我正在尝试将可扩展的TextView放在ListView项目中，这是第一次显示正常，但是当我滚动时，Spannable文本被删除。请帮我解决这个问题。
这是适配器代码
ViewHolder viewHolder;
if (convertView == null) {
viewHolder = new ViewHolder();
convertView = mLayoutInflater.inflate(R.layout.row_drilldown_detail, null);
viewHolder.rl_drill_down = (RelativeLayout) convertView.findViewById(R.id.rl_drill_down);
viewHolder.ctvGroupTitle = (TextView) convertView.findViewById(R.id.ctv_group_title);
viewHolder.ctv_interval_count = (TextView) convertView.findViewById(R.id.ctv_interval_count);
viewHolder.ctv_interval_description = (TextView) convertView.findViewById(R.id.ctv_interval_description);
viewHolder.ctv_coach_name = (TextView) convertView.findViewById(R.id.ctv_coach_name);
viewHolder.ratingBar = (RatingBar) convertView.findViewById(R.id.rating_bar_group);
convertView.setTag(viewHolder);
}
viewHolder = (ViewHolder) convertView.getTag();
if(!model.getDescription().isEmpty()) {
viewHolder.ctv_interval_description.setVisibility(View.VISIBLE);
viewHolder.ctv_interval_description.setText("Description: " + model.getDescription());
AppUtils.makeTextViewResizable(viewHolder.ctv_interval_description, 3, "View More", true);
viewHolder.ctv_interval_description.setFocusable(false);
viewHolder.ctv_interval_description.setFocusableInTouchMode(false);
} else
viewHolder.ctv_interval_description.setVisibility(View.GONE);
这是Spannable Text Code
public static void makeTextViewResizable(final TextView tv, final int maxLine,
final String expandText, final boolean viewMore) {
if (tv.getTag() == null) {
tv.setTag(tv.getText());
}
ViewTreeObserver vto = tv.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@SuppressWarnings("deprecation")
@Override
public void onGlobalLayout() {
ViewTreeObserver obs = tv.getViewTreeObserver();
obs.removeGlobalOnLayoutListener(this);
if (maxLine == 0) {
int lineEndIndex = tv.getLayout().getLineEnd(0);
String text = tv.getText().subSequence(0, lineEndIndex - expandText.length() + 1) + " " + expandText;
tv.setText(text);
tv.setMovementMethod(LinkMovementMethod.getInstance());
tv.setText(
addClickablePartTextViewResizable(Html.fromHtml(tv.getText().toString()), tv, maxLine, expandText,
viewMore), TextView.BufferType.SPANNABLE);
} else if (maxLine > 0 && tv.getLineCount() >= maxLine) {
int lineEndIndex = tv.getLayout().getLineEnd(maxLine - 1);
String text = tv.getText().subSequence(0, lineEndIndex - expandText.length() + 1) + " " + expandText;
tv.setText(text);
tv.setMovementMethod(LinkMovementMethod.getInstance());
tv.setText(
addClickablePartTextViewResizable(Html.fromHtml(tv.getText().toString()), tv, maxLine, expandText,
viewMore), TextView.BufferType.SPANNABLE);
} else {
int lineEndIndex = tv.getLayout().getLineEnd(tv.getLayout().getLineCount() - 1);
String text = tv.getText().subSequence(0, lineEndIndex) + " " + expandText;
tv.setText(text);
tv.setMovementMethod(LinkMovementMethod.getInstance());
tv.setText(
addClickablePartTextViewResizable(Html.fromHtml(tv.getText().toString()), tv, lineEndIndex, expandText,
viewMore), TextView.BufferType.SPANNABLE);
}
}
});
}
private static SpannableStringBuilder addClickablePartTextViewResizable(final Spanned strSpanned, final TextView tv,
final int maxLine, final String spanableText, final boolean viewMore) {
String str = strSpanned.toString();
SpannableStringBuilder ssb = new SpannableStringBuilder(strSpanned);
if (str.contains(spanableText)) {
ssb.setSpan(new ClickableSpan() {
@Override
public void onClick(View widget) {
if (viewMore) {
tv.setLayoutParams(tv.getLayoutParams());
tv.setText(tv.getTag().toString(), TextView.BufferType.SPANNABLE);
tv.invalidate();
makeTextViewResizable(tv, -1, "View Less", false);
} else {
tv.setLayoutParams(tv.getLayoutParams());
tv.setText(tv.getTag().toString(), TextView.BufferType.SPANNABLE);
tv.invalidate();
makeTextViewResizable(tv, 3, "View More", true);
}
}
}, str.indexOf(spanableText), str.indexOf(spanableText) + spanableText.length(), 0);
}
return ssb;
}