Regarding understanding Android resource folder

Issue

I make a research, and I delve deep into Android resources files. According to this link, it says that Android externalize and separate users' resources from the code to allow using these resources by Ids that will be generated in R.class, here is the text:

Once you externalize your application resources, you can access them using resource IDs that are generated in your project's R class.

(1): Does being the 'res' folder exists means generating the R.java class? In other words, is R.java a representation to "ids" assigned to any values inside 'res' folder?

(2): Is it possible to place my 'layout' or 'string' files in any other folders aside from 'res'?

Solution

Is R.java a representation to "ids" assigned to any values inside 'res' folder?

It is most likely the idea of R.java.

Is it possible to place my 'layout' or 'string' files in any other folders aside from 'res'?

Yes you can do that but before you start make sure you checked the project structure view and not the other options like android structure view.

In your build.gradle

android {
   ....

   sourceSets {
        main {
            res.srcDirs = [
                    "src/main/module-res/compose"
            ];
        }
    }

}

Then create the desired directory similar to what you have declared. Here is an example image showing that it will work.

What's good about it is that you can make more res folder (just add it in the array and separate it with comma). Take note that each res folder must have its own drawable, layout etc. folder.

Example:

res.srcDirs = [
               "src/main/module-res/compose",
               "src/main/module-res/design",
               "src/main/module-res/extra"
              ];

Answered By - Enzokie