Android 实现任务栏出现类似短信的提示功能

要实现Android的消息提示，就是提示用户有新的更新或者信息。即使当用户退出了应用程序。也会类似短信提示那种功能。长话短说，开个service，在后台一直跑，进行数据监控，发现有更新就触发消息提示功能。

上代码：

package com.example.notificationdemo;import android.os.Bundle;import android.app.Activity;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.Context;import android.content.Intent;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.RemoteViews;public class MainActivity extends Activity {Button start;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);start = (Button) findViewById(R.id.start);start.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub// showDefaultNotification();showCustomizeNotification();}});}// 自定义显示的通知 ，创建RemoteView对象private void showCustomizeNotification() {CharSequence title = "信息";int icon = R.drawable.icon_blue;long when = System.currentTimeMillis();Notification noti = new Notification(icon, title, when + 10000);// noti.flags = Notification.FLAG_INSISTENT;noti.defaults |= Notification.DEFAULT_SOUND;noti.defaults |= Notification.DEFAULT_VIBRATE;noti.flags |= Notification.FLAG_AUTO_CANCEL;noti.flags |= Notification.FLAG_ONLY_ALERT_ONCE;// 1、创建一个自定义的消息布局 view.xml// 2、在程序代码中使用RemoteViews的方法来定义image和text。然后把RemoteViews对象传到contentView字段RemoteViews remoteView = new RemoteViews(this.getPackageName(),R.layout.notification);remoteView.setImageViewResource(R.id.noti_icon, R.drawable.icon_blue);remoteView.setTextViewText(R.id.noti_content, "出现预警，请查实！");noti.contentView = remoteView;// 3、为Notification的contentIntent字段定义一个Intent(注意，使用自定义View不需要setLatestEventInfo()方法)// 这儿点击后简单启动Settings模块PendingIntent contentIntent = PendingIntent.getActivity(MainActivity.this, 0, new Intent("android.settings.SETTINGS"),0);noti.contentIntent = contentIntent;NotificationManager mnotiManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);mnotiManager.notify(0, noti);}// 默认显示的的Notificationprivate void showDefaultNotification() {// 定义Notication的各种属性CharSequence title = "i am new";int icon = R.drawable.icon_blue_small;long when = System.currentTimeMillis();Notification noti = new Notification(icon, title, when + 10000);noti.flags = Notification.FLAG_INSISTENT;// 创建一个通知Notification mNotification = new Notification();// 设置属性值mNotification.icon = R.drawable.icon_blue_small;mNotification.tickerText = "NotificationTest";mNotification.when = System.currentTimeMillis(); // 立即发生此通知// 带参数的构造函数,属性值如上// Notification mNotification = = new// Notification(R.drawable.icon,"NotificationTest",// System.currentTimeMillis()));// 添加声音效果mNotification.defaults |= Notification.DEFAULT_SOUND;// 添加震动,后来得知需要添加震动权限 : Virbate Permission// mNotification.defaults |= Notification.DEFAULT_VIBRATE ;// 添加状态标志// FLAG_AUTO_CANCEL 该通知能被状态栏的清除按钮给清除掉// FLAG_NO_CLEAR 该通知能被状态栏的清除按钮给清除掉// FLAG_ONGOING_EVENT 通知放置在正在运行// FLAG_INSISTENT 通知的音乐效果一直播放mNotification.flags = Notification.FLAG_INSISTENT;// 将该通知显示为默认ViewPendingIntent contentIntent = PendingIntent.getActivity(MainActivity.this, 0, new Intent("android.settings.SETTINGS"),0);mNotification.setLatestEventInfo(MainActivity.this, "通知类型：默认View","一般般哟。。。。", contentIntent);// 设置setLatestEventInfo方法,如果不设置会App报错异常NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);// 注册此通知// 如果该NOTIFICATION_ID的通知已存在，会显示最新通知的相关信息 ，比如tickerText 等mNotificationManager.notify(2, mNotification);}private void removeNotification() {NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);// 取消的只是当前Context的NotificationmNotificationManager.cancel(2);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.activity_main, menu);return true;}}

配套demo： http://download.csdn.net/detail/vaecer/8416543

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