Android String Resource Superscript and Subscript for letters

You don't really have to use html document if any of the letters you want is represented here

For "a" copy and paste this "ᵃ"

You can copy and paste any of these Superscripts and Subscripts directly into your Android String Resource.

Example:

    <string name="word_with_superscript" translatable="false">Trademark ᵀᴹ</string>

Result:Trademark ᵀᴹ

Superscript and Subscript letters

Superscript capital ᴬ ᴮ ᴰ ᴱ ᴳ ᴴ ᴵ ᴶ ᴷ ᴸ ᴹ ᴺ ᴼ ᴾ ᴿ ᵀ ᵁ ⱽ ᵂ

Superscript minuscule ᵃ ᵇ ᶜ ᵈ ᵉ ᶠ ᵍ ʰ ⁱ ʲ ᵏ ˡ ᵐ ⁿ ᵒ ᵖ ʳ ˢ ᵗ ᵘ ᵛ ʷ ˣ ʸ ᶻ

Subscript minuscule ₐ ₑ ₕ ᵢ ⱼ ₖ ₗ ₘ ₙ ₒ ₚ ᵣ ₛ ₜ ᵤ ᵥ ₓ

The HTML.fromHTML(String) was deprecated as of API 24. They say to use this one instead, which supports flags as a parameter. So to go off of the accepted answer:

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

And if you want code that considers pre-24 API's as well:

TextView textView = ((TextView)findViewById(R.id.text));
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
  textView.setText(Html.fromHtml("X<sup>2</sup>", Html.FROM_HTML_MODE_LEGACY));
} else {
    textView.setText(Html.fromHtml("X<sup>2</sup>"));    
}

This answer was derived from: https://stackoverflow.com/a/37905107/4998704

The flags and other documentation can be found here: https://developer.android.com/reference/android/text/Html.html

Based on Gerardo's answer here I created this extension on Int

fun Int.toSuperScript(): String {
    return when (this) {
        0 -> "\u2070"
        1 -> "\u00B9"
        2 -> "\u00B2"
        3 -> "\u00B3"
        4 -> "\u2074"
        5 -> "\u2075"
        6 -> "\u2076"
        7 -> "\u2077"
        8 -> "\u2078"
        9 -> "\u2079"
        else -> ""
}

}