Question

有没有办法在Android TextView中格式化<BlockQuote> HTML标记？如果我可以使用图像，广告和多个垂直滚动页面轻松操作3列，则可以选择WebView。

文本视图显然处理标记，我得到一条丑陋的蓝线来表示blockquote。有没有办法改变线条的颜色或更好地提供我自己的线条图像？

Answer 1

如果您使用android.text.Html#fromHtml来构建android.text.Spannable，则blockquote将通过android.text.style.QuoteSpan实施。这个QuoteSpan不允许配置。

最简单的解决方案是搜索QuoteSpan中的所有Spannable并替换它们：

private void replaceQuoteSpans(Spannable spannable) {
    QuoteSpan[] quoteSpans = spannable.getSpans(0, spanned.length(), QuoteSpan.class);
    for (QuoteSpan quoteSpan : quoteSpans) {
        int start = spannable.getSpanStart(quoteSpan);
        int end = spannable.getSpanEnd(quoteSpan);
        int flags = spannable.getSpanFlags(quoteSpan);
        spannable.removeSpan(quoteSpan);
        spannable.setSpan(new CustomQuoteSpan(
                MY_BACKGROUND_COLOR,
                MY_STRIPE_COLOR,
                MY_STRIPE_WIDTH,
                MY_GAP_WIDTH),
            start,
            end,
            flags);
    }
}

使用CustomQuoteSpan类，如：

/**
 * android.text.style.QuoteSpan hard-codes the strip color and gap. :(
 */
public class CustomQuoteSpan implements LeadingMarginSpan, LineBackgroundSpan {
    private final int backgroundColor;
    private final int stripeColor;
    private final float stripeWidth;
    private final float gap;

    public CustomQuoteSpan(int backgroundColor, int stripeColor, float stripeWidth, float gap) {
        this.backgroundColor = backgroundColor;
        this.stripeColor = stripeColor;
        this.stripeWidth = stripeWidth;
        this.gap = gap;
    }

    @Override
    public int getLeadingMargin(boolean first) {
        return (int) (stripeWidth + gap);
    }

    @Override
    public void drawLeadingMargin(Canvas c, Paint p, int x, int dir, int top, int baseline, int bottom,
                                  CharSequence text, int start, int end, boolean first, Layout layout) {
        Paint.Style style = p.getStyle();
        int paintColor = p.getColor();

        p.setStyle(Paint.Style.FILL);
        p.setColor(stripeColor);

        c.drawRect(x, top, x + dir * stripeWidth, bottom, p);

        p.setStyle(style);
        p.setColor(paintColor);
    }

    @Override
    public void drawBackground(Canvas c, Paint p, int left, int right, int top, int baseline, int bottom, CharSequence text, int start, int end, int lnum) {
        int paintColor = p.getColor();
        p.setColor(backgroundColor);
        c.drawRect(left, top, right, bottom, p);
        p.setColor(paintColor);
    }
}

如何在Android TextViews中设置BlockQuotes的样式？

1 个答案: