how to get change string “R.drawable.someimage” to an id?

Question

String path = "R.drawable.pic_" + 4;
imageOfPages.setImageResource(path);

but it needs id not String.

Answer 1

you can use

 int id = getResources().getIdentifier("pic_" + 4, "drawable", getPackageName());
 if (id > 0) {

 }

From the documentation:

  Return a resource identifier for the given resource name.