How to Add Subscripts and Superscripts to Strings in Android?

Subscript and Superscript a String in Android

In Android, you can enhance the display of strings by adding subscripts or superscripts. While external libraries offer convenient solutions, this can be achieved natively without their use.

To display a subscript, use the HTML code "_text". For superscripts, use "^text". To render these tags in a TextView, convert the string to HTML using the Html.fromHtml() method.

For example, to display "X²" in a TextView, you would use the following code:

((TextView)findViewById(R.id.text)).setText(Html.fromHtml("X<sup>2</sup>"));

Alternatively, you can apply formatting styles to specific characters within the string using the SpannableStringBuilder class. This approach provides more customization options, such as specifying different font sizes or colors for the subscript or superscript.

Here's how you could do it using a SpannableStringBuilder:

SpannableStringBuilder builder = new SpannableStringBuilder("X²");
builder.setSpan(new SuperscriptSpan(), 1, 2, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
((TextView)findViewById(R.id.text)).setText(builder);

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