Develop Reference

Calculating Price * Quantity from Adapter to Total Price from Activity

I want to get total price in Activity from Price and Quantity in Adapter, it's mean like qty * price = total_price.
Here is my Adapter for handling the list of Items Activity:
package com.example.aulaherbalfinal.Adapter;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.example.aulaherbalfinal.Model.DataModel;
import com.example.aulaherbalfinal.R;
import java.text.NumberFormat;
import java.util.List;
import java.util.Locale;
public class AdapterDataPembelian extends RecyclerView.Adapter<AdapterDataPembelian.HolderDataPembelian>{
private Context ctx;
private List<DataModel> listDataPembelian;
private int count;
public AdapterDataPembelian(Context ctx, List<DataModel> listDataPembelian) {
this.ctx = ctx;
this.listDataPembelian = listDataPembelian;
}
#NonNull
#Override
public HolderDataPembelian onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View layout = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_item_pembelian, parent, false);
HolderDataPembelian holder = new HolderDataPembelian(layout);
return holder;
}
#Override
public void onBindViewHolder(#NonNull HolderDataPembelian holder, int position) {
DataModel dm = listDataPembelian.get(position);
holder.tvId.setText(String.valueOf(dm.getId()));
holder.tvBarang.setText(dm.getBarang());
holder.tvStok.setText("Stok : "+String.valueOf(dm.getStok()));
holder.tvHarga.setText(formatRupiah(Double.parseDouble(String.valueOf(dm.getHarga()))));
holder.jmlBarang.setText(String.valueOf(dm.getQuantity()));
//holder.totalHarga.setText(String.valueOf(dm.getTotalHarga()));
Intent intent = new Intent("custom-message");
holder.btnRemove.setOnClickListener(v -> {
minusCartItem(holder,listDataPembelian.get(position));
});
holder.btnAdd.setOnClickListener(v -> {
plusCartItem(holder,listDataPembelian.get(position));
});
}
private void plusCartItem(HolderDataPembelian holder, DataModel dataModel) {
dataModel.setQuantity(dataModel.getQuantity()+1);
//dataModel.setTotalHarga(Integer.parseInt(String.valueOf(dataModel.getQuantity()*Double.parseDouble(String.valueOf(dataModel.getHarga())))));
holder.jmlBarang.setText(new StringBuilder().append(dataModel.getQuantity()));
}
private void minusCartItem(HolderDataPembelian holder, DataModel dataModel) {
if (dataModel.getQuantity() > 0){
dataModel.setQuantity(dataModel.getQuantity()-1);
//dataModel.setTotalHarga(Integer.parseInt(String.valueOf(dataModel.getQuantity()*Double.parseDouble(String.valueOf(dataModel.getHarga())))));
holder.jmlBarang.setText(new StringBuilder().append(dataModel.getQuantity()));
} else {
holder.jmlBarang.setText("0");
}
}
#Override
public int getItemCount() {
return listDataPembelian.size();
}
public class HolderDataPembelian extends RecyclerView.ViewHolder {
TextView tvId, tvBarang, tvStok, tvHarga;
Button btnAdd, btnRemove;
TextView jmlBarang, totalHarga;
public HolderDataPembelian(#NonNull View itemView) {
super(itemView);
tvId = itemView.findViewById(R.id.tv_id);
tvBarang = itemView.findViewById(R.id.tv_barang);
tvStok = itemView.findViewById(R.id.tv_stok);
tvHarga = itemView.findViewById(R.id.tv_harga);
btnAdd = itemView.findViewById(R.id.btn_add);
btnRemove = itemView.findViewById(R.id.btn_remove);
jmlBarang = itemView.findViewById(R.id.jml_barang);
totalHarga = itemView.findViewById(R.id.total_harga);
}
}
private String formatRupiah(Double number){
Locale localeID = new Locale("IND", "ID");
NumberFormat numberFormat = NumberFormat.getCurrencyInstance(localeID);
String formatRupiah = numberFormat.format(number);
String[] split = formatRupiah.split(",");
int length = split[0].length();
return split[0].substring(0,2)+". "+split[0].substring(2,length);
}
public int getTotalPrice(){
int totalPrice = 0;
for (int i=0 i<listDataPembelian.size(); i++){
}
}
}
And here is my Activity
package com.example.aulaherbalfinal.Activity;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.cardview.widget.CardView;
