android.text.Editable#clearSpans ( )源码实例Demo

public static void reset(EditText editText) {
    final Editable editable = editText.getEditableText();
    if (TextUtils.isEmpty(editable)) {
        return;
    }
    editable.clearSpans();
    ChipDrawableSpan.apply(editText.getContext(), editable, editText.hasFocus());
}
 

public void setColoredAdContent(TextView contentText, final ForumAdJson forumAd) {
    String subject = StringUtils.get(forumAd.getContent());
    Editable editable = contentText.getEditableText();
    if (editable != null) {
        editable.clear();
        editable.clearSpans();
    }
    final String recomName = forumAd.getRecomName();
    SpannableStringBuilder ssb = new SpannableStringBuilder(subject + recomName);
    Drawable bg = context.getResources().getDrawable(R.drawable.bg_recom);
    ImageSpan imageSpan = new ImageSpan(bg) {
        @Override
        public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y,
                         int bottom, Paint paint) {
            paint.setTypeface(Typeface.DEFAULT);
            int textSize = DensityUtils.dip2px(context, 12);
            paint.setTextSize(textSize);
            Rect bounds = new Rect();
            paint.getTextBounds(text.toString(), start, end, bounds);
            getDrawable().setBounds(0, 0, bounds.width() + 10, bottom - top);
            super.draw(canvas, text, start, end, x, top, y, bottom, paint);
            paint.setColor(Color.TRANSPARENT);
            canvas.drawText(text.subSequence(start, end).toString(), x + 5, y, paint);
        }
    };
    ssb.setSpan(imageSpan, subject.length(), subject.length() + recomName.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
    contentText.setText(ssb);

}
 

public static void reset(EditText editText) {
    Editable editable = editText.getText();
    if (editable != null) {
        editable.clearSpans();
    }
    editText.setText(editable);
}
 

private Editable highlight( Editable e )
    {
        try
        {
            e.clearSpans();

            if( e.length() == 0 )
                return e;

            for( Matcher m = numbers.matcher( e );
                 m.find(); )
                e.setSpan(
                        new ForegroundColorSpan(Color.parseColor(COLOR_NUMBER)),
                        m.start(),
                        m.end(),
                        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );

            for( Matcher m = keywords.matcher( e );
                 m.find(); )
                e.setSpan(
                        new ForegroundColorSpan(Color.parseColor(COLOR_KEYWORD)),
                        m.start(),
                        m.end(),
                        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );

            for( Matcher m = variables.matcher( e );
                 m.find(); )
                e.setSpan(
                        new ForegroundColorSpan(Color.parseColor(COLOR_VARIABLE)),
                        m.start(),
                        m.end(),
                        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );

            for( Matcher m = builtins.matcher( e );
                 m.find(); )
                e.setSpan(
                        new ForegroundColorSpan( COLOR_BUILTIN ),
                        m.start(),
                        m.end(),
                        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );

            for( Matcher m = strings.matcher( e );
                 m.find(); )
                e.setSpan(
                        new ForegroundColorSpan(Color.parseColor(COLOR_STRING)),
                        m.start(),
                        m.end(),
                        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );

            for( Matcher m = comments.matcher( e );
                 m.find(); )
                e.setSpan(
                        new ForegroundColorSpan( COLOR_COMMENT ),
                        m.start(),
                        m.end(),
                        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );
        }
        catch( Exception ex )
        {
        }
//
//        e.setSpan(
//                new BackgroundColorSpan( COLOR_COMMENT ),
//                1, e.length() -1,
//                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );

//        e.setSpan(new TypefaceSpan("monospace"), 0, e.length() -1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );
        return e;
    }
 

public Editable highlight(Editable editable, boolean newText) {
    editable.clearSpans();

    if (editable.length() == 0) {
        return editable;
    }

    editorHeight = getHeight();

    if (!newText && editorHeight > 0) {
        firstVisibleIndex = getLayout().getLineStart(LineUtils.Companion.getFirstVisibleLine(MainActivity.verticalScroll, editorHeight, lineCount));
        lastVisibleIndex = getLayout().getLineEnd(LineUtils.Companion.getLastVisibleLine(MainActivity.verticalScroll, editorHeight, lineCount, deviceHeight) - 1);
    } else {
        firstVisibleIndex = 0;
        lastVisibleIndex = CHARS_TO_COLOR;
    }

    firstColoredIndex = firstVisibleIndex - (CHARS_TO_COLOR / 5);

    // normalize
    if (firstColoredIndex < 0)
        firstColoredIndex = 0;
    if (lastVisibleIndex > editable.length())
        lastVisibleIndex = editable.length();
    if (firstColoredIndex > lastVisibleIndex)
        firstColoredIndex = lastVisibleIndex;

    textToHighlight = editable.subSequence(firstColoredIndex, lastVisibleIndex);

    if (TextUtils.isEmpty(MainActivity.Companion.getFileExtension()))
        MainActivity.Companion.setFileExtension("");

    HighlightDriver highlightDriver = new HighlightDriver(new AndroidHighlightColorProvider(),
            MainActivity.Companion.getFileExtension());

    List<HighlightInfo> highlights = highlightDriver.highlightText(textToHighlight, firstColoredIndex);
    for (HighlightInfo info : highlights) {
        editable.setSpan(
                new ForegroundColorSpan(info.getColor()),
                info.getStart(),
                info.getEnd(),
                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    }

    return editable;
}