Question

I need to configure a button with a code that takes the first two digits of a number (when clicked) (from a textbox) and adds a number to it; and then takes the 3rd and 4th digits and does somewhat the same to it and displays the result value in a toast message. The user inputs the original number to which the additions and subtractions must be done.

So far I have only done: Toast.makeText(TimerCodeActivity.this, String.valueOf(

After that I am just lost

Answer 1

Try something like the following:

EditText theTextBox = (EditText)findViewById(R.id.idOfTheEditText);

int digits = Integer.parseInt(theTextBox.getText().toString().subString(0,2)); // Take the first two digits 

int newnumber = digits + 4; // Add a number? Or are you trying to add like a string?

Toast.makeText(TimerCodeActivity.this, String.valueOf(newnumber), Toast.LENGTH_LONG).show();