import androidx.localbroadcastmanager.content.LocalBroadcastManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
import android.annotation.SuppressLint;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import com.example.aulaherbalfinal.API.APIRequestData;
import com.example.aulaherbalfinal.API.RetroServer;
import com.example.aulaherbalfinal.Adapter.AdapterDataPembelian;
import com.example.aulaherbalfinal.Model.DataModel;
import com.example.aulaherbalfinal.Model.ResponseModel;
import com.example.aulaherbalfinal.R;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import java.util.ArrayList;
import java.util.List;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
public class PembelianActivity extends AppCompatActivity {
private RecyclerView rvData;
private RecyclerView.Adapter adData;
private RecyclerView.LayoutManager lmData;
private List<DataModel> listDataPembelian = new ArrayList<>();
private SwipeRefreshLayout srlData;
private ProgressBar pbData;
private TextView totalHarga;
private EditText jmlBarang;
#SuppressLint("ClickableViewAccessibility")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pembelian);
rvData = findViewById(R.id.rv_data);
lmData = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
rvData.setLayoutManager(lmData);
srlData = findViewById(R.id.srl_data);
pbData = findViewById(R.id.pb_data);
totalHarga = findViewById(R.id.total_harga);
jmlBarang = findViewById(R.id.jml_barang);
totalHarga = findViewById(R.id.total_harga);
//retrieveData();
CardView cvTotal = findViewById(R.id.cv_total);
rvData.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_MOVE){
cvTotal.setVisibility(View.INVISIBLE);
}
if (event.getAction() == MotionEvent.ACTION_UP){
cvTotal.setVisibility(View.VISIBLE);
}
return false;
}
});
BottomNavigationView bottom_navigation = findViewById(R.id.bottom_navigation);
bottom_navigation.setItemIconTintList(null);
bottom_navigation.setSelectedItemId(R.id.navigation_pembelian);
ImageView profile =findViewById(R.id.profile);
profile.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(PembelianActivity.this, ProfileActivity.class);
startActivity(intent);
finish();
}
});
bottom_navigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch ( (item.getItemId())){
case R.id.navigation_stok:
startActivity(new Intent(getApplicationContext(), MainActivity.class));
overridePendingTransition(0, 0);
return true;
case R.id.navigation_pembelian:
return true;
case R.id.navigation_penjualan:
startActivity(new Intent(getApplicationContext(), PenjualanActivity.class));
overridePendingTransition(0, 0);
return true;
}
return false;
}
});
srlData.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
srlData.setRefreshing(true);
retrieveData();
srlData.setRefreshing(false);
}
});
}
#Override
protected void onResume() {
super.onResume();
retrieveData();
}
public void retrieveData(){
pbData.setVisibility(View.VISIBLE);
APIRequestData ardData = RetroServer.konekRetrofit().create(APIRequestData.class);
Call<ResponseModel> tampildata = ardData.ardRetrieveData();
tampildata.enqueue(new Callback<ResponseModel>() {
#Override
public void onResponse(Call<ResponseModel> call, Response<ResponseModel> response) {
int kode = response.body().getKode();
String pesan = response.body().getPesan();
//Toast.makeText(MainActivity.this, "Kode : "+kode+" | Pesan : "+pesan, Toast.LENGTH_SHORT).show();
listDataPembelian = response.body().getData();
adData = new AdapterDataPembelian(PembelianActivity.this, listDataPembelian);
rvData.setAdapter(adData);
adData.notifyDataSetChanged();
pbData.setVisibility(View.INVISIBLE);
}
#Override
public void onFailure(Call<ResponseModel> call, Throwable t) {
Toast.makeText(PembelianActivity.this, "Gagal Menghubungi Server", Toast.LENGTH_SHORT).show();
pbData.setVisibility(View.INVISIBLE);
}
});
}
}
Here is my app

I would do something like this:
Create an Interface for your activity to implement:
public interface CallbackIF {
double tally(double amount, int quantity)
}
public class PembelianActivity extends AppCompatActivity implements CallbackIF {
