Java Code Examples for android.text.style.CharacterStyle

public void invalidateSpannables() {
    log("invalidating all spannables -- consider everything nullified");
    final Spannable spans = getText();
    final String text = spans.toString();

    // Remove existing spans
    for (CharacterStyle style : mSpans) {
        spans.removeSpan(style);
    }

    // Loop over the text, looking for new spans
    for (int i = 0; i < text.length(); i++) {
        for (SpanComponent component : mComponents) {
            String equation = component.parse(text.substring(i));
            if (equation != null) {
                MathSpannable span = component.getSpan(equation);
                spans.setSpan(span, i, i + equation.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                i += equation.length();
                break;
            }
        }
    }

    setSelection(getSelectionStart());
}
 

/**
 * Given either a Spannable String or a regular String and a token, apply
 * the given CharacterStyle to the span between the tokens.
 * <p>
 * NOTE: This method was adapted from:
 * http://www.androidengineer.com/2010/08/easy-method-for-formatting-android.html
 * <p>
 * <p>
 * For example, {@code setSpanBetweenTokens("Hello ##world##!", "##", new
 * ForegroundColorSpan(0xFFFF0000));} will return a CharSequence {@code
 * "Hello world!"} with {@code world} in red.
 */
private CharSequence setSpanBetweenTokens(CharSequence text, String token,
                                          CharacterStyle... cs) {
    // Start and end refer to the points where the span will apply
    int tokenLen = token.length();
    int start = text.toString().indexOf(token) + tokenLen;
    int end = text.toString().indexOf(token, start);

    if (start > -1 && end > -1) {
        // Copy the spannable string to a mutable spannable string
        SpannableStringBuilder ssb = new SpannableStringBuilder(text);
        for (CharacterStyle c : cs)
            ssb.setSpan(c, start, end, 0);
        text = ssb;
    }
    return text;
}
 

void setBold(boolean isBold) {
    int index = getSelectionIndex();
    if (index >= 0 && index < mSections.size()) {
        mSections.get(index).setBold(isBold);
    }
    Editable edit = getEditableText();
    int star = getSectionStart();
    int end = getSectionEnd();
    if (isBold) {
        edit.setSpan(new StyleSpan(Typeface.BOLD),
                star,
                end,
                Typeface.BOLD);
    } else {
        StyleSpan[] styleSpans = edit.getSpans(star,
                end, StyleSpan.class);
        for (CharacterStyle span : styleSpans) {
            if (span instanceof StyleSpan && ((StyleSpan) span).getStyle() == Typeface.BOLD)
                edit.removeSpan(span);
        }
    }
}
 

void setItalic(boolean isItalic) {
    int index = getSelectionIndex();
    if (index >= 0 && index < mSections.size()) {
        mSections.get(index).setItalic(isItalic);
    }
    Editable edit = getEditableText();
    int star = getSectionStart();
    int end = getSectionEnd();
    if (isItalic) {
        edit.setSpan(new StyleSpan(Typeface.ITALIC),
                star,
                end,
                Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
    } else {
        StyleSpan[] styleSpans = edit.getSpans(star,
                end, StyleSpan.class);
        for (CharacterStyle span : styleSpans) {
            if (span instanceof StyleSpan && ((StyleSpan) span).getStyle() == Typeface.ITALIC)
                edit.removeSpan(span);
        }
    }
}
 

void setItalic(boolean isItalic, int index) {
    if (index >= 0 && index < mSections.size()) {
        mSections.get(index).setItalic(isItalic);
    }
    Editable edit = getEditableText();
    int star = getSectionStart();
    int end = getSectionEnd();
    if (isItalic) {
        edit.setSpan(new StyleSpan(Typeface.ITALIC),
                star,
                end,
                Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
    } else {
        StyleSpan[] styleSpans = edit.getSpans(star,
                end, StyleSpan.class);
        for (CharacterStyle span : styleSpans) {
            if (span instanceof StyleSpan && ((StyleSpan) span).getStyle() == Typeface.ITALIC)
                edit.removeSpan(span);
        }
    }
}
 

