am trying to Fetch the movies data from Mysql DB and show it to Recycler view
but when i run the app nothing shows
here is code i am using Retrofite Library
but i can't parse the Data to the Recycler view
i've made Adapter and Model Class normally like the Json
MainActivity.class
public class MainActivity extends AppCompatActivity {
private static final String url="http://192.168.1.109/stu/";
RecyclerView recyclerViewMovies;
List<MovieListsModels> movies;
MoviesAdapter adapter;
TextView Errortxt;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Errortxt = (TextView)findViewById(R.id.txterror);
recyclerViewMovies = (RecyclerView)findViewById(R.id.recyclerview);
recyclerViewMovies.setHasFixedSize(true);
recyclerViewMovies.setLayoutManager(new LinearLayoutManager(this));
movies = new ArrayList<>();
loadDatafromServer();
}
private void loadDatafromServer() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(url)
.addConverterFactory(GsonConverterFactory.create())
.build();
Api api = retrofit.create(Api.class);
Call<MovieListsModels> call = api.ShowMoviesData();
call.enqueue(new Callback<MovieListsModels>() {
#Override
public void onResponse(Call<MovieListsModels> call, Response<MovieListsModels> response) {
try {
MovieListsModels movie = response.body();
adapter = new MoviesAdapter(MainActivity.this, (List<MovieListsModels>) movie);
recyclerViewMovies.setAdapter(adapter);
}
catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void onFailure(Call<MovieListsModels> call, Throwable t) {
Errortxt.setText(t.getMessage().toString());
}
});
}
this is the interface of the methods
Api.class Interface
public interface Api {
#GET("config.php")
Call<MovieListsModels> ShowMoviesData();
}
MovieLists.class
public class MovieListsModels {
public MovieListsModels() {
}
int id;
String movie_name;
String movie_image;
String movie_genre;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getMovie_name() {
return movie_name;
}
public void setMovie_name(String movie_name) {
this.movie_name = movie_name;
}
public String getMovie_image() {
return movie_image;
}
public void setMovie_image(String movie_image) {
this.movie_image = movie_image;
}
public String getMovie_genre() {
return movie_genre;
}
public void setMovie_genre(String movie_genre) {
this.movie_genre = movie_genre;
}
public MovieListsModels(int id, String movie_name, String movie_image, String movie_genre) {
this.id = id;
this.movie_name = movie_name;
this.movie_image = movie_image;
this.movie_genre = movie_genre;
}
}
MovieAdapter.class
public class MoviesAdapter extends RecyclerView.Adapter<MoviesAdapter.MovieHolderView> {
private Context mContext;
private List<MovieListsModels> MovieList = new ArrayList<>();
public MoviesAdapter(Context mContext, List<MovieListsModels> movieList) {
this.mContext = mContext;
MovieList = movieList;
}
#NonNull
#Override
public MovieHolderView onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item,parent,false);
MovieHolderView holder = new MovieHolderView(view);
return holder;
}
#Override
public void onBindViewHolder(#NonNull MovieHolderView holder, int position) {
MovieListsModels list = MovieList.get(position);
holder.txtName.setText(list.getMovie_name());
holder.txtGenre.setText(list.getMovie_genre());
Picasso.get()
.load(list.getMovie_image())
.into(holder.imgMovie);
}
#Override
public int getItemCount() {
return MovieList.size();
}
public class MovieHolderView extends RecyclerView.ViewHolder {
TextView txtName,txtGenre;
ImageView imgMovie;
public MovieHolderView(View itemView) {
super(itemView);
txtName =(TextView)itemView.findViewById(R.id.movieName);
txtGenre =(TextView)itemView.findViewById(R.id.movieGenre);
imgMovie =(ImageView)itemView.findViewById(R.id.movieImg);
}
}
}
If you receive a list of movies is better because you expect a list, I suppose
public void onResponse(Call<MovieListsModels> call, Response<MovieListsModels> response) {
try {
List<MovieListsModels> movie = response.body();
adapter = new MoviesAdapter(MainActivity.this, movies);
And I believe that not executing the notifyDataSetChanged, you can added like that:
private Context mContext;
private List<MovieListsModels> MovieList = new ArrayList<>();
public MoviesAdapter(Context mContext, List<MovieListsModels> movieList) {
this.mContext = mContext;
MovieList = movieList;
notifiyDataSetChanged();
If you are having json response of the form {..}, you are having an object response and you should expect an object as you have done i.e, Call<YourObject>
If you are having json response of the form [..], you are having an array response and you should expect an array i.e, Call<List<YourObject>>
In your case, i hope its an array(second case), So make changes as per the above answer done by #Guillodacosta
First don't forget to add the internet permission in your manifest file
<uses-permission android:name="android.permission.INTERNET" />
Second try this
Picasso.with(mContext).load(list.getMovie_image()).into(holder.imgMovie);
Related
I am making a simple app in which the user will able to search for books by its name, with google.com book api. For now, I wish to present a list of books with android in their name. I am doing it with Retrofit2 and RecycleView, but nothing is showing.
