Android 线程 实例介绍

package gongzibai.co.cc;

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

public class EX3Activity extends Activity {
 public static final int UPDATE_DATA = 0;
 public static final int UPDATE_COMPLETED = 1;
 TextView mTextView;
 Button mButton;

 Handler mHandler = new Handler() {
  public void handleMessage(Message msg) {
   switch (msg.what) {
   case UPDATE_DATA:
    mTextView.setText("正在更新来自线程的数据：" + msg.arg1 + "%......");

    break;

   case UPDATE_COMPLETED:
    mTextView.setText("已完成来自线程的数据");
    break;
   }

  }
 };

 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);
  mTextView = (TextView) findViewById(R.id.textView1);
  mButton = (Button) findViewById(R.id.button1);
  mButton.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
//     TODO Auto-generated method stub
     new Thread() {
     @Override
     public void run() {
     // TODO Auto-generated method stub
    
     for (int i = 0; i < 100; i++) {
     try {
     Thread.sleep(30);
     } catch (Exception e) {
     // TODO: handle exception
     e.printStackTrace();
     }
     Message m = mHandler.obtainMessage();
     m.what = UPDATE_DATA;
     m.arg1 = i + 1;
     mHandler.sendMessage(m);
     }
     mHandler.sendEmptyMessage(UPDATE_COMPLETED);
     }
     }.start();
    
   }
  });

 }

}