Question

I have a Button and a TextView. When I hold this Button for 1 second or so, the TextView should increment 1 by 1 in a 0.5 seconds interval.

I’m kind of lost and don’t know what I should use here. Any help is appreciated.

EDIT: I forgot to say that I have an onClick event too. When I make a small click it adds 0.1 (this is already working).

This is what I’ve come out so far.. but no results. The activity just stop working.

btnPlusPastryDosage.setOnTouchListener(new View.OnTouchListener() 
    {           
        public boolean onTouch(View arg0, MotionEvent motion) 
        {
            Handler myHandler = new Handler();                          

            Runnable runnable = new Runnable() 
            {                                               
                public void run() 
                {                       
                    String valueStr = txtPastryDosage.getText().toString();
                    valueStr = valueStr.replace(',', '.');

                    BigDecimal value = new BigDecimal(valueStr);                
                    value = value.subtract(new BigDecimal("1"));

                    if(value.doubleValue() >= 0) txtPastryDosage.setText(String.valueOf(value));                        
                }
            };

            while(motion.getAction() == MotionEvent.ACTION_DOWN)
            {
                myHandler.postDelayed(runnable, 500);
            }                                                                       

            return false;
        }
    });

Answer 1

OnClick, make a Handler to post a Runnable that sets the height and width of the button, and increments it. Save the height/width somewhere. Each post method of the handler should check if the button is still pressed. If not, remove all callbacks.

Handler: http://developer.android.com/reference/android/os/Handler.html
Runnable: http://developer.android.com/reference/java/lang/Runnable.html