如何在RealmRecyclerViewAdapter中实现可过滤 [英] how to implement filterable in RealmRecyclerViewAdapter
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问题描述
可过滤不起作用。这是代码： 私人类AirportAdapter扩展RealmRecyclerViewAdapter< AirportR，RecyclerView.ViewHolder>实现可过滤
{
上下文上下文;
OrderedRealmCollection< AirportR> listAirports;
公共AirportAdapter（上下文活动，OrderedRealmCollection< AirportR>机场）
{
super（activity，airports，true）;
this.context = activity;
this.listAirports = airports;
$ b @Override
public RecyclerView.ViewHolder onCreateViewHolder（ViewGroup parent，int viewType）
{
View view = LayoutInflater.from（parent.getContext （））。inflate（R.layout.airport_show，parent，false）;
AirportClass持有人=新AirportClass（查看）;
回报持有人;
$ b @Override
public void onBindViewHolder（RecyclerView.ViewHolder持有者，int位置）
{
AirportR airportR = listAirports.get （位置）;
AirportClass mHolder =（AirportClass）持有者;
mHolder.country.setText（airportR.getIsoCountry（））;
mHolder.name.setText（airportR.getName（））;
}
public Filter getFilter（）
{
AirportFilter filter = new AirportFilter（this，listAirports）;
返回过滤器;
}
私人课程AirportFilter延伸过滤器
{
私人最终AirportAdapter适配器;
OrderedRealmCollection< AirportR> originalList;
OrderedRealmCollection< AirportR> filteredList; （AirportAdapter adapter，OrderedRealmCollection< AirportR> originalList）
{
super（）;
private AirportFilter
this.adapter = adapter;
this.originalList = originalList;
@Override
保护FilterResults performFiltering（CharSequence约束）
{
filteredList.clear（）;
final FilterResults results = new FilterResults（）;
if（constraint.length（）== 0）
{
filteredList.addAll（originalList）;
}
else
{
final String filterPattern = constraint.toString（）。toLowerCase（）。trim（）; （最终AirportR机场R：原始列表）
如果（airportR.getName（）。toLowerCase（）。contains（filterPattern））
{
filteredList.add（airportR）;
}
}
}
results.values = filteredList;
results.count = filteredList.size（）;
返回结果;
$ b @Override
protected void publishResults（CharSequence constraint，FilterResults results）
{
adapter.listAirports.addAll（（OrderedRealmCollection< AirportR>） results.values）;
adapter.notifyDataSetChanged（）;
$ b private class AirportClass extends RecyclerView.ViewHolder
{
TextView name，country;
ImageView图像;
public AirportClass（View itemView）
{
super（itemView）;
name =（TextView）itemView.findViewById（R.id.name）;
country =（TextView）itemView.findViewById（R.id.country）;
image =（ImageView）itemView.findViewById（R.id.imageView）;
$ b 和I返回错误：
java.lang.UnsupportedOperationException：此方法不受RealmResults支持。
at io.realm.RealmResults.addAll（RealmResults.java:710）
at com.example.matteo.downloadairports.fragment.ListAirportFragment $ AirportAdapter $ AirportFilter.publishResults
在过滤并更新适配器后，如何保存结果？
谢谢
解决方案将过滤移到 publishResults 并使用UI线程Realm的查询来评估新的结果。
private class AirportAdapter
扩展RealmRecyclerViewAdapter< AirportR，RecyclerView.ViewHolder>
实现可过滤{
领域;
public AirportAdapter（Context context，Realm realm，OrderedRealmCollection< AirportR> airports）{
super（context，airports，true）;
this.realm = realm;
$ b @Override
public RecyclerView.ViewHolder onCreateViewHolder（ViewGroup parent，int viewType）{
View view = LayoutInflater.from（parent.getContext（））。 inflate（R.layout.airport_show，parent，false）;
AirportClass持有人=新AirportClass（查看）;
回报持有人;
$ b @Override
public void onBindViewHolder（RecyclerView.ViewHolder holder，int position）{
AirportR airportR = getData（）。get（position）;
AirportClass mHolder =（AirportClass）持有者;
mHolder.country.setText（airportR.getIsoCountry（））;
mHolder.name.setText（airportR.getName（））;
}
public void filterResults（String text）{
text = text == null？ null：text.toLowerCase（）。trim（）;
if（text == null ||.equals（text））{
updateData（realm.where（AirportR.class）.findAll（））;
} else {
updateData（realm.where（AirportR.class）
.contains（fieldToQueryBy，text，Case.INSENSITIVE）// TODO：change field
.findAll （））;
$ b $ public FilterFilter（）{
AirportFilter filter = new AirportFilter（this）;
返回过滤器;
}
私人类AirportFilter
扩展过滤器{
私人最终AirportAdapter适配器;
私人AirportFilter（AirportAdapter适配器）{
super（）;
this.adapter = adapter;
$ b @Override
protected FilterResults performFiltering（CharSequence constraint）{
return new FilterResults（）;
$ b @Override
protected void publishResults（CharSequence constraint，FilterResults results）{
adapter.filterResults（constraint.toString（））;
私人类AirportClass
扩展RecyclerView.ViewHolder {
TextView name，country;
ImageView图像;
public AirportClass（View itemView）{
super（itemView）;
name =（TextView）itemView.findViewById（R.id.name）;
country =（TextView）itemView.findViewById（R.id.country）;
image =（ImageView）itemView.findViewById（R.id.imageView）;
}
}
}
I'm using well RealmRecyclerViewAdapter. My problem is to implement a Filterable that not works. This is the code:
