Android Notification通知详解

package com.ljq.activity;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        clearNotification();
    }

    @Override
    protected void onStop() {
        showNotification();
        super.onStop();
    }

    @Override
    protected void onStart() {
        clearNotification();
        super.onStart();
    }

    /**
     * 在状态栏显示通知
     */
    private void showNotification(){
        // 创建一个NotificationManager的引用   
        NotificationManager notificationManager = (NotificationManager)    
            this.getSystemService(android.content.Context.NOTIFICATION_SERVICE);   

        // 定义Notification的各种属性   
        Notification notification =new Notification(R.drawable.icon,   
                "督导系统", System.currentTimeMillis()); 
        //FLAG_AUTO_CANCEL   该通知能被状态栏的清除按钮给清除掉
        //FLAG_NO_CLEAR      该通知不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     是否一直进行，比如音乐一直播放，知道用户响应
        notification.flags |= Notification.FLAG_ONGOING_EVENT; // 将此通知放到通知栏的"Ongoing"即"正在运行"组中   
        notification.flags |= Notification.FLAG_NO_CLEAR; // 表明在点击了通知栏中的"清除通知"后，此通知不清除，经常与FLAG_ONGOING_EVENT一起使用   
        notification.flags |= Notification.FLAG_SHOW_LIGHTS;   
        //DEFAULT_ALL     使用所有默认值，比如声音，震动，闪屏等等
        //DEFAULT_LIGHTS  使用默认闪光提示
        //DEFAULT_SOUNDS  使用默认提示声音
        //DEFAULT_VIBRATE 使用默认手机震动，需加上<uses-permission android:name="android.permission.VIBRATE" />权限
        notification.defaults = Notification.DEFAULT_LIGHTS; 
        //叠加效果常量
        //notification.defaults=Notification.DEFAULT_LIGHTS|Notification.DEFAULT_SOUND;
        notification.ledARGB = Color.BLUE;   
        notification.ledOnMS =5000; //闪光时间，毫秒

        // 设置通知的事件消息   
        CharSequence contentTitle ="督导系统标题"; // 通知栏标题   
        CharSequence contentText ="督导系统内容"; // 通知栏内容   
        Intent notificationIntent =new Intent(MainActivity.this, MainActivity.class); // 点击该通知后要跳转的Activity   
        PendingIntent contentItent = PendingIntent.getActivity(this, 0, notificationIntent, 0);   
        notification.setLatestEventInfo(this, contentTitle, contentText, contentItent);   

        // 把Notification传递给NotificationManager   
        notificationManager.notify(0, notification);   
    }
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    //删除通知    
    private void clearNotification(){
        // 启动后删除之前我们定义的通知   
        NotificationManager notificationManager = (NotificationManager) this
                .getSystemService(NOTIFICATION_SERVICE);   
        notificationManager.cancel(0);  

    }
}