I have a JSON nested object and i have been trying to pass for example, stations "name" to next activity in the onClick method. 2 questions:
1) Have i set my model class right or is there a better way?
2) What steps am i missing to pass "name" from stations from the specific object clicked onto the next activity?
My error for code provided (
java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object java.util.List.get(int)' on a null object reference
at com.example.ogure.trolleyproject.Adapter.StationsAdapter$ViewHolder.onClick(StationsAdapter.java:52)
Here is my JSON nested object
{
id: 1,
name: "Bus 1",
code: "TROL1",
tag_uid: "2HF4780H240827H40F284",
last_spotted_at: "2015-09-25 01:20:30",
last_spotted_station: 1,
stations: [
{
id: 1,
name: "Hennings Hall Station", //WHAT i want to pass
lat: "40.000000",
long: "41.000000",
_pivot_bus_id: 1,
_pivot_station_id: 1
}
}
Here is my model class
public class Bus implements Serializable {
#SerializedName("id")
private int mStationId;
#SerializedName("name")
private String mStationName;
#SerializedName("code")
private String mStationCode;
#SerializedName("tag_uid")
private String mStationTag_uid;
#SerializedName("last_spotted_at")
private String mStationLast_spot_time;
#SerializedName("last_spotted_station")
private int mStationLast_spot_station;
#SerializedName("stations")
private List<stations> stationInfo;
public int getmStationId() {
return mStationId;
}
public void setmStationId(int mStationId) {
this.mStationId = mStationId;
}
public List<stations> getStationInfo() {
return stationInfo;
}
public void setStationInfo(List<stations> stationInfo) {
this.stationInfo = stationInfo;
}
public int getmStationLast_spot_station() {
return mStationLast_spot_station;
}
public void setmStationLast_spot_station(int mStationLast_spot_station) {
this.mStationLast_spot_station = mStationLast_spot_station;
}
public String getmStationLast_spot_time() {
return mStationLast_spot_time;
}
public void setmStationLast_spot_time(String mStationLast_spot_time) {
this.mStationLast_spot_time = mStationLast_spot_time;
}
public String getmStationTag_uid() {
return mStationTag_uid;
}
public void setmStationTag_uid(String mStationTag_uid) {
this.mStationTag_uid = mStationTag_uid;
}
public String getmStationCode() {
return mStationCode;
}
public void setmStationCode(String mStationCode) {
this.mStationCode = mStationCode;
}
public String getmStationName() {
return mStationName;
}
public void setmStationName(String mStationName) {
this.mStationName = mStationName;
}
public class stations {
#SerializedName("id")
private int stationID;
#SerializedName("name")
private String stationName;
#SerializedName("lat")
private double stationLat;
#SerializedName("long")
private double stationLong;
#SerializedName("_pivot_bus_id")
private int mStationPiviotBusId;
#SerializedName("_pivot_station_id")
private int mStationPiviotStationId;
public int getmStationPiviotStationId() {
return mStationPiviotStationId;
}
public void setmStationPiviotStationId(int mStationPiviotStationId) {
this.mStationPiviotStationId = mStationPiviotStationId;
}
public int getmStationPiviotBusId() {
return mStationPiviotBusId;
}
public void setmStationPiviotBusId(int mStationPiviotBusId) {
this.mStationPiviotBusId = mStationPiviotBusId;
}
public double getStationLong() {
return stationLong;
}
public void setStationLong(double stationLong) {
this.stationLong = stationLong;
}
public double getStationLat() {
return stationLat;
}
public void setStationLat(double stationLat) {
this.stationLat = stationLat;
}
public String getStationName() {
return stationName;
}
public void setStationName(String stationName) {
this.stationName = stationName;
}
public int getStationID() {
return stationID;
}
public void setStationID(int stationID) {
this.stationID = stationID;
}
}
}
Here is my adapter class
public class StationsAdapter extends RecyclerView.Adapter<StationsAdapter.ViewHolder> {
private static List<Bus> mStations;
private static List<Bus.stations> mBusStations;
public StationsAdapter(List<Bus> stations) {
mStations = stations;
}
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView TvStationName;
public ImageView IvImageView;
public CardView mCardView;
public ViewHolder(View itemView) {
super(itemView);
TvStationName = (TextView) itemView.findViewById(R.id.station_name);
IvImageView = (ImageView) itemView.findViewById(R.id.station_photo);
mCardView = (CardView) itemView.findViewById(R.id.cv);
mCardView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
int position = getAdapterPosition();
Bus s = mStations.get(position);
Bus.stations og = mBusStations.get(position); //HERE
Intent i = new Intent(v.getContext(), StationActivity.class);
i.putExtra("station_name", og.getStationName()); //and HERE is my problem
v.getContext().startActivity(i);
}
}
#Override
public StationsAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.rv_card_item, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
#Override
public void onBindViewHolder(StationsAdapter.ViewHolder holder, int position) {
Bus stationPos = mStations.get(position);
holder.TvStationName.setText(stationPos.getmStationName());
holder.mCardView.setTag(position);
}
#Override
public int getItemCount() {
return mStations.size();
}
Change your code to following:
public StationsAdapter(List<Bus> stations) {
List<Bus.stations> busStations = new ArrayList<>();
for (Bus bus : stations) {
busStations.addAll(bus.getStationInfo());
}
}
Issue is that you don't assign nothing to your mBusStations variable, that's why NPE throws.
