运行效果图：

结构目录：

注意事项：

如果logcat有错误提示：No Channel found for pkg， 可参考链接：https://blog.csdn.net/u010356768/article/details/83546008

activity_main.xml：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:app="http://schemas.android.com/apk/res-auto"
 4     xmlns:tools="http://schemas.android.com/tools"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     android:background="@drawable/background"
 8     tools:context=".MainActivity">
 9
10
11 </RelativeLayout>

activity_detail.xml：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:app="http://schemas.android.com/apk/res-auto"
 4     xmlns:tools="http://schemas.android.com/tools"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     android:background="@drawable/img"
 8     tools:context=".DetailActivity">
 9
10 </RelativeLayout>

MainActivity：

 1 package com.mingrisoft.notification;
 2
 3 import android.app.Notification;
 4 import android.app.NotificationChannel;
 5 import android.app.NotificationManager;
 6 import android.app.PendingIntent;
 7 import android.content.Intent;
 8 import android.graphics.Color;
 9 import android.os.Build;
10 import android.support.annotation.RequiresApi;
11 import android.support.v4.app.NotificationCompat;
12 import android.support.v7.app.AppCompatActivity;
13 import android.os.Bundle;
14 import android.util.Log;
15
16 public class MainActivity extends AppCompatActivity {
17     final int NOTIFIYID = 0x123;    //通知的ID
18
19     @Override
20     protected void onCreate(Bundle savedInstanceState) {
21         super.onCreate(savedInstanceState);
22         setContentView(R.layout.activity_main);
23
24         //获取通知管理器用于发送通知
25         final NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
26         //创建一个Notification对象
27         Notification.Builder notification = new Notification.Builder(MainActivity.this);
28         //设置打开该通知，该通知自动消失
29         notification.setAutoCancel(true);
30         //设置通知的图标
31         notification.setSmallIcon(R.drawable.packet);
32         //设置通知的标题
33         notification.setContentTitle("奖励百万红包");
34         //设置通知的内容
35         notification.setContentText("点击查看详情");
36         //设置发送时间
37         notification.setWhen(System.currentTimeMillis());
38         //设置使用系统默认的声音、震动
39         notification.setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE);
40         //兼容android8.0
41         if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
42             NotificationChannel channel = new NotificationChannel("001","my_channel",NotificationManager.IMPORTANCE_DEFAULT);
43             channel.enableLights(true); //是否在桌面icon右上角展示小红点
44             channel.setLightColor(Color.GREEN); //小红点颜色
45             channel.setShowBadge(true); //是否在久按桌面图标时显示此渠道的通知
46             notificationManager.createNotificationChannel(channel);
47             notification.setChannelId("001");
48         }
49
50         //创建一个启动DetailActivity的Intent
51         Intent intent = new Intent(MainActivity.this, DetailActivity.class);
52         PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, intent, 0);
53         //设置通知栏点击跳转
54         notification.setContentIntent(pendingIntent);
55         //发送通知
56         notificationManager.notify(NOTIFIYID, notification.build());
57     }
58 }

DetailActivity：

 1 package com.mingrisoft.notification;
 2
 3 import android.support.v7.app.AppCompatActivity;
 4 import android.os.Bundle;
 5
 6 public class DetailActivity extends AppCompatActivity {
 7
 8     @Override
 9     protected void onCreate(Bundle savedInstanceState) {
10         super.onCreate(savedInstanceState);
11         setContentView(R.layout.activity_detail);
12     }
13 }

因为程序要访问系统震动器，所以要声明权限：

manifests:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3     package="com.mingrisoft.notification">
 4
 5     <uses-permission android:name="android.permission.VIBRATE"></uses-permission>
 6
 7     <application
 8         android:allowBackup="true"
 9         android:icon="@mipmap/ic_launcher"
10         android:label="@string/app_name"
11         android:roundIcon="@mipmap/ic_launcher_round"
12         android:supportsRtl="true"
13         android:theme="@style/AppTheme">
14         <activity android:name=".MainActivity">
15             <intent-filter>
16                 <action android:name="android.intent.action.MAIN" />
17
18                 <category android:name="android.intent.category.LAUNCHER" />
19             </intent-filter>
20         </activity>
21         <activity android:name=".DetailActivity"></activity>
22     </application>
23
24 </manifest>

原文地址：https://www.cnblogs.com/hemeiwolong/p/12608946.html