<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".EX0315" >

    <TextView

        android:layout_width="100dp"

        android:layout_height="wrap_content"

        android:id="@+id/Ex0315TextView"

        android:layout_marginLeft="20dp"

        android:layout_marginTop="0dp"

        android:text="@string/hello_world" />

    <Button android:id="@+id/Ex0315StartButton"

        android:layout_width="100dp"

        android:layout_height="wrap_content"

        android:layout_marginLeft="20dp"

        android:layout_marginTop="40dp"

        android:text="@string/ex0315Startbutton" />

    <Button android:id="@+id/Ex0315SendButton"

            android:layout_width="100dp"

            android:layout_height="wrap_content"

            android:layout_marginLeft="20dp"

            android:layout_marginTop="110dp"

            android:text="@string/ex0315Sendbutton" />

</RelativeLayout>

package com.iruisi.service;

import android.app.Service;

import android.content.Intent;

import android.os.Handler;

import android.os.IBinder;

import android.util.Log;

public class Ex0315Service extends Service {

    private static final String TAG = "MyService";

    private Handler mHandler=new Handler();

    private int mCount=;

    private Runnable mRunnable = new Runnable() {

        @Override

        public void run() {

            mCount++;

            sendMsg2Activity("start send to service");

            Log.i("hippo","计算器"+Integer.toString(mCount));

            mHandler.postDelayed(mRunnable,);

        }

    };

@Override

    public void onCreate() {

        super.onCreate();

        Log.e(TAG, "start onCreate~~~");

        //开启服务 延时1s

        mHandler.postDelayed(mRunnable,);

    }

    private void sendMsg2Activity(String msg){

        //发送广播

         Intent intent=new Intent();

         intent.putExtra("count", mCount);

         intent.setAction("com.iruisi.service.Ex0315Service");

         sendBroadcast(intent);

    }

@Override

    public IBinder onBind(Intent intent) {

        return null;

    }

@Override

    public void onDestroy() {

        mHandler.removeCallbacks(mRunnable);

        super.onDestroy();

    }

@Override

    public boolean onUnbind(Intent intent) {

        // TODO Auto-generated method stub

        return super.onUnbind(intent);

    }

@Override

    public void onRebind(Intent intent) {

        // TODO Auto-generated method stub

        super.onRebind(intent);

    }

@Override

    public int onStartCommand(Intent intent, int flags, int startId) {

        // TODO Auto-generated method stub

    return super.onStartCommand(intent, flags, startId);

}

}

package com.example.hellowrold;

import com.example.hellowrold.R.id;

import com.iruisi.service.Ex0315Service;

import android.R.string;

import android.os.Bundle;

import android.app.Activity;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.view.Menu;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

public class EX0315 extends Activity {

    private TextView mTextView;

    private Button startButton;

    private Button sendbuButton;

    private Ex0315ServiceReceiver receiver=null;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_ex0315);

        mTextView=(TextView)findViewById(id.Ex0315TextView);

        startButton=(Button)findViewById(id.Ex0315StartButton);

        startButton.setOnClickListener(new Button.OnClickListener() {

            @Override

            public void onClick(View v) {

                Intent sIntent=new Intent(EX0315.this,Ex0315Service.class);

                //sIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

                startService(sIntent);

                receiver=new Ex0315ServiceReceiver();

                IntentFilter mIntentFilter=new IntentFilter();

                mIntentFilter.addAction("com.iruisi.service.Ex0315Service");

                EX0315.this.registerReceiver(receiver, mIntentFilter);

            }

        });

        sendbuButton=(Button)findViewById(id.Ex0315SendButton);

        sendbuButton.setOnClickListener(new Button.OnClickListener() {

            @Override

            public void onClick(View v) {

                Intent sIntent=new Intent(EX0315.this,Ex0315Service.class);

                stopService(sIntent);

            }

        });

        mTextView.setText("hahh");

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.ex0315, menu);

        return true;

    }

    public class Ex0315ServiceReceiver extends BroadcastReceiver{

        @Override

        public void onReceive(Context context, Intent intent) {

            Bundle mBundle=intent.getExtras();

        int count=mBundle.getInt("count");
　　　　 //其实不用在广播里重新要获取一下TextView 对象 setText参数是字符串类型，不是整型

        //mTextView=(TextView)findViewById(id.Ex0315TextView);

        mTextView.setText(String.valueOf(count));

        }

    }

}

在manifest里添加

        <service

            android:name="com.iruisi.service.Ex0315Service"

            android:exported="false" >

        </service>