AnimationDrawable 在Dialog中不能动画的原因

原来在dialog的onCreate onStart调用的时候UI还没出来 这时候调用动画是不会运行的。

解决办法可以看这里。

http://googlers.iteye.com/blog/907136
其实也就是加一个handler, 让它延时去做

下面是我的LoadingDialog

package com.example;

import android.app.Dialog;
import android.content.Context;
import android.graphics.BitmapFactory;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.view.Window;
import android.view.animation.Animation;
import android.widget.ImageView;

/**
 * Created by IntelliJ IDEA.
 * User: denny
 * Date: 11-9-27
 * Time: 下午3:21
 * To change this template use File | Settings | File Templates.
 */
public class LoadingDialog extends Dialog{

    private Handler handler = new Handler();
    private ImageView iv;
    private AnimationDrawable ad;

    public LoadingDialog(Context context) {
        super(context, android.R.style.Theme_Translucent_NoTitleBar);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.loading_dialog);
        iv = (ImageView) findViewById(R.id.loadingImg);
        iv.setBackgroundResource(R.drawable.loading);
        ad = (AnimationDrawable) iv.getBackground();
    }

    @Override
    public void show() {
        super.show();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                ad.start();
            }
        }, 50);
    }

    @Override
    public void dismiss() {
        super.dismiss();
        ad.stop();
    }
}