java - 动画结束后如何开始新的 Activity ？

Question

我是 Android 的新手，我找不到关于如何在动画端启动新 Activity 的线程。

这是我的代码:

public class Intro extends Activity {

    AnimationDrawable anim = new AnimationDrawable();

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.intro);
        ImageView iv =(ImageView) findViewById(R.id.imageView1);          
        iv.setBackgroundResource(R.anim.animation);    
        anim = (AnimationDrawable) iv.getBackground(); 

        iv.post(new Runnable(){    
            public void run(){    
                anim.start();        
        }

        });

    }

}

Answer 1

据我所知，没有回调机制可以确定 AnimationDrawable 何时完成迭代。你可以做的是查询帧数和每帧的延迟。总结一下，并在该持续时间内延迟发布。在该回调中，您可以开始第二个 Activity 。

请注意，按照您的方式启动动画有点危险。 docs说:

It's important to note that the start() method called on the AnimationDrawable cannot be called during the onCreate() method of your Activity, because the AnimationDrawable is not yet fully attached to the window. If you want to play the animation immediately, without requiring interaction, then you might want to call it from the onWindowFocusChanged() method in your Activity, which will get called when Android brings your window into focus.