使用TimerTask控制ProgressBar

有很多朋友使用Thread进行Progress的进度控制，这里我们使用Timer和TimerTask控制ProgressBar。

实现效果： 在进度75%之前，每秒钟有5%的进度，在75%之后每秒有1%的进度。

需要的知识：
1、ProgressBar
2、Thread
3、Timer和TimerTask 

Activity代码：

package cc.androidos.pb;import java.util.Timer; 
import java.util.TimerTask;import android.app.Activity; 
import android.os.Bundle; 
import android.os.Handler; 
import android.view.View; 
import android.widget.ProgressBar; 
/** 
* <p> 
* Progress Bar test 
* </p> 
* @author SinFrancis Wong 
* @version 1.0 
* @since 2009-3-10 
*/ 
public class ProgressBarTest extends Activity 
{ 
    /** Called when the activity is first created. */ 
    private ProgressBar mProgress = null; 
    /**Static for control the progress*/ 
    public static int mProgressStatus = 0;   
/**Handler for post message into OS and change UI */ 
    private Handler mHandler = new Handler();    @Override 
    public void onCreate( Bundle savedInstanceState ) 
    { 
        super.onCreate( savedInstanceState ); 
        //set the View 
        setContentView( R.layout.main ); 
        
        mProgress = ( ProgressBar ) findViewById( R.id.ProgressBar01 ); 
        
        //Progress Bar Click ! 
        mProgress.setOnClickListener( new View.OnClickListener() 
        {            @Override 
            public void onClick( View arg0 ) 
            { 
                ProgressBarTest.mProgressStatus = 0; 
                // a new Timer 
                Timer tt = new Timer(); 
                //Schedule the TimerTash , delay is 0 ms, every 1000ms execute the action 
                tt.schedule( new ReTimerTask(), 0, 1 * 1000 ); 
                
                //Scout the progress 
                scoutProgress.start(); 
            } 
        } );    }    /** 
     * Scout the progress 
     */ 
    Thread scoutProgress = new Thread( new Runnable() 
    { 
        public void run() 
        { 
            while ( mProgressStatus < 100 ) 
            { 
                // Update the progress bar 
                mHandler.post( new Runnable() 
                { 
                    public void run() 
                    { 
                        mProgress.setProgress( mProgressStatus ); 
                    } 
                } ); 
            } 
        } 
    } ); 
} 
/** 
* A new TimerTask 
* @author SinFrancis Wong 
* @version 1.0 
* @since 2009-3-10 
*/ 
class ReTimerTask extends TimerTask 
{ 
    @Override 
    public void run() 
    {        //以下是监测进度到什么位置，如果在75范围内就对进度+5，如果在75----100之间就对进度+1，否则取消此任务
        if( ProgressBarTest.mProgressStatus < 75 ) 
        { 
            ProgressBarTest.mProgressStatus += 5; 
            System.err.println( "<75......." + ProgressBarTest.mProgressStatus ); 
        } 
        else if( ProgressBarTest.mProgressStatus < 100 
            && ProgressBarTest.mProgressStatus >= 75 ) 
        { 
            ProgressBarTest.mProgressStatus += 1;            System.err.println( ">75 || <100......." 
                + ProgressBarTest.mProgressStatus ); 
        } 
        else if( ProgressBarTest.mProgressStatus >= 100 ) 
        { 
            System.err 
                .println( ">100......." + ProgressBarTest.mProgressStatus ); 
            cancel(); 
        } 
    } 
} 

布局文件代码：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
androidrientation="vertical" android:layout_width="fill_parent" 
android:layout_height="fill_parent"> 
<TextView android:layout_width="fill_parent" 
  android:layout_height="wrap_content" android:text="@string/hello" /> 
<progressBar android:id="@+id/ProgressBar01" 
  android:layout_width="100px" 
  android:layout_height="20px" 
  android:max="100" 
  android:progress="0" 
  style="?android:attr/progressBarStyleHorizontal"
//style设置是为了使得ProgressBar变成进度条而不是圆圈 > 
</ProgressBar> 
</LinearLayout>