Basically we have two options for selecting the duration of the Toast.

First is SHORT duration, which is 2 seconds and another is LONG duration that is 3.5 seconds.

We cannot change the duration of the Toast directly. To change the time of the Toast, I am using CountDownTimer class and set the toast time duration. Below is the code

private Toast myToast;
    public void showToast() {

        int toastDuration = 20000;
        myToast = Toast.makeText(this, "Toast Duration!!!!!", Toast.LENGTH_LONG);


        CountDownTimer countDownTimer;
        countDownTimer = new CountDownTimer(toastDuration, 1000 ) {
            public void onTick(long millisUntilFinished) {
                myToast.show();
            }
            public void onFinish() {
                myToast.cancel();
            }
        };


        myToast.show();
        countDownTimer.start();
    }