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

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

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="hello" />

    <Button

        android:id="@+id/btnStart"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="通知" />

    <Button

        android:id="@+id/btnStop"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="清除" />

</LinearLayout>

package com.example.notificationservice;

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 implements OnClickListener {

    private Button btnStart;

    private Button btnStop;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        initView();

    }

    private void initView() {

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

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

        btnStart.setOnClickListener(this);

        btnStop.setOnClickListener(this);

    }

    @Override

    public void onClick(View v) {

        int id = v.getId();

        if (id == R.id.btnStart) {

            // 启动Service

            Intent intent = new Intent();

            intent.setAction("ymw.MY_SERVICE");

            startService(intent);

        }

        if (id == R.id.btnStop) {

            // 关闭Service

            Intent intent = new Intent();

            intent.setAction("ymw.MY_SERVICE");

            stopService(intent);

        }

    }

    @Override

    public void onBackPressed() {

        System.exit(0);

        super.onBackPressed();

    }

}

package com.example.notificationservice;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.app.Service;

import android.content.Context;

import android.content.Intent;

import android.os.IBinder;

public class NotificationService extends Service {

    // 获取消息线程

    private MessageThread messageThread = null;

    // 点击查看

    private Intent messageIntent = null;

    private PendingIntent messagePendingIntent = null;

    // 通知栏消息

    private int messageNotificationID = 1000;

    private Notification messageNotification = null;

    private NotificationManager messageNotificatioManager = null;

    public IBinder onBind(Intent intent) {

        return null;

    }

    @Override

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

        // 初始化

        messageNotification = new Notification();

        messageNotification.icon = R.drawable.ic_launcher;

        messageNotification.tickerText = "新消息";

        messageNotification.defaults = Notification.DEFAULT_SOUND;

        messageNotificatioManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        messageIntent = new Intent(this, MainActivity.class);

        messagePendingIntent = PendingIntent.getActivity(this, 0,

                messageIntent, 0);

        // 开启线程

        messageThread = new MessageThread();

        messageThread.isRunning = true;

        messageThread.start();

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

    }

    /**

     * 从服务器端获取消息

     *

     */

    class MessageThread extends Thread {

        // 设置是否循环推送

        public boolean isRunning = true;

        public void run() {

            // while (isRunning) {

            try {

                // 间隔时间

                Thread.sleep(1000);

                // 获取服务器消息

                String serverMessage = getServerMessage();

                if (serverMessage != null && !"".equals(serverMessage)) {

                    // 更新通知栏

                    messageNotification.setLatestEventInfo(

                            getApplicationContext(), "新消息", "您有新消息。"

                                    + serverMessage, messagePendingIntent);

                    messageNotificatioManager.notify(messageNotificationID,

                            messageNotification);

                    // 每次通知完，通知ID递增一下，避免消息覆盖掉

                    messageNotificationID++;

                }

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

            // }

        }

    }

    @Override

    public void onDestroy() {

        // System.exit(0);

        messageThread.isRunning = false;

        super.onDestroy();

    }

    /**

     * 模拟发送消息

     *

     * @return 返回服务器要推送的消息，否则如果为空的话，不推送

     */

    public String getServerMessage() {

        return "NEWS!";

    }

}