Android-高级UI控件_ProgressBar进度条

代码

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);
         }
      };
}

布局

<?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>