Btw, don't use that confusing naming. Im talking about stationInfo in your Bus class.
Related
I have added data in firebase. All i have to do is get that data in recyclerview. i have done this many type, but this time it is not showing and i don't know the reason because it is not showing in log. Can any one help?
here's my Activity where the RV is located
rvsalonlist is recyclerview
public void firebasedata() {
FirebaseRecyclerOptions<salonList> options =
new FirebaseRecyclerOptions.Builder<salonList>()
.setQuery(FirebaseDatabase.getInstance().getReference().child("salon"), salonList.class)
.build();
adapter = new SalonListAdapter(options);
rvSalonList.setAdapter(adapter);
adapter.startListening();
}
This is the adapter
public class SalonListAdapter extends FirebaseRecyclerAdapter<salonList,SalonListAdapter.myviewholder> {
public SalonListAdapter(#NonNull FirebaseRecyclerOptions<salonList> options) {
super(options);
}
#Override
protected void onBindViewHolder(#NonNull myviewholder holder, int position, #NonNull salonList model) {
holder.tvSalonName.setText(String.valueOf(model.getSalonName()));
holder.tvSalonAddress.setText(String.valueOf(model.getSalonAddresss()));
Glide.with(holder.ivSalonImage.getContext()).load(model.getImageUrl()).into(holder.ivSalonImage);
}
#NonNull
#Override
public myviewholder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_salon,parent,false);
return new myviewholder(view);
}
class myviewholder extends RecyclerView.ViewHolder{
ImageView ivSalonImage;
TextView tvSalonName, tvSalonMobileNumber, tvSalonAddress;
public myviewholder(#NonNull View itemView) {
super(itemView);
ivSalonImage = itemView.findViewById(R.id.ivSalonImage);
tvSalonName = itemView.findViewById(R.id.tvSalonName);
tvSalonMobileNumber = itemView.findViewById(R.id.tvSalonMobileNumber);
tvSalonAddress = itemView.findViewById(R.id.tvSalonAddress);
}
}
}
Heres the model class .
[![public class salonList {
private String imageUrl, salonName, ownerName, salonEmail, salonMobileNumber, salonAddresss, salonOpenTime, salonCloseTime;
public salonList() {
}
public salonList(String imageUrl, String salonName, String ownerName, String salonEmail, String salonMobileNumber, String salonAddresss, String salonOpenTime, String salonCloseTime) {
this.imageUrl = imageUrl;
this.salonName = salonName;
this.ownerName = ownerName;
this.salonEmail = salonEmail;
this.salonMobileNumber = salonMobileNumber;
this.salonAddresss = salonAddresss;
this.salonOpenTime = salonOpenTime;
this.salonCloseTime = salonCloseTime;
}
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
public String getSalonName() {
return salonName;
}
public void setSalonName(String salonName) {
this.salonName = salonName;
}
public String getOwnerName() {
return ownerName;
}
public void setOwnerName(String ownerName) {
this.ownerName = ownerName;
}
public String getSalonEmail() {
return salonEmail;
}
public void setSalonEmail(String salonEmail) {
this.salonEmail = salonEmail;
}
public String getSalonMobileNumber() {
return salonMobileNumber;
}
public void setSalonMobileNumber(String salonMobileNumber) {
this.salonMobileNumber = salonMobileNumber;
}
public String getSalonAddresss() {
return salonAddresss;
}
public void setSalonAddresss(String salonAddresss) {
this.salonAddresss = salonAddresss;
}
public String getSalonOpenTime() {
return salonOpenTime;
}
public void setSalonOpenTime(String salonOpenTime) {
this.salonOpenTime = salonOpenTime;
}
public String getSalonCloseTime() {
return salonCloseTime;
}
public void setSalonCloseTime(String salonCloseTime) {
this.salonCloseTime = salonCloseTime;
}
}
Database Screenshot
your model class variable names and firebase attributes name are not same. use same name in both places.
for example in firebase use salonName instead of name. similarly for other attributes as well
The names have to be identical
For eg, you have ownerName in the class but ownername in the database. Those should all be identical to the ones you have in your class.