void setBold(boolean isBold, int index) {
    if (index >= 0 && index < mSections.size()) {
        mSections.get(index).setBold(isBold);
    }
    Editable edit = getEditableText();
    int star = getSectionStart(index);
    int end = getSectionEnd(index);
    if (star >= end)
        return;
    if (isBold) {
        edit.setSpan(new StyleSpan(Typeface.BOLD),
                star,
                end,
                Typeface.BOLD);
    } else {
        StyleSpan[] styleSpans = edit.getSpans(star,
                end, StyleSpan.class);
        for (CharacterStyle span : styleSpans) {
            if (span instanceof StyleSpan && ((StyleSpan) span).getStyle() == Typeface.BOLD)
                edit.removeSpan(span);
        }
    }
}
 

public static <A extends CharacterStyle, B extends CharacterStyle> Spannable replaceAll(Spanned original,
                                                                                        Class<A> sourceType,
                                                                                        SpanConverter<A, B> converter,
                                                                                        final ClickSpan.OnClickListener listener) {
    SpannableString result = new SpannableString(original);
    A[] spans = result.getSpans(0, result.length(), sourceType);

    for (A span : spans) {
        int start = result.getSpanStart(span);
        int end = result.getSpanEnd(span);
        int flags = result.getSpanFlags(span);

        result.removeSpan(span);
        result.setSpan(converter.convert(span, listener), start, end, flags);
    }

    return (result);
}
 

/**
 * 检查当前位置是否命中在spannable上, 如果是, 返回spannable的start position
 */
private int findStartPosition(Spannable spannable, int startWidthPosition) {
    CharacterStyle[] oldSpans = spannable.getSpans(startWidthPosition, spannable.length(), CharacterStyle.class);
    int position = startWidthPosition;
    for (CharacterStyle oldSpan : oldSpans) {
        int spanStart = spannable.getSpanStart(oldSpan);
        int spanEnd = spannable.getSpanEnd(oldSpan);

        if (spanStart <= startWidthPosition && spanEnd > startWidthPosition) {
            position = spanStart;
        }

        if (spanStart >= startWidthPosition) {
            spannable.removeSpan(oldSpan);
        }
    }
    //L.e("call: findStartPosition([spannable, startWidthPosition]) " + startWidthPosition + " -> " + position);
    return position;
}
 

/**
 * Given either a Spannable String or a regular String and a token, apply
 * the given CharacterStyle to the span between the tokens.
 * <p/>
 * NOTE: This method was adapted from:
 * http://www.androidengineer.com/2010/08/easy-method-for-formatting-android.html
 * <p/>
 * <p/>
 * For example, {@code setSpanBetweenTokens("Hello ##world##!", "##", new
 * ForegroundColorSpan(0xFFFF0000));} will return a CharSequence {@code
 * "Hello world!"} with {@code world} in red.
 */
private CharSequence setSpanBetweenTokens(CharSequence text, String token,
                                          CharacterStyle... cs) {
    // Start and end refer to the points where the span will apply
    int tokenLen = token.length();
    int start = text.toString().indexOf(token) + tokenLen;
    int end = text.toString().indexOf(token, start);

    if (start > -1 && end > -1) {
        // Copy the spannable string to a mutable spannable string
        SpannableStringBuilder ssb = new SpannableStringBuilder(text);
        for (CharacterStyle c : cs)
            ssb.setSpan(c, start, end, 0);
        text = ssb;
    }
    return text;
}
 

/**
 * Convert a spanned text within a paragraph
 */
private void withinParagraph(final Spanned text, int start, int end) {
    // create sorted set of CharacterStyles
    SortedSet<CharacterStyle> sortedSpans = new TreeSet<>(new Comparator<CharacterStyle>() {
        @Override
        public int compare(CharacterStyle s1, CharacterStyle s2) {
            int start1 = text.getSpanStart(s1);
            int start2 = text.getSpanStart(s2);
            if (start1 != start2)
                return start1 - start2;        // span which starts first comes first

            int end1 = text.getSpanEnd(s1);
            int end2 = text.getSpanEnd(s2);
            if (end1 != end2) return end2 - end1;                // longer span comes first

            // if the paragraphs have the same span [start, end] we compare their name
            // compare the name only because local + anonymous classes have no canonical name
            return s1.getClass().getName().compareTo(s2.getClass().getName());
        }
    });
    List<CharacterStyle> spanList = Arrays.asList(text.getSpans(start, end, CharacterStyle.class));
    sortedSpans.addAll(spanList);

