环境

Gradle Plugin 7.0.3
Gradle 7.0.2
JDK 13.0.1
Android Studio Arctic Fox

使用

可以设置点击事件然后实现sendNotification逻辑，点击通知栏后跳转到新的Activity
设置通知的步骤如下
0.获取NOTIFICATION_SERVICE服务
1.设置NotificationChannel
2.为NotificationManager创建渠道
3.设置Notification.Builder
4.Build & notify

        private void sendNotification(){
            String CHANNEL_ID = "channel_id";
            String CHANNEL_NAME = "channel_name";
            int NOTIFY_ID = 1;
            Bitmap bigBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.test);
            NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
                NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ID,CHANNEL_NAME,
                        NotificationManager.IMPORTANCE_DEFAULT);
                notificationManager.createNotificationChannel(notificationChannel);
                Notification.Builder builder = new Notification.Builder(this,CHANNEL_ID);
                Intent intent = new Intent(UIActivity.this, NotificationActivity.class);
                PendingIntent pit = PendingIntent.getActivity(this,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
                builder.setContentTitle("通知的标题")
                        .setContentText("通知的内容")
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setLargeIcon(bigBitmap)
                        .setContentIntent(pit);
                Notification notification = builder.build();
                notificationManager.notify(NOTIFY_ID, notification);
            }
        }

其中通过NOTIFY_ID来取消Notification

 notificationManager.cancel(NOTIFY_ID);

除了上述代码中的属性，Notification.Builder还有许多可设置的属性

                    .setSubText("子内容")                          //内容下面的一小段文字
                    .setWhen(System.currentTimeMillis())           //设置通知时间
                    .setAutoCancel(true)                           //设置点击后取消Notification