MainActivity:
public class MainActivity extends AppCompatActivity {
RecyclerView recyclerView;
KnjigaAdapter knjigaAdapter;
List<KnjigaModel> listaKnjiga;
public static final String BASE_URL = "https://www.googleapis.com/books/";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
uzmiKomentare();
}
public void uzmiKomentare() {
Gson gson = new GsonBuilder().serializeNulls().create();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create(gson))
.build();
KnjigaApi knjigaApi = retrofit.create(KnjigaApi.class);
final Call<KnjigaModel> pozivZaListuKnjiga = knjigaApi.getKnjige("android");
pozivZaListuKnjiga.enqueue(new Callback<KnjigaModel>() {
#Override
public void onResponse(Call<KnjigaModel> call, Response<KnjigaModel> response) {
if (!response.isSuccessful()) {
return;
}
//generateRecycleView(WHAT TO PUT HERE!!!!);
}
#Override
public void onFailure(Call<KnjigaModel> call, Throwable t) {
Log.d("MainActivity:", t.getMessage());
}
});
}
private void generateRecycleView(List<KnjigaModel> knjige) {
listaKnjiga = new ArrayList<>();
recyclerView = findViewById(R.id.recycleview);
knjigaAdapter = new KnjigaAdapter(this, knjige);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(knjigaAdapter);
if (knjigaAdapter.getItemCount() == 0){
Log.i("List is empty: ","YES");
}
else {
Log.i("list is empty: ","No");
}
}
}
api inteface:
public interface KnjigaApi {
#GET("v1/volumes")
Call<KnjigaModel> getKnjige(#Query("q") String knjiga);
}
model class:
public class KnjigaModel {
#SerializedName("title")
#Expose
private String imeKnjige;
#SerializedName("authors")
#Expose
private String imeAutora;
#SerializedName("thumbnail")
#Expose
private String slikaKnjige;
public KnjigaModel(String imeKnjige, String imeAutora,String slikaKnjige) {
this.imeKnjige = imeKnjige;
this.imeAutora = imeAutora;
this.slikaKnjige = slikaKnjige;
}
public String getImeKnjige() {
return imeKnjige;
}
public String getImeAutora() {
return imeAutora;
}
public String getSlikaKnjige() {
return slikaKnjige;
}
}
and my adapter:
public class KnjigaAdapter extends RecyclerView.Adapter<KnjigaAdapter.KomentariViewHolder> {
private List<KnjigaModel> listaKnjiga;
private LayoutInflater inflater;
private Context context;
public KnjigaAdapter(Context context, List<KnjigaModel> listaKnjiga) {
this.listaKnjiga = listaKnjiga;
this.context = context;
}
#Override
public KomentariViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
inflater = LayoutInflater.from(context);
// Inflate the custom layout
View postView = inflater.inflate(R.layout.single_item, parent, false);
// Return a new holder instance
return new KomentariViewHolder(postView);
}
#Override
public void onBindViewHolder(KomentariViewHolder holder, int position) {
KnjigaModel knjige = listaKnjiga.get(position);
holder.naslovKnjige.setText(knjige.getImeKnjige());
holder.imeAutora.setText(knjige.getImeAutora());
Glide.with(context)
.load(knjige.getSlikaKnjige())
.into(holder.slikaKnjige);
}
#Override
public int getItemCount() {
return listaKnjiga.size();
}
public class KomentariViewHolder extends RecyclerView.ViewHolder {
private TextView naslovKnjige;
private TextView imeAutora;
private ImageView slikaKnjige;
public KomentariViewHolder(View itemView) {
super(itemView);
naslovKnjige = itemView.findViewById(R.id.ime_knjige);
imeAutora = itemView.findViewById(R.id.autor_knjige);
slikaKnjige = itemView.findViewById(R.id.sika_korica);
}
}
}
my JSON format:
https://www.googleapis.com/books/v1/volumes?q=android
First of all, I strongly recommend to use RxJava for asynchronous requests, though it's totally optional.