    // process paragraphs/divs
    convertText(text, start, end, sortedSpans);
}
 

private void handleEndTag(CharacterStyle style) {
    if (style instanceof URLSpan) {
        mOut.append("</a>");
    } else if (style instanceof TypefaceSpan) {
        mOut.append("</font>");
    } else if (style instanceof ForegroundColorSpan) {
        mOut.append("</font>");
    } else if (style instanceof BackgroundColorSpan) {
        mOut.append("</font>");
    } else if (style instanceof AbsoluteSizeSpan) {
        mOut.append("</font>");
    } else if (style instanceof StrikethroughSpan) {
        mOut.append("</strike>");
    } else if (style instanceof SubscriptSpan) {
        mOut.append("</sub>");
    } else if (style instanceof SuperscriptSpan) {
        mOut.append("</sup>");
    } else if (style instanceof UnderlineSpan) {
        mOut.append("</u>");
    } else if (style instanceof BoldSpan) {
        mOut.append("</b>");
    } else if (style instanceof ItalicSpan) {
        mOut.append("</i>");
    }
}
 

private void init(CharSequence source, int start, int end) {
    int initial = 20;
    mSpans = new Object[initial];
    mSpanData = new int[initial * 3];

    if (source instanceof Spanned) {
        Spanned sp = (Spanned) source;
        for (Object span : sp.getSpans(start, end, Object.class)) {
            if (span instanceof CharacterStyle || span instanceof ParagraphStyle) {
                int st = sp.getSpanStart(span);
                int en = sp.getSpanEnd(span);
                int fl = sp.getSpanFlags(span);

                if (st < start) st = start;
                if (en > end) en = end;

                setSpan(span, st - start, en - start, fl);
            }
        }
    }
}
 

/**
 * Convert a spanned text within a paragraph
 */
private void withinParagraph(final Spanned text, int start, int end) {
    // create sorted set of CharacterStyles
    SortedSet<CharacterStyle> sortedSpans = new TreeSet<CharacterStyle>(new Comparator<CharacterStyle>() {
        @Override
        public int compare(CharacterStyle s1, CharacterStyle s2) {
            int start1 = text.getSpanStart(s1);
            int start2 = text.getSpanStart(s2);
            if (start1 != start2)
                return start1 - start2;        // span which starts first comes first

            int end1 = text.getSpanEnd(s1);
            int end2 = text.getSpanEnd(s2);
            if (end1 != end2) return end2 - end1;                // longer span comes first

            // if the paragraphs have the same span [start, end] we compare their name
            // compare the name only because local + anonymous classes have no canonical name
            return s1.getClass().getName().compareTo(s2.getClass().getName());
        }
    });
    List<CharacterStyle> spanList = Arrays.asList(text.getSpans(start, end, CharacterStyle.class));
    sortedSpans.addAll(spanList);

    // process paragraphs/divs
    convertText(text, start, end, sortedSpans);
}
 

private void handleEndTag(CharacterStyle style) {
    if (style instanceof URLSpan) {
        mOut.append("</a>");
    } else if (style instanceof TypefaceSpan) {
        mOut.append("</font>");
    } else if (style instanceof ForegroundColorSpan) {
        mOut.append("</font>");
    } else if (style instanceof BackgroundColorSpan) {
        mOut.append("</font>");
    } else if (style instanceof AbsoluteSizeSpan) {
        mOut.append("</font>");
    } else if (style instanceof StrikethroughSpan) {
        mOut.append("</strike>");
    } else if (style instanceof SubscriptSpan) {
        mOut.append("</sub>");
    } else if (style instanceof SuperscriptSpan) {
        mOut.append("</sup>");
    } else if (style instanceof UnderlineSpan) {
        mOut.append("</u>");
    } else if (style instanceof BoldSpan) {
        mOut.append("</b>");
    } else if (style instanceof ItalicSpan) {
        mOut.append("</i>");
    }
}
 

private void init(CharSequence source, int start, int end) {
    int initial = 20;
    mSpans = new Object[initial];
    mSpanData = new int[initial * 3];

    if (source instanceof Spanned) {
        Spanned sp = (Spanned) source;
        for (Object span : sp.getSpans(start, end, Object.class)) {
            if (span instanceof CharacterStyle || span instanceof ParagraphStyle) {
                int st = sp.getSpanStart(span);
                int en = sp.getSpanEnd(span);
                int fl = sp.getSpanFlags(span);

