Android Question Which screen size i should use

See "Similar Threads" above ("Supporting multiple screens").

In most cases it is better to use the default variant (320x480, scale=1) and use anchors and the designer script to implement a flexible layout.

Supporting multiple screens - tips and best practices

i sent my app to my friend having Xperia Z1,he said everything was OK ! visual and result of code.but i didn't use any "anchors or the designer script" !

i sent my app to my friend having Xperia Z1,he said everything was OK ! visual and result of code.but i didn't use any "anchors or the designer script" !

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you don't need to.. you can use anchors or the designer script to optimize the layout and place the views in code, instead of visually.. both methods work
and will be ok if you use var 320x480, scale 1. designer script will enable you to precisely and accurately place your views relative to each other or by
specifying the coordinates or percentages of their container.. also more faster.