Your Problem:
Your "getKnjige" Method returns only ONE Model, though the endpoint is named volumes (plural), you need to wrap your KnjigaModel in a class like
data class KnjigaResponse(val items: List<KnjigaModel>)
(Kotlin for simplicity, you can also generate a Java class with a single member volumes member that holds a list of KnjigaModel)
In addition, your model is wrong. authors is not a string, but a List of Strings, and "thumbnail" is wrapped in an "imageLinks" Object, and title is wrapped in a volumeInfo Object.
Your retrofit interface then would look like this:
public interface KnjigaApi {
#GET("v1/volumes")
Call<KnjigaResponse> getKnjige(#Query("q") String knjiga);
Request:
final Call<KnjigaResponse> pozivZaListuKnjiga = knjigaApi.getKnjige("android");
pozivZaListuKnjiga.enqueue(new Callback<KnjigaResponse>() {
#Override
public void onResponse(Call<KnjigaResponse> call, Response<KnjigaResponse> response) {
if (!response.isSuccessful()) {
return;
}
generateRecycleView(response.items);
}
#Override
public void onFailure(Call<KnjigaResponse> call, Throwable t) {
Log.d("MainActivity:", t.getMessage());
}
});
friends...
In my project, I am creating a list of images from the server and showing in Recyclerview.
now I want to remove a particular item from the list when I click on the verify button.
I tried to hide holder.itemview but its see again when I scroll.
I just want to remove or hide that item which is verified once.
here is my code :
1) Main activity
public class MainActivity extends AppCompatActivity {
private static final String url = "www.mysite.com/api/api-id-list.php?action=imgs";
private ProgressDialog mDetailProgress;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_main_activity);
LoadRecyclerView();
}
private void LoadRecyclerView() {
mDetailProgress = new ProgressDialog(this);
mDetailProgress.setTitle("Loading images");
mDetailProgress.setMessage("Please Wait...");
mDetailProgress.setCanceledOnTouchOutside(false);
mDetailProgress.show();
final RecyclerView imgList = (RecyclerView) findViewById(R.id.imgList);
imgList.setLayoutManager(new LinearLayoutManager(this));
StringRequest request = new StringRequest(url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
GsonBuilder gsonBuilder = new GsonBuilder();
Gson gson = gsonBuilder.create();
Image[] images = gson.fromJson(response, Image[].class);
imgList.setAdapter(new ImageAdapter(MainActivity.this, images));
mDetailProgress.dismiss();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getBaseContext(), "Something went wrong..!", Toast.LENGTH_LONG);
}
});
RequestQueue queue = Volley.newRequestQueue(this);
queue.add(request);
}}
2) ImageAdapter
public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.ImageViewHolder> {
private ProgressDialog mDetailProgress;
private Context context;
private Image[] data;
Button btn_ban, btn_verify;
private View view;
public ImageAdapter (Context context, Image[] data) {
this.context = context;
this.data = data;
}
#NonNull
#Override
public ImageViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int i) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
view = inflater.inflate(R.layout.single_item, parent, false);