#Override
public double tally(double amount, int quantity) {
return amount * quantity;
}
}
Then when you initialize your recyclerview adapter pass in the interface like so:
adData = new AdapterDataPembelian(PembelianActivity.this, listDataPembelian, PembelianActivity.this);
And change your constructor for the data adapter to be
private CallbackIF callback;
public AdapterDataPembelian(Context ctx, List<DataModel> listDataPembelian, CallbackIF callback) {
this.ctx = ctx;
this.listDataPembelian = listDataPembelian;
this.callback = callback;
}
Then in your onClicklistener for your list / wherever you want to trigger a tally just call
double value = callback.tally(amount, quantity);
If you have any questions please ask

How to send Data when cardview clicked to detail content

I try to passing data from cardview when clicked to DetailFragment, in this case I try to use interface in my adapter, but I get an error a null object reference in mOnItemClickListener.onClick(i).
I try to passing data from cardview when clicked to DetailFragment, in this case I try to use interface in my adapter.
I want to passing data to DetailMoviesFragment Class.
this is my CardviewMovieAdapter Class
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import java.util.ArrayList;
public class CardviewMovieAdapter extends RecyclerView.Adapter<CardviewMovieAdapter.CardViewViewHolder> {
private ArrayList<Movie> listMovie;
Context context;
OnItemClickListener mOnItemClickListener;
public void setListMovie(ArrayList<Movie> listMovie) {
this.listMovie = listMovie;
}
public ArrayList<Movie> getListMovie() {
return listMovie;
}
public interface OnItemClickListener {
void onClick(int position);
}
public void setOnItemClickListener(final OnItemClickListener mItemClickListener) {
this.mOnItemClickListener = mItemClickListener;
}
public CardviewMovieAdapter(ArrayList<Movie> listMovie, Context context) {
this.listMovie = listMovie;
this.context = context;
}
#NonNull
#Override
public CardviewMovieAdapter.CardViewViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_movie, viewGroup,false);
return new CardViewViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final CardviewMovieAdapter.CardViewViewHolder cardViewViewHolder, final int i) {
final Movie movie = listMovie.get(i);
Glide.with(cardViewViewHolder.itemView.getContext())
.load(movie.getImageMovie())
.apply(new RequestOptions().override(350, 550))
.into(cardViewViewHolder.imgPhoto);
cardViewViewHolder.tvTitle.setText(movie.getTitleMovie());
cardViewViewHolder.tvDesc.setText(movie.getDescription());
cardViewViewHolder.btnDetail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(cardViewViewHolder.itemView.getContext(), "Detail "+
listMovie.get(cardViewViewHolder.getAdapterPosition()).getTitleMovie(), Toast.LENGTH_SHORT).show();
}
});
cardViewViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(cardViewViewHolder.itemView.getContext(), "Kamu Memilih "+movie.getTitleMovie(), Toast.LENGTH_SHORT).show();
mOnItemClickListener.onClick(i);
}
});
// cardViewViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
// #Override
// public void onClick(View v) {
// Toast.makeText(cardViewViewHolder.itemView.getContext(), "Kamu Memilih "+movie.getTitleMovie(), Toast.LENGTH_SHORT).show();
// }
// });
}
#Override
public int getItemCount() {
return listMovie.size();
}
public class CardViewViewHolder extends RecyclerView.ViewHolder {
ImageView imgPhoto;
TextView tvTitle, tvDesc;
Button btnDetail;
public CardViewViewHolder(#NonNull View itemView) {
super(itemView);
imgPhoto = itemView.findViewById(R.id.img_item_photo);
tvTitle = itemView.findViewById(R.id.tv_title);
tvDesc = itemView.findViewById(R.id.tv_desc);
btnDetail = itemView.findViewById(R.id.btn_detail);
}
}
}
This is my MoviesFragment Class
import android.content.Intent;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.widget.CardView;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ListView;
import java.util.ArrayList;
/**
* A simple {#link Fragment} subclass.
*/
public class MoviesFragment extends Fragment implements View.OnClickListener{
private RecyclerView rvMovie;
private String[] dataMovieTitle;
private String[] dataDescription;
private TypedArray dataPhoto;
private ArrayList<Movie> movies;
Button btnDetail;
private CardviewMovieAdapter adapter;
View view;
final static String KEY = "KEY";
public MoviesFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
view = inflater.inflate(R.layout.fragment_movies, container, false);
//adapter = new CardviewMovieAdapter(movies,getContext());
rvMovie = view.findViewById(R.id.rv_movies);
prepare();
addItem();
showRecyclerCardView();
adapter = new CardviewMovieAdapter(movies, getContext());
adapter.setOnItemClickListener(new CardviewMovieAdapter.OnItemClickListener() {
#Override
public void onClick(int position) {
final Movie movie = movies.get(position);
DetailMoviesFragment detailMoviesFragment = new DetailMoviesFragment();
// Bundle mBundle = new Bundle();
// mBundle.putString(detailMoviesFragment.EXTRA_TITLE, movie.getTitleMovie());
// mBundle.putString(detailMoviesFragment.EXTRA_DESCRIPTION, movie.getDescription());
// mBundle.putInt(detailMoviesFragment.EXTRA_PHOTO, movie.getImageMovie());
// detailMoviesFragment.setArguments(mBundle);
MoviesFragment.newInstance(movie.getTitleMovie(), movie.getDescription(), movie.getImageMovie());
FragmentManager mFragmentManager = getFragmentManager();
if (mFragmentManager!= null) {
FragmentTransaction mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.replace(R.id.containterFragment, detailMoviesFragment, DetailMoviesFragment.class.getSimpleName());
mFragmentTransaction.addToBackStack(null);
mFragmentTransaction.commit();
}
}
});
return view;
}
public static MoviesFragment newInstance(String title, String desc, int image) {
MoviesFragment moviesFragment = new MoviesFragment();
Bundle args = new Bundle();
args.putInt("image", image);
args.putString("title", title);
args.putString("desc", desc);
moviesFragment.setArguments(args);
return moviesFragment;
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
private void showRecyclerCardView(){
rvMovie.setLayoutManager(new LinearLayoutManager(getActivity()));
CardviewMovieAdapter adapter = new CardviewMovieAdapter(movies,getActivity());
rvMovie.setAdapter(adapter);
}
private void prepare() {
dataMovieTitle = getResources().getStringArray(R.array.data_movie_name);
dataDescription = getResources().getStringArray(R.array.data_desc_movie);
dataPhoto = getResources().obtainTypedArray(R.array.data_photo_movie);
}
private void addItem(){
movies = new ArrayList<>();
for (int i=0; i < dataMovieTitle.length; i++){
Movie movie = new Movie();
movie.setImageMovie(dataPhoto.getResourceId(i, -1));
movie.setTitleMovie(dataMovieTitle[i]);
movie.setDescription(dataDescription[i]);
movies.add(movie);
}
}
#Override
public void onClick(View v) {
if(v.getId() == R.id.card_view){
}
}
}
and this is DetailMoviesActivity Class
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import com.squareup.picasso.Picasso;
public class DetailMovieActivity extends AppCompatActivity {
Movie movie;
TextView tvTitle, tvDesc;
ImageView ivMovie;
Button btnDetail;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail_movie);
initView();
}
private void initView() {
movie = (Movie) getIntent().getSerializableExtra("informasi");
String judul = movie.getTitleMovie();
String desc = movie.getDescription();
int img = movie.getImageMovie();
tvTitle.setText(judul);
tvDesc.setText(desc);
Picasso.get().load(img).into(ivMovie);
}
}

You can try with delete the setOnItemClickListener and call intent from cardViewViewHolder.itemView.setOnClickListener

Get an error : com.android.volley.ParseError: org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONArray

I try to get data from the database via API but the recyclerview doesn't display anything and the log displays an error.
This is my code
Fragment
package com.example.hp.retailmakanan;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import com.example.hp.retailmakanan.Model.MenuModel;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class FragHome extends Fragment {
RecyclerView recV;
BottomNavigationView top_navigation;
HomeAdapter listAdapter;
List<MenuModel> listMenu= new ArrayList<>();
private BottomNavigationView.OnNavigationItemSelectedListener onNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
Fragment sfragment = null;
switch (menuItem.getItemId()) {
case R.id.nav_noodle:
recV.setAdapter(listAdapter);
break;
case R.id.nav_beverage:
recV.setAdapter(listAdapter);
break;
case R.id.nav_toping:
recV.setAdapter(listAdapter);
break;
case R.id.nav_cari:
recV.setAdapter(listAdapter);
break;
}
return false;
}
};
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.act_home, container, false);
recV = (RecyclerView) v.findViewById(R.id.rec_ramen);
getData();
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
recV.setLayoutManager(layoutManager);
listAdapter = new HomeAdapter(listMenu, getActivity());
recV.setAdapter(listAdapter);
top_navigation = (BottomNavigationView) v.findViewById(R.id.top_nav);
top_navigation.setOnNavigationItemSelectedListener(onNavigationItemSelectedListener);
return v;
}
this is the code that i used to get data
private void getData() {
String url ="https://waggish-requisition.000webhostapp.com/GetAllMenu.php";
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
listMenu.clear();
for (int i = 0; i < response.length(); i++) {
try {
Log.d("menu",response.toString());
JSONObject jsonObject = response.getJSONObject(i);
String id_menu = jsonObject.getString("id");
String nama_menu = jsonObject.getString("nama_menu");
String deskripsi = jsonObject.getString("deskripsi");
int harga = jsonObject.getInt("harga");
MenuModel menus = new MenuModel(id_menu,nama_menu,deskripsi,harga);
listMenu.add(menus);
System.out.println(menus);
//Toast.makeText(this,"Download data "+i,Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
e.printStackTrace();
Log.d("menu",e.toString());
}
listAdapter.notifyDataSetChanged();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley", error.toString());
}
});
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
requestQueue.add(jsonArrayRequest);
}
}
Adapter
package com.example.hp.retailmakanan;
import android.content.Context;
import android.provider.ContactsContract;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.hp.retailmakanan.Model.MenuModel;
import java.util.Arrays;
import java.util.List;
public class HomeAdapter extends RecyclerView.Adapter {
private List<MenuModel> menus;
private Context context;
public HomeAdapter(List<MenuModel> menus, Context context) {
this.context = context;
this.menus = menus;
//System.out.println(menus);
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.recv_desain, viewGroup, false);
return new ListViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder viewHolder, int pos) {
}
#Override
public int getItemCount() {
return menus.size();
}
public class ListViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
TextView mText,txt2, txt3, txtQty;
ImageView img;
Button btnMin, btnPlus;
int x;
public ListViewHolder(View itemView){
super(itemView);
mText = itemView.findViewById(R.id.text_item);
txt2 = itemView.findViewById(R.id.text_item2);
txt3 = itemView.findViewById(R.id.textView3);
img = itemView.findViewById(R.id.image_item);
btnMin = itemView.findViewById(R.id.buttonMinMenu);
btnPlus = itemView.findViewById(R.id.buttonPlusMenu);
txtQty = itemView.findViewById(R.id.textQtyMenu);
itemView.setOnClickListener(this);
