Android多线程之图解Handler Looper MessageQueue Message

package com.example.katahandler;

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

public class MainActivity extends Activity {

	Button mButton;
	ProgressBar mProgressBar;
	ProgressBar mProgressBar2;
	static final int PROGRESS_VALUE1 = 1;
	static final int PROGRESS_VALUE2 = 2;
	int mClickCount = 0;
	class MyHandler extends Handler{

		@Override
		public void handleMessage(Message msg) {
			// TODO Auto-generated method stub
			//区分消息的种类
			if ( msg.what == PROGRESS_VALUE1 ){
				mProgressBar.setProgress(msg.arg1);
				super.handleMessage(msg);
			}
			else if ( msg.what == PROGRESS_VALUE2 ){
				mProgressBar2.setProgress(msg.arg1);
				super.handleMessage(msg);
			}
		}
	}
	MyHandler handler;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mProgressBar = (ProgressBar) findViewById(R.id.progressBar1);
		mProgressBar2 = (ProgressBar) findViewById(R.id.progressBar2);
		mButton = (Button) findViewById(R.id.button1);
		mButton.setOnClickListener(new OnClickListener() {

			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				mClickCount++;
				
				new Thread(){
					@Override
					public void run() {
						int what = 0;
						if(mClickCount==1)
							what = PROGRESS_VALUE1;
						else if(mClickCount==2)
							what = PROGRESS_VALUE2;

						for(int i = 0;i<100;i++){
							try {
								sleep(100);
							} catch (InterruptedException e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
							}
							
							Message msg = handler.obtainMessage(what, i+1, 0);
							handler.sendMessage(msg);
						}
						super.run();
					}
				}.start();
			}
		});
		handler = new MyHandler();
	}
}