This article shares the specific code for the RecyclerView to implement product classification function in Android for your reference. The specific content is as follows
Three RecyclerView implementations
//The layout on the left
<LinearLayout xmlns:andro android:layout_width="match_parent" android:layout_height="50dp" android:orientation="vertical"> <TextView android: android:textSize="18sp" android:text="Sold by Assad" android:gravity="center" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
//The layout on the right
<RelativeLayout xmlns:andro android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:/> <. android:layout_width="match_parent" android:layout_height="match_parent" android: android:layout_below="@+id/name"/> </RelativeLayout>
//Sub-Layout
<LinearLayout xmlns:andro android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <ImageView android: android:layout_width="90dp" android:layout_height="90dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android: /> </LinearLayout>
//Define an interface
public interface CallBack {
void onSuccess(List<> list);
void onFailer(String error);
}//The Model layer on the left
public class LeftModel {
private String path="/product/getCatagory";
public void getData(final CallBack callBack){
OkHttp okHttp=new OkHttp();
(path).getDataLiserner(new () {
@Override
public void Data(String s) {
Gson gson=new Gson();
LeftBean json = (s, );
List<> data = ();
if (data!=null){
(data);
}else {
("fail");
}
}
});
}
}//The Presenter layer on the left
public class LeftPresenter {
private LeftView leftView;
private final LeftModel leftModel;
public LeftPresenter(LeftView leftView) {
= leftView;
leftModel = new LeftModel();
}
public void showLeft(){
(new CallBack() {
@Override
public void onSuccess(List<> list) {
(list);
}
@Override
public void onFailer(String error) {
(error);
}
});
}
}//View layer
public interface LeftView {
void onSuccess(List<> list);
void Failer(String error);
}//The adapter on the left
public class LeftRecycAdapter extends <>{
private Context mContext;
private List<> list;
public LeftRecycAdapter(Context mContext, List<> list) {
= mContext;
= list;
}
@NonNull
@Override
public LeftViewHoler onCreateViewHolder(@NonNull ViewGroup viewGroup, int ViewType) {
View view = (mContext).inflate(.left_item, viewGroup,false);
LeftViewHoler leftViewHoler=new LeftViewHoler(view);
return leftViewHoler;
}
@Override
public void onBindViewHolder(@NonNull LeftViewHoler leftViewHoler, int position) {
((position).getName());
}
@Override
public int getItemCount() {
return ();
}
public class LeftViewHoler extends {
private TextView textView;
public LeftViewHoler(@NonNull View itemView) {
super(itemView);
textView=(.tv_name);
(new () {
@Override
public void onClick(View v) {
(v,getAdapterPosition());
}
});
}
}
public interface OnClickListener{
void onclick(View view,int position);
}
OnClickListener onClickListener;
public void setOnclickListener(OnClickListener onclickListener){
=onclickListener;
}
}Start the right one
//The interface on the right
public interface CallBackRight {
void onSuccess2(List<> list);
void onFailer2(String error);
}//The Model layer on the right
public class RightModel {
// private String path1="/product/getProductCatagory?cid=3&tdsourcetag=s_pcqq_aiomsg";
public void showright(final String cid2, final CallBackRight callBackRight){
OkHttp okHttp=new OkHttp();
(cid2).getDataLiserner(new () {
@Override
public void Data(String s) {
Gson gson=new Gson();
RightBean json = (s, );
List<> data = ();
if (data!=null){
callBackRight.onSuccess2(data);
}else {
callBackRight.onFailer2("mistake");
}
}
});
}
}//The Presenter layer on the right
public class RightPresenter {
private final RightModel rightModel;
private RightView rightView;
public RightPresenter(RightView rightView) {
= rightView;
rightModel = new RightModel();
}
public void showright(String id){
(id, new CallBackRight() {
@Override
public void onSuccess2(List<> list) {
rightView.onSuccess2(list);
}
@Override
public void onFailer2(String error) {
rightView.onFailer2(error);
}
});
}
}//The View layer on the right
public interface RightView {
void onSuccess2(List<> list);
void onFailer2(String error);
}//The adapter on the right
public class RightRecycAdapter extends <> {
private Context mContext;
private List<> list;
public RightRecycAdapter(Context mContext, List<> list) {
= mContext;
= list;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int ViewType) {
View view = (mContext).inflate(.right_item, viewGroup, false);
ViewHolder viewHolder=new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int position) {
((position).getName());
List<> list = (position).getList();
GridLayoutManager gridLayoutManager=new GridLayoutManager(mContext,3);
(gridLayoutManager);
ChildAdapter childAdapter=new ChildAdapter(mContext,list);
(childAdapter);
}
@Override
public int getItemCount() {
return ();
}
public class ViewHolder extends {
private TextView textView;
private RecyclerView recyclerView;
public ViewHolder(@NonNull View itemView) {
super(itemView);
textView=();
recyclerView=(.right_recy);
}
}
}//Subclass adapter
public class ChildAdapter extends <> {
private Context context;
private List<> list;
public ChildAdapter(Context context, List<> list) {
= context;
= list;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int ViewType) {
View view = (context).inflate(, viewGroup, false);
ViewHolder viewHolder=new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int position) {
((position).getName());
(context).load((position).getIcon()).into();
}
@Override
public int getItemCount() {
return ();
}
public class ViewHolder extends {
private ImageView imageView;
private TextView textView;
public ViewHolder(@NonNull View itemView) {
super(itemView);
imageView=(.image2);
textView=(.title1);
}
}
}//Get started
public class Fragment1 extends Fragment implements LeftView,RightView {
private View view;
private RecyclerView left;
private RecyclerView right;
private RightPresenter rightPresenter;
Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
(msg);
final List<> list = (List<>) ;
LinearLayoutManager linearLayoutManager=new LinearLayoutManager(getActivity(),,false);
(linearLayoutManager);
LeftRecycAdapter leftRecycAdapter=new LeftRecycAdapter(getActivity(),list);
(leftRecycAdapter);
(new () {
@Override
public void onclick(View view, int position) {
int cid = (position).getCid();
("/product/getProductCatagory?cid="+cid);
}
});
//List<> list1 = (List<>) ;
}
};
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
view = (.fragment_fragment1, container, false);
initView();
return view;
}
private void initView() {
LeftPresenter leftPresenter=new LeftPresenter(this);
();
left = (RecyclerView) (.left_recy);
right = (RecyclerView) (.right_recy);
rightPresenter = new RightPresenter(this);
}
@Override
public void onSuccess(List<> list) {
Message message = ();
=list;
(message);
}
@Override
public void Failer(String error) {
}
@Override
public void onSuccess2(final List<> list) {
/*Message message = ();
=list;
(message);*/
(new Runnable() {
@Override
public void run() {
LinearLayoutManager linear= new LinearLayoutManager(getActivity(),,false);
(linear);
RightRecycAdapter rightRecycAdapter=new RightRecycAdapter(getActivity(),list);
(rightRecycAdapter);
}
});
}
@Override
public void onFailer2(String error) {
}
}The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.