I have problem on Android to do rainbow programmatic color on TextView. Here specific

Question

Editorial Team

Asked: June 15, 20262026-06-15T10:16:33+00:00 2026-06-15T10:16:33+00:00

I have problem on Android to do rainbow programmatic color on TextView.

Here specific condition of TextView:

String on TextView may contain character and number in unspecific order.

Example: AA11BB22, X2YY3ZZA1
For character (A-Z), I wish to display color BLUE.

For number (1-9), I wish to display color RED.

Example: AA11BB22 will display ‘AA’, ‘BB’ will display BLUE, and ’11’, ’22’ will display RED in TextView.

I know, there few solution to do solve using generate Image or HTML on canvas.

Is better or worse to do generate TextView for each chunk of part then color it?

Or maybe your guys has elegant solution for my situation.

Thanks.

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Editorial Team · Answer 1 · 2026-06-15T10:16:34+00:00

Editorial Team

You can make use of Spannable. This link will help you to understand how to use Spannable http://www.chrisumbel.com/article/android_textview_rich_text_spannablestring

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