android.text.SpannableStringBuilder#getSpans ( )源码实例Demo

/**
 * Constructor.
 * @param charSequence the text which will be input to TextService. Attached spans that
 * implement {@link ParcelableSpan} will also be marshaled alongside with the text.
 * @param start the beginning of the range of text (inclusive).
 * @param end the end of the range of text (exclusive).
 * @param cookie the cookie for this TextInfo
 * @param sequenceNumber the sequence number for this TextInfo
 */
public TextInfo(CharSequence charSequence, int start, int end, int cookie, int sequenceNumber) {
    if (TextUtils.isEmpty(charSequence)) {
        throw new IllegalArgumentException("charSequence is empty");
    }
    // Create a snapshot of the text including spans in case they are updated outside later.
    final SpannableStringBuilder spannableString =
            new SpannableStringBuilder(charSequence, start, end);
    // SpellCheckSpan is for internal use. We do not want to marshal this for TextService.
    final SpellCheckSpan[] spans = spannableString.getSpans(0, spannableString.length(),
            SpellCheckSpan.class);
    for (int i = 0; i < spans.length; ++i) {
        spannableString.removeSpan(spans[i]);
    }

    mCharSequence = spannableString;
    mCookie = cookie;
    mSequenceNumber = sequenceNumber;
}
 

@Test
public void testLinkifySymbols_linkClickListener() {
    final String symbol = "TWTR";
    final String fullText = BASE_TEXT + " $" + symbol;

    final LinkClickListener mockClickListener = mock(LinkClickListener.class);

    final SymbolEntity symbolEntity = EntityFactory.newSymbolEntity(fullText, symbol);
    final FormattedTweetText formattedText = new FormattedTweetText();
    formattedText.text = fullText;
    formattedText.symbolEntities.add(FormattedUrlEntity.createFormattedUrlEntity(
            symbolEntity));

    final SpannableStringBuilder linkifiedText = (SpannableStringBuilder)
            TweetTextLinkifier.linkifyUrls(formattedText, mockClickListener, 0, 0, true,
                    true);
    final ClickableSpan[] clickables =
            linkifiedText.getSpans(symbolEntity.getStart(), symbolEntity.getEnd(),
                    ClickableSpan.class);
    assertEquals(1, clickables.length);
}
 

/**
 * @param spanText
 * @return true if have url
 */
public static final boolean hackURLSpanHasResult(SpannableStringBuilder spanText) {
    boolean result = false;
    URLSpan[] spans = spanText.getSpans(0, spanText.length(), URLSpan.class);
    // TODO URLSpan need change to ClickableSpan (GoURLSpan) , otherwise URLSpan can not click, not display underline.WHY?
    for (URLSpan span : spans) {
        int start = spanText.getSpanStart(span);
        int end = spanText.getSpanEnd(span);
        String url = span.getURL();
        if (url != null) {
            result = true;
            spanText.removeSpan(span);
            ClickableSpan span1 = new GoURLSpan(span.getURL());
            spanText.setSpan(span1, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
    }

    return result;
}
 

public SpanGetter(final CharSequence inputText,
        final Class<? extends CharacterStyle> spanType) {
    mInputText = (SpannableStringBuilder)inputText;
    final CharacterStyle[] spans =
            mInputText.getSpans(0, mInputText.length(), spanType);
    if (0 == spans.length) {
        mSpan = null;
        mStart = -1;
        mEnd = -1;
    } else if (1 == spans.length) {
        mSpan = spans[0];
        mStart = mInputText.getSpanStart(mSpan);
        mEnd = mInputText.getSpanEnd(mSpan);
    } else {
        throw new RuntimeException("Expected one span, found " + spans.length);
    }
}
 

@Test
public void testLinkifyMentions_linkClickListener() {
    final String mention = "TwitterDev";
    final String fullText = BASE_TEXT + " @" + mention;

    final LinkClickListener mockClickListener = mock(LinkClickListener.class);

    final MentionEntity mentionEntity = EntityFactory.newMentionEntity(fullText, mention);
    final FormattedTweetText formattedText = new FormattedTweetText();
    formattedText.text = fullText;
    formattedText.mentionEntities.add(FormattedUrlEntity.createFormattedUrlEntity(
            mentionEntity));

    final SpannableStringBuilder linkifiedText = (SpannableStringBuilder)
            TweetTextLinkifier.linkifyUrls(formattedText, mockClickListener, 0, 0, true,
                    true);
    final ClickableSpan[] clickables =
            linkifiedText.getSpans(mentionEntity.getStart(), mentionEntity.getEnd(),
                    ClickableSpan.class);
    assertEquals(1, clickables.length);
}
 

private void setTextViewHTML(TextView textView, String string) {
    // trim two trailing blank lines
    CharSequence sequence =
        Html.fromHtml(string.replace("<p>", "<br /><br />").replace("\n", "<br />"), null, mHTMLCodeTagHandler);
    // use Chrome custom tab if it is available
    if (mContext instanceof CommentsActivity
        && ((CommentsActivity) mContext).getChromeCustomTabsHelper() != null) {
        SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
        URLSpan[] urls = strBuilder.getSpans(0, sequence.length(), URLSpan.class);
        for (URLSpan span : urls) {
            makeLinkClickable(strBuilder, span);
        }
        textView.setText(strBuilder);
    } else {
        textView.setText(sequence);
    }
}
 

public static void setTextViewHTML(@NonNull TextView text, @NonNull String html, LinkClickableSpan listener)
{
    CharSequence sequence = HtmlCompat.fromHtml(html, HtmlCompat.FROM_HTML_MODE_LEGACY);
    SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
    URLSpan[] urls = strBuilder.getSpans(0, sequence.length(), URLSpan.class);
    for(URLSpan span : urls) {
        makeLinkClickable(strBuilder, span, listener);
    }
    text.setText(strBuilder);
    text.setMovementMethod(LinkMovementMethod.getInstance());
}
 

private void setTextViewHTML(TextView text, String html) {
    CharSequence sequence = Html.fromHtml(html.replaceAll("\n", ""));
    SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
    URLSpan[] urls = strBuilder.getSpans(0, sequence.length(), URLSpan.class);
    for (URLSpan span : urls) {
        makeLinkClickable(strBuilder, span);
    }
    text.setText(strBuilder);
    text.setMovementMethod(LinkMovementMethod.getInstance());
}
 

private static SpannableStringBuilder addBullets(Spanned htmlSpanned) {
    SpannableStringBuilder spannableBuilder = new SpannableStringBuilder(htmlSpanned);
    BulletSpan[] spans = spannableBuilder.getSpans(0, spannableBuilder.length(), BulletSpan.class);
    if (spans != null) {
        for (BulletSpan span : spans) {
            int start = spannableBuilder.getSpanStart(span);
            int end  = spannableBuilder.getSpanEnd(span);
            spannableBuilder.removeSpan(span);
            spannableBuilder.setSpan(new ImprovedBulletSpan(dip(2), dip(8), 0), start, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
        }
    }
    return spannableBuilder;
}
 

private static boolean hasAnimatedSpans(SpannableStringBuilder spannableBuilder) {
    CustomTypefaceSpan[] spans = spannableBuilder.getSpans(0, spannableBuilder.length(), CustomTypefaceSpan.class);
    for (CustomTypefaceSpan span : spans) {
        if (span.isAnimated())
            return true;
    }
    return false;
}
 

private boolean checkInCode(SpannableStringBuilder builder, int start, int end) {
    CodeSpan[] css = builder.getSpans(0, builder.length(), CodeSpan.class);
    for (CodeSpan cs : css) {
        int c_start = builder.getSpanStart(cs);
        int c_end = builder.getSpanEnd(cs);
        if (!(c_start >= end || c_end <= start)) {
            return true;
        }
    }
    return false;
}
 

/**
 * Parses String containing HTML to Android's Spannable format and displays it in this TextView.
 *
 * @param html String containing HTML, for example: "<b>Hello world!</b>"
 */
public void setHtmlFromString(String html) {
    SpannableStringBuilder spanText = (SpannableStringBuilder) Html.fromHtml(html, new UrlImageGetter(this, getContext(), mImageLoader), new HtmlTagHandler());

    URLSpan[] spans = spanText.getSpans(0, spanText.length(), URLSpan.class);
    // TODO URLSpan 必需用自定义的 ClickableSpan （DiscourseURLSpan） 替换， 否则 URLSpan不可点击， 显示也没有下划线。 WHY?
    for (URLSpan span : spans) {
        int start = spanText.getSpanStart(span);
        int end = spanText.getSpanEnd(span);
        String url = span.getURL();
        if (url != null) {
            spanText.removeSpan(span);
            ClickableSpan span1 = new DiscourseURLSpan(span.getURL());
            spanText.setSpan(span1, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
    }
    // ImageSpan[] images = spanText.getSpans(0, spanText.length(), ImageSpan.class);
    // for (ImageSpan image : images) {
    // int start = spanText.getSpanStart(image);
    // int end = spanText.getSpanEnd(image);
    // L.i("%d-%d :%s", start, end, image.getSource());
    // spanText.removeSpan(image);
    // DynamicDrawableSpan is = new DiscourseImageSpan(getContext(), image.getDrawable());
    // spanText.setSpan(is, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    //
    // }
    setText(spanText);

