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Set Text View ellipsize and add view more at end

并添加了更多视图，并在listview项目中查看更少。但问题从滚动开始，查看更多有时消失，所有文本视图自动展开。如何解决此问题，请帮助。

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if (inflater == null) inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    if (convertView == null)
        convertView = inflater.inflate(R.layout.feed_item, null);

    if (imageLoader == null)
        imageLoader = AppController.getInstance().getImageLoader();

    TextView name = (TextView) convertView.findViewById(R.id.name);
    TextView timestamp = (TextView) convertView.findViewById(R.id.timestamp);
    TextView statusMsg = (TextView) convertView.findViewById(R.id.txtStatusMsg);
    TextView url = (TextView) convertView.findViewById(R.id.txtUrl);
    NetworkImageView profilePic = (NetworkImageView) convertView.findViewById(R.id.profilePic);
    FeedImageView feedImageView = (FeedImageView) convertView.findViewById(R.id.feedImage1);
    FeedItem item = feedItems.get(position);
    name.setText(item.getName());
    CharSequence timeAgo = DateUtils.getRelativeTimeSpanString(Long.parseLong(item.getTimeStamp()), System.currentTimeMillis(), DateUtils.SECOND_IN_MILLIS);
    timestamp.setText(timeAgo);
    if (!TextUtils.isEmpty(item.getStatus())) {
       ////This is TextView I want to expand
        statusMsg.setText(item.getStatus());
        statusMsg.setVisibility(View.VISIBLE);
        makeTextViewResizable(statusMsg, 3, "...More", true);
    } else {
        statusMsg.setVisibility(View.GONE);
    }

    if (item.getUrl() != null) {
        url.setText(Html.fromHtml("<a href=\"" + item.getUrl() + "\">"
                + item.getUrl() + "</a> "));
        url.setMovementMethod(LinkMovementMethod.getInstance());
        url.setVisibility(View.VISIBLE);
    } else {
        url.setVisibility(View.GONE);
    }

    // user profile pic
    profilePic.setImageUrl(item.getProfilePic(), imageLoader);

    // Feed image
    if (item.getImge() != null) {
        feedImageView.setImageUrl(item.getImge(), imageLoader);
        feedImageView.setVisibility(View.VISIBLE);
        feedImageView
                .setResponseObserver(new FeedImageView.ResponseObserver() {
                    @Override
                    public void onError() {
                    }

                    @Override
                    public void onSuccess() {
                    }
                });
    } else {
        feedImageView.setVisibility(View.GONE);
    }

    return convertView;
}

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);
                tv.setTextColor(Color.BLACK);
            } 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);
                tv.setTextColor(Color.BLACK);
            } 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);
                tv.setTextColor(Color.BLACK);
            }
        }
    });
}

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 MySpannable(false) {

            @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, "...Less", false);
                } else {
                    tv.setLayoutParams(tv.getLayoutParams());
                    tv.setText(tv.getTag().toString(), TextView.BufferType.SPANNABLE);
                    tv.invalidate();
                    makeTextViewResizable(tv, 3, "...More", true);
                }
            }
        }, str.indexOf(spanableText), str.indexOf(spanableText) + spanableText.length(), 0);
    }
    return ssb;
}

Answer 1

如果文本长度大于150，则下面的解决方案将添加“查看更多”选项，并将文本椭圆化为150个字符。单击“查看更多”，它将显示包含“显示更少”选项的完整文本，再次单击“显示更少”将会显示椭圆形文本为150个字符。它与recyclerview项目的textview一起使用，也适用于listview。

if(inputText.length()>150)
        {
            String text=inputText.substring(0,150)+"...";
            final String fulltext=inputText;

            final SpannableString ss = new SpannableString(text+"View More");

            ClickableSpan span1 = new ClickableSpan() {
                @Override
                public void onClick(View textView) {
                    // do some thing
                    SpannableString ss1 = new SpannableString(fulltext+"Show Less");
                    ClickableSpan span2 = new ClickableSpan() {
                        @Override
                        public void onClick(View textView) {
                            // do some thing
                            textView.setText(ss);
                            textView.setMovementMethod(LinkMovementMethod.getInstance());

                        }
                    };
                    ss1.setSpan(span2, fulltext.length(), ss1.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
                    ss1.setSpan(new ForegroundColorSpan(Color.BLUE), fulltext.length(), ss1.length(),
                            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);


                    textView.setText(ss1);
                    textView.setMovementMethod(LinkMovementMethod.getInstance());
                }
            };
            ss.setSpan(span1, 153, 162, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            ss.setSpan(new ForegroundColorSpan(Color.BLUE), 153,162,
                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

            textView.setText(ss);
            textView.setMovementMethod(LinkMovementMethod.getInstance());
        }
else
        {
            textView.setText(inputText);
        }

在Listview内的textview中继续像facebook一样阅读

1 个答案: