I making an app for tablets. and want to use a PNG file for some of the buttons. What size the button must be? Based on Android size it should be at least 48dp x 48dp and with converters 48dp is different in different sizes of android devices. This is a calculator: [Link](http://labs.rampinteractive.co.uk/android_dp_px_calculator/)

```
ldpi    @ 48.00dp   = 36.00px
mdpi    @ 48.00dp   = 48.00px
hdpi    @ 48.00dp   = 72.00px
xhdpi   @ 48.00dp   = 96.00px

```

So Should I make 4 different files for my png files with top pixels ? for example a version with 36px x 36px for the ldpi folder? or just make the biggest size like xhdpi (96px)?

Thanks in advance.