1、New→Other→BroadcastReceiver

package com.example.lhb.startservice;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.widget.Toast;

public class MyReceiver extends BroadcastReceiver {

public MyReceiver() {

}

public static final String ACTION="com.example.lhb.startservice.intent.action.MyReceiver";//约定俗成，包名+intent.action+MyReceiver

@Override

public void onReceive(Context context, Intent intent) {

System.out.println("接收到了消息："+intent.getStringExtra("data"));

throw new UnsupportedOperationException("Not yet implemented");

}

}

2、主程序

package com.example.lhb.startservice;

import android.app.Activity;

import android.content.Intent;

import android.content.IntentFilter;

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity implements View.OnClickListener {

private EditText inputText;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

private MyReceiver receiver=null;

@Override

public void onClick(View v) {

switch (v.getId()){

case R.id.btnSendMsg:

Intent intent=new Intent(MyReceiver.ACTION);//隐式传递

intent.putExtra("data","GeoStorm");

break;

case R.id.btnReg:

if(receiver==null){

receiver=new MyReceiver();

registerReceiver(receiver,new IntentFilter(MyReceiver.ACTION));

}

break;

case R.id.btnUnReg:

if(receiver!=null) {

unregisterReceiver(receiver);

receiver = null;

}

break;

}

}

}

注：只有注册了接收器后才能发送与接收到消息。