Question

我试图仅从onprogress更新方法显示一次通知。有条件允许显示通知。问题是它在第一个之后继续显示通知，并且手机继续振铃和振动。我只想收到一条通知，告知某事并停止。有可能吗？有人可以帮忙，并建议其他方法。感谢。

这是我的onPorgressUpdate方法的代码：

 protected void onProgressUpdate(byte[]... values) {
         super.onProgressUpdate(values);
         String command=new String(values[0]);//get the String from the recieved bytes
         String[] parts= command.split(",");
         String part1=parts[0];
         String part2=parts[1];

         temp.setText(part1);
         humi.setText(part2);

         if(Integer.parseInt(part2)>70)
         {
            NotificationCompat.Builder builder=new NotificationCompat.Builder(this.context);
            builder.setContentTitle("AM Home Automation");
            builder.setContentText("humi");
            builder.setSmallIcon(R.drawable.ic_launcher);
            builder.setTicker("alert");
            builder.setDefaults(Notification.DEFAULT_ALL);

            notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.notify(0, builder.build());
         }

Answer 1

使用布尔值记住您已经显示通知并使用它不显示另一个如下所示：

private boolean alreadyDisplayedNotification = false;

protected void onProgressUpdate(byte[]... values) {
    super.onProgressUpdate(values);
    String command=new String(values[0]);//get the String from the recieved bytes
    String[] parts= command.split(",");
    String part1=parts[0];
    String part2=parts[1];

    temp.setText(part1);
    humi.setText(part2);

    if(Integer.parseInt(part2)>70 && !alreadyDisplayedNotification) {
        NotificationCompat.Builder builder=new NotificationCompat.Builder(this.context);
        builder.setContentTitle("AM Home Automation");
        builder.setContentText("humi");
        builder.setSmallIcon(R.drawable.ic_launcher);
        builder.setTicker("alert");
        builder.setDefaults(Notification.DEFAULT_ALL);

        notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0, builder.build());

        alreadyDisplayedNotification=true;
    }

Answer 2

您还可以在通知构建器上使用setOnlyAlertOnce（true），这只会显示抬头通知一次

Notification notification = new NotificationCompat.Builder(getActivity().getApplicationContext(),CHANNEL_ID)sensitive content.
            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentTitle("title")
            .setAutoCancel(false)
            .setDefaults(Notification.DEFAULT_ALL)
            .setPriority(notiPriority)
            .setOnlyAlertOnce(true) // set this to show and vibrate only once
            .build();

仅从onprogressupdate方法显示通知一次

2 个答案: