progressBar

---------------------------main.java-----------------------

package org.crazyit.progress;


import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ProgressBar;


/**
 * Description:
 * <br/>site: <a href="http://www.crazyit.org">crazyit.org</a> 
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class ProgressBarTest extends Activity
{
//该程序模拟填充长度为100的数组
private int[] data = new int[100];
int hasData = 0;
//记录ProgressBar的完成进度
int status = 0;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final ProgressBar bar = (ProgressBar) findViewById(R.id.bar);
final ProgressBar bar2 = (ProgressBar) findViewById(R.id.bar2);
//创建一个负责更新的进度的Handler
final Handler mHandler = new Handler()
{
@Override
public void handleMessage(Message msg)
{
//表明消息是由该程序发送的。
if (msg.what == 0x111)
{
bar.setProgress(status);
bar2.setProgress(status);
}
}
};
//启动线程来执行任务
new Thread()
{
public void run()
{
while (status < 100)
{
// 获取耗时操作的完成百分比
status = doWork();
// 发送消息到Handler
Message m = new Message();
m.what = 0x111;
// 发送消息
mHandler.sendMessage(m);
}
}
}.start();
}
//模拟一个耗时的操作。
public int doWork()
{
//为数组元素赋值
data[hasData++] = (int)(Math.random() * 100);
try
{
Thread.sleep(100);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
return hasData;
}
}

----------------------------------main.xml-------------------------------------------

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="任务完成的进度"
/>
<!-- 定义一个水平进度条 -->
<ProgressBar
android:id="@+id/bar"
  android:layout_width="fill_parent" 
android:layout_height="wrap_content"
android:max="100"
style="@android:style/Widget.ProgressBar.Horizontal"
/>
<!-- 定义一个水平进度条，并改变轨道外观 -->
<ProgressBar
android:id="@+id/bar2"
  android:layout_width="fill_parent" 
android:layout_height="wrap_content"
android:max="100"
android:progressDrawable="@drawable/my_bar"
style="@android:style/Widget.ProgressBar.Horizontal"
/>
</LinearLayout>

------------------------/drawable_hdpi/my_bar.xml-------------------------

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 定义轨道的背景 -->
<item android:id="@android:id/background"
android:drawable="@drawable/no" />
<!-- 定义轨道上已完成部分的样式 -->
<item android:id="@android:id/progress"
android:drawable="@drawable/ok" />
</layer-list>