}
public void bindView (int pos){
x=0;
MenuModel model = menus.get(pos);
mText.setText(model.getNama_menu());
txt2.setText(model.getDeskripsi());
txt3.setText(model.getHarga());
//img.setImageResource(DataMenu.picture[pos]);
txtQty.setText(String.valueOf(x));
btnPlus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
x++;
txtQty.setText(String.valueOf(x));
}
});
btnMin.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
x--;
if (x<=0){
x=0;
txtQty.setText(String.valueOf(x));
}else if (x>0){
txtQty.setText(String.valueOf(x));
}
}
});
}
#Override
public void onClick(View v) {
}
}
}
And this is my php code
<?php
require_once('connection.php');
//public $mServerName;
//public $mConnectionInfo;
//public $conn;
//Create query to retrieve all contacts
$query = "SELECT * FROM menu";
$stmt = mysqli_query($conn, $query);
if (!$stmt)
{
//Query failed
echo 'Query failed';
}
else
{
$menus= array(); //Create an array to hold all of the contacts
//Query successful, begin putting each contact into an array of contacts
while ($row = mysqli_fetch_array($stmt)) //While there are still contacts
{
//Create an associative array to hold the current contact
//the names must match exactly the property names in the contact class in our C# code.
$menu= array("id" => $row['id_menu'],
"deskripsi" => $row['Deskripsi'],
"nama_menu" => $row['nm_menu'],
"harga" => $row['harga_menu'],
"ImageUrl" =>$row['gambar']
);
//Add the contact to the contacts array
array_push($menus, $menu);
}
//Echo out the contacts array in JSON format
echo json_encode($menus);
}
?>
I changed JSONObject to JSONArray, but that caused many other errors. I am a beginner please help me. I really don't know what to do :(

Parsing JSON data & Load it in Fragments

Excuse me i already had an Application which Display my Sites articles and Novels in Android the codes in Main Activity to display only one Section
i create in the site 5 sections every section had a different content
i Added items to Navigation Drawers and i defined the fragment and its connectivity but the Problem in the Code i failed so
i want to know how to load Data in 4 Fragments
RecyclerViewAdapter.class
import android.content.Context;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.squareup.picasso.Picasso;
import java.util.List;
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private int previousPosition = 0;
private List<com.salim3dd.recyclerview_moredata.List_Item> List_Item;
private Context context;
public RecyclerViewAdapter(List<List_Item> list_Item, Context context) {
List_Item = list_Item;
this.context = context;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View menu1 = LayoutInflater.from(viewGroup.getContext()).inflate(
R.layout.row_item, viewGroup, false);
return new MenuItemViewHolder(menu1);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
MenuItemViewHolder menuItemHolder = (MenuItemViewHolder) holder;
menuItemHolder.TextName.setText(List_Item.get(position).getStory());
Picasso.with(context).load(List_Item.get(position).getImg_link()).into(menuItemHolder.imageView);
menuItemHolder.imageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(context, List_Item.get(position).getStory(), Toast.LENGTH_SHORT).show();
}
});
if (position > previousPosition) { //scrolling DOWN
AnimationUtil.animate(menuItemHolder, true);
} else { // scrolling UP
AnimationUtil.animate(menuItemHolder, false);
}
previousPosition = position;
}
#Override
public int getItemCount() {
return (null != List_Item ? List_Item.size() : 0);
}
protected class MenuItemViewHolder extends RecyclerView.ViewHolder {
private CardView cardView;
private ImageView imageView;
private TextView TextName;
public MenuItemViewHolder(View view) {
super(view);
cardView = (CardView) view.findViewById(R.id.cardView);
imageView = (ImageView) view.findViewById(R.id.imageView);
TextName = (TextView) view.findViewById(R.id.TextName);
}
}
}
MainActivity
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.salim3dd.recyclerview_moredata.CheckInternetConnection;
import com.salim3dd.recyclerview_moredata.List_Item;
import com.salim3dd.recyclerview_moredata.R;
import com.salim3dd.recyclerview_moredata.RecyclerViewAdapter;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private RecyclerViewAdapter recyclerView_dAdapter;
public List<List_Item> listItem = new ArrayList<>();
private GridLayoutManager gridLayoutManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView) findViewById(R.id.m_RecyclerView);
recyclerView.setHasFixedSize(true);
gridLayoutManager = new GridLayoutManager(this, 1);
recyclerView.setLayoutManager(gridLayoutManager);
recyclerView_dAdapter = new RecyclerViewAdapter(listItem, this);
recyclerView.setAdapter(recyclerView_dAdapter);
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
if (gridLayoutManager.findLastCompletelyVisibleItemPosition() == listItem.size() - 1) {
Get_All_Users(listItem.get(listItem.size()-1).getId());
}
}
});
Get_All_Users(0);
}
public void Get_All_Users(int limit) {
CheckInternetConnection cic = new CheckInternetConnection(getApplicationContext());
Boolean Ch = cic.isConnectingToInternet();
if (!Ch) {
Toast.makeText(this, R.string.no_internet_connection, Toast.LENGTH_SHORT).show();
} else {
StringRequest stringRequest = new StringRequest(Request.Method.GET,
"Data Link" + limit
,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONArray jsonArray = new JSONArray(response);
JSONObject jsonResponse = jsonArray.getJSONObject(0);
JSONArray jsonArray_usersS = jsonResponse.getJSONArray("All_storys");
for (int i = 0; i < jsonArray_usersS.length(); i++) {
JSONObject responsS = jsonArray_usersS.getJSONObject(i);
int id = responsS.getInt("id");
String story = responsS.getString("story_name");
String img_link = responsS.getString("img_link");
listItem.add(new List_Item(id, story, img_link));
}
recyclerView_dAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue queue = Volley.newRequestQueue(this);
queue.add(stringRequest);
stringRequest.setShouldCache(false);
}
}
}
List Items.class
public class List_Item {
public int id;
public String story;
public String img_link;
public List_Item(int id, String story, String img_link) {
this.id = id;
this.story = story;
this.img_link = img_link;
}
public int getId() {
return id;
}
public String getStory() {
return story;
}
public String getImg_link() {
return img_link;
}
public void setId(int id) {
this.id = id;
}
}

Populate recycle adapter from controller class

I'm trying to populate a recycle adapter from a controller class, to split the logic in the app. But I can't seem to get it working.. Do to the request is running on another thread, the view is not updated before it is shown. What am I doing wrong ?
FragmentClass:
package lassebjoerklund.homecontrol.views.fragments;
import android.app.Fragment;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import org.json.JSONArray;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import lassebjoerklund.homecontrol.R;
import lassebjoerklund.homecontrol.adapters.FridgeFragmentOverViewAdapter;
import lassebjoerklund.homecontrol.controllers.FridgeController;
import lassebjoerklund.homecontrol.decorations.DividerItemDecoration;
import lassebjoerklund.homecontrol.model.Product;
import lassebjoerklund.homecontrol.utils.FragmentUtil;
/**
* Created by zigge on 29-Mar-16.
