@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
String rich = Constants.RICH_TEXTS[position];
// 通过迭代装饰方式构造解析器。
IParser parser = new SmileyParser(mContext);
parser = new ImageParser(mContext, parser);
parser = new HyperlinkParser(mContext, parser);
parser = new WeburlParser(mContext, parser);
// 执行解析并返回解析文本段队列。
ParseManager manager = new ParseManager();
ArrayList<ParsedSegment> segments = manager.parse(parser, rich);
// 用 Holder 模式更新列表数据。
CustomLayout layout = null;
ViewHolder holder = null;
if (null == convertView) {
layout = new CustomLayout(mContext);
AbsListView.LayoutParams params =
new AbsListView.LayoutParams(
AbsListView.LayoutParams.MATCH_PARENT, AbsListView.LayoutParams.WRAP_CONTENT);
layout.setLayoutParams(params);
layout.setOrientation(LinearLayout.VERTICAL);
layout.setBackgroundResource(R.drawable.list_item_background);
holder = new ViewHolder();
holder.views = new ArrayList<View>();
layout.setTag(holder);
} else {
layout = (CustomLayout) convertView;
holder = (ViewHolder) convertView.getTag();
}
int i = 0;
for (ParsedSegment segment : segments) {
if (TextUtils.isEmpty(segment.text)) {
continue;
}
if (MatchType.None == segment.type) {
TextView textView = null;
if (null == convertView) {
textView = new TextView(mContext);
LayoutParams p = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
p.bottomMargin =
mContext.getResources().getDimensionPixelSize(R.dimen.rich_element_margin);
textView.setLayoutParams(p);
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
// 自定义 ClickableSpan 点击背景，有两种方法：
// 1、自定义 LinkMovementMethod，重写其 onTouchEvent 方法；
// 2、重写 TextView 的 OnTouchListener。
// 两种方法的核心思想都是获取 touch event 事件，通过对 TextView 中的 ClickableSpan
// 文本设置和移除 BackgroundColorSpan 来改变其点击背景。
if (Constants.USE_CUSTOM_LINK) {
textView.setMovementMethod(mLinkMovementMethod);
} else {
textView.setMovementMethod(LinkMovementMethod.getInstance());
textView.setOnTouchListener(onTouchListener);
}
textView.setClickable(false);
layout.addView(textView);
holder.views.add(textView);
} else {
textView = (TextView) holder.views.get(i);
}
textView.setText(segment.text);
++i;
} else if (MatchType.Image == segment.type) {
ImageView imgView = null;
if (null == convertView) {
imgView = new ImageView(mContext);
LayoutParams p = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
p.bottomMargin =
mContext.getResources().getDimensionPixelSize(R.dimen.rich_element_margin);
imgView.setMaxHeight(
mContext.getResources().getDimensionPixelSize(R.dimen.image_max_height));
imgView.setLayoutParams(p);
layout.addView(imgView);
holder.views.add(imgView);
} else {
imgView = (ImageView) holder.views.get(i);
}
// 异步加载图片。
mImageLoader.displayImage(
segment.text.toString(), imgView, mOptions, mAnimateFirstListener);
++i;
}
}
return layout;
}