return new ImageViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final ImageViewHolder holder, final int position) {
final Image imagelist = data[position];
holder.userCode.setText(imagelist.getCode());
Glide.with(holder.userImage.getContext()).load(imagelist.getIdPhoto()).into(holder.userImage);
btn_verify.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
holder.itemView.setVisibility(View.GONE);
}
});
}
#Override
public int getItemCount() { return data.length; }
public class ImageViewHolder extends RecyclerView.ViewHolder {
TextView userCode;
ImageView userImage;
public ImageViewHolder(#NonNull View itemView) {
super(itemView);
userImage = (ImageView) itemView.findViewById(R.id.card_iv_img);
userCode = (TextView) itemView.findViewById(R.id.card_tv_code);
btn_ban = (Button) itemView.findViewById(R.id.btn_ban);
btn_verify = (Button) itemView.findViewById(R.id.btn_verify);
}
}}
3) Image.java
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Image {
#SerializedName("per_ID")
#Expose
private String perID;
#SerializedName("code")
#Expose
private String code;
#SerializedName("first_nm")
#Expose
private String firstNm;
#SerializedName("last_nm")
#Expose
private String lastNm;
#SerializedName("photo_ID")
#Expose
private String photoID;
#SerializedName("id_photo")
#Expose
private String idPhoto;
public String getPerID() {
return perID;
}
public void setPerID(String perID) {
this.perID = perID;
}
public Image withPerID(String perID) {
this.perID = perID;
return this;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public Image withCode(String code) {
this.code = code;
return this;
}
public String getFirstNm() {
return firstNm;
}
public void setFirstNm(String firstNm) {
this.firstNm = firstNm;
}
public Image withFirstNm(String firstNm) {
this.firstNm = firstNm;
return this;
}
public String getLastNm() {
return lastNm;
}
public void setLastNm(String lastNm) {
this.lastNm = lastNm;
}
public Image withLastNm(String lastNm) {
this.lastNm = lastNm;
return this;
}
public String getPhotoID() {
return photoID;
}
public void setPhotoID(String photoID) {
this.photoID = photoID;
}
public Image withPhotoID(String photoID) {
this.photoID = photoID;
return this;
}
public String getIdPhoto() {
return idPhoto;
}
public void setIdPhoto(String idPhoto) {
this.idPhoto = idPhoto;
}
public Image withIdPhoto(String idPhoto) {
this.idPhoto = idPhoto;
return this;
}}
First make data not array, but List, so it's easy to remove item;
Secondly set listener for verify button inside ViewHolder and inside OnClick remove item and notify adapter.
btn_verify.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int position = getAdapterPosition();
data.remove(position);
notifyItemRemoved(position);
}
});
Note: Setting OnClickListener inside ViewHolder makes sure that only correct item is removed by using getAdapterPosition() to get correct position.
Position provided by onBindViewHolder might be invalid after new items are inserted.
I am trying to make a call to this api and am having difficulty as the response.body() is returning null.
http://demo.museum.vebrary.vn/api/stuff/getall
I want to get stuff name of list and show to my recyclerview.