I am using Android Paging with Room Database.I am going to fetch data using retrofit.But I am getting error No adapter attached; skipping layout.I searched a lot but dont find solution for this. Base url is working, for security reason i just hide base url.
private StoreAdapter storeAdapter;
private Store_ViewModel store_viewModel;
private RecyclerView recyclerView;
private static final String URL_DATA="https://xxxx/";
//insertion
private Store_Repository store_repository;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
store_repository=new Store_Repository(getApplication());
//adapter
storeAdapter=new StoreAdapter(getApplicationContext(), this);
//recycler
recyclerView=findViewById(R.id.recycler_store);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(true);
store_viewModel=new ViewModelProvider(this).get(Store_ViewModel.class);
store_viewModel.pagedListLiveData.observe(this, new Observer<PagedList<StoreModel>>() {
#Override
public void onChanged(PagedList<StoreModel> storeModels) {
storeAdapter.submitList(storeModels);
recyclerView.setAdapter(storeAdapter);
}
});
getAllProducts();
}
private void getAllProducts() {
Retrofit retrofit=new Retrofit.Builder()
.baseUrl(URL_DATA)
.addConverterFactory(GsonConverterFactory.create())
.build();
//calling api
Api api=retrofit.create(Api.class);
Call<List<StoreModel>>call=api.getAllProducts();
call.enqueue(new Callback<List<StoreModel>>() {
#Override
public void onResponse(Call<List<StoreModel>> call, Response<List<StoreModel>> response) {
if (response.isSuccessful())
{
store_repository.insert(response.body());
}
}
#Override
public void onFailure(Call<List<StoreModel>> call, Throwable t) {
Toast.makeText(MainActivity.this, "Something get Wrong", Toast.LENGTH_SHORT).show();
}
});
}
This is my ViewModel Class
public class Store_ViewModel extends AndroidViewModel {
public LiveData<PagedList<StoreModel>>pagedListLiveData;
private StoreDao storeDao;
public Store_ViewModel(#NonNull Application application) {
super(application);
storeDao= StoreDatabase.getINSTANCE(application).storeDao();
pagedListLiveData=new LivePagedListBuilder<>(
storeDao.getAllItems(),5
).build();
}
}
And this is my adapter class
public class StoreAdapter extends PagedListAdapter<StoreModel,StoreAdapter.StoreViewHolder> {
private Context context;
private static Listener listener;
public StoreAdapter(Context context,Listener listener)
{
super(storeModelItemCallback);
this.context=context;
this.listener=listener;
}
#NonNull
#Override
public StoreViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
return null;
}
#Override
public void onBindViewHolder(#NonNull StoreViewHolder holder, int position) {
StoreModel storeModel=getItem(position);
holder.Product_name.setText(storeModel.getProduct_name());
holder.Product_weight.setText(storeModel.getProduct_weight());
holder.Price.setText(storeModel.getPrice());
holder.Mrp.setText(storeModel.getMrp());
}
static class StoreViewHolder extends RecyclerView.ViewHolder
{
TextView Product_name;
TextView Product_weight;
TextView Price;
TextView Mrp;
public StoreViewHolder(#NonNull View itemView) {
super(itemView);
Product_name=itemView.findViewById(R.id.product_name);
Product_weight=itemView.findViewById(R.id.product_weight);
Price=itemView.findViewById(R.id.price);
Mrp=itemView.findViewById(R.id.mrp);
//listener
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
listener.onItemCLickListener(getAdapterPosition());
}
});
}
}
static DiffUtil.ItemCallback<StoreModel> storeModelItemCallback=new DiffUtil.ItemCallback<StoreModel>() {
#Override
public boolean areItemsTheSame(#NonNull StoreModel oldItem, #NonNull StoreModel newItem) {
return oldItem.getDatabase_id()==newItem.getDatabase_id();
}
#SuppressLint("DiffUtilEquals")
#Override
public boolean areContentsTheSame(#NonNull StoreModel oldItem, #NonNull StoreModel newItem) {
return oldItem.equals(newItem);
}
};
Json Response from Server
{"status":1,"msg":"",
"paginate":{"limit":1000,"PageNo":1},
"data":
[
{
"product_id":23234,
"product_brand_id":130,
"product_name":"Xyz"
,"product_code":"1554729666482",
"mrp":5,
"price":4,
"product_weight":1,
"product_weight_unit":"PCS"
}
,{"product_id":23244,
"product_brand_id":130,
