Question

I’m currently making a basic maths application in Android.
Program will print on std output the following text: 2 + 2 = ?

User inputs a value by pressing a button and the program will then displays 2 + 2 = 4.

I got that part to work using buttons and setText but I want to have 10 different addition questions on the same activity.

My problem is that I can’t press the same button again because it simply brings up the TextView.

Do you think drawing numbers on a canvas woukd be a better approach?

public void onClick(View v) {
    add = 4;
    display.setText("2 + 2 =" + add);
} 

Answer 1

You can change the activity of the button with a flag called answered or something to that effect. Assuming you want to cycle through your questions:

public void onClick(View v) {
// TODO Auto-generated method stub
  if (!answered)
  {
    add = getNextAnswer();
    display.setText(getCurrentQuestion() + add); 
  } else
    display.setText(getNextQuestion());
  answered=!answered;
}

This changes based on how you’re storing/generating your questions