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 move from a fragment to a new activity when i clicked an item of recyclerview?

I am using recyclerview in fragment dynamically, now i want to open new activity on click of items with the same object / item.
AllCoursesFeagment.java
package com.example.learningapp.ui.NavigationDrawer.AllCourses;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.example.learningapp.Adapters.AllCoursesMyAdapter;
import com.example.learningapp.Interface.APIinterface;
import com.example.learningapp.Models.CourseListModel;
import com.example.learningapp.R;
import com.example.learningapp.Responses.CourseListResponse;
import com.example.learningapp.RetrofitAPIs.RetrofitAPI;
import com.example.learningapp.utility.ConstantData;
import java.util.List;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
public class AllCoursesFragment extends Fragment {
private RecyclerView recyclerView;
private List<CourseListModel> courseListModelList;
public AllCoursesFragment() {
// Required empty public constructor
}
// TODO: Rename and change types and number of parameters
public static AllCoursesFragment newInstance() {
return new AllCoursesFragment();
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_all_courses,null);
recyclerView = view.findViewById(R.id.allCourseList_RV);
APIinterface apIinterface = RetrofitAPI.getClient().create(APIinterface.class);
Call<CourseListResponse> call = apIinterface.getAllCourses(ConstantData.AppKey);
call.enqueue(new Callback<CourseListResponse>() {
#Override
public void onResponse(Call<CourseListResponse> call, Response<CourseListResponse> response){
if (response.isSuccessful()){
courseListModelList = response.body().getCourseList();
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setAdapter(new AllCoursesMyAdapter(getActivity(),courseListModelList));
}
}
#Override
public void onFailure(Call<CourseListResponse> call, Throwable t) {
Toast.makeText(getActivity(),"Something went wrong",Toast.LENGTH_LONG).show();
}
});
return view;
}
}
AllCoursesMyAdapter.java
This is my adapter class.
package com.example.learningapp.Adapters;
import android.app.Activity;
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.learningapp.Activities.CheckoutActivity;
import com.example.learningapp.Models.CourseListModel;
import com.example.learningapp.R;
import java.util.List;
public class AllCoursesMyAdapter extends RecyclerView.Adapter<AllCoursesMyAdapter.RecyclerVH> {
Context context;
List<CourseListModel> courseListModelList;
public AllCoursesMyAdapter(Context context, List<CourseListModel> courseListModelList) {
this.context = context;
this.courseListModelList = courseListModelList;
}
#NonNull
#Override
public RecyclerVH onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.single_row_design_allcourses,parent,false);
return new RecyclerVH(view);
}
#Override
public void onBindViewHolder(#NonNull RecyclerVH holder, int position) {
final CourseListModel courseListModel = courseListModelList.get(position);
holder.courseTitle.setText(courseListModel.getCourseName());
holder.courseDesc.setText(courseListModel.getCourseDescription());
holder.buyBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
moveToNewActivity();
//Toast.makeText(context,"Item Clicked"+position,Toast.LENGTH_SHORT).show();
Intent intent = new Intent(context, CheckoutActivity.class);
intent.putExtra("coursetitle",courseListModel.getCourseName());
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
});
}
private void moveToNewActivity () {
Activity activity = new Activity();
Intent i = new Intent(activity, CheckoutActivity.class);
context.startActivity(i);
((Activity) context).overridePendingTransition(0, 0);
}
#Override
public int getItemCount() {
return courseListModelList.size();
}
public class RecyclerVH extends RecyclerView.ViewHolder {
TextView courseTitle,courseDesc;
Button buyBtn;
public RecyclerVH(#NonNull View itemView) {
super(itemView);
courseTitle = itemView.findViewById(R.id.course_title);
courseDesc = itemView.findViewById(R.id.course_desc);
buyBtn = itemView.findViewById(R.id.btn_buycourse);
}
}
}
I'm gettng crashed when i clicked item
holder.buyBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
moveToNewActivity();
//Toast.makeText(context,"Item Clicked"+position,Toast.LENGTH_SHORT).show();
Intent intent = new Intent(context, CheckoutActivity.class);
intent.putExtra("coursetitle",courseListModel.getCourseName());
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
});
Here i am using a stored list of objects and now i want to move to the new activity when i clicked on an item with given position, but i am not able to do that.

private void moveToNewActivity () {
Activity activity = new Activity(); //this is wrong, delete this
...
}
you can't and shouldn't create an instance of an activity like this, it's something the OS has to schedule and handle for you.
you already seem to have context defined somewhere, so that means:
private void moveToNewActivity () {
Intent i = new Intent(context, CheckoutActivity.class);
context.startActivity(i);
...
}
so that means:
#Override
public void onClick(View v) {
moveToNewActivity();
}

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 :(

How to implement custom listview adapter in tabbed activity?

