我在listview中遇到问题。实际上我已经从Facebook Like Custom Feed实施了Facebook Like Feed 这是从MySQL数据库中获取数据。在每个列表项的底部，我有一个来自这个库的{Like}按钮Material Favourite Button。我的问题是，当我点击第一个列表项目时，第五个列表项目自动被喜欢，如果我点击第二个列表项目第四个列表项目被喜欢，依此类推。我尝试了我能做的一切，但没有解决这个问题。我试图将视图持有者添加到我的列表适配器类中，如此处的各种已回答的问题所示，但它没有解决我的问题。请帮忙！下面是我的适配器类：
public class FeedListAdapter extends BaseAdapter {
private Activity activity;
private int lastPosition = -1;
private DatabaseHandler db;
ViewHolder holder;
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 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) {
if (convertView == null){
LayoutInflater inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.feed_item, parent,false);
holder = new ViewHolder();
holder.materialFavoriteButtonNice =
(MaterialFavoriteButton) convertView.findViewById(R.id.like_anim);
convertView.setTag(holder);
}else{
holder = (ViewHolder)convertView.getTag();
}
if (imageLoader == null)
imageLoader = AppController.getInstance().getImageLoader();
TextView name = (TextView) convertView.findViewById(R.id.name);
TextView timestamp = (TextView) convertView
.findViewById(R.id.timestamp);
//get User Email
db = new DatabaseHandler(activity.getApplication());
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
//Getting Views from Layout
TextView statusMsg = (TextView) convertView
.findViewById(R.id.txtStatusMsg);
TextView url = (TextView) convertView.findViewById(R.id.txtUrl);
final TextView like = (TextView) convertView.findViewById(R.id.like_box_no);
TextView share = (TextView) convertView.findViewById(R.id.share_no);
TextView comment = (TextView) convertView.findViewById(R.id.comment_no);
NetworkImageView profilePic = (NetworkImageView) convertView
.findViewById(R.id.profilePic);
FeedImageView feedImageView = (FeedImageView) convertView
.findViewById(R.id.feedImage1);
//End Getting Views from Layout
final FeedItem item = feedItems.get(position);
name.setText(item.getName());
// Converting timestamp into x ago format
CharSequence timeAgo = DateUtils.getRelativeTimeSpanString(
Long.parseLong(item.getTimeStamp()),
System.currentTimeMillis(), DateUtils.SECOND_IN_MILLIS);
timestamp.setText(timeAgo);
// Check for empty status message
if (!TextUtils.isEmpty(item.getStatus())) {
statusMsg.setText(item.getStatus());
statusMsg.setVisibility(View.VISIBLE);
} else {
// status is empty, remove from view
statusMsg.setVisibility(View.GONE);
}
// Chcek for empty Like
if (!TextUtils.isEmpty(item.getLike())) {
like.setText(item.getLike());
like.setVisibility(View.VISIBLE);
} else {
// status is empty, remove from view
like.setText("0");
}
// Chcek for empty Comment
if (!TextUtils.isEmpty(item.getComment())) {
comment.setText(item.getComment());
comment.setVisibility(View.VISIBLE);
} else {
// status is empty, remove from view
comment.setText("0");
}
// Chcek for empty Share
if (!TextUtils.isEmpty(item.getShare())) {
share.setText(item.getShare());
share.setVisibility(View.VISIBLE);
} else {
// status is empty, remove from view
share.setText("0");
}
if (item.getFav().equals("1")) {
holder.materialFavoriteButtonNice.setFavorite(true, false);
holder.materialFavoriteButtonNice.setVisibility(View.VISIBLE);
} else {
// status is empty, remove from view
holder.materialFavoriteButtonNice.setFavorite(false, false);
}
// Checking for null feed url
if (item.getUrl() != null) {
url.setText(Html.fromHtml("<a href=\"" + item.getUrl() + "\">"
+ item.getUrl() + "</a> "));
// Making url clickable
url.setMovementMethod(LinkMovementMethod.getInstance());
url.setVisibility(View.VISIBLE);
} else {
// url is null, remove from the view
url.setVisibility(View.GONE);
}
// user profile pic
profilePic.setImageUrl(item.getProfilePic(), imageLoader);
imageLoader.get(item.getProfilePic(), ImageLoader.getImageListener(profilePic, R.drawable._businessman, R.drawable._businessman));
// 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);
}
//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
holder.materialFavoriteButtonNice.setOnFavoriteChangeListener(new MaterialFavoriteButton.OnFavoriteChangeListener() {
@Override
public void onFavoriteChanged(MaterialFavoriteButton buttonView, boolean favorite) {
id = item.getId();
Log.d("inFavChngeListner", "Clickd" + item.getId());
Toast.makeText(activity.getApplication(), "Fav Changed : " + item.getId(), Toast.LENGTH_SHORT).show();
if (favorite) {
new send_json().execute();
} else {
holder.materialFavoriteButtonNice.setFavorite(false, true);
new send_json_unlike().execute();
}
}
});
return convertView;
}
static class ViewHolder {
MaterialFavoriteButton materialFavoriteButtonNice;
}
//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();
if(!holder.materialFavoriteButtonNice.isFavorite())
holder.materialFavoriteButtonNice.setFavorite(true, true);
}
@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);
if(!holder.materialFavoriteButtonNice.isFavorite())
holder.materialFavoriteButtonNice.setFavorite(true, true);
}
}
//Sending Likes 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();
if(!holder.materialFavoriteButtonNice.isFavorite())
holder.materialFavoriteButtonNice.setFavorite(false, true);
}
@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;
}
@Override
protected void onPostExecute(JSONObject jsonObject) {
super.onPostExecute(jsonObject);
if(!holder.materialFavoriteButtonNice.isFavorite())
holder.materialFavoriteButtonNice.setFavorite(false, true);
}
}
}
答案 0 :(得分：0)
不要使用ViewHolder实例全局。使其在功能范围内。并尝试改变逻辑。只更新数组中的模型，只需调用notifyDataSetChanged（）方法。我认为这将解决您的问题。