                if (st < start) st = start;
                if (en > end) en = end;

                setSpan(span, st - start, en - start, fl);
            }
        }
    }
}
 

/**
     * {@inheritDoc}
     * @param s
     */
    @Override
    public void afterTextChanged(Editable s) {
        for (CharacterStyle style: mLastStyle) {
            s.removeSpan(style);
        }
        List<MarkdownSyntaxModel> models = MarkdownSyntaxGenerator.syntaxModelsForString(s.toString());
        if (models.size() == 0) {
            return;
        }
        mLastStyle.clear();
        for (MarkdownSyntaxModel model : models) {
            MarkdownSyntaxType type = model.getSyntaxType();
            Range range = model.getRange();
//            CharacterStyle style = MarkdownSyntaxGenerator.styleFromSyntaxType(type);
            int low = range.getLower();
            int upper = range.getUpper();
//            mLastStyle.add(style);
//            s.setSpan(style, low, upper, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
    }
 

public static SpannableStringBuilder highlight(String text, String target) {
    SpannableStringBuilder spannable = new SpannableStringBuilder(text);
    CharacterStyle span = null;
    for (int i = 0; i < specials.length; i++) {
        if (target.contains(specials[i])) {
            target = target.replace(specials[i], "\\" + specials[i]);
        }
    }
    Pattern p = Pattern.compile(target.toLowerCase());
    Matcher m = p.matcher(text.toLowerCase());
    while (m.find()) {
        span = new ForegroundColorSpan(Color.rgb(253, 113, 34));// 需要重复！
        spannable.setSpan(span, m.start(), m.end(),
                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    }
    return spannable;
}
 

/**
 * Replace the control codes
 *
 * @param m
 * @param ssb
 * @param style
 */
private static void replaceControlCodes(Matcher m, SpannableStringBuilder ssb, CharacterStyle style) {
  ArrayList<Integer> toremove = new ArrayList<Integer>();

  while ( m.find() ) {
    toremove.add(0, m.start());
    // Remove the ending control character unless it's \x0F
    if( m.group(2) != null && m.group(2) != m.group(3) ) {
      toremove.add(0, m.end() - 1);
    }
    ssb.setSpan(style, m.start(), m.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
  }

  for( Integer i : toremove ) {
    ssb.delete(i, i + 1);
  }
}
 

/**
 * Convert a spanned text within a paragraph
 */
private void withinParagraph(final Spanned text, int start, int end) {
    // create sorted set of CharacterStyles
    SortedSet<CharacterStyle> sortedSpans = new TreeSet<CharacterStyle>(new Comparator<CharacterStyle>() {
        @Override
        public int compare(CharacterStyle s1, CharacterStyle s2) {
            int start1 = text.getSpanStart(s1);
            int start2 = text.getSpanStart(s2);
            if (start1 != start2)
                return start1 - start2;        // span which starts first comes first

            int end1 = text.getSpanEnd(s1);
            int end2 = text.getSpanEnd(s2);
            if (end1 != end2) return end2 - end1;                // longer span comes first

            // if the paragraphs have the same span [start, end] we compare their name
            // compare the name only because local + anonymous classes have no canonical name
            return s1.getClass().getName().compareTo(s2.getClass().getName());
        }
    });
    List<CharacterStyle> spanList = Arrays.asList(text.getSpans(start, end, CharacterStyle.class));
    sortedSpans.addAll(spanList);

    // process paragraphs/divs
    convertText(text, start, end, sortedSpans);
}
 

private void handleEndTag(CharacterStyle style) {
    if (style instanceof URLSpan) {
        mOut.append("</a>");
    } else if (style instanceof TypefaceSpan) {
        mOut.append("</font>");
    } else if (style instanceof ForegroundColorSpan) {
        mOut.append("</font>");
    } else if (style instanceof BackgroundColorSpan) {
        mOut.append("</font>");
    } else if (style instanceof AbsoluteSizeSpan) {
        mOut.append("</font>");
    } else if (style instanceof StrikethroughSpan) {
        mOut.append("</strike>");
    } else if (style instanceof SubscriptSpan) {
        mOut.append("</sub>");
    } else if (style instanceof SuperscriptSpan) {
        mOut.append("</sup>");
    } else if (style instanceof UnderlineSpan) {
        mOut.append("</u>");
    } else if (style instanceof BoldSpan) {
        mOut.append("</b>");
    } else if (style instanceof ItalicSpan) {
        mOut.append("</i>");
    }
}
 

