我的自定义过滤器出了问题。我做到了，它运作良好。当我调试代码时，它很好地过滤了数组，但我在void publishResults（）中遇到了问题。我不知道什么是问题，有人帮忙吗？
public class KatalogAdapter extends ArrayAdapter<Katalog> implements Filterable {
List<Katalog> object;
int num = 0;
public KatalogAdapter(@NonNull Context context, @LayoutRes int resource, @NonNull List<Katalog> objects) {
super(context, resource, objects);
object = objects;
}
public void setObject(List<Katalog> kat){
this.object = kat;
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
View v = convertView;
if(v==null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.katalozi_item, null);
}
Katalog katalog = object.get(position);
ImageView katalogImage = (ImageView) v.findViewById(R.id.katalogImage);
TextView katalogProizvodjac = (TextView) v.findViewById(R.id.katalogProizvodjac);
TextView katalogVaziDo = (TextView) v.findViewById(R.id.katalogVaziDo);
TextView idKataloga = (TextView) v.findViewById(R.id.idKataloga);
String src = katalog.getImageSRC();
Picasso.with(getContext()).load(src).into(katalogImage);
/*Glide.with(getContext()).load(src).thumbnail(Glide.with(getContext()).load(R.drawable.loading_icon))
.fitCenter()
.crossFade().into(katalogImage); */
// katalogImage.setImageBitmap(bitmap);
katalogProizvodjac.setText(katalog.getKatalogProizvodjac());
String doe = katalog.getKatalogVaziDo();
char lastChar = doe.charAt(doe.length() - 1);
if(lastChar=='1'){
katalogVaziDo.setText("Važi još "+ doe +" dan");
}
if(doe.equals("0")){
katalogVaziDo.setText("Važi još danas");
}
if(lastChar!='1' && !doe.equals("0")){
katalogVaziDo.setText("Važi još "+katalog.getKatalogVaziDo() + " dana");
}
// katalogVaziDo.setText("Važi do: "+katalog.getKatalogVaziDo());
idKataloga.setText(String.valueOf(katalog.getIdKataloga()));
return v;
}
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
ArrayList<Katalog> tempList=new ArrayList<Katalog>();
//constraint is the result from text you want to filter against.
//objects is your data set you will filter from
if(constraint != null && object!=null) {
int length=object.size();
int i=0;
while(i<length){
Katalog item=object.get(i);
if(item.getKatalogProizvodjac().toLowerCase(Locale.getDefault()).contains(constraint.toString().toLowerCase())){
tempList.add(item);
}
i++;
}
//following two lines is very important
//as publish result can only take FilterResults objects
filterResults.values = tempList;
filterResults.count = tempList.size();
}
return filterResults;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
// object = (ArrayList<Katalog>) results.values;
setObject((List<Katalog>) results.values);
num = results.count;
notifyDataSetChanged();
}
};
}
}
我正在寻找答案，我发现在该函数中我需要将数据放入数组中。我做到了，但仍然没有用。
答案 0 :(得分：1)
我提供带有过滤器的recyler视图适配器以获取联系人详细信息，您可以根据需要更改所需的代码。
public class InviteContactAdapter extends RecyclerView.Adapter<InviteContactAdapter.ItemViewHolder> implements Filterable {
private List<UserContact> mContactList = new ArrayList<>();
private List<UserContact> mContectFilter = new ArrayList<>();
private Context mContext;
private CustomFilter mFilter;
public List<String> mEmailList = new ArrayList<>();
public InviteContactAdapter(Context context, List<UserContact> mContactList) {
mContext = context;
this.mContactList = mContactList;
this.mContectFilter = mContactList;
mFilter = new CustomFilter();
}
public onItemClickListener onItemClickListener;
public void setOnItemClickListener(InviteContactAdapter.onItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
@Override
public ItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.invite_contact_row_layout, viewGroup, false);
return new ItemViewHolder(view);
}
public interface onItemClickListener {
void onClick(UserContact contact);
}
@Override
public Filter getFilter() {
return mFilter;
}
@Override
public void onBindViewHolder(final ItemViewHolder itemViewHolder, int i) {
final UserContact contact = mContectFilter.get(i);
itemViewHolder.mTvUserNane.setText(contact.getUserName().trim());
itemViewHolder.mTvUserEmail.setText(contact.getUserEmail().trim());
if (contact.isSelect())
itemViewHolder.mIvSelect.setImageResource(R.drawable.check_contect);
else
itemViewHolder.mIvSelect.setImageResource(R.drawable.un_check_contact);
itemViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (contact.isSelect()) {
contact.setSelect(false);
itemViewHolder.mIvSelect.setImageResource(R.drawable.un_check_contact);
} else {
contact.setSelect(true);
itemViewHolder.mIvSelect.setImageResource(R.drawable.check_contect);
}
}
});
}
@Override
public int getItemCount() {
return mContectFilter.size();
}
public class ItemViewHolder extends RecyclerView.ViewHolder {
private TextView mTvUserNane, mTvUserEmail;
private ImageView mIvSelect;
public ItemViewHolder(View itemView) {
super(itemView);
mTvUserEmail = itemView.findViewById(R.id.icrlTvUserEmail);
mTvUserNane = itemView.findViewById(R.id.icrlTvUserName);
mIvSelect = itemView.findViewById(R.id.icrlIvSelect);
}
}
public List<String> getEmail() {
mEmailList.clear();
for (UserContact contact : mContectFilter) {
if (contact.isSelect()) {
mEmailList.add(contact.getUserEmail());
}
}
return mEmailList;
}
/**
* this class for filter data.
*/
class CustomFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
FilterResults results = new FilterResults();
if (charSequence != null && charSequence.length() > 0) {
ArrayList<UserContact> filters = new ArrayList<>();
charSequence = charSequence.toString().toUpperCase();
for (int i = 0; i < mContactList.size(); i++) {
if (mContactList.get(i).getUserName().toUpperCase().contains(charSequence) || mContactList.get(i).getUserEmail().toUpperCase().contains(charSequence)) {
UserContact contact = new UserContact();
contact.setUserName(mContactList.get(i).getUserName());
contact.setUserEmail(mContactList.get(i).getUserEmail());
filters.add(contact);
}
}
results.count = filters.size();
results.values = filters;
} else {
results.count = mContactList.size();
results.values = mContactList;
}
return results;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
mContectFilter = (ArrayList<UserContact>) filterResults.values;
notifyDataSetChanged();
}
}
}
并调用以下过滤器记录的edittext框中的活动。 过滤数据 注意：确保您的适配器对象不为空
/**
* this method filter data.
*/
private void sortData(View root) {
mEtSearchData = (EditText) root.findViewById(R.id.icffEtSearch);
mEtSearchData.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) {
if (inviteContactAdapter != null) {
inviteContactAdapter.getFilter().filter(s);
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
答案 1 :(得分：0)
我的问题是在某些行中我讨厌gridView.setAdapter（null）。 但是，我还有一个问题，在gridView我有5个元素，过滤后，我有一个项目填充了真实数据和4个空项目。所以，我改变了getView函数.. 如果有人需要它，这里是：
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
View v = convertView;
if(v==null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.katalozi_item, null);
}
if(objectfilt.size()>position){
Katalog katalog = objectfilt.get(position);
ImageView katalogImage = (ImageView) v.findViewById(R.id.katalogImage);
TextView katalogProizvodjac = (TextView) v.findViewById(R.id.katalogProizvodjac);
TextView katalogVaziDo = (TextView) v.findViewById(R.id.katalogVaziDo);
TextView idKataloga = (TextView) v.findViewById(R.id.idKataloga);
String src = katalog.getImageSRC();
Picasso.with(getContext()).load(src).into(katalogImage);
/*Glide.with(getContext()).load(src).thumbnail(Glide.with(getContext()).load(R.drawable.loading_icon))
.fitCenter()
.crossFade().into(katalogImage); */
// katalogImage.setImageBitmap(bitmap);
katalogProizvodjac.setText(katalog.getKatalogProizvodjac());
String doe = katalog.getKatalogVaziDo();
char lastChar = doe.charAt(doe.length() - 1);
if(lastChar=='1'){
katalogVaziDo.setText("Važi još "+ doe +" dan");
}
if(doe.equals("0")){
katalogVaziDo.setText("Važi još danas");
}
if(lastChar!='1' && !doe.equals("0")){
katalogVaziDo.setText("Važi još "+katalog.getKatalogVaziDo() + " dana");
}
// katalogVaziDo.setText("Važi do: "+katalog.getKatalogVaziDo());
idKataloga.setText(String.valueOf(katalog.getIdKataloga()));
return v;
}
else {
v.setVisibility(View.GONE);
return v;
}
因此，添加了ListArray objectfilt中的元素，当int position变得大于ListView元素的数量时，只需隐藏该视图。