    // make links work
    setMovementMethod(LinkMovementMethod.getInstance());

    // no flickering when clicking textview for Android < 4
    // text.setTextColor(getResources().getColor(android.R.color.secondary_text_dark_nodisable));
}
 

private FixingResult addSpacesAroundSpansUntilFixed(SpannableStringBuilder builder, int widthMeasureSpec, int heightMeasureSpec) {

        Object[] spans = builder.getSpans(0, builder.length(), Object.class);
        List<Object> spansWithSpacesBefore = new ArrayList<Object>(spans.length);
        List<Object> spansWithSpacesAfter = new ArrayList<Object>(spans.length);

        for (Object span : spans) {
            int spanStart = builder.getSpanStart(span);
            if (isNotSpace(builder, spanStart - 1)) {
                builder.insert(spanStart, " ");
                spansWithSpacesBefore.add(span);
            }

            int spanEnd = builder.getSpanEnd(span);
            if (isNotSpace(builder, spanEnd)) {
                builder.insert(spanEnd, " ");
                spansWithSpacesAfter.add(span);
            }

            try {
                setTextAndMeasure(builder, widthMeasureSpec, heightMeasureSpec);
                return FixingResult.fixed(spansWithSpacesBefore, spansWithSpacesAfter);
            } catch (IndexOutOfBoundsException notFixed) {
            }
        }
        if (BuildConfig.DEBUG) {
            Log.d(HtmlTextView.TAG, "Could not fix the Spanned by adding spaces around spans");
        }
        return FixingResult.notFixed();
    }
 

@Test
    public void append_spanned_normal() {
        // #append is called with regular Spanned content -> spans should be added in reverse

        final SpannableStringBuilder ssb = new SpannableStringBuilder();
        for (int i = 0; i < 3; i++) {
            ssb.append(String.valueOf(i));
            ssb.setSpan(i, i, i + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        }

        assertTrue(builder.getSpans(0, builder.length()).isEmpty());

        builder.append(ssb);

        assertEquals("012", builder.toString());

        // this one would return normal order as spans are reversed here
//        final List<SpannableBuilder.Span> spans = builder.getSpans(0, builder.length());

        final SpannableStringBuilder spannableStringBuilder = builder.spannableStringBuilder();
        final Object[] spans = spannableStringBuilder.getSpans(0, builder.length(), Object.class);
        assertEquals(3, spans.length);

        for (int i = 0, length = spans.length; i < length; i++) {
            assertEquals(length - 1 - i, spans[i]);
        }
    }
 

private String getRealText(boolean saved) {
    if (saved && mMode == MODE_NONE) {
        return null;
    }
    Editable editable = getText();
    if (editable == null || editable.length() == 0) {
        return "";
    }
    SpannableStringBuilder value = new SpannableStringBuilder(editable);
    IPlaceholderSpan[] spans;
    if (mMode == MODE_NONE) {
        spans = EMPTY_SPANS;
    } else if (mMode < MODE_MASK) {
        spans =
                value.getSpans(
                        0,
                        Math.min(value.length(), mHolders[mHolders.length - 1].index),
                        IPlaceholderSpan.class);
    } else {
        spans =
                value.getSpans(
                        0,
                        Math.min(value.length(), mFormatStyle.length()),
                        IPlaceholderSpan.class);
        if (spans.length == mFormatStyle.length()) {
            return "";
        }
    }
    if (spans.length == 0) {
        if (saved) {
            value.clear();
            return null;
        }
    } else {
        clearNonEmptySpans(value, spans, false);
    }
    final String realText = value.toString();
    value.clear();
    return realText;
}
 

/**
 * An extension to {@link HtmlUtils#parseHtml(String, ColorStateList, int)} which adds Dribbble
 * specific behaviour.
 */
public static Spanned parseDribbbleHtml(
        String input,
        ColorStateList linkTextColor,
        @ColorInt int linkHighlightColor) {
    SpannableStringBuilder ssb = HtmlUtils.parseHtml(input, linkTextColor, linkHighlightColor);

    TouchableUrlSpan[] urlSpans = ssb.getSpans(0, ssb.length(), TouchableUrlSpan.class);
    for (TouchableUrlSpan urlSpan : urlSpans) {
        int start = ssb.getSpanStart(urlSpan);
        if (ssb.subSequence(start, start + 1).toString().equals("@")) {
            int end = ssb.getSpanEnd(urlSpan);
            ssb.removeSpan(urlSpan);
            HttpUrl url = HttpUrl.parse(urlSpan.getURL());
            long playerId = -1l;
            String playerUsername = null;
            try {
                playerId = Long.parseLong(url.pathSegments().get(0));
            } catch (NumberFormatException nfe) {
                playerUsername = url.pathSegments().get(0);
            }
            ssb.setSpan(new PlayerSpan(urlSpan.getURL(),
                            ssb.subSequence(start + 1, end).toString(),
                            playerId,
                            playerUsername,
                            linkTextColor,
                            linkHighlightColor),
                    start,
                    end,
                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
    }
    return ssb;
}
 

/**
 * Formats {@code node} and its descendants, appending the result
 * to {@code sb}.
 */
private void formatSubtree(AccessibilityNodeInfoCompat node,
        Editable result) {
    if (!node.isVisibleToUser()) {
        return;
    }

    BrailleRule rule = mRuleRepository.find(node);
    SpannableStringBuilder subtreeResult = new SpannableStringBuilder();
    rule.format(subtreeResult, mContext, node);
    if (rule.includeChildren(node, mContext)) {
        int childCount = node.getChildCount();
        for (int i = 0; i < childCount; ++i) {
            AccessibilityNodeInfoCompat child = node.getChild(i);
            if (child == null) {
                continue;
            }
            formatSubtree(child, subtreeResult);
            child.recycle();
        }
    }
    if (!TextUtils.isEmpty(subtreeResult)) {
        // If the node is accessibility focused, add the focus span
        // here to cover the node and its formatted children.
        // This is a fallback in case the formatting rule hasn't set
        // focus by itself.
        if (node.isAccessibilityFocused()
                && subtreeResult.getSpans(0, subtreeResult.length(),
                        DisplaySpans.FocusSpan.class).length == 0) {
            DisplaySpans.addFocus(subtreeResult, 0,
                    subtreeResult.length());
        }
        addNodeSpanForUncovered(node, subtreeResult);
        StringUtils.appendWithSpaces(result, subtreeResult);
    }
}
 

private CharSequence getClickableHtml(Spanned spannedHtml) {
    SpannableStringBuilder clickableHtmlBuilder = new SpannableStringBuilder(spannedHtml);
    URLSpan[] urls = clickableHtmlBuilder.getSpans(0, spannedHtml.length(), URLSpan.class);
    for (final URLSpan span : urls) {
        setLinkClickable(clickableHtmlBuilder, span);
        clickableHtmlBuilder.removeSpan(span);
    }
    return clickableHtmlBuilder;
}
 

@Override
public void onTextChanged(CharSequence charSequence, int start, int before, int count) {
    if (charSequence instanceof SpannableStringBuilder) {
        SpannableStringBuilder span = (SpannableStringBuilder) charSequence;
        Object[] spans = span.getSpans(0, span.length(), CharacterStyle.class);
        Iterator iterator = null;
        if (mData.get(position).getSpanList() != null) {
            iterator = mData.get(position).getSpanList().iterator();
        }
        boolean needAdd = false;
        for (int i = 0; i < spans.length; i++) {
            SpanModel model;
            if (iterator != null && iterator.hasNext()) {
                //复用原本的Model，防止重复New
                model = (SpanModel) iterator.next();
                if (model.mSpans != null) {
                    model.mSpans.clear();
                } else {
                    model.mSpans = new ArrayList<>();
                }
            } else {
                RichLog.log("NEW-------------");
                needAdd = true;
                model = new SpanModel();
            }
            model.mSpans.add(spans[i]);
            model.end = span.getSpanEnd(spans[i]);
            model.start = span.getSpanStart(spans[i]);
            for (++i; i < spans.length; i++) {
                if (span.getSpanEnd(spans[i]) == model.end && span.getSpanStart(spans[i]) == model.start) {
                    model.mSpans.add(spans[i]);
                } else {
                    i--;
                    break;
                }
            }
            if (needAdd) {
                mData.get(position).getSpanList().add(model);
            }
        }
        while (!needAdd && iterator != null && iterator.hasNext()) {
            iterator.next();
            iterator.remove();
        }
        for (SpanModel item : mData.get(position).getSpanList()) {
            Log.i(BASE_LOG, item.mSpans + "start:" + item.start + "end:" + item.end);
        }
    }
    mData.get(position).setSource(charSequence.toString());
}
 

private boolean isCached(SpannableStringBuilder ssb) {
    Cached[] cs = ssb.getSpans(0, ssb.length(), Cached.class);
    return cs != null && cs.length > 0;
}