private void init(CharSequence source, int start, int end) {
    int initial = 20;
    mSpans = new Object[initial];
    mSpanData = new int[initial * 3];

    if (source instanceof Spanned) {
        Spanned sp = (Spanned) source;
        for (Object span : sp.getSpans(start, end, Object.class)) {
            if (span instanceof CharacterStyle || span instanceof ParagraphStyle) {
                int st = sp.getSpanStart(span);
                int en = sp.getSpanEnd(span);
                int fl = sp.getSpanFlags(span);

                if (st < start) st = start;
                if (en > end) en = end;

                setSpan(span, st - start, en - start, fl);
            }
        }
    }
}
 

@Override
public int getSize(@NonNull Rect outRect, @NonNull Paint paint, CharSequence text, @IntRange(from = 0) int start, @IntRange(from = 0) int end, @Nullable Paint.FontMetricsInt fm) {
    int width = super.getSize(outRect, paint, text, start, end, fm);
    if (styles != null) {
        for (CharacterStyle style : styles) {
            if (style instanceof SupportSpan) {
                width = Math.max(width, ((SupportSpan) style).getSize(frame, paint, text, start, end, fm));
            } else if (style instanceof ReplacementSpan) {
                width = Math.max(width, ((ReplacementSpan) style).getSize(paint, text, start, end, fm));
            } else if (paint instanceof TextPaint) {
                if (style instanceof MetricAffectingSpan) {
                    ((MetricAffectingSpan) style).updateMeasureState((TextPaint) paint);
                }
            }
        }
    }
    frame.right = width;
    return width;
}
 

@Override
public int getSize(@NonNull Paint paint, CharSequence text, @IntRange(from = 0) int start, @IntRange(from = 0) int end, @Nullable Paint.FontMetricsInt fm) {
    width = 0;
    for (CharacterStyle style : styles) {
        if (style instanceof ReplacementSpan) {
            width = Math.max(width, ((ReplacementSpan) style).getSize(paint, text, start, end, fm));
        } else if (paint instanceof TextPaint) {
            if (style instanceof MetricAffectingSpan) {
                ((MetricAffectingSpan) style).updateMeasureState((TextPaint) paint);
            }
        }
    }
    if (fm != null) {
        paint.getFontMetricsInt(fm);
    }
    paint.getFontMetricsInt(fontMetricsInt);
    width = Math.max(width, (int) Math.ceil(paint.measureText(text, start, end)));
    frame.right = width;
    frame.top = fontMetricsInt.top;
    frame.bottom = fontMetricsInt.bottom;
    if (bitmap == null) {
        bitmap = Bitmap.createBitmap(width, frame.bottom - frame.top, Bitmap.Config.ARGB_8888);
        bitmapCanvas = new Canvas(bitmap);
    }
    return width;
}
 

@Override
        public void draw(@NonNull Canvas canvas, CharSequence text, @IntRange(from = 0) int start, @IntRange(from = 0) int end, float x, int top, int y, int bottom, @NonNull Paint paint) {
//            bitmapCanvas.drawColor(Color.GRAY, PorterDuff.Mode.CLEAR);
            int color = /*paint instanceof TextPaint ? ((TextPaint) paint).bgColor :*/ paint.getColor();
            bitmapCanvas.drawColor(color);
            for (CharacterStyle style : styles) {
                if (style instanceof ReplacementSpan) {
                    ((ReplacementSpan) style).draw(bitmapCanvas, text, start, end, 0, top, y, bottom, paint);
                } else if (paint instanceof TextPaint) {
                    style.updateDrawState((TextPaint) paint);
                }
            }
            paint.setXfermode(xfermode);
            bitmapCanvas.drawText(text, start, end, 0, y, paint);
            canvas.drawBitmap(bitmap, x, 0, null);
        }
 

