从编辑文本过滤列表视图

searchBarTextView.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
    friendListAdapter.getFilter().filter(s);
}}

            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                Log.d(TAG, \"performFiltering\");

                constraint = constraint.toString().toLowerCase();
                Log.d(TAG, \"constraint : \"+constraint);

                List<ChatObject> filteredFriendList = new LinkedList<ChatObject>();

                for(int i=0; i<friendList.size(); i++) {
                    Friend newFriend = friendList.get(i);
                    Log.d(TAG, \"displayName : \"+newFriend.getDisplayName().toLowerCase());
                    if(newFriend.getDisplayName().toLowerCase().contains(constraint)) {
                        Log.d(TAG, \"equals : \"+newFriend.getDisplayName());
                        filteredFriendList.add(newFriend);
                    }
                }

                FilterResults newFilterResults = new FilterResults();
                newFilterResults.count = filteredFriendList.size();
                newFilterResults.values = filteredFriendList;
                return newFilterResults;
            }
        };
    }
    Log.d(TAG, \"end getFilter\");
    return newFilter;
}