Question

我正在尝试显示一个倒计时的通知，直到CountDownTimer在服务中结束为止-并且工作正常，直到我将应用程序从“最近”菜单滑开。然后卡在其打开的第二个位置。我正在使用startForeground()。我究竟做错了什么？在我的OnePlus 5t和Google像素模拟器上进行了测试。

public class PersistentNotificationService extends Service {

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        showPersistentNotification();
        return Service.START_STICKY;
    }

    void showPersistentNotification() {
        Intent intent = new Intent(this, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "persistentNotification");
        builder.setAutoCancel(true)
                .setDefaults(Notification.DEFAULT_ALL)
                .setWhen(System.currentTimeMillis())
                .setAutoCancel(true)
                .setOnlyAlertOnce(true)
                .setContentIntent(pendingIntent)
                .setColor(Color.parseColor("#0097A7"))
                .setSmallIcon(R.mipmap.ic_launcher)
                .setOngoing(true)
                .setVibrate(new long[0])
                .setContentTitle("Time until period ends");

        NotificationManager notificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
        startForeground(0, builder.build());
        new CountDownTimer(30000, 1000) {

            public void onTick(long millisUntilFinished) {
                builder.setContentText(millisUntilFinished / 1000 + " seconds until period ends");
                notificationManager.notify(1, builder.build());
            }

            public void onFinish() {
                showPersistentNotification();
            }
        }.start();
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

Answer 1

好吧，毕竟，唯一的问题是当我打电话给startForeground时，我需要传递一个大于零的ID。

将此：startForeground(0, builder.build());更改为：startForeground(1, builder.build());

从最新信息中清除应用程序后，CountDownTimer无法在服务中运行吗？

1 个答案: