Android学习札记47：TextView显示Html类解析的网页和图片及自定义标签

1、TextView 显示 Html 类解析的网页

CharSequence richText = Html.fromHtml("<strong>萝卜白菜的博客</strong>--<a href='http://orgcent.com'>http://orgcent.com</a>");

mTVText.setText(richText);
// 此行必须，否则超链接无法点击，ScrollingMovementMethod 实现滚动条
mTVText.setMovementMethod(LinkMovementMethod.getInstance());

PS：如果想同时让内容可滚动和超链接可点击，只要设置 LinkMovementMethod 即可，因为其继承了 ScrollingMovementMethod。

2、TextView 显示 Html 解析的图片和自定义标签

final String html = "萝卜白菜的博客<img src='http://m3.img.libdd.com/farm3/115/BBE681F0CAFB16C6806E6AEC1E82D673_64_64.jpg'/><mytag color='blue'>自定义

</mytag>";

// 处理未知标签，通常是系统默认不能处理的标签
final Html.TagHandler tagHandler = new Html.TagHandler() {

	int contentIndex = 0;

	/**
	 * opening : 是否为开始标签
	 * tag: 标签名称
	 * output:输出信息，用来保存处理后的信息
	 * xmlReader: 读取当前标签的信息，如属性等
	 */
	public void handleTag(boolean opening, String tag, Editable output, XMLReader xmlReader) {
		if ("mytag".equals(tag)) {
			if (opening) {	// 获取当前标签的内容开始位置
				contentIndex = output.length();

				try {
					final String color = (String) xmlReader.getProperty("color");
				} catch (Exception e) {
					e.printStackTrace();
				}
			} else {
				final int length = output.length();
				String content = output.subSequence(contentIndex, length).toString();
				SpannableString spanStr = new SpannableString(content);
				spanStr.setSpan(new ForegroundColorSpan(Color.GREEN), 0, content.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
				output.replace(contentIndex, length, spanStr);
			}
		}

		System.out.println("opening:" + opening + ",tag:" + tag + ",output:" + output);
	}};

	// 解析图片
	final Html.ImageGetter imageGetter = new Html.ImageGetter() {
		
		public Drawable getDrawable(String source) {
			// 在此必须异步加载图片
			Drawable d = null;

			try {
				InputStream is = new DefaultHttpClient().execute(new HttpGet(source)).getEntity().getContent();
				Bitmap bm = BitmapFactory.decodeStream(is);
				d = new BitmapDrawable(bm);
				// setBounds(0, 0, bm.getWidth(), bm.getHeight());
				d.setBounds(0, 0, 200, 300);
			} catch (Exception e) {
				e.printStackTrace();
			}

			return d;
		}
	};

｝

richText = Html.fromHtml(html, imageGetter, tagHandler);
mTVText.setText(richText);

转载自：

http://orgcent.com/android-textview-parse-html-image-tag/