/**
 * Convert a spanned text within a paragraph
 */
private void withinParagraph(final Spanned text, int start, int end) {
    // create sorted set of CharacterStyles
    SortedSet<CharacterStyle> sortedSpans = new TreeSet<>((s1, s2) -> {
        int start1 = text.getSpanStart(s1);
        int start2 = text.getSpanStart(s2);
        if (start1 != start2)
            return start1 - start2;        // span which starts first comes first

        int end1 = text.getSpanEnd(s1);
        int end2 = text.getSpanEnd(s2);
        if (end1 != end2) return end2 - end1;                // longer span comes first

        // if the paragraphs have the same span [start, end] we compare their name
        // compare the name only because local + anonymous classes have no canonical name
        return s1.getClass().getName().compareTo(s2.getClass().getName());
    });
    List<CharacterStyle> spanList = Arrays.asList(text.getSpans(start, end, CharacterStyle.class));
    sortedSpans.addAll(spanList);

    // process paragraphs/divs
    convertText(text, start, end, sortedSpans);
}
 

private void handleEndTag(CharacterStyle style) {
    if (style instanceof URLSpan) {
        mOut.append("</a>");
    } else if (style instanceof TypefaceSpan) {
        mOut.append("</font>");
    } else if (style instanceof ForegroundColorSpan) {
        mOut.append("</font>");
    } else if (style instanceof BackgroundColorSpan) {
        mOut.append("</font>");
    } else if (style instanceof AbsoluteSizeSpan) {
        mOut.append("</font>");
    } else if (style instanceof StrikethroughSpan) {
        mOut.append("</strike>");
    } else if (style instanceof SubscriptSpan) {
        mOut.append("</sub>");
    } else if (style instanceof SuperscriptSpan) {
        mOut.append("</sup>");
    } else if (style instanceof UnderlineSpan) {
        mOut.append("</u>");
    } else if (style instanceof BoldSpan) {
        mOut.append("</b>");
    } else if (style instanceof ItalicSpan) {
        mOut.append("</i>");
    }
}
 

private void init(CharSequence source, int start, int end) {
    int initial = 20;
    mSpans = new Object[initial];
    mSpanData = new int[initial * 3];

    if (source instanceof Spanned) {
        Spanned sp = (Spanned) source;
        for (Object span : sp.getSpans(start, end, Object.class)) {
            if (span instanceof CharacterStyle || span instanceof ParagraphStyle) {
                int st = sp.getSpanStart(span);
                int en = sp.getSpanEnd(span);
                int fl = sp.getSpanFlags(span);

                if (st < start) st = start;
                if (en > end) en = end;

                setSpan(span, st - start, en - start, fl);
            }
        }
    }
}
 

private void writeStyles(CharacterStyle styles[], DataOutputStream dos) throws IOException {
        dos.writeInt(styles.length);

        for(CharacterStyle characterStyle : styles) {
            writeSingleCharacterStyle(characterStyle,dos);
//            if (characterStyle.getUnderlying()!=null) {
//                CharacterStyle underLying = characterStyle.getUnderlying();
//                if (!mWrittenTags.containsKey(underLying)) {
//                    writeSingleCharacterStyle(underLying,dos);
//                }
//                int writtenTag = mWrittenTags.get(underLying);
//                dos.writeInt(-2);
//                dos.writeInt(writtenTag);
//            } else {
//
//            }
            dos.writeInt(0xf00f); // sync mark
        }
        dos.writeInt(0xf00e); // sync mark
    }
 

public static <A extends CharacterStyle, B extends CharacterStyle> Spannable replaceAll(
        CharSequence original, Class<A> sourceType, SpanConverter<A, B> converter) {
    SpannableString result = new SpannableString(original);
    A[] spans = result.getSpans(0, result.length(), sourceType);

    for (A span : spans) {
        int start = result.getSpanStart(span);
        int end = result.getSpanEnd(span);
        int flags = result.getSpanFlags(span);

        result.removeSpan(span);
        result.setSpan(converter.convert(span), start, end, flags);
    }

    return (result);
}
 

@CalledByNative
private void populateUnderlinesFromSpans(CharSequence text, long underlines) {
    if (DEBUG_LOGS) {
        Log.i(TAG, "populateUnderlinesFromSpans: text [%s], underlines [%d]", text, underlines);
    }
    if (!(text instanceof SpannableString)) return;

