CODEWITHSUNDEEP
androidtextviewtext-size
Ephraim
Ephraim

Reputation: 8401

how do I automatically adjust textSize in android?

I am writing an app, in which part of it displays a line of text. there are certain scenarios where that line of text will take up more than one line. the problem is that I only want it to take up one line, and when I set it up either in java or in xml to only take up one line, the text is cut off. how would I make it so that it automatically adjusts the font size of the text so that it will only take up one line without being cut off?

Upvotes: 0

Views: 2148

Answers (2)

John Leehey
John Leehey

Reputation: 22240

Use proportions along with Paint.measureText():

(text size / measureText width) = (perfectSize / screenWidth)

Solving for the perfect text size:

perfectSize = (text size / measureText width) * screenWidth;

You can find the screen width with getWindowManager().getDefaultDisplay().getWidth() from the Display class.

Turned it into a math problem!

Upvotes: 3

Matthew
Matthew

Reputation: 44919

This isn't too hard to do if you use Paint#measureText.

Basically you would start with a font height smaller than the height of your TextView and then iterate (or do a binary search) through fonts of varying sizes until you find one that measures to smaller than the width of your TextView.

It requires some implementation, as there is no "automatic" way provided by the framework.

Upvotes: 0

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