Android Java, setOnTouchListener delete 1 last character from string every 0.25s

I am making calculator on java. I want to make a button, which corresponds to delete the last character.<br>
If you press on it for 1 second, it starts to delete 1 character every 0.25s form EditText string.<br>

Clear button:

clear.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(operation.length() != 0){
                String s=operation.getText().toString();
                s = s.substring(0,operation.length()-1);
                operation.setText(s);}
        }
    });

Long touch idea:

clear.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                return false;
            }
        });

You can use ScheduledExecutorService to schedule Runnables at a set rate and with an initial delay. Here's how I would do it:

// Create member variables for your ExecutorService and ScheduledFuture
private ScheduledExecutorService mExecutor;
private ScheduledFuture<?> mFuture;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
final EditText editText = findViewById(R.id.textView);
final Button button = findViewById(R.id.button2);
// Set up the ExecutorService
mExecutor = Executors.newSingleThreadScheduledExecutor();
final Runnable deleteRunnable = new Runnable() {
@Override
public void run() {
// We'll use the view's post() method
// to make sure we're updating it from the correct thread
editText.post(new Runnable() {
@Override
public void run() {
String textValue = editText.getText().toString();
if(textValue.length() > 0){
// Delete the last character
textValue = textValue.substring(0, textValue.length() - 1);
Log.d("MY_LOG_TAG", textValue);
editText.setText(textValue);
}
// (Optionally)
// Keep the cursor at the end of the text
editText.setSelection(textValue.length());
}
});
}
};
button.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
switch(action){
case MotionEvent.ACTION_DOWN:
Log.d("MY_LOG_TAG", "Action down");
// Schedule the runnable with an initial delay of 1000 milliseconds
// and at a rate of 250 milliseconds
mFuture = mExecutor.scheduleAtFixedRate(deleteRunnable, 1000, 250, TimeUnit.MILLISECONDS);
break;
case MotionEvent.ACTION_UP:
Log.d("MY_LOG_TAG", "Action up");
// Cancel the scheduled runnable when the Up event is triggered
if(mFuture != null){
mFuture.cancel(false);
}
break;
}
return false;
}
});
}
@Override
protected void onDestroy() {
// Shutdown the Executor Service
mExecutor.shutdown();
super.onDestroy();
}