Android线程和handler

　　根据视频仿照着写了个demo:

package com.wyl.wylthreadtest;

import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {
	TextView textView;
	Button button;
	Handler myhandler;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = (TextView)findViewById(R.id.textViewId);
        button = (Button)findViewById(R.id.buttonId);
        myhandler = new myHandler();

        buttonListener listener = new buttonListener();
        button.setOnClickListener(listener);
    }
    /**
     * 添加button的onclick监听器
     * @author Administrator
     *
     */
    class buttonListener implements OnClickListener{
    	@Override
    	public void onClick(View view) {
//    		textView.setText("我的女神");
//    		textView.setTextColor(Color.GRAY);
//    		System.out.println("buttonListener："+Thread.currentThread().getName());

    		myThread mythread = new myThread();
    		System.out.println("buttonListener："+Thread.currentThread().getName());
    		mythread.start();
//    		mythread.run();
    	}

    }
    /**
     * 实现自己的一个线程，模拟从网络上获取数据然后传给handler
     * @author Administrator
     *
     */
    class myThread extends Thread{
    	String name = "模拟从网络上获取数据然后传给handler";

    	@Override
    	public void run() {
    		try {
				sleep(1*1000);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
    		System.out.println("myThead 子线程"+Thread.currentThread().getName());

    		Message msg = myhandler.obtainMessage();
    		msg.obj = name;
    		myhandler.sendMessage(msg);
    	}

    }

    /**
     * handler继承Handler父类
     * @author Administrator
     *
     */
    class myHandler extends Handler{
    	@Override
    	public void handleMessage(Message msg) {
    		System.out.println("myHandler:"+Thread.currentThread().getName());
    		String name = (String)msg.obj;
    		textView.setText(name);
    	}

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            return rootView;
        }
    }

}

　　效果图如下：