<?xml version="1.0" encoding="utf-8"?>

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

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

    <Button

        android:id="@+id/btnStartService"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Start Service"

        />

    <Button

        android:id="@+id/btnStopService"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Stop Service"

        />

</LinearLayout>

package com.szy.service;

import android.app.Service;

import android.content.Intent;

import android.os.IBinder;

import android.util.Log;

public class ExampleService extends Service

{

    private static final String TAG="ExampleService";

    @Override

    public void onCreate()

    {

        Log.i(TAG, "ExampleService-->onCreate");

        super.onCreate();

    }

    @Override

    public void onStart(Intent intent, int startId)

    {

        // TODO Auto-generated method stub

        super.onStart(intent, startId);

    }

    @Override

    public void onDestroy()

    {

        Log.i(TAG, "ExampleService-->onDestroy");

        super.onDestroy();

    }

    @Override

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

    {

        Log.i(TAG, "ExampleService-->onStartCommand");

        return START_NOT_STICKY;

    }

    @Override

    public IBinder onBind(Intent intent)

    {

        return null;

    }

}

package com.szy.service;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends Activity

{

    private Button btnStartService;

    private Button btnStopService;

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        btnStartService = (Button) findViewById(R.id.btnStartService);

        btnStopService = (Button) findViewById(R.id.btnStopService);

        btnStartService.setOnClickListener(listener);

        btnStopService.setOnClickListener(listener);

    }

    private OnClickListener listener=new OnClickListener()

    {

        public void onClick(View v)

        {

            Intent intent=new Intent(MainActivity.this, ExampleService.class);

            switch (v.getId())

            {

            case R.id.btnStartService:

                startService(intent);

                break;

            case R.id.btnStopService:

                stopService(intent);

                break;

            default:

                break;

            }

        }

    };

}

<?xml version="1.0" encoding="utf-8"?>

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

      package="com.szy.service"

      android:versionCode="1"

      android:versionName="1.0">

    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".MainActivity"

                  android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <service android:name=".ExampleService" />

    </application>

</manifest>