Calculating Price * Quantity from Adapter to Total Price from Activity

Calculating Price * Quantity from Adapter to Total Price from Activity - java

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

Related

Nothing happens after I click item in recyclerview even after using interface

I have made an android application using java, and I have made a click listener interface but nothing seems to happen and I can't figure out what is wrong with my code. Please help.
Following is the code of my recyclerViewAdapter:
package com.example.ashwamedh.adapter;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.example.ashwamedh.R;
import com.example.ashwamedh.model.AdminConfirmation;
import com.example.ashwamedh.model.Attendance;
import com.example.ashwamedh.model.Confirmation;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.firestore.CollectionReference;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.QueryDocumentSnapshot;
import com.google.firebase.firestore.QuerySnapshot;
import java.util.List;
import java.util.Objects;
public class ManageAttendanceRecyclerViewAdapter extends RecyclerView.Adapter<ManageAttendanceRecyclerViewAdapter.ViewHolder> {
private List<Confirmation> practiceList;
private Context context;
private OnAttendanceClickListener onAttendanceClickListener;
private CollectionReference collectionReference = FirebaseFirestore.getInstance().collection("Users");
public ManageAttendanceRecyclerViewAdapter(List<Confirmation> practiceList, Context context, OnAttendanceClickListener onAttendanceClickListener) {
this.practiceList = practiceList;
this.context = context;
this.onAttendanceClickListener = onAttendanceClickListener;
}
#NonNull
#Override
public ManageAttendanceRecyclerViewAdapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context)
.inflate(R.layout.manage_attendance_row, parent, false);
return new ViewHolder(view, context);
}
#Override
public void onBindViewHolder(#NonNull ManageAttendanceRecyclerViewAdapter.ViewHolder holder, int position) {
Confirmation confirmation = practiceList.get(position);
holder.nameTextView.setText(confirmation.getUsername());
if (confirmation.getRemarkOrReason() == "") {
holder.remarkOrReasonTextView.setText("null");
}else {
holder.remarkOrReasonTextView.setText(confirmation.getRemarkOrReason());
}
if (Objects.equals(confirmation.getConfirmation(), "present")) {
holder.confirmation.setImageResource(R.drawable.ic_baseline_check_24);
} else if (Objects.equals(confirmation.getConfirmation(), "absent")){
holder.confirmation.setImageResource(R.drawable.ic_baseline_close_24);
}
}
#Override
public int getItemCount() {
return practiceList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView nameTextView;
private ImageView confirmation;
private TextView remarkOrReasonTextView;
OnAttendanceClickListener onAttendanceClickListener;
public ViewHolder(#NonNull View itemView, Context ctx) {
super(itemView);
this.onAttendanceClickListener = ManageAttendanceRecyclerViewAdapter.this.onAttendanceClickListener;
context = ctx;
nameTextView = itemView.findViewById(R.id.manage_attendance_name_textview);
confirmation = itemView.findViewById(R.id.manage_attendance_confirmation);
remarkOrReasonTextView = itemView.findViewById(R.id.manage_attendance_remark_reason_textview);
}
#Override
public void onClick(View view) {
int id = view.getId();
switch (id){
case R.id.manage_attendance_row:
Log.d("from recycler view", "onClick: " + "row clicked");
Confirmation confirmation = practiceList.get(getAdapterPosition());
String userId = confirmation.getUserId();
onAttendanceClickListener.OnAttendanceClick(userId);
}
}
}
}
Following is the code of OnAttendanceClickListener:
package com.example.ashwamedh.adapter;
public interface OnAttendanceClickListener {
void OnAttendanceClick(String userId);
}
Following is the code of the activity where the recycler view is used and the interface implemented:
package com.example.ashwamedh;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.cardview.widget.CardView;
import androidx.core.content.ContextCompat;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Intent;
import android.content.res.ColorStateList;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import com.example.ashwamedh.adapter.ManageAttendanceRecyclerViewAdapter;
import com.example.ashwamedh.adapter.OnAttendanceClickListener;
import com.example.ashwamedh.model.Confirmation;
import com.example.ashwamedh.util.UserApi;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.firebase.firestore.CollectionReference;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.QueryDocumentSnapshot;
import com.google.firebase.firestore.QuerySnapshot;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Objects;
public class ManagePracticeConfirmationActivity extends AppCompatActivity implements OnAttendanceClickListener {
private static final String TAG = "PRACTICE_CONFIRMATION";
private RecyclerView recyclerView;
private BottomNavigationView bottomNavigationView;
private CardView markAttendanceCardView;
private FloatingActionButton presentFab;
private FloatingActionButton absentFab;
private Button updateButton;
private TextView noPracticeTextView;
private ImageButton signOut;
private Boolean isAdmin;
private String attendance;
private ManageAttendanceRecyclerViewAdapter manageAttendanceRecyclerViewAdapter;
private String practiceDate;
private List<Confirmation> practiceList;
private FirebaseFirestore db = FirebaseFirestore.getInstance();
private CollectionReference collectionReference = db.collection("Confirmations");
private CollectionReference userCollection = db.collection("Users");
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_manage_practice_confirmation);
Objects.requireNonNull(getSupportActionBar()).hide();
practiceList = new ArrayList<>();
recyclerView = findViewById(R.id.manage_attendance_recycler_view);
bottomNavigationView = findViewById(R.id.bottomNavigationView);
markAttendanceCardView = findViewById(R.id.mark_attendance_cardView);
presentFab = findViewById(R.id.present_fab);
absentFab = findViewById(R.id.absent_fab);
updateButton = findViewById(R.id.update_attendance_button);
noPracticeTextView = findViewById(R.id.no_practice_textView);
signOut = findViewById(R.id.signOut_manage_attendance);
absentFab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(ManagePracticeConfirmationActivity.this, R.color.absent_button_color)));
presentFab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(ManagePracticeConfirmationActivity.this, R.color.present_button_color)));
bottomNavigationView.setSelectedItemId(R.id.manage_practice_confirmation_button);
markAttendanceCardView.setVisibility(View.INVISIBLE);
UserApi userApi = UserApi.getInstance();
isAdmin = Objects.equals(userApi.getUsername(), "ADMIN");
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
attendance = "";
Date today = Calendar.getInstance().getTime();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd/MM/yyyy");
practiceDate = simpleDateFormat.format(today);
Log.d(TAG, "onCreate: " + Calendar.DAY_OF_WEEK);
if (Calendar.getInstance().get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY
|| Calendar.getInstance().get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
recyclerView.setVisibility(View.INVISIBLE);
noPracticeTextView.setVisibility(View.VISIBLE);
} else {
recyclerView.setVisibility(View.VISIBLE);
noPracticeTextView.setVisibility(View.INVISIBLE);
}
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
if (item.getItemId() == R.id.home_button) {
Intent intent = new Intent(ManagePracticeConfirmationActivity.this, Dashboard.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
return true;
}
if (item.getItemId() == R.id.council_button) {
Intent intent = new Intent(ManagePracticeConfirmationActivity.this, CouncilActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
return true;
}
if (item.getItemId() == R.id.attendance_button) {
Intent intent = new Intent(ManagePracticeConfirmationActivity.this, BatchmateAttendance.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
return true;
}
if (item.getItemId() == R.id.manage_practice_confirmation_button) {
return true;
}
return false;
}
});
}
#Override
protected void onStart() {
super.onStart();
Date today = Calendar.getInstance().getTime();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd/MM/yyyy");
practiceDate = simpleDateFormat.format(today);
collectionReference.whereEqualTo("practiceDate", practiceDate)
.get()
.addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
#Override
public void onSuccess(QuerySnapshot queryDocumentSnapshots) {
if (!queryDocumentSnapshots.isEmpty()) {
for (QueryDocumentSnapshot snapshot : queryDocumentSnapshots) {
Confirmation confirmation = snapshot.toObject(Confirmation.class);
practiceList.add(confirmation);
}
manageAttendanceRecyclerViewAdapter = new ManageAttendanceRecyclerViewAdapter(practiceList,
ManagePracticeConfirmationActivity.this,
ManagePracticeConfirmationActivity.this);
recyclerView.setAdapter(manageAttendanceRecyclerViewAdapter);
manageAttendanceRecyclerViewAdapter.notifyDataSetChanged();
}
}
})
.addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
}
});
}
#Override
public void OnAttendanceClick(String userId) {
Log.d(TAG, "OnAttendanceClick: "+ isAdmin);
UserApi userApi = UserApi.getInstance();
isAdmin = Objects.equals(userApi.getUsername(), "ADMIN");
if (isAdmin) {
markAttendanceCardView.setVisibility(View.VISIBLE);
presentFab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
attendance = "present";
presentFab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(ManagePracticeConfirmationActivity.this, R.color.selected_button_color)));
absentFab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(ManagePracticeConfirmationActivity.this, R.color.absent_button_color)));
}
});
absentFab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
attendance = "absent";
absentFab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(ManagePracticeConfirmationActivity.this, R.color.selected_button_color)));
presentFab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(ManagePracticeConfirmationActivity.this, R.color.present_button_color)));
}
});
updateButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Confirmation confirmation = new Confirmation();
confirmation.setUserId(userId);
confirmation.setConfirmation(attendance);
confirmation.setPracticeDate(practiceDate);
if (Objects.equals(attendance, "present")) {
confirmation.setRemarkOrReason("PRESENT ON PRACTICE");
} else if (Objects.equals(attendance, "absent")){
confirmation.setRemarkOrReason("ABSENT ON PRACTICE");
}
SimpleDateFormat documentDateFormat = new SimpleDateFormat("dd_MM_yyyy");
String docDate = documentDateFormat.format(practiceDate);
String docAddress = userId+"_"+docDate;
collectionReference.document(docAddress)
.set(confirmation)
.addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void unused) {
Toast.makeText(ManagePracticeConfirmationActivity.this, "Attendance marked!", Toast.LENGTH_SHORT)
.show();
}
});
attendance = "";
absentFab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(ManagePracticeConfirmationActivity.this, R.color.absent_button_color)));
presentFab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(ManagePracticeConfirmationActivity.this, R.color.present_button_color)));
markAttendanceCardView.setVisibility(View.INVISIBLE);
manageAttendanceRecyclerViewAdapter.notifyDataSetChanged();
}
});
} else {
Toast.makeText(ManagePracticeConfirmationActivity.this, "Only admins can mark attendance!", Toast.LENGTH_SHORT)
.show();
}
}
}
Please help me I am clueless of where is the error