private class AirportAdapter extends RealmRecyclerViewAdapter<AirportR,RecyclerView.ViewHolder> implements Filterable
{
Context context;
OrderedRealmCollection<AirportR>listAirports;
public AirportAdapter(Context activity, OrderedRealmCollection<AirportR>airports)
{
super(activity,airports, true);
this.context = activity;
this.listAirports = airports;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
{
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.airport_show, parent,false);
AirportClass holder = new AirportClass(view);
return holder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position)
{
AirportR airportR = listAirports.get(position);
AirportClass mHolder = (AirportClass)holder;
mHolder.country.setText(airportR.getIsoCountry());
mHolder.name.setText(airportR.getName());
}
public Filter getFilter()
{
AirportFilter filter = new AirportFilter(this, listAirports);
return filter;
}
private class AirportFilter extends Filter
{
private final AirportAdapter adapter;
OrderedRealmCollection<AirportR>originalList;
OrderedRealmCollection<AirportR>filteredList;
private AirportFilter(AirportAdapter adapter, OrderedRealmCollection<AirportR> originalList)
{
super();
this.adapter = adapter;
this.originalList = originalList;
}
@Override
protected FilterResults performFiltering(CharSequence constraint)
{
filteredList.clear();
final FilterResults results = new FilterResults();
if (constraint.length() == 0)
{
filteredList.addAll(originalList);
}
else
{
final String filterPattern = constraint.toString().toLowerCase().trim();
for (final AirportR airportR : originalList)
{
if (airportR.getName().toLowerCase().contains(filterPattern))
{
filteredList.add(airportR);
}
}
}
results.values = filteredList;
results.count = filteredList.size();
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results)
{
adapter.listAirports.addAll((OrderedRealmCollection<AirportR>) results.values);
adapter.notifyDataSetChanged();
}
}
private class AirportClass extends RecyclerView.ViewHolder
{
TextView name, country;
ImageView image;
public AirportClass(View itemView)
{
super(itemView);
name = (TextView)itemView.findViewById(R.id.name);
country = (TextView)itemView.findViewById(R.id.country);
image = (ImageView)itemView.findViewById(R.id.imageView);
}
}
}
and I give back the error:
java.lang.UnsupportedOperationException: This method is not supported by RealmResults.
at io.realm.RealmResults.addAll(RealmResults.java:710)
at com.example.matteo.downloadairports.fragment.ListAirportFragment$AirportAdapter$AirportFilter.publishResults
how could I save the result after I filter it and update the adapter?
Thanks
解决方案 Move the filtering to publishResults and use the UI thread Realm's queries to evaluate the new results.
private class AirportAdapter
extends RealmRecyclerViewAdapter<AirportR, RecyclerView.ViewHolder>
implements Filterable {
Realm realm;
public AirportAdapter(Context context, Realm realm, OrderedRealmCollection<AirportR> airports) {
super(context, airports, true);
this.realm = realm;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.airport_show, parent, false);
AirportClass holder = new AirportClass(view);
return holder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
AirportR airportR = getData().get(position);
AirportClass mHolder = (AirportClass) holder;
mHolder.country.setText(airportR.getIsoCountry());
mHolder.name.setText(airportR.getName());
}
public void filterResults(String text) {
text = text == null ? null : text.toLowerCase().trim();
if(text == null || "".equals(text)) {
updateData(realm.where(AirportR.class).findAll());
} else {
updateData(realm.where(AirportR.class)
.contains("fieldToQueryBy", text, Case.INSENSITIVE) // TODO: change field
.findAll());
}
}
public Filter getFilter() {
AirportFilter filter = new AirportFilter(this);
return filter;
}
private class AirportFilter
extends Filter {
private final AirportAdapter adapter;
private AirportFilter(AirportAdapter adapter) {
super();
this.adapter = adapter;
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
return new FilterResults();
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
adapter.filterResults(constraint.toString());
}
}
private class AirportClass
extends RecyclerView.ViewHolder {
TextView name, country;
ImageView image;
public AirportClass(View itemView) {
super(itemView);
name = (TextView) itemView.findViewById(R.id.name);
country = (TextView) itemView.findViewById(R.id.country);
image = (ImageView) itemView.findViewById(R.id.imageView);
}
}
}
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