I have been trying, for 2 days now, to simply get past the first few pages of the first chapter of Big Nerd Ranch\'s Android Programming Book.
The gist of my problem is
I had this kind of "bug" the first time I used Eclipse ADT too. In my case uninstall and reinstalling fixed the problem.
However as the comments told you, it's no big deal to have the files created automatically for you, except in the case you're totally new to Android and doesn't know what you may miss if you create the file from scratch.. which was also my case.
But in case you are still bugged by the problem then this might help. Usually these 3 files are created automatically for you, but in case they would not, then make them on your own by copy-pasting these:
AppNameHere\res\layout\activity_main.xml
AppNameHere\res\layout\fragment_main.xml
AppNameHere\src\com.anything.appnamehere\MainActivity.java
package com.anything.appnamehere;
public class MainActivity extends Activity{
}
These codes are for my app which is named com.anything.appnamehere
, please modify to suit your need.