Timertask with long intervals

Question

I intend to develop an app that when setting a certain time, schedule a task with timertask to be executed 50 minutes later and soon after that 50 minutes, repeat by 50 minutes in a row. But it turns out that after 50 minutes of scheduled time, the task is not executed. But it turns out that tested with shorter times like 5 minutes, the task performs. Does timertask not accept long times? Here’s an example of what my code might be:

public void startTimer() {
        //set a new Timer
        timer = new Timer();



        //initialize the TimerTask's job
        initializeTimerTask();

        timer.schedule(timerTask, 300000, 300000); 
    }


    public void initializeTimerTask() {

        timerTask = new TimerTask() {
            public void run() {

                //use a handler to run a toast that shows the current timestamp
                handler.post(new Runnable() {
                    public void run() {
                        showNotification();
                    }
                });
            }
        };
    }