提醒通知未在 android O 及更高版本中显示

Question

我确实认真地尝试了每一种方法和每一个 sn-p，但我仍然无法在中国品牌设备上显示提示通知。

所以昨天我想为什么不再试一次，但毕竟我仍然无法显示提示通知，直到我手动将应用程序转到设置并授予应用程序的浮动权限。

现在你们中的大多数人可能会说为什么不将用户导航到设置，当他/她第一次打开应用程序时，但没有人喜欢即使有其他应用程序（我不是在谈论像 WhatsApp 这样的白名单应用程序）有 10K 的下载量可以显示抬头通知

这是我的代码，顺便说一句，我尝试设置声音、振动和灯光，但仍然没有显示抬头，是的，我在每次构建后都会卸载我的应用

    public void showNotification(View v){
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            NotificationChannel nc = new NotificationChannel("n","pop up notification", NotificationManager.IMPORTANCE_HIGH);
            nc.enableLights(true);
            nc.setLightColor(Color.BLUE);
            nc.enableVibration(true);
            nc.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
            NotificationManager nm = getSystemService(NotificationManager.class);
            nm.createNotificationChannel(nc);
        }

        Notification.Builder notification = null;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            notification = new Notification.Builder(this,"n")
                    .setContentTitle("Pop up notification")
                    .setSmallIcon(R.drawable.ic_launcher_background);
        }else{
            notification = new Notification.Builder(this)
                    .setContentTitle("Pop up notification")
//                    .setPriority(Notification.PRIORITY_MAX)
                    .setSmallIcon(R.drawable.ic_launcher_background);
        }
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(1,notification.build());
    }

Answer 1

我有两个解决方案。试一试，看看有没有用。

1. 你的实际上是这样的

    public void showNotification(){
   
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
        NotificationChannel nc = new NotificationChannel("n","pop up notification", NotificationManager.IMPORTANCE_HIGH);
        nc.enableLights(true);
        nc.setLightColor(Color.BLUE);
        nc.enableVibration(true);
        nc.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
        NotificationManager nm = getSystemService(NotificationManager.class);
        nm.createNotificationChannel(nc);
    }
   
    Notification.Builder notification = null;
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
        notification = new Notification.Builder(this,"n")
                .setContentTitle("Pop up notification")
                .setSmallIcon(R.drawable.alex);
    }else{
        notification = new Notification.Builder(this)
                .setContentTitle("Pop up notification")
                //.setPriority(Notification.PRIORITY_MAX)
                .setSmallIcon(R.drawable.alex);
    }
    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(1,notification.build());
   

2. 我的 notifyUser("订单发货", "您的订单已到"):

    public void notifyUser(String title, String text){
    NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "notify_001");
    Intent intent = new Intent(this, ActivityToOpenWhenNotificationIsTapped.class);
    intent.setAction("android.intent.action.MAIN");
    intent.addCategory("android.intent.category.LAUNCHER");
    intent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
    intent.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
    PendingIntent activity = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle();
    bigTextStyle.setBigContentTitle(title);
    bigTextStyle.bigText(text);
    bigTextStyle.setSummaryText("Big summary text. Comment if you want.");
    builder.setAutoCancel(true);
    builder.setContentIntent(activity);
    builder.setContentTitle(title);
    builder.setContentText(text);
    builder.setPriority(1);
    builder.setSmallIcon(R.drawable.alex);
    builder.setLargeIcon(BitmapFactory.decodeResource(this.getResources(), R.drawable.alex));
    builder.setStyle(bigTextStyle);
    builder.setAutoCancel(true);
    builder.setSound(Settings.System.DEFAULT_NOTIFICATION_URI);
    builder.setGroup("Pixels");
    Notification build = builder.build();
    build.flags |= 16;
    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    if (Build.VERSION.SDK_INT >= 26) {
        String str3 = "Pixels_V1.0";
        notificationManager.createNotificationChannel(new NotificationChannel(str3, "Pixels Notification", NotificationManager.IMPORTANCE_DEFAULT));
        builder.setChannelId(str3);
    }
    int NOTIFICATION_ID =  new Random(System.currentTimeMillis()).nextInt(1000);
    notificationManager.notify(NOTIFICATION_ID, builder.build());
    }