【Android】android线程处理机制1

通过一个例子来理解android的线程处理机制，对于在这里用runnable接口的效果。

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;

public class Handler2 extends Activity {
    /** Called when the activity is first created. */
 public Button startbutton;
    public Button endbutton;
 public ProgressBar bar;
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        bar=(ProgressBar)findViewById(R.id.bar);
        startbutton=(Button)findViewById(R.id.startbutton);
        startbutton.setOnClickListener(new startbuttonListener());
        endbutton=(Button)findViewById(R.id.endbuton);
//        endbutton.setOnClickListener(new endbuttonListener());
       
    }
 
 class startbuttonListener implements OnClickListener
 {
  public void onClick(View v)
  {
   bar.setVisibility(View.VISIBLE);
   handler.post(updateThread);
  }
 }
 
 Handler handler=new Handler(){

  @Override
  public void handleMessage(Message msg) {
   //super.handleMessage(msg);
   bar.setProgress(msg.arg1);
   System.out.println("msg   "+msg.arg1);
   handler.post(updateThread);
   
   }
 };
 
 Runnable updateThread=new Runnable(){
  
  int i=0;
  public void run()
  {
   i=i+10;
   Message msg=handler.obtainMessage();
   msg.arg1=i;
   
   System.out.println("updateProgress "+i);
   try {
    Thread.sleep(1000);
   } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   handler.sendMessage(msg);
   if(i==100)
   {
    handler.removeCallbacks(updateThread);
   
   }
    
  }
 };
 转载自百度空间zhao_xu_dong的分享，原文地址为：http://apps.hi.baidu.com/share/detail/31068106。

 感谢原文作者的无私分享。