Android(安卓) ClipDrawable 实现圆形进度条效果

    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
                 
          android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/t1" />
                 
            android:id="@+id/iv_image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/clip_btimap" />
                 

package com.msquirrel.main;
              
import java.util.Timer;
import java.util.TimerTask;
              
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.graphics.drawable.ClipDrawable;
import android.view.Menu;
import android.widget.ImageView;
/**
 *
 * 入口类
 * @author Msquirrel
 *
 */
public class MainActivity extends Activity {
                  
    private ImageView imageView = null;
                  
    @Override
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity_main); 
        imageView = (ImageView)findViewById(R.id.iv_image); 
        //获取图片所显示的ClipDrawble对象 
        final ClipDrawable drawable = (ClipDrawable)imageView.getDrawable(); 
        final Handler handler = new Handler() 
        { 
            public void handleMessage(Message msg) 
            { 
                if(msg.what == 0x1233) 
                { 
                    if(drawable.getLevel() >= 10000){
                        drawable.setLevel(0); 
                    }
                    //修改ClipDrawable的level值 
                    drawable.setLevel(drawable.getLevel() +500); 
                } 
            } 
        }; 
                      
        //时间类
        final Timer timer = new Timer(); 
        timer.schedule(new TimerTask() 
        { 
            public void run() 
            { 
                Message msg = new Message(); 
                msg.what = 0x1233; 
                //发送消息,通知应用修改ClipDrawable对象的level值 
                handler.sendMessage(msg); 
                //取消定时器 
//                if(drawable.getLevel() >= 10000) 
//                { 
//                    timer.cancel(); 
//                } 
            } 
        },0,300); 
    } 
}