i am including pictures with 4 resolutions and 2 languages, so i did the following folders:
drawable-en-hdpi
drawable-en-ldpi
drawable-en-mdpi
drawable-en-xhdpi
drawable-es-hdpi
drawable-es-ldpi
drawable-es-mdpi
drawable-es-xhdpi
...and in fact, it works, but the problem comes when I need to include some pictures that have not required language, I mean, pictures with no text. The first way was to include them in the generic drawable folder, but Android do not let me do this and finally I had to duplicate this pictures, I mean, include them inside drawable-en and drawable-es folders. I have no idea why this happens but seems like if is mandatory add all the images that are used in all languages folder.
Thanks in advance.
Put non localized images in new folders without the -en and -es suffix.
i.e.:
drawable-ldpi
drawable-mdpi
drawable-hdpi
drawable-xhdpi
drawable-xxhdpi
drawable-xxxhdpi