On Page 49 whenever I am told to copy and paste the arrow left and arrow right icon to add to the button, I get nothing after I copy the 4 directories from the folders from where the solutions are hosted. I can copy and my pc informs me that the material is copied but when I paste in “app/source/main/res” I get nothing.
If you’re not having success doing this in Android Studio, you could do the same thing in your file explorer on the computer. Navigate to your project directory and manually copy the files over.