I am trying to implement the custom list view in tabbed activity for youtube video playing app. I could not able to call custom listview adapter in fragment java class. I have tried to pass getActivity() to custom adapter but the app crashes. If any one know the solution please help me.
The java class are as follows:
HomeFragment.java
package layout;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
import in.testapp.app1.R;
public class HomeFragment extends Fragment {
static class Adapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList();
private final List<String> mFragmentTitleList = new ArrayList();
public Adapter(FragmentManager manager) {
super(manager);
}
public Fragment getItem(int position) {
return (Fragment) this.mFragmentList.get(position);
}
public int getCount() {
return this.mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
this.mFragmentList.add(fragment);
this.mFragmentTitleList.add(title);
}
public CharSequence getPageTitle(int position) {
return (CharSequence) this.mFragmentTitleList.get(position);
}
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home, container, false);
ViewPager viewPager = (ViewPager) view.findViewById(R.id.viewpager);
setupViewPager(viewPager);
((TabLayout) view.findViewById(R.id.tablayout)).setupWithViewPager(viewPager);
return view;
}
private void setupViewPager(ViewPager viewPager) {
Adapter adapter = new Adapter(getChildFragmentManager());
adapter.addFragment(new YouTubeFragment(), "Tab 1");
adapter.addFragment(new SecondFragment(), "Tab 2");
viewPager.setAdapter(adapter);
}
}
YouTubeFragment.java
package layout;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings.PluginState;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;
import com.android.volley.DefaultRetryPolicy;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.RetryPolicy;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import in.testapp.app1.AppUtils;
import in.testapp.app1.ChannelActivity;
import in.testapp.app1.CustomListAdapter;
import in.testapp.app1.R;
import in.testapp.app1.VideoDetails;
public class YouTubeFragment extends Fragment {
String TAG="MainActivity2";
ListView lvVideo;
ArrayList<VideoDetails> videoDetailsArrayList;
CustomListAdapter customListAdapter;
//{youtube_api_key} is replaced by actual key
String URL="https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=UC5Eg6bkwsdCd-ZlcB3nt1dg&maxResults=25&key={youtube_api_key}";
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_you_tube, container, false);
lvVideo=(ListView)view.findViewById(R.id.videoList);
videoDetailsArrayList=new ArrayList<>();
//App crashes here in the beolw line
customListAdapter=new CustomListAdapter(getActivity(),videoDetailsArrayList);
//App crashes here in the above line
showVideo();
return view;
}
private void showVideo() {
RequestQueue requestQueue= Volley.newRequestQueue(getContext());
StringRequest stringRequest=new StringRequest(Request.Method.GET, URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONObject jsonObject=new JSONObject(response);
JSONArray jsonArray=jsonObject.getJSONArray("items");
for(int i=1;i<jsonArray.length();i++){
JSONObject jsonObject1 = jsonArray.getJSONObject(i);
JSONObject jsonVideoId=jsonObject1.getJSONObject("id");
JSONObject jsonsnippet= jsonObject1.getJSONObject("snippet");
JSONObject jsonObjectdefault = jsonsnippet.getJSONObject("thumbnails").getJSONObject("medium");
VideoDetails videoDetails=new VideoDetails();
String videoid=jsonVideoId.getString("videoId");
Log.e(TAG," New Video Id" +videoid);
videoDetails.setURL(jsonObjectdefault.getString("url"));
videoDetails.setVideoName(jsonsnippet.getString("title"));
videoDetails.setVideoDesc(jsonsnippet.getString("description"));
videoDetails.setVideoId(videoid);
videoDetailsArrayList.add(videoDetails);
}
lvVideo.setAdapter(customListAdapter);
customListAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
int socketTimeout = 30000;
RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
stringRequest.setRetryPolicy(policy);
requestQueue.add(stringRequest);
}
}
CustomListAdapter.java
package in.testapp.app1;
import android.app.Activity;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.NetworkImageView;
import java.util.ArrayList;
public class CustomListAdapter extends BaseAdapter {
Activity activity;
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
private LayoutInflater inflater;
ArrayList<VideoDetails> singletons;
public CustomListAdapter(Activity activity, ArrayList<VideoDetails> singletons) {
this.activity = activity;
this.singletons = singletons;
}
public int getCount() {
return this.singletons.size();
}
public Object getItem(int i) {
return this.singletons.get(i);
}
public long getItemId(int i) {
return (long) i;
}
public View getView(int i, View convertView, ViewGroup viewGroup) {
if (this.inflater == null) {
this.inflater = (LayoutInflater) this.activity.getLayoutInflater();
// getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
if (convertView == null) {
convertView = this.inflater.inflate(R.layout.videolist, null);
}
if (this.imageLoader == null) {
this.imageLoader = AppController.getInstance().getImageLoader();
}
NetworkImageView networkImageView = (NetworkImageView) convertView.findViewById(R.id.video_image);
final TextView imgtitle = (TextView) convertView.findViewById(R.id.video_title);
final TextView imgdesc = (TextView) convertView.findViewById(R.id.video_descriptio);
final TextView tvURL=(TextView)convertView.findViewById(R.id.tv_url);
final TextView tvVideoID=(TextView)convertView.findViewById(R.id.tv_videoId);
((LinearLayout) convertView.findViewById(R.id.asser)).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent=new Intent(view.getContext(), VideoActivity.class);
intent.putExtra("videoId",tvVideoID.getText().toString());
view.getContext().startActivity(intent);
}
});
VideoDetails singleton = (VideoDetails) this.singletons.get(i);
networkImageView.setImageUrl(singleton.getURL(), this.imageLoader);
tvVideoID.setText(singleton.getVideoId());
imgtitle.setText(singleton.getVideoName());
imgdesc.setText(singleton.getVideoDesc());
return convertView;
}
}
VideoDeatils.java
package in.testapp.app1;
public class VideoDetails {
String VideoName;
String VideoDesc;
String URL;
String VideoId;
public void setVideoName(String VideoName){
this.VideoName=VideoName;
}
public String getVideoName(){
return VideoName;
}
public void setVideoDesc(String VideoDesc){
this.VideoDesc=VideoDesc;
}
public String getVideoDesc(){
return VideoDesc;
}
public void setURL(String URL){
this.URL=URL;
}
public String getURL(){
return URL;
}
public void setVideoId(String VideoId){
this.VideoId=VideoId;
}
public String getVideoId(){
return VideoId;
}
}

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);