*/
public class FridgeFragmentOverView extends Fragment {
private final FridgeController fridgeController = new FridgeController();
private RecyclerView recyclerView;
private LinkedList<String> types;
private FridgeFragmentOverViewAdapter adapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_overview_layout, container, false);
recyclerView = (RecyclerView) v.findViewById(R.id.productOverviewRecycleView);
recyclerView.setHasFixedSize(true);
RecyclerView.ItemDecoration itemDecoration = new DividerItemDecoration(getActivity(), DividerItemDecoration.VERTICAL_LIST);
recyclerView.addItemDecoration(itemDecoration);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getContext());
recyclerView.setLayoutManager(layoutManager);
adapter = new FridgeFragmentOverViewAdapter(fridgeController.getProductsTypes());
recyclerView.setAdapter(adapter);
return v;
}
#Override
public void onResume() {
super.onResume();
fridgeController.refresh(getContext(), adapter);
}
}
Controller Class:
package lassebjoerklund.homecontrol.controllers;
import android.content.Context;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
import lassebjoerklund.homecontrol.adapters.FridgeFragmentOverViewAdapter;
import lassebjoerklund.homecontrol.interfaces.OnSucsess;
import lassebjoerklund.homecontrol.model.Product;
/**
* Created by zigge on 29-Mar-16.
*/
public class FridgeController implements OnSucsess {
private RequestQueue rQueue;
private ArrayList<Product> products;
private List<String> productsTypes;
public ArrayList<Product> getProducts() {
return products;
}
public List<String> getProductsTypes() {
return productsTypes;
}
public void refresh(Context context, final FridgeFragmentOverViewAdapter adapter) {
String fetchProducts = "http://87.52.28.25:900/index.php";
rQueue = Volley.newRequestQueue(context);
final JsonArrayRequest getProductsRequest = new JsonArrayRequest(fetchProducts, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
products = new ArrayList<>();
productsTypes = new ArrayList<>();
try {
for (int i = 0; i < response.length(); i++) {
JSONObject jsonObject = (JSONObject) response.get(i);
String barcode = jsonObject.getString("code");
String name = jsonObject.getString("name");
String ex_date = jsonObject.getString("ex_date");
String add_date = jsonObject.getString("add_date");
String type = jsonObject.getString("type");
Product product = new Product(barcode, name, ex_date, add_date, type);
products.add(product);
}
} catch (JSONException e) {
e.printStackTrace();
}
if (products.size() != 0) {
for (int i = 0; i < products.size(); i++) {
if (!productsTypes.contains(products.get(i).getType())) {
productsTypes.add(products.get(i).getType());
}
}
}
getProductsOnsucsess(adapter);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
rQueue.add(getProductsRequest);
}
#Override
public void getProductsOnsucsess(FridgeFragmentOverViewAdapter adapter) {
adapter.refreshAdapter(productsTypes);
}
}
Adapter:
package lassebjoerklund.homecontrol.adapters;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
import lassebjoerklund.homecontrol.R;
import lassebjoerklund.homecontrol.model.Product;
/**
* Created by zigge on 29-Mar-16.
*/
public class FridgeFragmentOverViewAdapter extends RecyclerView.Adapter {
private List<String> types;
public FridgeFragmentOverViewAdapter(List<String> types) {
this.types = types;
}
#Override
public int getItemCount() {
return 0;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.fragment_overview_card_layout, null);
return new ProductsGroupedHolder(v);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
}
public class ProductsGroupedHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView tvTypeOfProduct, tvCount, tvExpired;
public ProductsGroupedHolder(View itemView) {
super(itemView);
tvTypeOfProduct = (TextView) itemView.findViewById(R.id.tvTypeOfProduct);
tvCount = (TextView) itemView.findViewById(R.id.tvCount);
tvExpired = (TextView) itemView.findViewById(R.id.tvExpired);
}
#Override
public void onClick(View v) {
}
}
public void refreshAdapter(List<String> types) {
if(this.types != null) {
this.types.clear();
this.types = types;
notifyDataSetChanged();
}else {
this.types = types;
notifyDataSetChanged();
}
}
}

Try calling:
adapter.notifyDataSetChanged();
after updating it.
Edit 1:
Return actual size of adapter items in getItemCount() as #prathamkesarkar said.

Simple looks like you have set the getItemType() method return 0.
That method determines how much item your RecyclerView have.
#Override
public int getItemCount() {
return type.size();
}