简单抓取服务器端推送消息的思路

这个推送消息的模型就是从Service启动一个线程,定期获取服务器端消息然后显示出来:

MessageService.java文件:

package com.text.ac;

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 MessageService extends Service {

	private Notification mNotification = null;

	private NotificationManager mNotifyManager = null;

	private Intent mIntent = null;
	private PendingIntent mPendingIntent = null;
	/** 获取消息线程 */
	private MessageThread mMsgThread = null;
	private int messageNotificationID = 1000;

	public IBinder onBind(Intent intent) {
		return null;
	}

	/** Called by the system when the service is first created. */
	@Override
	public void onCreate() {
		super.onCreate();

		mNotification = new Notification();
		/**
		 * The resource id of a drawable to use as the icon in the status bar.
		 * This is required; notifications with an invalid icon resource will
		 * not be shown.
		 */
		mNotification.icon = R.drawable.icon;
		mNotification.tickerText = "新消息";
		mNotification.defaults = Notification.DEFAULT_SOUND;
		mNotifyManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

		/** 点击跳转的activity. */
		mIntent = new Intent(this, ExTextActivity.class);
		mPendingIntent = PendingIntent.getActivity(this, 0, mIntent, 0);

		mMsgThread = new MessageThread();
		mMsgThread.isRunning = true;
		mMsgThread.start();
	}

	class MessageThread extends Thread {

		public boolean isRunning = true;

		public void run() {
			while (isRunning) {
				try {
					Thread.sleep(5000);
					/** 获取服务器消息 . */
					String mServerMsg = getServerMessage();

					if (mServerMsg != null && !"".equals(mServerMsg)) {
						/** 更新通知栏. */
						mNotification
								.setLatestEventInfo(MessageService.this, "新消息",
										"您中奖了,1个亿!" + mServerMsg,
										mPendingIntent);
						mNotifyManager.notify(messageNotificationID,
								mNotification);
						/** 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);
		/** 使用System.exit(0)，这样进程退出的更干净. */
		mMsgThread.isRunning = false;
		super.onDestroy();
	}

	/**
	 * 这里以此方法为服务器Demo，仅作示例
	 * 
	 * @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 "YES!";
	}
}