package com.lxt008;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.view.Window;import android.widget.Button;import android.widget.ProgressBar;public class Activity01 extends Activity{    //声明ProgressBar对象    private ProgressBar m_ProgressBar;    private ProgressBar m_ProgressBar2;    private Button mButton01;    protected static final int GUI_STOP_NOTIFIER = 0x108;    protected static final int GUI_THREADING_NOTIFIER = 0x109;    public int intCounter=0;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        //设置窗口模式，，因为需要显示进度条在标题栏        requestWindowFeature(Window.FEATURE_PROGRESS);        setProgressBarVisibility(true);        setContentView(R.layout.main);                //取得ProgressBar        m_ProgressBar = (ProgressBar) findViewById(R.id.ProgressBar01);        m_ProgressBar2= (ProgressBar) findViewById(R.id.ProgressBar02);        mButton01 = (Button)findViewById(R.id.Button01);                 m_ProgressBar.setIndeterminate(false);        m_ProgressBar2.setIndeterminate(false);                //当按钮按下时开始执行,        mButton01.setOnClickListener(new Button.OnClickListener()        {          @Override          public void onClick(View v)          {            // TODO Auto-generated method stub                            //设置ProgressBar为可见状态              m_ProgressBar.setVisibility(View.VISIBLE);              m_ProgressBar2.setVisibility(View.VISIBLE);              //设置ProgressBar的最大值              m_ProgressBar.setMax(100);              //设置ProgressBar当前值              m_ProgressBar.setProgress(0);              m_ProgressBar2.setProgress(0);              //通过线程来改变ProgressBar的值                new Thread(new Runnable() {                    public void run()                    {                        for (int i = 0; i < 10; i++)                        {                            try                            {                                intCounter = (i + 1) * 20;                                Thread.sleep(1000);                                if (i == 4)                                {                                    Message m = new Message();                                    m.what = Activity01.GUI_STOP_NOTIFIER;                                    Activity01.this.myMessageHandler.sendMessage(m);                                    break;                                }                                else                                {                                    Message m = new Message();                                    m.what = Activity01.GUI_THREADING_NOTIFIER;                                    Activity01.this.myMessageHandler.sendMessage(m);                                }                            }                            catch (Exception e)                            {                                e.printStackTrace();                            }                        }                    }                }).start();            }        });    }      Handler myMessageHandler = new Handler()      {        // @Override           public void handleMessage(Message msg)          {              switch (msg.what)              {              //ProgressBar已经是对大值              case Activity01.GUI_STOP_NOTIFIER:                  m_ProgressBar.setVisibility(View.GONE);                  m_ProgressBar2.setVisibility(View.GONE);                  Thread.currentThread().interrupt();                  break;              case Activity01.GUI_THREADING_NOTIFIER:                  if (!Thread.currentThread().isInterrupted())                  {                      // 改变ProgressBar的当前值                      m_ProgressBar.setProgress(intCounter);                      m_ProgressBar2.setProgress(intCounter);                                            // 设置标题栏中前景的一个进度条进度值                      setProgress(intCounter*100);                      // 设置标题栏中后面的一个进度条进度值                      setSecondaryProgress(intCounter*100);//                  }                  break;              }              super.handleMessage(msg);         }      };}

<?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="@string/hello"    />  <ProgressBar    android:id="@+id/ProgressBar01"    style="?android:attr/progressBarStyleHorizontal"    android:layout_width="200dp"    android:layout_height="wrap_content"    android:visibility="gone"  />  <ProgressBar           android:id="@+id/ProgressBar02"        android:layout_width="wrap_content"         android:layout_height="wrap_content"        style="?android:attr/progressBarStyleLarge"        android:max="100"        android:progress="50"        android:secondaryProgress="70"        android:visibility="gone"  />  <Button    android:id="@+id/Button01"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="开始" /></LinearLayout>