Accessing folder/file structure to get resources

Issue

I have a folder structure inside my various drawable folders, e.g. drawable, drawable-hdpi etc.

Something like:

drawable-hdpi
├── folder_main
│   ├── sub_folder_1
│   │   ├── 1.png
│   │   └── 2.png
│   ├── sub_folder_2
│   │   ├── 1.png
│   │   └── 2.png
│   └── sub_folder_3
│       ├── 1.png
│       └── 2.png
└── ic_launcher.png

Accessing these resources will be dynamic and done programatically. I need a way to access these sub folder png resources.

Accessing the ic_launcher is straight forward using: R.drawable.ic_launcher. Logically I think you should be able to access the resource somthing like:

R.drawable.folder_main.sub_folder_1.1

But that clearly doesn't work and wouldn't work programatically where the sub folder and file is dynamic.

Thanks in advance for any pointers.

Solution

Shortly after posting my question I found this stack overflow resource:

http://www.stackoverflow.com/a/10170925/321697

This, and the answers here solved my first problem to do with folder/file structure.

Then I needed a way to process these resources. I did this as follows:

I updated the file structure to:

drawable-hdpi
    ->name_1_0.png
    ->name_1_1.png
    ->name_1_2.png
    ->name_2_0.png
etc

I then accessed the files with the following code:

int folder = 1;
int image = 0;
int resourceIdentifier = resources.getIdentifier("name_"+folder+"_"+image,"drawable","*whateveryourpackageiscalled");

Note: *whateveryourpackageiscalled = com.yourwebsite.etc

This way I get to dynamically access the image I need by altering the folder and image variables.

Answered By - HGPB