My model:
public class SOAnswersResponse {
#SerializedName("StuffModels")
#Expose
private List<StuffModel> stuffModels = null;
public List<StuffModel> getStuffModels() {
return stuffModels;
}
public void setStuffModels(List<StuffModel> stuffModels) {
this.stuffModels = stuffModels;
}
and
public class StuffModel {
#SerializedName("STUFFID")
#Expose
private Integer sTUFFID;
#SerializedName("STUFFCODE")
#Expose
private String sTUFFCODE;
#SerializedName("STUFFNAME")
#Expose
private String sTUFFNAME;
#SerializedName("STUFFNOTE")
#Expose
private String sTUFFNOTE;
#SerializedName("STUFFORDER")
#Expose
private Integer sTUFFORDER;
#SerializedName("CUSTOMERID")
#Expose
private String cUSTOMERID;
#SerializedName("EXHIBITS")
#Expose
private List<Object> eXHIBITS = null;
Json response
{
"StuffModels":[
{
"STUFFID":2,
"STUFFCODE":"Gi",
"STUFFNAME":"Giấy",
"STUFFNOTE":"",
"STUFFORDER":2,
"CUSTOMERID":"CAMAU",
"EXHIBITS":[
]
},
ApiUtils Class
public class ApiUtils {
private ApiUtils() {
}
public static final String BASE_URL = "http://demo.museum.vebrary.vn/api/";
public static SOService getSOService() {
return RetrofitClient.getClient(BASE_URL).create(SOService.class);
}
}
Service interface
public interface SOService {
#GET("/stuff/getall")
Call<SOAnswersResponse> getAnswers();
}
RetrofitClient Class
public class RetrofitClient {
private static Retrofit retrofit = null;
public static Retrofit getClient(String baseUrl) {
if (retrofit==null) {
retrofit = new Retrofit.Builder()
.baseUrl(baseUrl)
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
}
My RecyclerView adapter
public class CategogyNameRecyclerViewAdapter extends RecyclerView.Adapter<CategogyNameRecyclerViewAdapter.ViewHolder> {
private List<StuffModel> mItems;
private Context mContext;
private PostItemListener mItemListener;
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public TextView titleTv;
PostItemListener mItemListener;
public ViewHolder(View itemView, PostItemListener postItemListener) {
super(itemView);
titleTv = itemView.findViewById(R.id.tvListMenuCategogy);
this.mItemListener = postItemListener;
itemView.setOnClickListener(this);
}
#Override
public void onClick(View view) {
StuffModel item = getItem(getAdapterPosition());
this.mItemListener.onPostClick(item.getSTUFFID());
notifyDataSetChanged();
}
}
public CategogyNameRecyclerViewAdapter(Context context, List<StuffModel> posts, PostItemListener itemListener) {
mItems = posts;
mContext = context;
mItemListener = itemListener;
}
#Override
public CategogyNameRecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Context context = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(context);
View postView = inflater.inflate(R.layout.item_list_text, parent, false);
ViewHolder viewHolder = new ViewHolder(postView, this.mItemListener);
return viewHolder;
}
#Override
public void onBindViewHolder(CategogyNameRecyclerViewAdapter.ViewHolder holder, int position) {
StuffModel item = mItems.get(position);
TextView textView = holder.titleTv;
textView.setText(item.getSTUFFNAME());
}
#Override
public int getItemCount() {
return mItems.size();
}
public void updateAnswers(List<StuffModel> items) {
mItems = items;
notifyDataSetChanged();
}
private StuffModel getItem(int adapterPosition) {
return mItems.get(adapterPosition);
}
public interface PostItemListener {
void onPostClick(long id);
}
}
And my main activity
public class Testttt extends AppCompatActivity {
private CategogyNameRecyclerViewAdapter mAdapter;
private RecyclerView mRecyclerView;
private SOService mService;
#Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView(R.layout.test );
mService = ApiUtils.getSOService();
mRecyclerView = (RecyclerView) findViewById(R.id.rcvCategogyNameMenuTest);
mAdapter = new CategogyNameRecyclerViewAdapter(this, new ArrayList<StuffModel>(0), new CategogyNameRecyclerViewAdapter.PostItemListener() {
#Override
public void onPostClick(long id) {
Toast.makeText(Testttt.this, "Post id is" + id, Toast.LENGTH_SHORT).show();
}
});
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(layoutManager);
mRecyclerView.setAdapter(mAdapter);
mRecyclerView.setHasFixedSize(true);
RecyclerView.ItemDecoration itemDecoration = new DividerItemDecoration(this, DividerItemDecoration.VERTICAL_LIST);
mRecyclerView.addItemDecoration(itemDecoration);
loadAnswers();
}
public void loadAnswers() {
mService.getAnswers().enqueue(new Callback<SOAnswersResponse>() {
#Override
public void onResponse(Call<SOAnswersResponse> call, Response<SOAnswersResponse> response) {
Toast.makeText(Testttt.this, "333333333333333333"+response.body(), Toast.LENGTH_SHORT).show();
if(response.isSuccessful()) {
mAdapter.updateAnswers(response.body().getStuffModels());
Log.d("AnswersPresenter", "posts loaded from API");
}else {
int statusCode = response.code();
}
}
#Override
public void onFailure(Call<SOAnswersResponse> call, Throwable t) {
showErrorMessage();
Log.d("AnswersPresenter", "error loading from API");
}
});
}
public void showErrorMessage() {
Toast.makeText(this, "Error loading posts", Toast.LENGTH_SHORT).show();
}
}
The first thing that came in my mind:
Your
public static final String BASE_URL = "http://demo.museum.vebrary.vn/api/";
has a "/" at the the end and your
#GET("/stuff/getall")
Call<SOAnswersResponse> getAnswers();
starts with a "/". So there is a double backslash in the url that might leads to the 404 code. Does this solve the problem?
When i call your URL i receive XML. Maybe the API is not configured correctly?
Change your Service interface
public interface SOService {
#GET("stuff/getall")
Call<SOAnswersResponse> getAnswers();
}
it occurred because you have use start with backslash it already added in your base url
I've get some Json data from server by okhttp ,and I want to show them in a
recycleview inside of a fragment using a custom adapter and receiving the following error.
when I run this code,the logcat tell me the followeing msg:
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.ArrayList.size()' on a null object reference
I print the list in the logcat ,it shows null.
but I can get some json data from the IE.Do anyone help me,please?
public class customer extends AppCompatActivity {
private static final String TAG = "MyDebug______ " ;
private RecyclerView cutomerRecyclerView;
private customerAdapter mAdapter;
private ArrayList<custModal> list;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_customer);
Toolbar toolbar = (Toolbar)findViewById(R.id.custom_toolbar);
setSupportActionBar(toolbar);
new getHttpData().execute();
Log.d(TAG, "the list is :" +list);
mAdapter = new customerAdapter(this,list);
cutomerRecyclerView = (RecyclerView)findViewById(R.id.customer_list);
cutomerRecyclerView.setLayoutManager(new LinearLayoutManager(this));
cutomerRecyclerView.setAdapter(mAdapter);
cutomerRecyclerView.addItemDecoration(new RecyclerView.ItemDecoration(){
#Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state){
super.onDraw(c,parent,state);
c.drawColor(R.color.colorDevider);
}
#Override
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
super.onDrawOver(c, parent, state);
}
#Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
super.getItemOffsets(outRect, view, parent, state);
outRect.offset(0,1);
}
});
}
public class customerAdapter extends RecyclerView.Adapter<customerAdapter.customerViewHolder>{
private Context mcontext;
private ArrayList<custModal> mlist;
// private LayoutInflater inflater;
class customerViewHolder extends RecyclerView.ViewHolder{
private TextView name,mem,cust_id;
public customerViewHolder(View view){
super(view);
cust_id = (TextView )view.findViewById(R.id.cust_id);
name = (TextView)view.findViewById(R.id.cust_name);
mem = (TextView)view.findViewById(R.id.cust_mem);
}
}
public customerAdapter(Context context,ArrayList<custModal> list){
this.mcontext = context;
this.mlist = list;
}
#Override
public customerViewHolder onCreateViewHolder(ViewGroup parent,int viewType){
customerViewHolder holder = new customerViewHolder(LayoutInflater.from(
customer.this).inflate(R.layout.customer_item,parent,false));
return holder;
}
#Override
public void onBindViewHolder(customerViewHolder holder,int position){
holder.cust_id.setText(mlist.get(position).getId());
holder.name.setText(mlist.get(position).getName());
holder.mem.setText(mlist.get(position).getMobiphone());
}
#Override
public int getItemCount(){ return mlist.size();}
}
class custModal {
private String id;
private String name;
private String gender;
private String mobiphone;
private String creat_time;
public void setId(String id) {
this.id = id;
}
public String getId() {
return id;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getGender() {
return gender;
}
public void setMobiphone(String mobiphone) {
this.mobiphone = mobiphone;
}
public String getMobiphone() {
return mobiphone;
}
public void setCreat_time(String creat_time) {
this.creat_time = creat_time;
}
public String getCreat_time() {
return creat_time;
}
}
public class getHttpData extends AsyncTask<String,Integer,ArrayList<custModal> >{
//private ArrayList<custModal> custlist;
#Override
// protected void onPreExecute(){}
#Override
protected ArrayList<custModal> doInBackground(String... params){
String url = "http://aaaa.bbbbb.cn/index.php/mobi/customer/app_getlist";
try{
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(url)
.build();
Response response = client.newCall(request).execute();
String responseData = response.body().string();
Log.d(TAG, "doInBackground: "+ responseData);
if(responseData != null){
//return getCustFromJson(responseData);
Gson gson = new Gson();
ArrayList<custModal> custlist = gson.fromJson(responseData,
new TypeToken<List<custModal>>() {}.getType()
);
return custlist;
}else{
return null;
}
}catch (IOException I){
I.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(ArrayList<custModal> custlist){
if(!custlist.isEmpty()){
super.onPostExecute(custlist);
list = custlist;
mAdapter.notifyDataSetChanged();
}
}
}
}
make sure initialize adapter, array list of adapter and attaching adapter to recycler in onCreate
You have to then add the new yourAsyncTask().execute where you need to to http call.
In your onBackground add items to the array list and in postExecute simply call notify data change method
Your list is in a null state when you pass it via adapter constructor therefore any operations on the list return null.
You could add a callback to your okhttp request and construct the adapter on the response? One way or another though you need to update the list before you can perform any operations on it.
I put the following code into the Method onPostExecute,it worked.But I think it is not a right solution.like this:
protected void onPostExecute(ArrayList<custModal> custlist){
Log.d(TAG, "onPostExecute(Result result) called");
Log.d(TAG, "onPostExecute: "+custlist);
mAdapter = new customerAdapter(customer.this,custlist);
cutomerRecyclerView = (RecyclerView)findViewById(R.id.customer_list);
cutomerRecyclerView.setLayoutManager(new LinearLayoutManager(customer.this));
cutomerRecyclerView.setAdapter(mAdapter);
}
I am trying to make a service call with Retrofit and RxJava. I am using Picasso 2.5.2 to upload image from the API call. I am getting the image displayed, but i am getting single image only. When I debug, I get size as 20 but the displayed is single. Any help on that would be great.
The Adapter class:
public class PopularMoviesAdapter extends RecyclerView.Adapter<PopularMoviesAdapter.MoviesViewHolder> {
private final String TAG = PopularMoviesAdapter.class.getSimpleName();
private Context context;
private List<MoviesResponse> movieItems = new ArrayList<>();
public PopularMoviesAdapter(Context context, List<MoviesResponse> movieItems) {
this.context = context;
this.movieItems = movieItems;
}
#Override
public MoviesViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.movies_grid_item, parent, false);
return new MoviesViewHolder(view);
}
#Override
public void onBindViewHolder(MoviesViewHolder holder, int position) {
List<Movies> movies = movieItems.get(position).getResults();
String imageUrl = IntentKeys.MOVIES_POSTER_ENDPOINT + movies.get(position).getPosterPath();
Log.d(TAG, "Poster URL from the API call: " + imageUrl);
Picasso.with(context).load(imageUrl).into(holder.imageView);
Glide.with(context).load(imageUrl).into(holder.imageView);
}
#Override
public int getItemCount() {
return movieItems.size();
}
class MoviesViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
public MoviesViewHolder(View itemView) {
super(itemView);
imageView = (ImageView) itemView.findViewById(R.id.movies_grid_item_image);
}
}}
The fragment class:
public class PopularMoviesFragment extends Fragment {
private static final int COLUMN_COUNT = 2;
private List<MoviesResponse> responses;
private RecyclerView recyclerView;
private PopularMoviesAdapter popularMoviesAdapter;
private Subscription subscription;
private MoviesService service = RetrofitManager.getMoviesClient().create(MoviesService.class);
public PopularMoviesFragment() {
responses = new ArrayList<>();
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_popular_movies, container, false);
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(
getActivity(),
