How do a simple calculator in Android? How to do it using Buttons and single edit text?

Question

I am learning Android so I want to keep things simple.

I have to add two numbers and display the result in a single editbox. To add with the second number you have stor

Answer 1

Your above code was almost correct but small logic was missed in that programming . After clicking button it will store string values into "a" its ok . After that we click on operator symbol "a" will store into "aa" variable.

example:

a="4";
aa=a;//aa="4"

//After you do like this below way .

c=Integer.parseInt(aa)+Integer.parseInt(a);
//In the above line c (storing integer values) = 4+4;
//a having "4" and aa="4".