Android中利用App实现消息推送机制的代码

<!--下面会创建一个全局的com.cnblogs.tianxia.message的独立进程-->
<service android:name=".service.messageservice" android:label="消息推送" android:process=".message" />
<!--或者-->
<!--下面会创建一个应用私有的com.cnblogs.tianxia:message的独立进程-->
<service android:name=".service.messageservice" android:label="消息推送" android:process=":message" />
我们没必要建立一个全局的，本文选择第二种方案，创建一个当前应用私有的独立进程。
3.通知用户和点击查看
public class messageservice 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.icon;
messagenotification.tickertext = "新消息";
messagenotification.defaults = notification.default_sound;
messagenotificatiomanager = (notificationmanager)getsystemservice(context.notification_service);

messageintent = new intent(this, messageactivity.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{
//运行状态，www.3ppt.com下一步骤有大用
public boolean isrunning = true;
public void run() {
while(isrunning){
try {
//休息10分钟
thread.sleep(600000);
//获取服务器消息
string servermessage = getservermessage();
if(servermessage!=null&&!"".equals(servermessage)){
//更新通知栏
messagenotification.setlatesteventinfo(messageservice.this,"新消息","奥巴马宣布,本拉
登兄弟挂了!"+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();
}
}
}
}

/**
* 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!";
}
}

boolean ismessagepush = true;//不开启就设置为false;
...
if(ismessagepush){
startservice(new intent(this, messageservice.class))
};

@override
public void ondestroy() {
system.exit(0);
//或者，二选一，推荐使用system.exit(0)，这样进程退出的更干净
//messagethread.isrunning = false;
super.ondestroy();
}