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Application crash during Item click of recyclerView [duplicate]

This question already has answers here:
Unfortunately MyApp has stopped. How can I solve this?
(23 answers)
Closed last year.
My Application is crashed when I click on ItemView of RecyclerView, There is no error showing in code.
The data are load in toast but not pass to the other class or what don't know, but when I click any Item the appliaction is crash..
This is my Main RecyclerView Class
import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.Toast;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
public class Admin extends AppCompatActivity {
Button addUser;
RecyclerView mainUserRecyclerView;
UserAdapter adapter;
FirebaseDatabase database;
ArrayList<UserInfo> userInfoArrayList = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_admin);
mainUserRecyclerView = findViewById(R.id.mainUserRecyclerView);
mainUserRecyclerView.setLayoutManager(new LinearLayoutManager(this));
addUser = findViewById(R.id.addUserBtn);
database= FirebaseDatabase.getInstance();
DatabaseReference reference = database.getReference().child("userInfo");
reference.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
for(DataSnapshot dataSnapshot : snapshot.getChildren()){
UserInfo userInfo = dataSnapshot.getValue(UserInfo.class);
userInfoArrayList.add(userInfo);
}
adapter.notifyDataSetChanged();
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
Toast.makeText(Admin.this,"Failed to get data",Toast.LENGTH_SHORT).show();
}
});
adapter = new UserAdapter(Admin.this,userInfoArrayList);
mainUserRecyclerView.setAdapter(adapter);
}
public void setAddUser(View view){
Intent intent = new Intent(this,user_detail.class);
startActivity(intent);
}
}
This is my Adapter Class
package com.example.rent;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
public class UserAdapter extends RecyclerView.Adapter<UserAdapter.viewHolder> {
Context admin;
ArrayList<UserInfo> userInfoArrayList;
public UserAdapter(Admin admin, ArrayList<UserInfo> userInfoArrayList) {
this.admin = admin;
this.userInfoArrayList = userInfoArrayList;
}
#NonNull
#Override
public viewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(admin).inflate(R.layout.user_list_item,parent,false);
return new viewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull UserAdapter.viewHolder holder, int position) {
UserInfo userInfo = userInfoArrayList.get(position);
holder.user_name.setText(userInfo.getShopName());
holder.itemView.setOnClickListener(v -> {
Intent intent = new Intent(admin,Display_User.class);
//Toast.makeText(admin, ""+userInfo.getOneMonthRent(), Toast.LENGTH_SHORT).show();
intent.putExtra("Name",userInfo.getShopName());
intent.putExtra("Rent",userInfo.getOneMonthRent());
intent.putExtra("Complex",userInfo.getComplexName());
intent.putExtra("PaidRent",userInfo.getPaidAmount());
intent.putExtra("DMonth",userInfo.getDefaultMonth());
intent.putExtra("PendingRent",userInfo.getPendingAmount());
admin.startActivity(intent);
});
}
#Override
public int getItemCount() {
return userInfoArrayList.size();
}
public static class viewHolder extends RecyclerView.ViewHolder {
TextView user_name;
public viewHolder(#NonNull View itemView) {
super(itemView);
user_name = itemView.findViewById(R.id.tvUserName);
}
}
}
And The display User class where I have to fetch the data
package com.example.rent;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
public class Display_User extends AppCompatActivity {
TextView tvName,tvRent,tvComplex,tvPaidRent,tvDefaultMonth,tvPendingRent;
String Sname, rent, complex, paidRent, defaultMonth, pendingRent;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.display_user);
Sname = getIntent().getStringExtra("Name");
rent = getIntent().getStringExtra("Rent");
complex = getIntent().getStringExtra("Complex");
paidRent = getIntent().getStringExtra("PaidRent");
defaultMonth = getIntent().getStringExtra("DMonth");
pendingRent = getIntent().getStringExtra("Pending");
tvName = findViewById(R.id.tvName);
tvName.setText(Sname);
tvRent = findViewById(R.id.tvRent);
tvRent.setText(rent);
tvComplex = findViewById(R.id.tvComplex);
tvComplex.setText(complex);
tvPaidRent = findViewById(R.id.tvPaidRent);
tvPaidRent.setText(paidRent);
tvDefaultMonth = findViewById(R.id.tvDefault);
tvDefaultMonth.setText(defaultMonth);
tvPendingRent = findViewById(R.id.tvPending);
tvPendingRent.setText(pendingRent);
}
}

Have you declared the Activity on the manifest file? And the intent ?