"product_name":"Abc - 100 Gms",
"product_code":"9A","mrp":38,"price":31.94,
"product_weight":100,"product_weight_unit":"GM"}
ApiInterface
public interface Api {
#GET("/get-products")
Call<List<StoreModel>>getAllProducts();
}
Below is my StoreModel in which i am using room database fro creating tables
#Entity(tableName = "store",indices = #Index(value="product_id",unique = true))
public class StoreModel {
#PrimaryKey(autoGenerate = true)
private int database_id;
#SerializedName("product_id")
private int product_id;
#SerializedName("product_brand_id")
private int product_brand_id;
#SerializedName("product_name")
private String product_name;
#SerializedName("product_code")
private int product_code;
#SerializedName("mrp")
private int mrp;
#SerializedName("price")
private int price;
#SerializedName("product_weight")
private int product_weight;
#SerializedName("product_weight_unit")
private String product_weight_unit;
public StoreModel() {
}
public StoreModel(int product_id, int product_brand_id, String product_name, int product_code, int mrp, int price, int product_weight, String product_weight_unit) {
this.product_id = product_id;
this.product_brand_id = product_brand_id;
this.product_name = product_name;
this.product_code = product_code;
this.mrp = mrp;
this.price = price;
this.product_weight = product_weight;
this.product_weight_unit = product_weight_unit;
}
public int getProduct_id() {
return product_id;
}
public void setProduct_id(int product_id) {
this.product_id = product_id;
}
public int getProduct_brand_id() {
return product_brand_id;
}
public void setProduct_brand_id(int product_brand_id) {
this.product_brand_id = product_brand_id;
}
public String getProduct_name() {
return product_name;
}
public void setProduct_name(String product_name) {
this.product_name = product_name;
}
public int getProduct_code() {
return product_code;
}
public void setProduct_code(int product_code) {
this.product_code = product_code;
}
public int getMrp() {
return mrp;
}
public void setMrp(int mrp) {
this.mrp = mrp;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public int getProduct_weight() {
return product_weight;
}
public void setProduct_weight(int product_weight) {
this.product_weight = product_weight;
}
public String getProduct_weight_unit() {
return product_weight_unit;
}
public void setProduct_weight_unit(String product_weight_unit) {
this.product_weight_unit = product_weight_unit;
}
public int getDatabase_id() {
return database_id;
}
public void setDatabase_id(int database_id) {
this.database_id = database_id;
}
}
Below is Dao class
#Dao
public interface StoreDao {
#Insert(onConflict = OnConflictStrategy.REPLACE)
void insert(List<StoreModel> storeModels);
#Query("DELETE FROM store")
void deleteAll();
#Query("SELECT * FROM store ORDER BY database_id ASC")
DataSource.Factory<Integer,StoreModel>getAllItems();
}
Set recyclerView.setAdapter(storeAdapter); outside of observer because each time data is observed it will set adapter. So, adapter is attached to recyclerView only once. Like
recyclerView.setAdapter(storeAdapter);
store_viewModel.pagedListLiveData.observe(this, new Observer<PagedList<StoreModel>>() {
#Override
public void onChanged(PagedList<StoreModel> storeModels) {
storeAdapter.submitList(storeModels);
//recyclerView.setAdapter(storeAdapter);
}
});
From the API you are not getting exactly the StoreModel as response. You are getting another object which is StoreModel is a child object. You have to create resposne object like below:
public class ResponseObject{
//#SerializedName("status")
//private int status;
#SerializedName("data")
private List<StoreModel> storeModelList;
//getters and setters goes here
}
And then your interface should be like below as you are expecting
ResponseObject here
public interface Api {
#GET("/get-products")
Call<ResponseObject> getAllProducts();
}
I'm trying to inflate json data onto my List Item and I'm getting a blank Screen. The data I'm trying to show is from a nested json array. So I have created to Objects using retrofit and gson. I have made 2 objects (Cake and Ingredients) and the ingredients is a of List<> type.I have also provided an image of the json file.
