Avoid Android drawable resource to be scaled automatically
You know, you can have drawable images in Android (e.g. /res/drawable), you normally have it rescaled automatically according to your device dpi (e.g. ldpi, mdpi, hdpi, etc). If you just don't want Android to scale it for, put your graphic files in /res/drawable-nodpi. Reference: http://blog.pseudoblue.com/2010/11/15/disable-pre-scaling-of-android-image-resources/