int lineHeight = textView.getLineHeight();
float add = tvSampleText.getLineSpacingExtra(); // API 16+
float mult = tvSampleText.getLineSpacingMultiplier(); // API 16+
Explicit height between lines of text. If set, this will override the values set for lineSpacingExtra and lineSpacingMultiplier.
<attr name="lineHeight" format="dimension" />