400+ Android & Flutter Code
Example code for android + flutter app developers.
Saturday, January 3, 2015
How to change TextView font size in android
TextView widget display text on android application. we can set or change TextView font size statically by declarative syntax in xml layout file or programmatically at run time in java file. even we can use an xml file source to define font size.
the following example code demonstrate us how can we define TextView font size in xml layout file and how can we uses dimens.xml to reference font size. in this example we did not changes any coding in java file, so here we only include the layout xml file and dimens.xml file.
Dimension
we defined dimension value in xml layout file as example 50sp, 20pt, 30dp. dimension is specified with a number followed by a unit of measure. android supported the following units of measure, those are dp, sp, pt, px, mm, in.
dp means Density-independent-Pixels. this is an abstract unit that is based on the physical density of the screen.
sp means Scale-independent-Pixels. SP as like dp but it is also scaled by the user’s font size preference. Sp is recommended unit for measure.
pt means Points — 1/72 of an inch based on the physical size of screen. px describe Pixels which corresponds to actual pixels on the screen. mm is Millimeters which is based on the physical size of the screen. in describe inches which also based on the physical size of the screen.
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