FitText

CharacterWrapTextView.java

    private void refitText(String text, int textWidth) {
        if (textWidth <= 0) {
            return;
        }
        final int targetWidth = textWidth - getPaddingLeft() - getPaddingRight();
        float hi = 1f;
        float lo = 0f;

        float textWidthCalculated;
        while (hi - lo > 0.1) {
            final float size = (hi + lo) / 2;
            mTestPaint.setLetterSpacing(size);
            textWidthCalculated = mTestPaint.measureText(text, 0, text.length());
            if (textWidthCalculated >= targetWidth) {
                hi = size;
            } else {
                lo = size;
            }
        }
        setLetterSpacing(lo);
    }