COLUMN_COUNT,
LinearLayoutManager.VERTICAL,
false);
recyclerView = (RecyclerView) view.findViewById(R.id.popular_movies_recycler_view);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(layoutManager);
recyclerView.addItemDecoration(new GridSpacingItemDecoration(COLUMN_COUNT, dpToPx(10), true));
recyclerView.setItemAnimator(new DefaultItemAnimator());
return view;
}
private int dpToPx(int dp) {
Resources r = getResources();
return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, r.getDisplayMetrics()));
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
#Override
public void onStart() {
super.onStart();
getMoviesSubscription();
}
private void getMoviesSubscription() {
subscription = service.getPopularMovies(IntentKeys.POPULAR_MOVIES_API_KEY)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(
new Action1<MoviesResponse>() {
#Override
public void call(MoviesResponse movies) {
responses.add(movies);
}
}, new Action1<Throwable>() {
#Override
public void call(Throwable throwable) {
}
}, new Action0() {
#Override
public void call() {
displayPosters();
}
}
);
}
private void displayPosters() {
popularMoviesAdapter = new PopularMoviesAdapter(getContext(), responses);
recyclerView.setAdapter(popularMoviesAdapter);
recyclerView.invalidate();
}
#Override
public void onDestroyView() {
super.onDestroyView();
if (subscription != null && subscription.isUnsubscribed()) {
subscription.unsubscribe();
}
}
}
Finally the layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/movies_grid_item"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/movies_grid_item_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"/>
</LinearLayout>
POJO:
public class Movies implements Serializable {
private String posterPath;
private Boolean adult;
private String overview;
private String releaseDate;
private List<Integer> genreIds = new ArrayList<Integer>();
private Integer id;
private String originalTitle;
private String originalLanguage;
private String title;
private String backdropPath;
private Float popularity;
private Integer voteCount;
private Boolean video;
private Float voteAverage;
// getters and setters ommitted and constructor
}
public class MoviesResponse implements Serializable {
private Integer page;
private List<Movies> results = new ArrayList<Movies>();
private Integer totalResults;
private Integer totalPages;
// getters and setters ommitted and constructor
}
Thanks!
Try
Context context = holder.itemView.getContext();
in your onBindViewHolder, so that you don't pass context around.
Also try adding popularMoviesAdapter.notifyDataSetChanged() in your fragment. Do you mind uploading your POJO?
in your adapter
public PopularMoviesAdapter(List<Movie> movies) {
this.movies = movies;
}
in your fragment
.subscribe(
new Action1<MoviesResponse>() {
#Override
public void call(MoviesResponse movies) {
responses.add(movies.getResults());
popularMoviesAdapter.notifyDataSetChanged()
}
}
Change
#Override
public void onBindViewHolder(MoviesViewHolder holder, int position) {
List<Movies> movies = movieItems.get(position);
String imageUrl = IntentKeys.MOVIES_POSTER_ENDPOINT + movies.get(position).getPosterPath();
Log.d(TAG, "Poster URL from the API call: " + imageUrl);
Picasso.with(context).load(imageUrl).into(holder.imageView);
Glide.with(context).load(imageUrl).into(holder.imageView);
}
This is your code to set adapter
popularMoviesAdapter = new PopularMoviesAdapter(getContext(), responses); recyclerView.setAdapter(popularMoviesAdapter);
your ArrayList responses = new ArrayList() // this is your arraylist which you are providing to adapter
debug and check size of responses that how many records will return i think it has on one object
i think your array is somewhat like this
responses [{
0,{
}
}];
so passs
popularMoviesAdapter = new PopularMoviesAdapter(getContext(), responses.get(0).getResults
); recyclerView.setAdapter(popularMoviesAdapter);