RecyclerView clicks doesn't work like that.
Firstly you should write click event in onBindViewHolder
holder.itemView.setOnClickListener(view -> onAttendanceClickListener.OnAttendanceClick(userId));
Put this code in your onBindViewHolder and you are good to go!
You will receive click events in Activity.

Getting wrong position on RecyclerView

I am trying to get the position of the item in a recycler view in order to pass it down to other activities, but after actually managing to get the item id, I found out that I'm getting a -1, therefore not getting a correct id there. What could be causing this?
The activity:
package com.gmproxy.pastilarma;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.lifecycle.ViewModelProvider;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.SearchView;
import android.widget.Toast;
import androidx.recyclerview.*;
import com.gmproxy.Adapters.PathologyListAdapter;
import com.gmproxy.Adapters.PathologyViewHolder;
import com.gmproxy.DAO.PathologyDAO;
import com.gmproxy.Entities.Pathology;
import com.gmproxy.Util.PathologyViewModel;
public class PathologiesSearchScreen extends AppCompatActivity {
private PathologyViewModel viewModel;
SearchView searchView;
RecyclerView recyclerView;
private PathologyDAO pathDao;
private Pathology pathology;
private PathologyViewHolder holder;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pathology_search_list);
searchView = findViewById(R.id.SearchView);
recyclerView = findViewById(R.id.recyclerview);
final PathologyListAdapter adapter = new PathologyListAdapter(new PathologyListAdapter.UserDiff());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
viewModel = new ViewModelProvider(this).get(PathologyViewModel.class);
viewModel.pathologies.observe(this, adapter::submitList);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
viewModel.setFilter(searchView.getQuery().toString());
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
long start;
start = System.currentTimeMillis();
if ((newText.length() > 3) && (System.currentTimeMillis() - start > 500)) {
viewModel.setFilter(searchView.getQuery().toString());
}
return false;
}
});
recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
#Override
public boolean onInterceptTouchEvent(#NonNull #org.jetbrains.annotations.NotNull RecyclerView rv, #NonNull #org.jetbrains.annotations.NotNull MotionEvent e) {
pathology = getSelectedPathology(findViewById(R.id.recyclerview));
Log.println(Log.INFO, "PathologyTest", pathology.toString());
final CharSequence[] options = {"Si", "No"};
AlertDialog.Builder builder = new AlertDialog.Builder(PathologiesSearchScreen.this);
builder.setTitle("¿Añadir la patología " + pathology.getPathologyName() + "?");
builder.setItems(options, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int item) {
if (options[item].equals("Si")) {
Toast.makeText(PathologiesSearchScreen.this, "Has añadido la patología " + pathology.getPathologyName() + ".", Toast.LENGTH_SHORT).show();
Intent mainAct = new Intent(PathologiesSearchScreen.this, UserAddScreen.class);
mainAct.putExtra("path", pathology);
} else if (options[item].equals("No")) {
dialog.dismiss();
}
}
});
builder.show();
return true;
}
#Override
public void onTouchEvent(#NonNull #org.jetbrains.annotations.NotNull RecyclerView rv, #NonNull #org.jetbrains.annotations.NotNull MotionEvent e) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
});
}
public Pathology getSelectedPathology(View v){
holder = new PathologyViewHolder(v);
long idlongo = recyclerView.getAdapter().getItemId(holder.getAdapterPosition());
Log.println(Log.INFO, "PathologyTest", String.valueOf(idlongo));
int id = (int) idlongo;
Pathology path = pathDao.findObjectbyId(id);
return path;
}
}
The view holder:
package com.gmproxy.Adapters;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
import android.widget.Toast;
import androidx.recyclerview.widget.RecyclerView;
import com.gmproxy.DAO.PathologyDAO;
import com.gmproxy.Entities.Pathology;
import com.gmproxy.pastilarma.PathologiesSearchScreen;
import com.gmproxy.pastilarma.R;
import java.nio.file.Path;
public class PathologyViewHolder extends RecyclerView.ViewHolder {
public final TextView objItemView;
public PathologyViewHolder(View itemView) {
super(itemView);
objItemView = itemView.findViewById(R.id.textView);
}
public void bind(String text) {
objItemView.setText(text);
}
