Android TextView, that allows changing the letter spacing of the text. @author: Pedro Barros

LetterSpacingTextView.java

 /**
 * Text view that allows changing the letter spacing of the text.
 * 
 * @author Pedro Barros (pedrobarros.dev at gmail.com)
 * @since May 7, 2013
 */
 public static class LetterSpacingTextView extends TextView {
        private float spacing = Spacing.NORMAL;
        private CharSequence originalText = "";

        public LetterSpacingTextView(Context context) {
            super(context);
        }

        public LetterSpacingTextView(Context context, AttributeSet attrs) {
            super(context, attrs);
        }

        public LetterSpacingTextView(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
        }

        public float getSpacing() {
            return this.spacing;
        }

        public void setSpacing(float spacing) {
            this.spacing = spacing;
            applySpacing();
        }

        @Override
        public void setText(CharSequence text, BufferType type) {
            originalText = text;
            applySpacing();
        }

        @Override
        public CharSequence getText() {
            return originalText;
        }

        private void applySpacing() {
            if (this == null || this.originalText == null) return;
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < originalText.length(); i++) {
                builder.append(originalText.charAt(i));
                if (i + 1 < originalText.length()) {
                    builder.append("\u00A0");
                }
            }
            SpannableString finalText = new SpannableString(builder.toString());
            if (builder.toString().length() > 1) {
                for (int i = 1; i < builder.toString().length(); i += 2) {
                    finalText.setSpan(new ScaleXSpan((spacing + 1) / 10), i, i + 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                }
            }
            super.setText(finalText, BufferType.SPANNABLE);
        }

        public class Spacing {
            public final static float NORMAL = 0;
        }
    }