Android Calculator Error

Question

I have two questions:

1. How do I adjust the buttons in a table, like a normal calculator?
2. Whenever I click the 'equal' button the app is closing -Force Close.

I think the problem comes from the int sum=0; whenever I use it at the equal place it gives the error.

code

Answer 1

use this code it may help

display.setText(sum+"");

because you have declared sum as int and setText property accepts CharSequence

Answer 2

For adjusting buttons, use TableLayout or RelativeLayout, where you can position buttons relatively to others. Concerning second question, just change

display.setText(sum);

to

display.setText(String.valueOf(sum));

To make your calculator work at least a little bit change equal.setOnClickListener to this:

equal.setOnClickListener(new View.OnClickListener() {

                    public void onClick(View v) {
                            // TODO Auto-generated method stub

                            display.setText(String.valueOf(counter+sum));
                            counter=0;
                            sum=0;
                    }
            });