using Android handler as a timer to check a condition

androidHandlerRecursiveChecker.java

    private Runnable runnable;
    private Handler handler;
    private boolean condition;


            runnable = () -> {
                if (condition) {
                        handler.removeCallbacks(runnable); //stop handler
                } else {
                    handler.postDelayed(runnable, 500); //check a condition every half a second (until condition is met)
                }
            };
            handler.post(runnable);

/// some where in your code this conditin needs to get updated i.e condition = true; (other wise this check will go forever ;)