Should use “sp” instead of “dp” for text sizes

Question

When I use

android:textSizes=\"20dp\" 

in my XML for a textView, I got a warning \"Should use \"sp\" instead of <

Answer 1

You should always use SP for fonts as it respects the user preferences. Here is an example Lets understand it with the help of an example -

Text with SP and DP

Change the device text setting (Settings -> Display -> Font Size)

Now reopen the app and relook at the texts, You will see that the text which was using SP has different height than DP.