In GridView after filtering the list, the index changes and the context of item is wrong

I am having a GridList View in which I am passing data from firebase. When I click on the items it works fine without filtering but when I filter it with searchView then it does not update the index of the list and then provides a different item's context.
I do not know how to update the item while filtering.
Homepage.Activity
package com.project.quizapp;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.cardview.widget.CardView;
import android.app.SearchManager;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.GridView;
import android.widget.ListAdapter;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import java.util.ArrayList;
import java.util.List;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ListAdapter;
import android.widget.SearchView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import static com.project.quizapp.LogIn.catList;
import static com.project.quizapp.LogIn.selected_cat_index_app;
import com.google.firebase.firestore.DocumentSnapshot;
import com.google.firebase.firestore.FirebaseFirestore;
import com.project.quizapp.CatGridAdapter;
public class HomePage extends AppCompatActivity {
CatGridAdapter adapter;
private GridView catGrid;
private FirebaseFirestore firebasefirestore;
public static List<CategoryModelClass> resultData;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page);
//Binding view and adding toolbar
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Subjects");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(HomePage.this, dashActivity.class));
}
});
//Adapter to set all the views
catGrid = findViewById(R.id.catGridview);
adapter = new CatGridAdapter(catList);
catGrid.setAdapter(adapter);
}
//Filtering all tthe views
#Override
public boolean onCreateOptionsMenu(Menu menu) {
//Inflating all the views and filtering
getMenuInflater().inflate(R.menu.search, menu);
MenuItem menuitem = menu.findItem(R.id.searchMenu);
SearchView searchview = (SearchView) menuitem.getActionView();
searchview.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
//Calling filters on the search attempt
//adapter.getFilter().filter(newText);
resultData = new ArrayList<>();
for(CategoryModelClass categoryModelClass:catList){
if(categoryModelClass.getName().toLowerCase().contains(newText.toLowerCase())){
resultData.add(categoryModelClass);
}
adapter = new CatGridAdapter(resultData);
catGrid.setAdapter(adapter);
}
return true;
}
});
return true;
}
//Adding search icon to the toolbar
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
if(id == R.id.searchMenu){
return true;
}
return super.onOptionsItemSelected(item);
}
}
CatGridAdapter.java
package com.project.quizapp;
import android.content.Intent;
import android.graphics.Color;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
import android.widget.Toast;
import org.w3c.dom.Text;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import static com.project.quizapp.LogIn.selected_cat_index_app;
import static java.security.AccessController.getContext;
//Creating the adapter wih the default BaseAdapter
//Also implementing
public class CatGridAdapter extends BaseAdapter {
//List of all the class variables
private List<CategoryModelClass> catList;
//Initializing the list wih constructor
public CatGridAdapter(List<CategoryModelClass> catList) {
this.catList = catList;
}
#Override
public int getCount() {
return catList.size();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
if(convertView == null){
//Adding all the views as we get the data from firebase
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.cat_item_layout,parent,false);
}
else{
view = convertView;
}
view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//selected_cat_index_app = position;
// Toast.makeText(parent.getChildAt(position), catList.get(position).getName()+" "+String.valueOf(catList.indexOf(position)), Toast.LENGTH_SHORT).show();
Intent intent = new Intent(parent.getContext(), SetsActivity.class);
parent.getContext().startActivity(intent);
}
});
((TextView) view.findViewById(R.id.catName)).setText(catList.get(position).getName());
Random rnd = new Random();
int color = Color.argb(255,rnd.nextInt(255),rnd.nextInt(255),rnd.nextInt(255));
view.setBackgroundColor(color);
return view;
}
}
CategoryModelClass.java
package com.project.quizapp;
//Model class to fetch the quiz subjects from the Cloud Firestone
public class CategoryModelClass {
//private variable for ID and the name of
private String id;
private String name;
//constructor
public CategoryModelClass(String id, String name) {
this.id = id;
this.name = name;
}
//methods
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}

Either implement a Filterable interface in the adapter or update your onQueryTextChange implementation.
Whenever you are typing, every time you are creating a new adapter with filtered data.
try this.. create new method in adapter
public void updateData(List<CategoryModelClass> catList){
this.catList = catList;
notifyDataSetChanged();
}
and call from onQueryTextChange
#Override
public boolean onQueryTextChange(String newText) {
//adapter.getFilter().filter(newText);
resultData = new ArrayList<>();
for (CategoryModelClass categoryModelClass : catList) {
if (categoryModelClass.getName().toLowerCase().contains(newText.toLowerCase())) {
resultData.add(categoryModelClass);
}
adapter.updateData(resultData);
}
return true;
}

No setter/field for url found on class com.example.scheduletask.model.Task can't retrieve data from firebase database to detail activity

im trying to retrieve data from firebase to detail activity. On the listview, it show perfectly. But when i click, the detail activity opened but still empty. All it says "W/ClassMapper: No setter/field for url found on class com.example.scheduletask.model.Task". I thought the setter on model task wasn't used, but i don't know... im sorry, i don't understand, i don't know what i missed:( any help is appreciated, thank youuu
TaskActivity.java
package com.example.scheduletask;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.example.scheduletask.adapter.MatkulAdapter;
import com.example.scheduletask.adapter.TaskAdapter;
import com.example.scheduletask.adapter.TaskDetailAdapter;
import com.example.scheduletask.database.FirebaseTaskHelper;
import com.example.scheduletask.model.Matkul;
import com.example.scheduletask.model.Task;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
import java.util.Iterator;
public class TaskActivity extends AppCompatActivity {
DatabaseReference databaseReference;
ListView listViewTask;
FloatingActionButton fabAddTask;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_task);
databaseReference = FirebaseDatabase.getInstance().getReference("Task");
listViewTask = findViewById(R.id.tasklist);
showData();
fabAddTask = findViewById(R.id.fab_addtask);
fabAddTask.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(TaskActivity.this, CreateTaskActivity.class);
startActivity(intent);
}
});
listViewTask.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String subjectTask = ((TextView)view.findViewById(R.id.txt_subjectlisttask)).getTag().toString();
Intent taskDetail = new Intent(TaskActivity.this, TaskDetailActivity.class);
taskDetail.putExtra("subjectTask", subjectTask);
startActivity(taskDetail);
}
});
}
private void showData() {
final ArrayList<String> subjectTask = new ArrayList<>();
final ArrayList<String> taskDueDate = new ArrayList<>();
final ArrayList<String> taskDescription = new ArrayList<>();
final ArrayList<String> imageURL = new ArrayList<>();
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
Iterable<DataSnapshot> snapshotIterable = dataSnapshot.getChildren();
Iterator<DataSnapshot> iterator = snapshotIterable.iterator();
while (iterator.hasNext()){
Task value = iterator.next().getValue(Task.class);
assert value != null;
subjectTask.add(value.getSubjectTask());
taskDescription.add(value.getTaskDescription());
taskDueDate.add(value.getTaskDueDate());
imageURL.add(value.getImageURL());
((TaskAdapter)listViewTask.getAdapter()).notifyDataSetChanged();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
listViewTask.setAdapter(new TaskAdapter(subjectTask, taskDescription, taskDueDate, imageURL, this));
}
#Override
protected void onResume() {
super.onResume();
showData();
}
}
Task.java (this is the model)
package com.example.scheduletask.model;
public class Task {
private String taskDueDate;
public String getTaskDueDate() {
return taskDueDate;
}
public void setTaskDueDate(String taskDueDate) {
this.taskDueDate = taskDueDate;
}
private String subjectTask;
public String getTaskDescription() {
return taskDescription;
}
public void setTaskDescription(String taskDescription) {
this.taskDescription = taskDescription;
}
public String getImageURL() {
return imageURL;
}
public void setImageURL(String imageURL) {
this.imageURL = imageURL;
