使用EditText过滤ListView

基本上我正在尝试使用EditText过滤ListView。 我设法存储所有过滤的结果，但似乎我缺少一些东西，因为UI没有更新，并且它没有显示任何文本更改。 有什么迹象吗？ 谢谢

import android.app.Activity; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Filter; import android.widget.Filterable; import android.widget.ImageView; import android.widget.TextView; import com.enloop.R; import java.util.ArrayList; public class FriendsWithMeAdapter extends BaseAdapter implements Filterable { private Context mContext; private ArrayList friend; private ArrayList items = new ArrayList(); private ArrayList suggestions = new ArrayList(); public FriendsWithMeAdapter(Context c, ArrayList ai) { mContext = c; friend = ai; } @Override public int getCount() { return friend.size(); } @Override public Object getItem(int position) { return friend.get(position); } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService(Activity.LAYOUT_INFLATER_SERVICE); convertView = mInflater.inflate(R.layout.item_friend, null); } ImageView userImage = (ImageView) convertView.findViewById(R.id.invited_friend_picture); ImageView checkImage = (ImageView) convertView.findViewById(R.id.invite_friends_check); TextView name = (TextView) convertView.findViewById(R.id.invited_friend_name); TextView userName = (TextView) convertView.findViewById(R.id.invited_friend_name); userImage.setImageBitmap(friend.get(position).getUserImage()); checkImage.setImageResource(friend.get(position).isWithMe() ? R.drawable.btn_checkmark_round_tiny : R.drawable.btn_before_checkmark_round_tiny); String userEnloopNameString = friend.get(position).getName(); name.setText(userNameString); String userNameString = friend.get(position).getUserName(); if (userNameString.length() > 12) { userNameString = userNameString.substring(0, 10); userNameString += ".."; } userName.setText(userNameString); return convertView; } @Override public Filter getFilter() { Filter filter = new Filter() { @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults results = new FilterResults(); if (constraint == null && constraint.length() == 0) { results.values = friend; results.count = friend.size(); } else { for (FriendsModel item : friend) { if (item.getName().toLowerCase().contains(constraint.toString().toLowerCase())) suggestions.add(item); } results.values = suggestions; results.count = suggestions.size(); } return results; } @Override protected void publishResults(CharSequence constraint, FilterResults results) { if (results.count == 0) { notifyDataSetInvalidated(); } else { items = (ArrayList) results.values; } } }; return filter; } } mSearch.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { adapter.getFilter().filter(s.toString()); } @Override public void afterTextChanged(Editable s) { } }); 

Answer 1

试试这种方式，希望这可以帮助您解决问题。

 mSearch.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { } @Override public void afterTextChanged(Editable s) { adapter.filter(text); } }); 

这里使用两个列表一个用于原始数据，另一个用于过滤数据请记住你不能使用（=）分配过滤数据如果你这样做那么过滤数据也会改变原始数据，过滤数据用于显示列表列表item，所以你必须使用addAll（）而不是（=）赋值，它不会改变原始数据，每当你使用自定义适配器时尝试使用ViewHolder模式。

 public class FriendsWithMeAdapter extends BaseAdapter implements Filterable { private Context mContext; private ArrayList friend; private ArrayList suggestions = new ArrayList(); public FriendsWithMeAdapter(Context mContext, ArrayList friend) { this.mContext = mContext; this.friend = friend; suggestions =new ArrayList(); suggestions.addAll(friend); } @Override public int getCount() { return suggestions.size(); } @Override public Object getItem(int position) { return suggestions.get(position); } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { holder = new ViewHolder(); convertView = LayoutInflater.from(mContext).inflate(R.layout.item_friend, null); holder.userImage = (ImageView) convertView.findViewById(R.id.invited_friend_picture); holder.checkImage = (ImageView) convertView.findViewById(R.id.invite_friends_check); holder.name = (TextView) convertView.findViewById(R.id.invited_friend_name); holder.userName = (TextView) convertView.findViewById(R.id.invited_friend_name); convertView.setTag(holder); }else{ holder = (ViewHolder) convertView.getTag(); } holder.userImage.setImageBitmap(suggestions.get(position).getUserImage()); holder.checkImage.setImageResource(suggestions.get(position).isWithMe() ? R.drawable.btn_checkmark_round_tiny : R.drawable.btn_before_checkmark_round_tiny); String userEnloopNameString = suggestions.get(position).getName(); holder.name.setText(userNameString); String userNameString = suggestions.get(position).getUserName(); if (userNameString.length() > 12) { userNameString = userNameString.substring(0, 10); userNameString += ".."; } holder.userName.setText(userNameString); return convertView; } public void filter(String charText) { suggestions.clear(); if (charText.length() == 0) { suggestions.addAll(friend); }else{ for (FriendsModel item : friend) { if (item.getName().toLowerCase().contains(constraint.toString().toLowerCase())) suggestions.add(item); } } notifyDataSetChanged(); } public class ViewHolder { ImageView userImage; ImageView checkImage; TextView name; TextView userName; } }