WorderThread这里是接受数据

所以创建Handler对象以及对数据的处理方法要放在这里

首先创建WorkerThread线程并在其中创建Handler对象以及重写handlerMessage方法

当点击Button，向WorkerThread发送数据

package com.njulya.testhandler;

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

public class MainActivity extends Activity {
    private Handler handler;
    private TextView text ;
    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        text = (TextView)findViewById(R.id.textId);
        button = (Button)findViewById(R.id.buttonId);

        Thread td = new Thread(){
            @Override
            public void run(){
                Looper.prepare();
                handler = new Handler(){
                    @Override
                    public void handleMessage(Message msg){
                        String str = (String)msg.obj;
                        System.out.println(str);
                    }
                };
                Looper.loop();
            }
        };
        td.start();

        button.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View arg0) {
                Message msg = handler.obtainMessage();
                msg.obj = "MainThread发送的数据";
                handler.sendMessage(msg);
            }
        });
    }

    @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;
    }

}