当列表视图向下滚动时，TextView会丢失文本更改

Question

我尝试在文字视图上实施“显示更多”和“显示更少”功能，应该在点击“显示更多”或“显示更少文字”时展开和折叠。

问题在于，如果我在单击“显示更多”和“放大”时展开文本视图向下滚动列表，它再次崩溃。

感谢。

private void bindPostContent(ViewHolder holder, Cursor c) {
    //Main text in HTML format
    String postContent = c.getString(thoughtC);
    holder.tvPostHtml.setVisibility(View.VISIBLE);
    holder.tvPostHtml.setText(Html.fromHtml(c.getString(thoughtC)));
    Linkify.addLinks(holder.tvPostHtml, Linkify.WEB_URLS);
    if (!TextUtils.isEmpty(postContent)) {
        if (postContent.length() > 240) {
            resizePostContent(holder.tvPostHtml, "...Show More", true);
        }
    } else {
        holder.tvPostHtml.setVisibility(View.GONE);
    }
    //Display attachments
    AttachmentContainer container = new AttachmentContainer(tid, holder.llAttachmentContainer,
            ThoughtContainerType.THOUGHT,
            context, c.getString(attachmentC),
            attachJsonMapper, pollState);
    value = container.value;
    container.renderAttachmentViews();
}

public void resizePostContent(final TextView tvPostContent, final String showMoreLessLabel, final boolean showMore) {

    if (tvPostContent.getTag() == null) {
        tvPostContent.setTag(tvPostContent.getText());
    }
    ViewTreeObserver vto = tvPostContent.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

        @SuppressWarnings("deprecation")
        @Override
        public void onGlobalLayout() {

            ViewTreeObserver obs = tvPostContent.getViewTreeObserver();
            obs.removeGlobalOnLayoutListener(this);
            if (showMore) {
                String text = tvPostContent.getText().subSequence(0, 240) + " " + showMoreLessLabel;
                tvPostContent.setText(text);
                tvPostContent.setMovementMethod(LinkMovementMethod.getInstance());
                tvPostContent.setText(showMoreLess(Html.fromHtml(tvPostContent.getText().toString()), tvPostContent, showMoreLessLabel, showMore));
            } else {
                String text = tvPostContent.getText().subSequence(0, tvPostContent.getText().length()) + " " + showMoreLessLabel;
                tvPostContent.setText(text);
                tvPostContent.setMovementMethod(LinkMovementMethod.getInstance());
                tvPostContent.setText(showMoreLess(Html.fromHtml(tvPostContent.getText().toString()), tvPostContent, showMoreLessLabel, showMore));
            } tvPostContent.setOnClickListener(clickListener);
        }
    });

}

private  SpannableStringBuilder showMoreLess(final Spanned postContentSpanned, final TextView tvPostContent, final String showMoreLessLabel, final boolean viewMore) {
    String str = postContentSpanned.toString();
    SpannableStringBuilder ssb = new SpannableStringBuilder(postContentSpanned);
    if (str.contains(showMoreLessLabel)) {
        ssb.setSpan(new ClickableSpan() {

            @Override
            public void onClick(View widget) {
                tvPostContent.setOnClickListener(null);
                if (viewMore) {
                    tvPostContent.setLayoutParams(tvPostContent.getLayoutParams());
                    tvPostContent.setText(tvPostContent.getTag().toString());
                    resizePostContent(tvPostContent, "Show Less", false);
                } else {
                    tvPostContent.setLayoutParams(tvPostContent.getLayoutParams());
                    tvPostContent.setText(tvPostContent.getTag().toString());
                    resizePostContent(tvPostContent, "...Show More", true);
                }

            }
            @Override public void updateDrawState(TextPaint ds){
                ds.setUnderlineText(false);
                ds.setColor(context.getResources().getColor(R.color.newsfeed_item_action_performed));
            }
        }, str.indexOf(showMoreLessLabel), str.indexOf(showMoreLessLabel) + showMoreLessLabel.length(), 0);

    }
    return ssb;
}