    SpannableString spannableString = ((SpannableString) text);
    CharacterStyle spans[] =
            spannableString.getSpans(0, text.length(), CharacterStyle.class);
    for (CharacterStyle span : spans) {
        if (span instanceof BackgroundColorSpan) {
            nativeAppendBackgroundColorSpan(underlines, spannableString.getSpanStart(span),
                    spannableString.getSpanEnd(span),
                    ((BackgroundColorSpan) span).getBackgroundColor());
        } else if (span instanceof UnderlineSpan) {
            nativeAppendUnderlineSpan(underlines, spannableString.getSpanStart(span),
                    spannableString.getSpanEnd(span));
        }
    }
}
 

private static void setPreferenceTitleStyle(Preference preference, boolean bold, /*boolean underline,*/ boolean errorColor)
{
    if (preference != null) {
        CharSequence title = preference.getTitle();
        Spannable sbt = new SpannableString(title);
        Object spansToRemove[] = sbt.getSpans(0, title.length(), Object.class);
        for (Object span : spansToRemove) {
            if (span instanceof CharacterStyle)
                sbt.removeSpan(span);
        }
        if (bold/* || underline*/) {
            //if (bold)
                sbt.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), 0, sbt.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            /*if (underline)
                sbt.setSpan(new UnderlineSpan(), 0, sbt.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);*/
            if (errorColor)
                sbt.setSpan(new ForegroundColorSpan(Color.RED), 0, sbt.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            preference.setTitle(sbt);
        } else {
            preference.setTitle(sbt);
        }
    }
}
 

private void setTextStyle(TextView textView, boolean errorColor)
{
    if (textView != null) {
        CharSequence title = textView.getText();
        Spannable sbt = new SpannableString(title);
        Object spansToRemove[] = sbt.getSpans(0, title.length(), Object.class);
        for (Object span : spansToRemove) {
            if (span instanceof CharacterStyle)
                sbt.removeSpan(span);
        }
        if (errorColor) {
            sbt.setSpan(new ForegroundColorSpan(Color.RED), 0, sbt.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            textView.setText(sbt);
        } else {
            textView.setText(sbt);
        }
    }
}
 

private void setTitleStyle(Preference preference, boolean bold, boolean underline, boolean systemSettings)
{
    if (preference != null) {
        CharSequence title = preference.getTitle();
        if (systemSettings) {
            String s = title.toString();
            if (!s.contains("(S)"))
                title = TextUtils.concat("(S) ", title);
        }
        Spannable sbt = new SpannableString(title);
        Object spansToRemove[] = sbt.getSpans(0, title.length(), Object.class);
        for (Object span : spansToRemove) {
            if (span instanceof CharacterStyle)
                sbt.removeSpan(span);
        }
        if (bold || underline) {
            if (bold)
                sbt.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), 0, sbt.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            if (underline)
                sbt.setSpan(new UnderlineSpan(), 0, sbt.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            preference.setTitle(sbt);
        } else {
            preference.setTitle(sbt);
        }
    }
}
 

private void setTextStyle(TextView textView, boolean errorColor)
{
    if (textView != null) {
        CharSequence title = textView.getText();
        Spannable sbt = new SpannableString(title);
        Object spansToRemove[] = sbt.getSpans(0, title.length(), Object.class);
        for (Object span : spansToRemove) {
            if (span instanceof CharacterStyle)
                sbt.removeSpan(span);
        }
        if (errorColor) {
            sbt.setSpan(new ForegroundColorSpan(Color.RED), 0, sbt.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            textView.setText(sbt);
        } else {
            textView.setText(sbt);
        }
    }
}
 

/**
 * Replace the control codes
 * 
 * @param m
 * @param ssb
 * @param style
 */
private static void replaceControlCodes(Matcher m, SpannableStringBuilder ssb, CharacterStyle style)
{
    ArrayList<Integer> toremove = new ArrayList<Integer>();

    while (m.find()) {
        toremove.add(0, m.start());
        // Remove the ending control character unless it's \x0F
        if (m.group(2) != null && m.group(2) != m.group(3)) {
            toremove.add(0, m.end()-1);
        }
        ssb.setSpan(style, m.start(), m.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    }

