What?
A reference to what size an image background should be set to for various screen sizes.

Why?
A background image I was using was unedited at 1600x2133 (364kb) and was not displaying on smaller devices. Configuring drawables for each layout seemed to be the only solution.

res/drawable-ldpi      240x320
res/drawable-mdpi      320x480
res/drawable-hdpi      480x800
res/drawable-xhdpi     640x960
res/drawable-xxhdpi    960x1440
res/drawable-xxxhdpi   // for launcher only 640dpi
res/drawable-tvdpi     1.33*mdpi // not needed as mdpi or hdpi is used

xlarge screens are at least 960dp x 720dp large screens are at least 640dp x 480dp normal screens are at least 470dp x 320dp small screens are at least 426dp x 320dp

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