android Noti

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package com.example.notificationtest;    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.activity_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.ic_launcher,                  "NotificationTest", 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 ="NotificationTest标题"; // 通知栏标题          CharSequence contentText ="NotificationTest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

 notificationIntent.setAction(Intent.ACTION_MAIN);  //加上这两句。点击notification跳转到运行的activity,不会新建activity         notificationIntent.addCategory(Intent.CATEGORY_LAUNCHER);//加上这两句。点击notification跳转到运行的activity,不会新建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);      }    //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);       }}

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