Java – I get 0.0 every time I divide

I’m trying to make an app that distributes bills between people, but it always gives me 0.0 whenever I try to divide two numbers in the code. Why is that?

The code is as follows:

public class MainActivity extends Activity {
    public int x = 0;
    public double y = 1.00;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

Button
        Button btn = (Button) findViewById(R.id.button);

EditText
        EditText nop = (EditText) findViewById(R.id.editText);
        EditText cob = (EditText) findViewById(R.id.editText2);

try{
            x = Integer.valueOf(nop.getText().toString());
        } catch (NumberFormatException e) {
            x = 0;
        }

try{
            y = Double.valueOf(cob.getText().toString());
        } catch (NumberFormatException e) {
            y = 1.00;
        }

TextView
        final TextView tv = (TextView) findViewById(R.id.textView);

btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

Double z = (y / x);
                tv.setText("You will each pay:" + (z));
            }
        });

}
    }

My guess is that you don’t evaluate these values after clicking. Your try/catch code should be in the onclick method.