Android横向进度条演示效果

 <ProgressBar
  android:id="@+id/pb"  style="@android:style/Widget.ProgressBar.Horizontal"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:max="100" />  

package com.zengtao.classwork; 
 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.support.v7.app.ActionBarActivity; 
import android.widget.ProgressBar; 
 
public class MainActivity extends ActionBarActivity { 
 private ProgressBar pb; // 进度条 
 private int[] randData = new int[100]; // 数组 
 private int index = 0; // 索引 
 private int mProgressStaus = 0; // 设置进度条的长度 
 private Handler mHandler; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
 
  pb = (ProgressBar) findViewById(R.id.pb); 
 
  // 初始化handle，绑定在主线程中的队列消息中 
  mHandler = new Handler() { 
   @Override 
   public void handleMessage(Message msg) { 
    super.handleMessage(msg); 
    // 接收消息 
    if (msg.what == 0x111) { 
     mProgressStaus = index; 
     pb.setProgress(mProgressStaus); 
    } 
   } 
  }; 
  // 创建子线程，在子线程中处理耗时工作 
  new Thread() { 
   @Override 
   public void run() { 
    super.run(); 
    while (index < 100) { 
     doWork(); 
     Message msg = new Message(); 
     msg.what = 0x111; 
     mHandler.sendMessage(msg); 
    } 
   } 
 
  }.start(); 
 } 
 
 /** 
  * 模拟耗时工作（一定要在子线程中做） 
  * 
  * @return 进度条的多少 
  */ 
 public int doWork() { 
  randData[index++] = (int) (Math.random() * 100); 
  try { 
   Thread.sleep(100); 
  } catch (InterruptedException e) { 
   e.printStackTrace(); 
  } 
  return index; 
 } 
}