how to design any screen size and - density in Android(Multi screen for mobiles in Android)
layout compatibility is very important part of any project
sorry but you have to use dimens for handle this problem. and i think best way for design is use density.
you can use dimens-hdpi or dimens-mdpi or ...
and can use dimens-small or dimens-large or ...
and can use both of them together. like dimens-larg-mdpi
but this is so hard to design.
i using dimens smallest screen width this use density and i think you can handle all of phones or tablets by 4 or 5 dimens.
like this picture.
Typical numbers for screen width dp are:
- 320: a phone screen (240x320 ldpi, 320x480 mdpi, 480x800 hdpi, etc).
- 480: a tweener tablet like the Streak (480x800 mdpi).
- 600: a 7” tablet (600x1024).
- 720: a 10” tablet (720x1280, 800x1280, etc).
- if you have a device don't support by one of these you can add another smallest screen width for that.
you can read more details here , here , here and this help you know your phone pixels per inch.
example:
you have a phone 1080*1920 pixel and 5" size.
- first formula help you calculate pixel per inch (dpi).
- second formula help you calculate Pixel ratio.
- and last formula help you calculate dp.
this phone have 392 dp in width and smallest width for that is 320.
if you like use dpi Pixel ratio can help you.
- ldpi => Pixel ratio = 0.75
- mdpi => Pixel ratio = 1.0
- hdpi => Pixel ratio = 1.5
- xhdpi => Pixel ratio = 2
- xxhdpi => Pixel ratio = 3
- xxxhdpi => Pixel ratio = 4
if you want to support all resolution (ldpi ,mdpi ,hdpi , xhdpi , xxhdpi , xxxhdpi ) then you can put your images those folders. For text sizes its a good practice to use dimension folder. But if you do not want to use dimension folder then you can pick resolution of device programatically and change your text sizes
mipmap-hdpi, mipmap-mdpi,mipmap-xxhdpi, this folder are you that u need to use them for diffrent resolution
you can read : http://developer.android.com/guide/practices/screens_support.html