If you want to read an image from drawable
directory, but you have only the image name (NO the image path) you could get them from an activity
like this:
Resources res = getResources();
int resId = res.getIdentifier("MY_IMAGE", "drawable", getPackageName());
if(resId==0)
throw new Exception("drawable resource not found");
Drawable drawable = res.getDrawable(resId);
And, in your drawable
dir you will have a MY_IMAGE.png
o what else.