<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="34dp"
        android:src="@drawable/gameclip" />

</RelativeLayout>

package lesson.my.sudoku;

import java.util.Timer;
import java.util.TimerTask;

import lession.my.sudoku.R;
import android.app.Activity;
import android.graphics.drawable.ClipDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        ImageView imageview = (ImageView) findViewById(R.id.imageView2);
        final ClipDrawable drawable = (ClipDrawable) imageview.getDrawable();
        drawable.setLevel(0);
        final Handler handler = new Handler() {
            //handler类用于与子线程的通信
            public void handleMessage(Message msg) {
                if (msg.what == 0x1233) {
                    //每当受到子线程的信息，就让drawable变化
                    drawable.setLevel(drawable.getLevel() + 200);
                }
            }
        };
        final Timer timer = new Timer();//timer计时器，休眠300ms
        timer.schedule(new TimerTask() {
            public void run() {
                Message msg = new Message();
                msg.what = 0x1233;
                handler.sendMessage(msg);
                if (drawable.getLevel() >= 10000) {
                    timer.cancel();
                }
            }
        }, 0, 300);
    }
}