ERROR No package identifier when getting value for resource number

Question

Both activities are in the same package

Second activity uses second layout file

setContentView(R.layout.main2);

Errors on this line

Answer 1

When you pass an integer to the TextView.setText() to be displayed android assumes it is a resource id and that's why you are getting Resource$NotFoundException. Try converting the int to String before passing it to TextView.setText(): TextView.setText(String.valueOf(i)).