在Android中，ListView项状态未保存在Croll上

我有ListView，每个列表项的底部都有一个Like按钮。滚动时，我无法保存按钮的状态。当我向上或向下滚动时，按钮的状态被重置。我想我需要添加一个pojo类来获取和设置button的状态，但是我不知道怎么做，所以有人能帮我编写代码吗

我的适配器类：

public class FeedListAdapter extends BaseAdapter {
    private Activity activity;

    private int lastPosition = -1;
    private DatabaseHandler db;
    int id = 0;
    String email;
    private List<FeedItem> feedItems;
    ImageLoader imageLoader = AppController.getInstance().getImageLoader();

    public FeedListAdapter(Activity activity, List<FeedItem> feedItems) {
        this.activity = activity;
        this.feedItems = feedItems;
    }

    @Override
    public int getViewTypeCount() {

        if (getCount() != 0)
            return getCount();

        return 1;
    }
    @Override
    public int getCount() {
        return feedItems.size();
    }

    @Override
    public Object getItem(int location) {
        return feedItems.get(location);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, final ViewGroup parent) {

       final ViewHolder holder;
        final FeedItem item = feedItems.get(position);
        if (convertView == null){

            LayoutInflater inflater = (LayoutInflater) activity
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.feed_item, parent,false);
            holder = new ViewHolder();
            //Getting Views from Layout
            holder.likebutton =
                    (LikeButton) convertView.findViewById(R.id.star_button);
            holder.name = (TextView) convertView.findViewById(R.id.name);
            holder.timestamp = (TextView) convertView
                    .findViewById(R.id.timestamp);
            holder.statusMsg = (TextView) convertView
                    .findViewById(R.id.txtStatusMsg);
            holder.url = (TextView) convertView.findViewById(R.id.txtUrl);
            holder.like = (TextView) convertView.findViewById(R.id.like_box_no);
            holder.share = (TextView) convertView.findViewById(R.id.share_no);
            holder.comment = (TextView) convertView.findViewById(R.id.comment_no);
            holder.profilePic = (NetworkImageView) convertView
                    .findViewById(R.id.profilePic);
            holder.feedImageView = (FeedImageView) convertView
                    .findViewById(R.id.feedImage1);
            //End Getting Views from Layout

            convertView.setTag(holder);
        }

        else{

            holder = (ViewHolder)convertView.getTag();
        }

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

         //get User Email
        db = new DatabaseHandler(activity.getApplication());
        HashMap<String, String> user = db.getUserDetails();
        email = user.get("email").toString();
        // End get User Email ID for sending it to db


        holder.name.setText(item.getName());

        // Converting timestamp into x ago format
        CharSequence timeAgo = DateUtils.getRelativeTimeSpanString(
                Long.parseLong(item.getTimeStamp()),
                System.currentTimeMillis(), DateUtils.SECOND_IN_MILLIS);
        holder.timestamp.setText(timeAgo);
        if (item.getFav().equals("1")) {

                holder.likebutton.setLiked(true);


        } else {
            // status is empty, remove from view

            holder.likebutton.setLiked(false);
        }
        // Check for empty status message
        if (!TextUtils.isEmpty(item.getStatus())) {
            holder.statusMsg.setText(item.getStatus());
            holder.statusMsg.setVisibility(View.VISIBLE);
        } else {
            // status is empty, remove from view
            holder.statusMsg.setVisibility(View.GONE);
        }
        // Chcek for empty Like
        if (!TextUtils.isEmpty(item.getLike())) {
            holder.like.setText(item.getLike());
            holder.like.setVisibility(View.VISIBLE);
        } else {
            // status is empty, remove from view
            holder.like.setText("0");
        }
        // Chcek for empty Comment
        if (!TextUtils.isEmpty(item.getComment())) {
            holder.comment.setText(item.getComment());
            holder.comment.setVisibility(View.VISIBLE);
        } else {
            // status is empty, remove from view
            holder.comment.setText("0");
        }
        // Check for empty Share
        if (!TextUtils.isEmpty(item.getShare())) {
            holder.share.setText(item.getShare());
            holder.share.setVisibility(View.VISIBLE);
        } else {
            // status is empty, remove from view
            holder.share.setText("0");
        }


        // Checking for null feed url
        if (item.getUrl() != null) {
            holder.url.setText(Html.fromHtml("<a href=\"" + item.getUrl() + "\">"
                    + item.getUrl() + "</a> "));