static PathologyViewHolder create(ViewGroup parent) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.pathologies_item, parent, false);
return new PathologyViewHolder(view);
}
}
The list adapter:
package com.gmproxy.Adapters;
import android.content.DialogInterface;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.recyclerview.widget.DiffUtil;
import androidx.recyclerview.widget.ListAdapter;
import com.gmproxy.Entities.Pathology;
import com.gmproxy.pastilarma.PathologiesSearchScreen;
import com.gmproxy.pastilarma.UserAddScreen;
public class PathologyListAdapter extends ListAdapter<Pathology, PathologyViewHolder> {
public PathologyListAdapter(#NonNull DiffUtil.ItemCallback<Pathology> diffCallback) {
super(diffCallback);
}
#Override
public PathologyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return PathologyViewHolder.create(parent);
}
#Override
public void onBindViewHolder(PathologyViewHolder holder, int position) {
Pathology current = getItem(position);
holder.bind(current.getPathologyName());
}
public static class UserDiff extends DiffUtil.ItemCallback<Pathology> {
#Override
public boolean areItemsTheSame(#NonNull Pathology oldItem, #NonNull Pathology newItem) {
return oldItem == newItem;
}
#Override
public boolean areContentsTheSame(#NonNull Pathology oldItem, #NonNull Pathology newItem) {
return oldItem.getPathologyName().equals(newItem.getPathologyName());
}
}
}
The entity DAO:
package com.gmproxy.DAO;
import androidx.lifecycle.LiveData;
import androidx.room.*;
import com.gmproxy.Entities.Pathology;
import com.gmproxy.Entities.User;
import java.util.List;
#Dao
public interface PathologyDAO {
#Query("SELECT * FROM condiciones")
LiveData<List<Pathology>> getAllObjects();
//This will come in handy for getting all those pathologies, will need to get them on a for loop since I'm not completely sure
//that the query will handle int[]
#Query("SELECT id_condiciones FROM condiciones WHERE id_condiciones LIKE :id_condiciones")
int getPathologiesForUser(int id_condiciones);
#Query("SELECT nombreCondicion FROM condiciones WHERE nombreCondicion LIKE :pathologyName")
String getPathologiesForName(String pathologyName);
#Query("SELECT * FROM condiciones WHERE nombreCondicion LIKE :pathologyName")
Pathology getPathologiesCompleteForName(String pathologyName);
#Query("SELECT * FROM condiciones WHERE id_condiciones = :id")
Pathology findObjectbyId(int id);
#Query("SELECT * FROM condiciones WHERE nombreCondicion LIKE '%' || :filter || '%'")
LiveData<List<Pathology>> filterText(String filter);
#Insert(onConflict = OnConflictStrategy.REPLACE)
void insertAllObjects(List<Pathology> listObjects);
#Insert(onConflict = OnConflictStrategy.REPLACE)
void insertObject(Pathology object);
#Update
void updateObject(Pathology object);
#Delete
void delete(Pathology obj);
}
The entity repository:
package com.gmproxy.DAO;
import android.app.Application;
import android.os.AsyncTask;
import androidx.lifecycle.LiveData;
import com.gmproxy.Entities.Pathology;
import com.gmproxy.Entities.User;
import java.util.List;
import java.util.concurrent.ExecutionException;
public class PathologyRepository {
private PathologyDAO concerningDao;
private LiveData<List<Pathology>> pathologyList;
public PathologyRepository(Application application) {
DatabaseHelper db = DatabaseHelper.getDatabase(application);
concerningDao = db.pathologyDao();
pathologyList = concerningDao.getAllObjects();
}
public LiveData<List<Pathology>> getAllObjects() {
return concerningDao.getAllObjects();
}
void insertAllObjects(List<Pathology> objectsList) {
DatabaseHelper.databaseWriteExecutor.execute(() ->{
concerningDao.insertAllObjects(objectsList);
});
}
public void insertObject(Pathology obj){
DatabaseHelper.databaseWriteExecutor.execute(() ->{
concerningDao.insertObject(obj);
});
}
public void deleteObject(Pathology obj) {
concerningDao.delete(obj);
}
public LiveData<List<Pathology>> filter(String input){
try{
return new FilterNoteAsyncTask(concerningDao).execute(input).get();
} catch (ExecutionException | InterruptedException e) {
e.printStackTrace();
}
return null;
}
private static class FilterNoteAsyncTask extends AsyncTask<String, Void, LiveData<List<Pathology>>> {
private PathologyDAO pathologyDAO;
private FilterNoteAsyncTask(PathologyDAO pathologyDAO) {
this.pathologyDAO = pathologyDAO;
}
#Override
protected LiveData<List<Pathology>> doInBackground(String... strings) {
return pathologyDAO.filterText(strings[0]);
}
}
}

Move your PathologyListAdapter to global, and get adapter position using adapter object instead of getting adapter from recyclerview.
public Pathology getSelectedPathology(){
long idlongo = adapter.getAdapterPosition();
Log.println(Log.INFO, "PathologyTest", String.valueOf(idlongo));
int id = (int) idlongo;
Pathology path = pathDao.findObjectbyId(id);
return path;
}

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

Blank Screen Shows after search from database (Android)

When i tap search donor then it shows blank screen in listview i don't know why This is the response that i get back from server
This is my custom adapter code:
package com.example.kamran.ebloodbank;
import android.app.Activity;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.List;
/**
* Created by Kamran on 4/12/2017.
*/
public class DonorAdapter extends BaseAdapter {
private Activity activity;
private LayoutInflater inflater;
private List<DataSet> donorItems;
public DonorAdapter(Activity activity,List<DataSet> donorItems) {
this.activity = activity;
this.donorItems = donorItems;
}
#Override
public int getCount() {
return donorItems.size();
}
#Override
public Object getItem(int location) {
return donorItems.get(location);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.donor_search_list_theme, null);
TextView nameTextView = (TextView) convertView.findViewById(R.id.donor_name);
TextView areaTextView = (TextView) convertView.findViewById(R.id.donor_area);
DataSet d = donorItems.get(position);
nameTextView.setText(d.getName());
areaTextView.setText(d.getArea());
return convertView;
}
}
This is my model code:
package com.example.kamran.ebloodbank;
import android.widget.ArrayAdapter;
import java.util.ArrayList;
/**
* Created by Kamran on 4/12/2017.
*/
public class DataSet {
private String name;
private int area;
public void setArea(int area) {
this.area = area;
}
public void setName(String name) {
this.name = name;
}
public int getArea() {
return area;
}
public String getName() {
return name;
}
}
This is my first activity code:
package com.example.kamran.ebloodbank;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Spinner;
import com.android.volley.AuthFailureError;
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.example.kamran.ebloodbank.data.BloodContract.BloodEntry;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class FindDonor extends AppCompatActivity {
Spinner bloodgroup;
Spinner area;
String findDonorUrl = "https://wwwkamranalitk.000webhostapp.com/findDonor.php";
int mBlood = BloodEntry.BLOOD_GROUP_A_POS;
int mArea = BloodEntry.DONOR_AREA_MALIR;
Button searchButton;
RequestQueue requestQueue;
StringRequest request;
JSONObject jsonObject;
JSONArray result;
private List<DataSet> donorList = new ArrayList<DataSet>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_find_donor);
bloodgroup = (Spinner) findViewById(R.id.bloodspinnerfinddonor);
area = (Spinner) findViewById(R.id.areaSpinner);
searchButton = (Button) findViewById(R.id.searchDonor);
setupSpinnerBlood();
setupSpinnerArea();
requestQueue = Volley.newRequestQueue(getApplicationContext());
searchButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
request = new StringRequest(Request.Method.POST, findDonorUrl, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
jsonObject = new JSONObject(response);
result = jsonObject.getJSONArray("result");
JSONObject donorData = result.getJSONObject(0);
DataSet donorSet = new DataSet();
donorSet.setName(donorData.getString("name"));
donorSet.setArea(donorData.getInt("area"));
donorList.add(donorSet);
