Android:TextView height doesn't change after shrinking the font size

Question

When I click on the button, the font size shrinks to 12. However, the result is :

Answer 1

Instead of using:

final String DOUBLE_BYTE_SPACE = "\u3000";
text.setText(text + DOUBLE_BYTE_SPACE);

Better use:

final String DOUBLE_BYTE_WORDJOINER = "\u2060";
text.setText(text + DOUBLE_BYTE_WORDJOINER);

Extra information: Word Joiner is 0 width space.