            // Making url clickable
            holder.url.setMovementMethod(LinkMovementMethod.getInstance());
            holder.url.setVisibility(View.VISIBLE);
        } else {
            // url is null, remove from the view
            holder.url.setVisibility(View.GONE);
        }

        // user profile pic
        holder.profilePic.setImageUrl(item.getProfilePic(), imageLoader);
        //Setting preloading Image to profile pic
        imageLoader.get(item.getProfilePic(), ImageLoader.getImageListener(holder.profilePic, R.drawable._businessman, R.drawable._businessman));

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

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

        //Animating the List View
        Animation animation = AnimationUtils.loadAnimation(activity.getApplication(), (position > lastPosition) ? R.anim.up_from_bottom : R.anim.down_from_top);
        convertView.startAnimation(animation);
        lastPosition = position;
        //End Animating the List View

         //onClick Like Button



                //Toast.makeText(activity.getApplication(), "Fav Changed : " + item.getId(), Toast.LENGTH_SHORT).show();
                //if Favourite Clicked Do this
                holder.likebutton.setOnLikeListener(new OnLikeListener() {

                    @Override
                    public void liked(LikeButton likeButton) {

                        id = item.getId();
                        Log.d("inFavChngeListner", "Clickd" + item.getId());
                        new send_json().execute();
                        likeButton.setLiked(true);

                    }

                    @Override
                    public void unLiked(LikeButton likeButton) {
                        new send_json_unlike().execute();
                        likeButton.setLiked(false);

                    }
                });


        return convertView;


    }

     public static class ViewHolder {
         public LikeButton likebutton;
         public TextView name;
         public TextView timestamp;
         public TextView statusMsg;
         public TextView like;
         public TextView share;
         public TextView comment;
         public TextView url;
         public NetworkImageView profilePic;
         public FeedImageView feedImageView;

    }

    //Sending Likes with email id and feed id to Remote Mysql Db
    public class send_json extends AsyncTask<String, String, JSONObject> {
        @Override
        protected void onPreExecute() {
            super.onPreExecute();

        }

        @Override
        protected JSONObject doInBackground(String... params) {
            UserFunctions userFunction = new UserFunctions();

            JSONObject json = userFunction.like_func(email, String.valueOf(id));
            Log.d("BG Like, Email:" + email + "Id: " + String.valueOf(id), json.toString());

            return json;
        }

        @Override
        protected void onPostExecute(JSONObject jsonObject) {
            super.onPostExecute(jsonObject);

        }
    }
    //Sending UnLike Request with email id and feed id to Remote Mysql Db
    public class send_json_unlike extends AsyncTask<String, String, JSONObject> {
        @Override
        protected void onPreExecute() {
            super.onPreExecute();

        }

        @Override
        protected JSONObject doInBackground(String... params) {
            UserFunctions userFunction = new UserFunctions();

            JSONObject json = userFunction.unlike_func(email, String.valueOf(id));
            Log.d("BG UnLike, Email:" + email + "Id: " + String.valueOf(id), json.toString());
            return json;
        }



}
}

公共类FeedListAdapter扩展了BaseAdapter{
私人活动；
private int lastPosition=-1；
专用数据库处理程序数据库；
int id=0；
字符串电子邮件；
私人物品清单；
ImageLoader ImageLoader=AppController.getInstance（）.getImageLoader（）；
公共FeedListAdapter（活动，列出feedItems）{
这个。活动=活动；
此项。feedItems=feedItems；
}
@凌驾
public int getViewTypeCount（）{
如果（getCount（）！=0）
返回getCount（）；
返回1；
}
@凌驾
public int getCount（）{
返回feedItems.size（）；
}
@凌驾
公共对象getItem（int位置）{
返回feedItems.get（位置）；
}
@凌驾
公共长getItemId（int位置）{
返回位置；
}
@凌驾
公共视图getView（最终整型位置、视图转换视图、最终视图组父视图）{
最终持票人；
最终饲料项目=饲料项目。获取（位置）；
if（convertView==null）{
LayoutFlater充气机=（LayoutFlater）活动
.getSystemService（上下文布局\充气机\服务）；
convertView=充气机。充气（R.layout.feed_项，父项，false）；
holder=新的ViewHolder（）；
//从布局中获取视图
像纽扣一样的扣子=
（如按钮）convertView.findViewById（R.id.star_按钮）；
holder.name=（TextView）convertView.findViewById（R.id.name）；
holder.timestamp=（TextView）convertView
.findviewbyd（R.id.时间戳）；
holder.statusMsg=（TextView）convertView
.findViewById（R.id.txtStatusMsg）；
holder.url=（TextView）convertView.findViewById（R.id.txtrl）；
holder.like=（TextView）convertView.findViewById（R.id.like\u框号）；
holder.share=（TextView）convertView.findViewById（R.id.share\u no）；
holder.comment=（TextView）convertView.findViewById（R.id.comment\u no）；
holder.profilePic=（NetworkImageView）convertView
.findviewbyd（R.id.profilePic）；
holder.feedImageView=（feedImageView）convertView
.findViewById（R.id.feedImage1）；
//结束从布局中获取视图
convertView.setTag（支架）；
}
否则{
holder=（ViewHolder）convertView.getTag（）；
}
如果（imageLoader==null）
imageLoader=AppController.getInstance（）.getImageLoader（）；
//获取用户电子邮件
db=新的DatabaseHandler（activity.getApplication（））；
HashMap user=db.getUserDetails（）；
email=user.get（“email”）.toString（）；
//最终获取发送给db的用户电子邮件ID
holder.name.setText（item.getName（））；
//将时间戳转换为x ago格式
CharSequence timeAgo=DateUtils.getRelativeTimeSpanString(
Long.parseLong（item.getTimeStamp（）），
System.currentTimeMillis（），DateUtils.SECOND（单位：毫秒）；
holder.timestamp.setText（timeAgo）；
if（item.getFav（）等于（“1”））{
holder.likebutton.setLiked（true）；
}否则{
//状态为空，请从视图中删除
holder.likebutton.setLiked（false）；
}
//检查空状态消息
如果（！TextUtils.isEmpty（item.getStatus（）））{
holder.statusMsg.setText（item.getStatus（））；
holder.statusMsg.setVisibility（视图可见）；
}否则{
//状态为空，请从视图中删除
holder.statusMsg.setVisibility（View.GONE）；
}
//Chcek适用于空类
如果（！TextUtils.isEmpty（item.getLike（）））{
holder.like.setText（item.getLike（））；
holder.like.setVisibility（View.VISIBLE）；
}否则{
//状态为空，请从视图中删除
holder.like.setText（“0”）；
}
//用于空注释的Chcek
如果（！TextUtils.isEmpty（item.getComment（）））{
holder.comment.setText（item.getComment（））；
holder.comment.setVisibility（View.VISIBLE）；
}否则{
//状态为空，请从视图中删除
holder.comment.setText（“0”）；
}
//检查是否有空共享
如果（！TextUtils.isEmpty（item.getShare（）））{
holder.share.setText（item.getShare（））；
holder.share.setVisibility（View.VISIBLE）；
}否则{
//状态为空，请从视图中删除
持有人。股份。设定文本（“0”）；
}
//正在检查空提要url
if（item.getUrl（）！=null）{
holder.url.setText（Html.fromHtml（“”）；
//使url可点击
setMovementMethod（LinkMovementMethod.getInstance（））；
holder.url.setVisibility（View.VISIBLE）；
}否则{
//url为空，请从视图中删除
holder.url.setVisibility（View.GONE）；
}
//用户档案图片
holder.profilePic.setImageUrl（item.getProfilePic（），imageLoader）；
//将预加载图像设置为配置文件pic
imageLoader.get（item.getProfilePic（），imageLoader.getImageListener（holder.profilePic，R.drawable.\u businesser，R.drawable.\u businesser））；
//馈送图像
if（item.getImge（）！=null）{
holder.feedImageView.setImageUrl（item.getImge（），imageLoader）；
holder.feedImageView.setVisibility（View.VISIBLE）；
holder.feedImageView
    public class MainFragment extends Fragment implements  SwipeRefreshLayout.OnRefreshListener{

    private static final String TAG = MainFragment.class.getSimpleName();
    private ListView listView;
    private FeedListAdapter listAdapter;
    private List<FeedItem> feedItems;
    View  view;
    private CircleRefreshLayout mRefreshLayout;
    private boolean count=false;
    JSONObject feedObj;
    FeedItem item;

    public MainFragment() {
    }

    public static MainFragment newInstance(String text) {
        MainFragment fragment = new MainFragment();
        Bundle bundle = new Bundle();
        fragment.setArguments(bundle);
        return fragment;
    }


    @Override
    public void registerForContextMenu(View view) {
        super.registerForContextMenu(view);
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.activity_main, container, false);
        mRefreshLayout = (CircleRefreshLayout) view.findViewById(R.id.refresh_layout);
        listView = (ListView) view.findViewById(R.id.list);
        feedItems = new ArrayList<FeedItem>();
        listAdapter = new FeedListAdapter(getActivity(), feedItems);

        view.setFocusableInTouchMode(true);
        view.requestFocus();

//Listeneing to Back Button
        view.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_BACK) {
                        getActivity().finish();
                        Toast.makeText(getActivity(), "Back Pressed", Toast.LENGTH_SHORT).show();
                        return true;
                    }
                }
                return false;
            }
        });

        //Starting start Loader Animation Thread and fetching the feed
mRefreshLayout.post(new Runnable() {
    @Override
    public void run() {
        startAnim();
        count=true;
        fetch();
    }
});

        mRefreshLayout.setOnRefreshListener(
                new CircleRefreshLayout.OnCircleRefreshListener() {
                    @Override
                    public void refreshing() {
                        // do something when refresh starts
                        count = true;
                        fetch();


                    }

                    @Override
                    public void completeRefresh() {
                        // do something when refresh complete

                    }
                });
        listView.setAdapter(listAdapter);


        return view;

    }


    private void fetch()
     {

                 // making fresh volley request and getting json
            JsonObjectRequest jsonReq = new JsonObjectRequest(Request.Method.GET,
                    URL_FEED, null, new Response.Listener<JSONObject>() {

                @Override
                public void onResponse(JSONObject response) {
                    VolleyLog.d(TAG, "Response: " + response.toString());
                    if (response != null) {
                        feedItems.clear();
                        parseJsonFeed(response);

                    }
                    if (count){
                        stopAnim();
                        mRefreshLayout.finishRefreshing();
                        count=false;
                    }

                }
            }, new Response.ErrorListener() {

                @Override
                public void onErrorResponse(VolleyError error) {
                    VolleyLog.d(TAG, "Error: " + error.getMessage());


                }
            });

            // Adding request to volley request queue
            AppController.getInstance().addToRequestQueue(jsonReq);
        }


    /**
     * Parsing json reponse and passing the data to feed view list adapter
     * */
    private void parseJsonFeed(JSONObject response) {
        try {

            JSONArray feedArray = response.getJSONArray("feed");
            for (int i = 0; i < feedArray.length(); i++) {

                feedObj = (JSONObject) feedArray.get(i);
                item = new FeedItem();
                item.setId(feedObj.getInt("id"));
                item.setName(feedObj.getString("name"));

                // Image might be null sometimes
                String image = feedObj.isNull("image") ? null : feedObj
                        .getString("image");
                item.setImge(image);
                item.setStatus(feedObj.getString("status"));
                item.setProfilePic(feedObj.getString("profilePic"));
                item.setTimeStamp(feedObj.getString("timeStamp"));
                // url might be null sometimes
                String feedUrl = feedObj.isNull("url") ? null : feedObj
                        .getString("url");
                item.setUrl(feedUrl);
                item.setLike(feedObj.getString("like"));
                item.setComment(feedObj.getString("comment"));
                item.setShare(feedObj.getString("share"));
                item.setFav(feedObj.getString("fav"));
                feedItems.add(item);

            }



            // notify data changes to list adapater
            listAdapter.notifyDataSetChanged();
        } catch (JSONException e) {
            e.printStackTrace();
        }

    }


    @Override
    public void onRefresh() {

    }

    //start Animation on Start
    void startAnim(){

        view.findViewById(R.id.avloadingIndicatorView).setVisibility(View.VISIBLE);
    }

    //stop Animation on start
    void stopAnim(){
        view.findViewById(R.id.avloadingIndicatorView).setVisibility(View.GONE);
    }

}

holder.likebutton.setOnLikeListener(new OnLikeListener() {

                    @Override
                    public void liked(LikeButton likeButton) {

                        id = item.getId();
                        Log.d("inFavChngeListner", "Clickd" + item.getId());
                        new send_json().execute();
                        likeButton.setLiked(true);
                        item.setFav("1")

                    }

                    @Override
                    public void unLiked(LikeButton likeButton) {
                        new send_json_unlike().execute();
                        likeButton.setLiked(false);
                        item.setFav("0")
                    }
                });