Android TextView's subscript being clipped off
The Android TextView clips off my text subscripts (see image below) even when I use android:layout_height="wrap_content" for the TextView.
Is there a fix/work-around for this?
P/S: Superscripts work fine
Note: padding doesn't work.
- I tried even adding a padding of 50dip but it did not help.
- I can use an absolute height such as 50dip but that messes everything up when I need text to wrap around.
Sample Code:
mtTextView.setText(Html.fromHtml("HC0<sub>3</sub>"));
Answer
Most answers suggest to add paddings or to use smaller sub/superscripts. These might be serviceable workarounds, but they don't really solve the problem. Ideally, we want Android to take the sub/superscript into account when calculating line height. I think I found how to do it, and I'm sharing it for people googling this issue.
SpannableStringBuilder sb = new SpannableStringBuilder("X2");
sb.setSpan(new SuperscriptSpan(), 1, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(sb, BufferType.SPANNABLE);
The trick is in BufferType.SPANNABLE. Apparently it makes TextView pay more attention to the markup and calculate line heights properly.