Intent intent = new Intent(FindDonor.this, DonorSearchList.class);
startActivity(intent);
finish();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}){
#Override
protected Map<String, String> getParams() throws AuthFailureError {
HashMap<String,String> parameters = new HashMap<String, String>();
parameters.put("bloodgroup", String.valueOf(mBlood));
parameters.put("area", String.valueOf(mArea));
return parameters;
}
};
requestQueue.add(request);
}
});
}
private void setupSpinnerBlood() {
ArrayAdapter bloodGroupSpinnerAdapter = ArrayAdapter.createFromResource(this, R.array.blood_group, android.R.layout.simple_spinner_item);
bloodGroupSpinnerAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
bloodgroup.setAdapter(bloodGroupSpinnerAdapter);
bloodgroup.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String selection = (String) parent.getItemAtPosition(position);
if (!TextUtils.isEmpty(selection)) {
if (selection.equals(getString(R.string.blood_apos))) {
mBlood = BloodEntry.BLOOD_GROUP_A_POS;
} else if (selection.equals((getString(R.string.blood_bpos)))) {
mBlood = BloodEntry.BLOOD_GROUP_B_POS;
} else if (selection.equals(getString(R.string.blood_opos))) {
mBlood = BloodEntry.BLOOD_GROUP_O_POS;
} else if (selection.equals((getString(R.string.blood_oneg)))) {
mBlood = BloodEntry.BLOOD_GROUP_O_NEG;
}
}
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
mBlood = BloodEntry.BLOOD_GROUP_A_POS;
}
});
}
private void setupSpinnerArea() {
ArrayAdapter areaSpinnerAdapter = ArrayAdapter.createFromResource(this, R.array.area, android.R.layout.simple_spinner_item);
areaSpinnerAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
area.setAdapter(areaSpinnerAdapter);
area.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String selection = (String) parent.getItemAtPosition(position);
if (!TextUtils.isEmpty(selection)) {
if (selection.equals(getString(R.string.donor_area_malir))) {
mArea = BloodEntry.DONOR_AREA_MALIR;
} else if (selection.equals(getString(R.string.donor_area_defence))) {
mArea = BloodEntry.DONOR_AREA_DEFENCE;
} else if (selection.equals(getString(R.string.donor_area_korangi))) {
mArea = BloodEntry.DONOR_AREA_KORANGI;
} else if (selection.equals(getString(R.string.donor_area_johar))) {
mArea = BloodEntry.DONOR_AREA_JOHAR;
}
}
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
mArea = BloodEntry.DONOR_AREA_MALIR;
}
});
}
}
and This is the code in which data will be shown:
package com.example.kamran.ebloodbank;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class DonorSearchList extends AppCompatActivity {
private String mArea;
private List<DataSet> donorList = new ArrayList<DataSet>();
private ListView listView;
private DonorAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_donor_search_list);
listView = (ListView) findViewById(R.id.donorListView);
adapter = new DonorAdapter(this, donorList);
listView.setAdapter(adapter);
}
}

You need to transfer data from the search to list activity.
Try something like this:
public class bridge {
public static List<DataSet> donorList = new ArrayList<DataSet>();
}
Then, in the class FindDonor:
donorSet.setName(donorData.getString("name"));
donorSet.setArea(donorData.getInt("area"));
donorList.add(donorSet);
//here put this line
bridge.donarList = donarList;
//rest code
Intent intent = new Intent(FindDonor.this, DonorSearchList.class);
Then, in the DonorSearchList class:
adapter = new DonorAdapter(this, bridge.donorList);

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;
}
}

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