Android Programming The Big Nerd Ranch Guide by Bill Phillips, Chris Stewart, Kristin Marsicano (z-lib.org)

Resources and resource IDs

Listing 1.5  Current GeoQuiz resource IDs (R.java)

/* AUTO-GENERATED FILE. DO NOT MODIFY.

• 
  


• This class was automatically generated by the


• aapt tool from the resource data it found. It


• should not be modified by hand.
  */

package com.bignerdranch.android.geoquiz;

public final class R {
public static final class anim {
...
}

...

public static final class id {
...
}
public static final class layout {
...
public static final int activity_quiz=0x7f030017;
}
public static final class mipmap {
public static final int ic_launcher=0x7f030000;
}
public static final class string {
...
public static final int app_name=0x7f0a0010;
public static final int false_button=0x7f0a0012;
public static final int question_text=0x7f0a0014;
public static final int true_button=0x7f0a0015;
}
}

The R.java file can be large, and much of this file is omitted from Listing 1.5.

This is where the R.layout.activity_quiz comes from – it is an integer constant named
activity_quiz within the layout inner class of R.