Inconsistency when setting TextView font size in code and in resources

Question

The official documentation does not seem to answer this, or I can\'t figure it out.

Element (nevermind the AlertDialog, it happens on any TextView as we

Answer 1

You should use setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize); because the documentation of the getDimension method states that it returns a Resource dimension value multiplied by the appropriate metric. which I understand to be the precalculated absolute px value.

That is, use:

tv.setTextSize(TypedValue.COMPLEX_UNIT_PX, getResources().getDimension(R.dimen.text_size_small));

Answer 2

Somehow this seems to fit:

XML:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <dimen name="typo14">9sp</dimen>
</resources>

Java:

setTextSize(TypedValue.COMPLEX_UNIT_SP, 9);
setTextSize(TypedValue.COMPLEX_UNIT_PX, getResources().getDimensionPixelSize(R.dimen.typo14));

Answer 3

Its a matter of sp px dpi

tv.setTextSize(14) = 14 pixels