How can I do something, 0.5 second after text changed in my EditText?

Question

I am filtering my list using an EditText. I want to filter the list 0.5 second after user has finished typing in EditText. I used the afterTextChanged

Answer 1

Using timer for your case is not the best solution because of creating new object everytime. According to Timer documentation(http://developer.android.com/reference/java/util/Timer.html) it's better to use ScheduledThreadPoolExecutor -

"Timers schedule one-shot or recurring tasks for execution. Prefer ScheduledThreadPoolExecutor for new code."

Here is better approach

Runnable runnabledelayedTask = new Runnable(){
    @Override
    public void run(){
        //TODO perform any operation here
    }
};

editText.addTextChangedListener(
    new TextWatcher() {
        @Override public void onTextChanged(CharSequence s, int start, int before, int count) { }
        @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { }

        private final long DELAY = 500; // milliseconds

        @Override
        public void afterTextChanged(final Editable s) {
        ScheduledExecutorService scheduledPool = Executors.newScheduledThreadPool(1);
        ScheduledFuture sf = scheduledPool.schedule(callabledelayedTask, DELAY, TimeUnit.MILLISECONDS);
        //you can cancel ScheduledFuture when needed
        }
    }
);