}
private String taskDescription;
private String imageURL;
public String getSubjectTask() {
return subjectTask;
}
public void setSubjectTask(String subjectTask) {
this.subjectTask = subjectTask;
}
}
TaskDetailActivity.java
package com.example.scheduletask;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.example.scheduletask.model.Task;
import com.github.barteksc.pdfviewer.PDFView;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.squareup.picasso.Picasso;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Map;
public class TaskDetailActivity extends AppCompatActivity {
EditText edtSubject, edtDueDate, edtDescription;
ImageView filePhoto;
ProgressBar progressBarDetail;
Button btnEdit, btnDelete;
DatabaseReference databaseReference;
private String photoURL, subjectTask;
Button btnViewPDF;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_task_detail);
databaseReference = FirebaseDatabase.getInstance().getReference("Task");
subjectTask = getIntent().getExtras().getString("subjectTask");
progressBarDetail = findViewById(R.id.progressbardetail);
progressBarDetail.setVisibility(View.INVISIBLE);
readData();
findAllViewsID();
}
private void readData() {
progressBarDetail.setVisibility(View.VISIBLE);
Query findQuery = databaseReference.orderByKey().equalTo(subjectTask);
findQuery.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot getSnapshot : dataSnapshot.getChildren()){
edtSubject.setText(getSnapshot.child("subjectTask").getValue().toString());
edtDescription.setText(getSnapshot.child("taskDescription").getValue().toString());
edtDueDate.setText(getSnapshot.child("taskDueDate").getValue().toString());
photoURL = getSnapshot.child("imageURL").getValue().toString();
Picasso.get().load(photoURL).fit().into(filePhoto);
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
progressBarDetail.setVisibility(View.INVISIBLE);
}
});
progressBarDetail.setVisibility(View.INVISIBLE);
}
private void findAllViewsID() {
edtSubject = findViewById(R.id.edt_updatetasksubject);
edtDescription = findViewById(R.id.edt_updatetaskdescription);
edtDueDate = findViewById(R.id.edt_updateduedatetime);
filePhoto = findViewById(R.id.iv_taskphotoinput);
btnViewPDF = findViewById(R.id.btn_viewpdf);
btnDelete = findViewById(R.id.btn_deletetask);
btnEdit = findViewById(R.id.btn_edittask);
}
}
TaskAdapter.java
package com.example.scheduletask.adapter;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import com.example.scheduletask.R;
import com.example.scheduletask.TaskActivity;
import com.example.scheduletask.TaskDetailActivity;
import com.example.scheduletask.model.Task;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
public class TaskAdapter extends BaseAdapter {
private ArrayList<String> subjectTask;
private ArrayList<String> taskDescription;
private ArrayList<String> taskDueDate;
private ArrayList<String> imageURL;
private AppCompatActivity activity;
public TaskAdapter(ArrayList<String> subjectTask, ArrayList<String> taskDescription, ArrayList<String> taskDueDate, ArrayList<String> imageURL, AppCompatActivity activity) {
this.subjectTask = subjectTask;
this.taskDescription = taskDescription;
this.taskDueDate = taskDueDate;
this.imageURL = imageURL;
this.activity = activity;
}
Context ctx;
ArrayList<Task> tasks;
#Override
public int getCount() {
return subjectTask.size();
}
#Override
public Object getItem(int position) {
return subjectTask.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
public TaskAdapter(#NonNull Context ctx, ArrayList<Task> tasks) {
this.ctx = ctx;
this.tasks = tasks;
}
public View getView(int position, View view, ViewGroup parent) {
view = LayoutInflater.from(activity.getApplicationContext())
.inflate(R.layout.list_task, parent, false);
view.findViewById(R.id.txt_subjectlisttask).setTag(String.valueOf(subjectTask.get(position)));
((TextView)view.findViewById(R.id.txt_subjectlisttask)).setText(String.valueOf(subjectTask.get(position)));
((TextView)view.findViewById(R.id.txt_duedatetasklist)).setText(String.valueOf(taskDueDate.get(position)));
return view; }
}
Here is the logcat when i click the task listview
And this is my database

How to Insert A Search View To Expandable RecyclerView?

