package com.example.android_handler_01;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Looper;

import android.os.Message;

import android.widget.TextView;

public class MainActivity extends Activity {

private Handler handler = new Handler(){

public void handleMessage(android.os.Message msg) {

};

};

class MyThread extends Thread{

public Handler handler;

@Override

public void run() {

Looper.prepare();

handler = new Handler(){

@Override

public void handleMessage(Message msg) {

System.out.println("currentThread"+Thread.currentThread());

}

};

Looper.loop();

}

}

private MyThread myThread; 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        TextView textView = new TextView(this);

        textView.setText("hello everyone");

        setContentView(textView);

        myThread = new MyThread();

        myThread.start();

        myThread.handler.sendEmptyMessage(1);

    }

}