I created a folder in res folder and it named draw2 which i will use for specisific imageviews.
Custom folders in res folder are not supported. Better  To create raw folder or asset folder
 for this purpose 
raw/ 
Arbitrary files to save in their raw form. To open these resources with a raw
InputStream, callResources.openRawResource()with the resource ID, which isR.raw.filename.
How to create assets in android studio
How to create raw in android studio
for more information The Android Project View
module-name/
    build/
    libs/
    src/
          androidTest/
          main/
                AndroidManifest.xml
                java/
                jni/
                gen/
                res/
                assets/
          test/
    build.gradle (module)
build.gradle (project)
solved How to acess new created folder in android studio?