上传这些帧，因为我的声誉不到10。如果你执行代码，你需要找到一些图片让动画运行。

谢谢。

=============================

现在，我知道如何让结果显示，但我不知道结果.

问题的解决方案是在显示所有ImageView之前向布局对象中添加一个ImageView对象，并且“添加一个ImageView.”“显示所有ImageView”不能在function.The右方法中处理，这类似于“if(.){add a ImageView}if{show the all ImageView}".。

虽然可以解决我困惑的问题，但是为什么安卓不能第一次显示所有图像视图的动画呢？

Answer 1

当焦点为真时，尝试在start()中使用onWindowFocusChange(boolean focus)。