public class CakesItem {
#SerializedName("id")
private int mId;
#SerializedName("name")
private String mName;
#SerializedName("ingredients")
private List<Ingredient> mIngredients;
public int getmId() {
return mId;
}
public String getmName() {
return mName;
}
public List<Ingredient> getmIngredients() {
return mIngredients;
}
}
public class Ingredient implements Parcelable {
private double quantity;
private String measure, ingredient;
public String getmMeasure() {
return measure;
}
public double getmQuantity() {
return quantity;
}
public String getmIngredient() {
return ingredient;
}
}
public class IngredientsAdapter extends RecyclerView.Adapter<IngredientsAdapter.IngredientsHolder> {
private List<Ingredient> ingredients = new ArrayList<>();
#NonNull
#Override
public IngredientsHolder onCreateViewHolder(#NonNull ViewGroup parent, int i) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.ingredient_list_item, parent, false);
return new IngredientsHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final IngredientsHolder Holder, int position) {
Holder.onBind(ingredients.get(position));
}
#Override
public int getItemCount() {
return ingredients.size();
}
void getIngredientsData(List<Ingredient> ingredients) {
this.ingredients.clear();
this.ingredients = ingredients;
notifyDataSetChanged();
}
class IngredientsHolder extends RecyclerView.ViewHolder {
private final TextView mIngredientsTV;
IngredientsHolder(#NonNull View itemView) {
super(itemView);
mIngredientsTV = itemView.findViewById(R.id.ingredients_list_tv);
}
void onBind(Ingredient ingredients) {
mIngredientsTV.setText(formatString(ingredients.getmIngredient(), String.valueOf(ingredients.getmQuantity()), ingredients.getmMeasure()));
}
private String formatString(String i, String q, String m) {
return " (" + q + " " + m + ") " + i;
}
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recipe_detail);
mIngredientsList = new ArrayList<>();
IngredientsAdapter ingredientsAdapter = new IngredientsAdapter();
ingredientsRecyclerView = findViewById(R.id.ingredients_recycler_view);
ingredientsRecyclerView.setHasFixedSize(true);
ingredientsRecyclerView.setLayoutManager(new LinearLayoutManager(this));
ingredientsRecyclerView.setAdapter(ingredientsAdapter);
ingredientsAdapter.getIngredientsData(mIngredientsList);
mRecipeImage = findViewById(R.id.recipe_cake_image_iv);
Drawable myDrawable = getResources().getDrawable(R.drawable.nutella_pie_2);
mRecipeImage.setImageDrawable(myDrawable);
mCakeTitle = findViewById(R.id.cake_title);
mCakeTitle.setText("Nutella Pie");
}
Where do you parse the JSON to object? From the code you just set an empty list to your adapter.
Try:
In MainActivity:
#Override
public void onItemClicked(CakesItem cakesItem) {
Intent detailIntent = new Intent(this, recipe_detail.class);
detailIntent.putExtra("Ingredients", cakesItem.getmIngredients());
startActivity(detailIntent);
}
In recipe_detail:
private List<Ingredient> mIngredientsList = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
...
mIngredientsList = getIntent().getSerializableExtra("Ingredients");;
IngredientsAdapter ingredientsAdapter = new IngredientsAdapter();
ingredientsAdapter.getIngredientsData(mIngredientsList);
...
}
Hi Im trying to show a list from retrofit onResponse and I am using recyclerview inside a fragment. The list shoud show chefs but I got an error from RecyclerView
Conexion Class
public class Conexion {
public static String BASE_URL = "http://10.30.0.133:8091/Service1.asmx/";
private static Retrofit retrofit = null;
public static Retrofit getClient() {
if (retrofit==null) {
retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
}
EndPoint Interface
public interface EndPointsInterface {
#GET("chef/{idUser}")
Call<ChefResponse> GetChefsCercanos(#Path("idUser") Integer id_usuario);
}
Entity Usuario
public class Usuario {
#SerializedName("id_usuario")
private Integer id_usuario;
#SerializedName("NombreUsuario")
private String NombreUsuario;
#SerializedName("ApellidoUsuario")
private String ApellidoUsuario;
#SerializedName("TelefonoUsuario")
private String TelefonoUsuario;
#SerializedName("Email")
private String Email;
#SerializedName("Contraseña")
private String Contraseña;
#SerializedName("pos_x")
private Double pos_x;
#SerializedName("pos_y")
private Double pos_y;
public Usuario(){}
public Usuario(Integer id_usuario,String NombreUsuario,String ApellidoUsuario,String TelefonoUsuario,String Email,String Contraseña,Double pos_x,Double pos_y){
this.id_usuario=id_usuario;
this.NombreUsuario=NombreUsuario;
this.ApellidoUsuario=ApellidoUsuario;
this.TelefonoUsuario=TelefonoUsuario;
this.Contraseña=Contraseña;
this.pos_x=pos_x;
this.pos_y=pos_y;
}
public Integer getId_usuario() {
return id_usuario;
}
public void setId_usuario(Integer id_usuario) {
this.id_usuario = id_usuario;
}
public String getNombreUsuario() {
return NombreUsuario;
}
public void setNombreUsuario(String nombreUsuario) {
NombreUsuario = nombreUsuario;
}
public String getApellidoUsuario() {
return ApellidoUsuario;
}
public void setApellidoUsuario(String apellidoUsuario) {
ApellidoUsuario = apellidoUsuario;
}
public String getTelefonoUsuario() {
return TelefonoUsuario;
}
public void setTelefonoUsuario(String telefonoUsuario) {
TelefonoUsuario = telefonoUsuario;
}
public String getEmail() {
return Email;
}
public void setEmail(String email) {
Email = email;
}
public String getContraseña() {
return Contraseña;
}
public void setContraseña(String contraseña) {
Contraseña = contraseña;
}
public Double getPos_x() {
return pos_x;
}
public void setPos_x(Double pos_x) {
this.pos_x = pos_x;
}
public Double getPos_y() {
return pos_y;
}
public void setPos_y(Double pos_y) {
this.pos_y = pos_y;
}
}
Entity Chef
public class Chef extends Usuario{
#SerializedName("id_chef")
private Integer id_chef;
#SerializedName("TipoServicio")
private String TipoServicio;
#SerializedName("Rating")
private Double Rating;
#SerializedName("EstadoChef")
private Boolean EstadoChef;
public Chef(){}
public Chef(Integer id_usuario,String NombreUsuario,String ApellidoUsuario,String TelefonoUsuario,String Email,String Contraseña,Double pos_x,Double pos_y,Integer id_chef,String TipoServicio,Double Rating,Boolean EstadoChef){
super(id_usuario,NombreUsuario,ApellidoUsuario,TelefonoUsuario,Email,Contraseña,pos_x,pos_y);
this.id_chef=id_chef;
this.TipoServicio=TipoServicio;
this.Rating=Rating;
this.EstadoChef=EstadoChef;
}
public Integer getId_chef() {
return id_chef;
}
public void setId_chef(Integer id_chef) {
this.id_chef = id_chef;
}
public String getTipoServicio() {
return TipoServicio;
}
public void setTipoServicio(String tipoServicio) {
TipoServicio = tipoServicio;
}
public Double getRating() {
return Rating;
}
public void setRating(Double rating) {
Rating = rating;
}
public Boolean getEstadoChef() {
return EstadoChef;
}
public void setEstadoChef(Boolean estadoChef) {
EstadoChef = estadoChef;
}
}
Chef Response
public class ChefResponse {
#SerializedName("results")
private Chef[] results;
public Chef[] getresults(){
return results;
}
}
RecyclerView Adapter
public class ListaChefsCercanos extends RecyclerView.Adapter<ListaChefsCercanos.ListaChefsCercanosViewHolder> {
private List<Chef> chefs;
private List<Usuario> usuarios;
private int rowLayout;
private Context context;
#Override
public ListaChefsCercanosViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(rowLayout, parent, false);
return new ListaChefsCercanosViewHolder(view);
}
#Override
public void onBindViewHolder(ListaChefsCercanosViewHolder holder, int position) {
holder.nombreschefscerca.setText(chefs.get(position).getNombreUsuario());
holder.ratingchef.setText(chefs.get(position).getRating().toString());
}
#Override
public int getItemCount() {
return chefs.size();
}
public static class ListaChefsCercanosViewHolder extends RecyclerView.ViewHolder{
LinearLayout chefslayout;
TextView nombreschefscerca;
TextView ratingchef;
public ListaChefsCercanosViewHolder(View v){
super(v);
chefslayout=(LinearLayout) v.findViewById(R.id.cheflayoutcerca);
nombreschefscerca=(TextView) v.findViewById(R.id.tv_NombreChefCercano);
ratingchef=(TextView) v.findViewById(R.id.tv_RatingChefCercano);
}
}
public ListaChefsCercanos(ArrayList <Chef> chefs){
this.chefs=chefs;
//this.rowLayout = rowLayout;
//this.context = context;
}
}
and the fragment
public class RecomendadosFragment extends Fragment {
private RatingBar ratingBar;
//ListAdapter adapter;
ArrayList<Chef> listachef;
ListView lvLista;
String tag_json_array="jarray req";
RecyclerView recyclerviewChefsCarnos;
ListaChefsCercanos mListaChefsCercanos;
private ArrayList<Chef> data;
private ListaChefsCercanos adapter;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View x = inflater.inflate(R.layout.recomendados,null);
//ratingBar = (RatingBar) x.findViewById(R.id.rb_RatingChefCercano);
recyclerviewChefsCarnos=(RecyclerView) x.findViewById(R.id.rv_chefsCernaos);
recyclerviewChefsCarnos.setLayoutManager(new LinearLayoutManager(getActivity().getApplicationContext()));
EndPointsInterface apiService = Conexion.getClient().create(EndPointsInterface.class);
Call<ChefResponse> call = apiService.GetChefsCercanos(5);
call.enqueue(new Callback<ChefResponse>() {
#Override
public void onResponse(Call<ChefResponse> call, Response<ChefResponse> response) {
int statusCode = response.code();
if (response.isSuccessful()) {
ChefResponse jsonResponse = response.body();
if(jsonResponse != null) {
data = new ArrayList<>(Arrays.asList(jsonResponse.getresults()));
adapter= new ListaChefsCercanos(data);
recyclerviewChefsCarnos.setAdapter(adapter);
}
} else {
// Do whatever you want if API is unsuccessful.
}
// List<Chef> chefs= response.body().getResults();
// recyclerviewChefsCarnos.setAdapter(new ListaChefsCercanos( chefs,R.layout.itemchefscercanos,getActivity().getApplicationContext()));
}
#Override
public void onFailure(Call<ChefResponse> call, Throwable t) {
Log.d("Error",t.getMessage());
}
});
return x;
}
this is the error I found while Im debuging
E/RecyclerView: No adapter attached; skipping layout
Update: Use a empty adapter for the RecyclerView in the OncreateView()
recyclerView.setAdapter(new YourAdapter(getCurrentActivity()));
I have just jumped to android with a very limited knowledge about recyclerview. I have used a a bit, but faced a situation where setting a text inside onBindViewHolder.Please bear with me.Check the following codes:
1.This is the json, here:
[
{
"restaurantSubscriptionType_Id": 1,
"noOfDaysPlan": "1 Day Trial Meal",
"restaurantSubscriptionEntity": [
{
"restaurantSubscriptionId": 39,
"subscriptionPlan": "Breakfast & Lunch",
"subscriptionImagePath": null,
"subscriptionDays": 1,
"subscriptionAmount": 150,
"restaurant_Subscription_Type_Id": 1
}
],
"restaurantId": 224
},
{
"restaurantSubscriptionType_Id": 2,
"noOfDaysPlan": "5 Days Weekly Plan",
"restaurantSubscriptionEntity": [
{
"restaurantSubscriptionId": 40,
"subscriptionPlan": "Breakfast & Lunch",
"subscriptionImagePath": null,
"subscriptionDays": 5,
"subscriptionAmount": 650,
"restaurant_Subscription_Type_Id": 2
},
{
"restaurantSubscriptionId": 41,
"subscriptionPlan": "Only Lunch",
"subscriptionImagePath": null,
"subscriptionDays": 5,
"subscriptionAmount": 500,
"restaurant_Subscription_Type_Id": 2
}
],
"restaurantId": 224
}
]
I have pojo2schema site
2.RestaurantSubscriptionEntity
public class RestaurantSubscriptionEntity {
private Integer restaurantSubscriptionId;
private String subscriptionPlan;
private String subscriptionImagePath;
private Integer subscriptionDays;
private Long subscriptionAmount;
private Integer restaurantSubscriptionTypeId;
public RestaurantSubscriptionEntity(){
}
public Integer getRestaurantSubscriptionId() {
return restaurantSubscriptionId;
}
public void setRestaurantSubscriptionId(Integer restaurantSubscriptionId) {
this.restaurantSubscriptionId = restaurantSubscriptionId;
}
public String getSubscriptionPlan() {
return subscriptionPlan;
}
public void setSubscriptionPlan(String subscriptionPlan) {
this.subscriptionPlan = subscriptionPlan;
}
public String getSubscriptionImagePath() {
return subscriptionImagePath;
}
public void setSubscriptionImagePath(String subscriptionImagePath) {
this.subscriptionImagePath = subscriptionImagePath;
}
public Integer getSubscriptionDays() {
return subscriptionDays;
}
public void setSubscriptionDays(Integer subscriptionDays) {
this.subscriptionDays = subscriptionDays;
}
public Long getSubscriptionAmount() {
return subscriptionAmount;
}
public void setSubscriptionAmount(Long subscriptionAmount) {
this.subscriptionAmount = subscriptionAmount;
}
public Integer getRestaurantSubscriptionTypeId() {
return restaurantSubscriptionTypeId;
}
public void setRestaurantSubscriptionTypeId(Integer restaurantSubscriptionTypeId) {
this.restaurantSubscriptionTypeId = restaurantSubscriptionTypeId;
}
3.DemoItemAll:
public class DemoItemAll {
private Integer restaurantSubscriptionTypeId;
private String noOfDaysPlan;
private List<RestaurantSubscriptionEntity> restaurantSubscriptionEntity = new ArrayList<RestaurantSubscriptionEntity>();
private Long restaurantId;
public DemoItemAll(){
}
public Integer getRestaurantSubscriptionTypeId() {
return restaurantSubscriptionTypeId;
}
public void setRestaurantSubscriptionTypeId(Integer restaurantSubscriptionTypeId) {
this.restaurantSubscriptionTypeId = restaurantSubscriptionTypeId;
}
public String getNoOfDaysPlan() {
return noOfDaysPlan;
}
public void setNoOfDaysPlan(String noOfDaysPlan) {
this.noOfDaysPlan = noOfDaysPlan;
}
public List<RestaurantSubscriptionEntity> getRestaurantSubscriptionEntity() {
return restaurantSubscriptionEntity;
}
public void setRestaurantSubscriptionEntity(List<RestaurantSubscriptionEntity> restaurantSubscriptionEntity) {
this.restaurantSubscriptionEntity = restaurantSubscriptionEntity;
}
public Long getRestaurantId() {
return restaurantId;
}
public void setRestaurantId(Long restaurantId) {
this.restaurantId = restaurantId;
}
4.Here my class which extends RecyclerView
public class DemoAdapter extends RecyclerView.Adapter<DemoAdapter.MyViewHolder> {
private List<DemoItemAll> demoItemAllArrayList = new ArrayList<>();
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
public static class MyViewHolder extends RecyclerView.ViewHolder {
private TextView title_tv,price_tv;
private Button drop_down_button;
public MyViewHolder(View itemView) {
super(itemView);
title_tv = (TextView) itemView.findViewById(R.id.day_plan_demo_tv_id);
price_tv = (TextView) itemView.findViewById(R.id.price_demo_tv_id);
drop_down_button = (Button) itemView.findViewById(R.id.demo_drop_down_btn_id);
}
}
public DemoAdapter(List<DemoItemAll> demoItemAllArrayList) {
this.demoItemAllArrayList = demoItemAllArrayList;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.demo_adapter, parent, false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
DemoItemAll demoItemAll=new DemoItemAll();
//noOfDays
holder.title_tv.setText(demoItemAll.getNoOfDaysPlan());
}
#Override
public int getItemCount() {
return demoItemAllArrayList.size();
}
}
now here inside onBindView,I need to set this but "subscriptionAmount"
belongs to RestaurantSubscriptionEntity class.How do I access it
holder.price_tv.setText //subscriptionAmount.
You just create new empty DemoItemAll object.
You need to use
DemoItemAll demoItemAll = demoItemAllArrayList.get(position);
instead of
DemoItemAll demoItemAll = new DemoItemAll();
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
DemoItemAll demoItemAll = demoItemAllArrayList.get(position);
List<RestaurantSubscriptionEntity> entity = demoItemAll.getRestaurantSubscriptionEntity();
holder.title_tv.setText(demoItemAll.getNoOfDaysPlan());
holder.price_tv.setText(String.valueOf(entity.getSubscriptionAmount()))
}