Android 主页面顶部栏的通知Notification 。

 1 package com.lixu.tongzhi;
 2
 3 import android.app.Activity;
 4 import android.app.Notification;
 5 import android.app.NotificationManager;
 6 import android.os.Bundle;
 7 import android.support.v4.app.NotificationCompat;
 8 import android.view.View;
 9 import android.view.View.OnClickListener;
10 import android.widget.Button;
11 import android.widget.Toast;
12
13 public class MainActivity extends Activity {
14
15     private static final int ID = 1987;
16
17     @Override
18     protected void onCreate(Bundle savedInstanceState) {
19         super.onCreate(savedInstanceState);
20         setContentView(R.layout.activity_main);
21
22         Button btn1 = (Button) findViewById(R.id.fasong);
23         Button btn2 = (Button) findViewById(R.id.qingchu);
24
25         btn1.setOnClickListener(new OnClickListener() {
26
27             @Override
28             public void onClick(View v) {
29                 send();
30
31                 Toast.makeText(getApplicationContext(), "发送通知成功！", 0).show();
32
33             }
34         });
35
36         btn2.setOnClickListener(new OnClickListener() {
37
38             @Override
39             public void onClick(View v) {
40
41                 delete();
42
43                 Toast.makeText(getApplicationContext(), "清除通知成功！", 0).show();
44
45             }
46         });
47
48     }
49
50     private void send() {
51         // 获取通知管理器
52         NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
53
54         NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
55         // 设置通知图片
56         mBuilder.setSmallIcon(R.drawable.sdfdf);
57         // 设置标题
58         mBuilder.setContentTitle("小超人来了！");
59         // 设置通知内容
60         mBuilder.setContentText("我是小超人，主人有什么事情要吩咐。");
61
62         Notification notification = mBuilder.build();
63         // 设置通知声音或者震动。
64         notification.defaults = Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE;
65         // 通知时间
66         notification.when = System.currentTimeMillis();
67         // 通过特定id来发送这个通知
68         manager.notify(ID, notification);
69
70     }
71
72     private void delete() {
73         // 获取通知管理器
74         NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
75         manager.cancel(ID);
76
77     }
78
79 }

常用的程序通知，显示到主页面的顶部栏。

xml文件：

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent" >
 5
 6     <Button
 7         android:id="@+id/fasong"
 8         android:layout_width="wrap_content"
 9         android:layout_height="wrap_content"
10         android:layout_alignLeft="@+id/qingchu"
11         android:layout_alignParentTop="true"
12         android:layout_marginTop="56dp"
13         android:text="发送通知" />
14
15     <Button
16         android:id="@+id/qingchu"
17         android:layout_width="wrap_content"
18         android:layout_height="wrap_content"
19         android:layout_below="@+id/fasong"
20         android:layout_centerHorizontal="true"
21         android:layout_marginTop="88dp"
22         android:text="清除通知" />
23
24 </RelativeLayout>

运行效果图：