Android 开发工具类 16_NotificationActivity

在前台运行的 Activity 可以通过Dialog、Toast 向用户发出提示信息，而后台运行的程序，如下载、收到信息等 Service 应用，则需要使用 Notification(通知)向用户发出提示信息。
 1 import android.app.Activity;
 2 import android.app.Notification;
 3 import android.app.NotificationManager;
 4 import android.app.PendingIntent;
 5 import android.content.Context;
 6 import android.content.Intent;
 7 import android.os.Bundle;
 8 import android.view.View;
 9 import android.view.View.OnClickListener;
10 import android.widget.Button;
11 import android.widget.RemoteViews;
12 
13 public class NotificationActivity extends Activity {
14     
15     Button b1;
16     NotificationManager nmanager;
17     Notification notification;
18     int notificationID=1;
19     
20     @Override
21     protected void onCreate(Bundle savedInstanceState) {
22         super.onCreate(savedInstanceState);
23         
24         setContentView(R.layout.notificationlayout);
25         b1=(Button) findViewById(R.id.notification_bt1);
26         b1.setOnClickListener(new OnClickListener(){
27             @Override
28             public void onClick(View v) {
29                 //sendNotification();
30                 sendCustomNotification();
31             }}
32         );
33     }
34     
35     // 发送自定义通知
36     public void sendCustomNotification(){
37         //1.获得 NotificationManager
38         nmanager=(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
39         //2.创建 Notification
40         notification =new Notification(
41             R.drawable.folder_open,
42             "收到文件",
43             System.currentTimeMillis()
44             );
45         RemoteViews rv = new RemoteViews(getPackageName(),R.layout.notificationinterfacelayout);
46         rv.setImageViewResource(R.id.notification_img, R.drawable.savefile);
47         rv.setTextViewText(R.id.notification_title, "催眠曲.mp3");
48         rv.setProgressBar(R.id.notification_progressbar, 100, 20, false);
49         notification.contentView=rv;
50         //3.设置属性，这些属性会在展开状态栏后显示
51         Intent intent =new Intent(this,ToastActivity.class);    //转向其他
52         intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_NEW_TASK); 
53         PendingIntent pIntent=PendingIntent.getActivity(this, 0, intent, 0);
54         notification.contentIntent=pIntent;
55         //4.将Notification发给Manager
56         nmanager.notify(notificationID++, notification);
57     }
58     
59     // 发送通知
60     public void sendNotification(){
61         //1.获得NotificationManager
62         nmanager=(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
63         //2.创建Notification
64         notification =new Notification(
65             R.drawable.folder_open,
66             "收到文件",
67             System.currentTimeMillis()
68             );
69         // 可选属性
70         notification.defaults|=Notification.DEFAULT_SOUND;
71         notification.flags |=Notification.FLAG_INSISTENT;
72         
73         
74         // 3.设置属性，这些属性会在展开状态栏后显示
75         Intent intent =new Intent(this,ToastActivity.class);    //转向其他
76         intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_NEW_TASK); 
77         PendingIntent pIntent=PendingIntent.getActivity(this, 0, intent, 0);
78         notification.setLatestEventInfo(this, "接收文件", "文件已经下载完成", pIntent);
79         // 4.将 Notification 发给 Manager
80         nmanager.notify(notificationID++, notification);
81     }
82     
83 }