    for (Integer i : toremove) {
        ssb.delete(i, i+1);
    }
}
 

public static <A extends CharacterStyle, B extends CharacterStyle> Spannable replaceAll(
        CharSequence original, Class<A> sourceType, SpanConverter<A, B> converter) {
    SpannableString result = new SpannableString(original);
    A[] spans = result.getSpans(0, result.length(), sourceType);

    for (A span : spans) {
        int start = result.getSpanStart(span);
        int end = result.getSpanEnd(span);
        int flags = result.getSpanFlags(span);

        result.removeSpan(span);
        result.setSpan(converter.convert(span), start, end, flags);
    }

    return (result);
}
 

public static <A extends CharacterStyle, B extends CharacterStyle> Spannable replaceAll(Spanned original,
                                                                                        Class<A> sourceType,
                                                                                        SpanConverter<A, B> converter) {
  SpannableString result=new SpannableString(original);
  A[] spans=result.getSpans(0, result.length(), sourceType);

  for (A span : spans) {
    int start=result.getSpanStart(span);
    int end=result.getSpanEnd(span);
    int flags=result.getSpanFlags(span);
    
    result.removeSpan(span);
    result.setSpan(converter.convert(span), start, end, flags);
  }

  return(result);
}
 

@Override
public int getSize(@NonNull Rect outRect, @NonNull Paint paint, CharSequence text, @IntRange(from = 0) int start, @IntRange(from = 0) int end, @Nullable Paint.FontMetricsInt fm) {
    int width = super.getSize(outRect, paint, text, start, end, fm);
    if (styles != null) {
        for (CharacterStyle style : styles) {
            if (style instanceof SupportSpan) {
                width = Math.max(width, ((SupportSpan) style).getSize(frame, paint, text, start, end, fm));
            } else if (style instanceof ReplacementSpan) {
                width = Math.max(width, ((ReplacementSpan) style).getSize(paint, text, start, end, fm));
            } else if (paint instanceof TextPaint) {
                if (style instanceof MetricAffectingSpan) {
                    ((MetricAffectingSpan) style).updateMeasureState((TextPaint) paint);
                }
            }
        }
    }
    frame.right = width;
    return width;
}
 

@Override
public int getSize(@NonNull Paint paint, CharSequence text, @IntRange(from = 0) int start, @IntRange(from = 0) int end, @Nullable Paint.FontMetricsInt fm) {
    width = 0;
    for (CharacterStyle style : styles) {
        if (style instanceof ReplacementSpan) {
            width = Math.max(width, ((ReplacementSpan) style).getSize(paint, text, start, end, fm));
        } else if (paint instanceof TextPaint) {
            if (style instanceof MetricAffectingSpan) {
                ((MetricAffectingSpan) style).updateMeasureState((TextPaint) paint);
            }
        }
    }
    if (fm != null) {
        paint.getFontMetricsInt(fm);
    }
    paint.getFontMetricsInt(fontMetricsInt);
    width = Math.max(width, (int) Math.ceil(paint.measureText(text, start, end)));
    frame.right = width;
    frame.top = fontMetricsInt.top;
    frame.bottom = fontMetricsInt.bottom;
    if (bitmap == null) {
        bitmap = Bitmap.createBitmap(width, frame.bottom - frame.top, Bitmap.Config.ARGB_8888);
        bitmapCanvas = new Canvas(bitmap);
    }
    return width;
}
 

@Override
        public void draw(@NonNull Canvas canvas, CharSequence text, @IntRange(from = 0) int start, @IntRange(from = 0) int end, float x, int top, int y, int bottom, @NonNull Paint paint) {
//            bitmapCanvas.drawColor(Color.GRAY, PorterDuff.Mode.CLEAR);
            int color = /*paint instanceof TextPaint ? ((TextPaint) paint).bgColor :*/ paint.getColor();
            bitmapCanvas.drawColor(color);
            for (CharacterStyle style : styles) {
                if (style instanceof ReplacementSpan) {
                    ((ReplacementSpan) style).draw(bitmapCanvas, text, start, end, 0, top, y, bottom, paint);
                } else if (paint instanceof TextPaint) {
                    style.updateDrawState((TextPaint) paint);
                }
            }
            paint.setXfermode(xfermode);
            bitmapCanvas.drawText(text, start, end, 0, y, paint);
            canvas.drawBitmap(bitmap, x, 0, null);
        }