Blog post snippet

threading_3.java

// the below code is inside a TextWatcher
// which implements the onTextChanged method
// I've simplified it to only highlight the parts we're
// interested in

private long lastChange = 0;

@Override
public void onTextChanged(final CharSequence chars,
                          int start, int before, int count) {

        // The handler is spawned from the UI thread
        new Handler().postDelayed(

            // argument 1 for postDelated = message to be sent
            new Runnable() {
                @Override
                public void run() {

                    if (noChangeInText_InTheLastFewSeconds()) {
                        searchAndPopulateListView(chars.toString());  // logic
                    }
                }
            },

            // argument 2 for postDelated = delay before execution
            300);

        lastChange = System.currentTimeMillis();
}


private boolean noChangeInText_InTheLastFewSeconds() {
    return System.currentTimeMillis() - lastChange >= 300
}