This is anExpandableRecyclerViewer Code.
I want to add a Search View to filter songs and singers both when the user types a name of a song or singer. I tried using adding search view to recyclerview and expandablelistview but they didn't work. Can someone please give me a way to solve my problem?
My Main Activity
package com.example.expandableview;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.annotation.SuppressLint;
import android.app.SearchManager;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.SearchView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private SearchView search;
private SongAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
ArrayList<Singer>singers = new ArrayList<>();
ArrayList<Song> shakirasong = new ArrayList<>();
shakirasong.add(new Song("Hips Don't Lie"));
shakirasong.add(new Song("Chantaje"));
shakirasong.add(new Song("Locca"));
shakirasong.add(new Song("Whenever Whenever"));
shakirasong.add(new Song("Me Gusta"));
Singer shakira = new Singer("Shakira", shakirasong);
singers.add(shakira);
ArrayList<Song> westlifesong = new ArrayList<>();
westlifesong.add(new Song("My Love"));
westlifesong.add(new Song("I Wanna Grow Old With You"));
westlifesong.add(new Song("I Lay My Love On You"));
westlifesong.add(new Song("Uptown Girl"));
westlifesong.add(new Song("If I Let You Go"));
Singer westlife = new Singer("Westlife", westlifesong);
singers.add(westlife);
SongAdapter adapter = new SongAdapter(singers);
recyclerView.setAdapter(adapter);
}
}
My Adapter
package com.example.expandableview;
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 com.thoughtbot.expandablerecyclerview.ExpandableRecyclerViewAdapter;
import com.thoughtbot.expandablerecyclerview.models.ExpandableGroup;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
public class SongAdapter extends ExpandableRecyclerViewAdapter<SingerViewHolder,SongViewHolder> {
public SongAdapter(List<?extends ExpandableGroup> groups) {
super(groups);
}
#Override
public SingerViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.expandable_recycleview_singer, parent, false);
return new SingerViewHolder(v);
}
#Override
public SongViewHolder onCreateChildViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.expandable_recyclerview_song, parent, false);
return new SongViewHolder(v);
}
#Override
public void onBindChildViewHolder(SongViewHolder holder, int flatPosition, ExpandableGroup group, int childIndex) {
final Song song = (Song) group.getItems().get(childIndex);
holder.bind(song);
}
#Override
public void onBindGroupViewHolder(SingerViewHolder holder, int flatPosition, ExpandableGroup group) {
final Singer singer = (Singer) group;
holder.bind(singer);
}
}
I Also used this code for search view
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater=getMenuInflater();
inflater.inflate(R.menu.example_menu,menu);
MenuItem searchItem=menu.findItem(R.id.action_search);
SearchView searchView=(SearchView) searchItem.getActionView();
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
adapter.getFilter().filter(newText);
return false;
}
});
return true;
}

How get spinner item position from Fragment to some Class?

I have some dummy problem, I need to get Spinner Item Position from the Fragment to this class:
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Spinner;
import com.example.nortti.politrange.R;
import com.example.nortti.politrange.intefaces.ICatalog;
import com.example.nortti.politrange.objects.Person;
import com.example.nortti.politrange.objects.Site;
import com.example.nortti.politrange.utils.WebApiAdapter;
import com.example.nortti.politrange.views.GeneralFragment;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
public class PersonCatalog implements ICatalog{
private final String COMMAND_PREFIX = "/api/stats/1";
private final WebApiAdapter apiAdapter = new WebApiAdapter(COMMAND_PREFIX);
private ArrayList<Person> catalogList = new ArrayList<Person>();
private Site site;
public PersonCatalog(Site site) {
this.site = site;
}
#Override
public ArrayList<Person> getCatalogList() {
return catalogList;
}
public void populateData() {
JSONArray jsonObject = null;
try {
jsonObject = (JSONArray)(new JSONParser()).parse(apiAdapter.select(null));
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
catalogList.clear();
Iterator<JSONObject> iterator = jsonObject.iterator();
while(iterator.hasNext()) {
JSONObject o = iterator.next();
catalogList.add(new Person((String)o.get("personName"),(int)(long)o.get("rank")));
}
}
}
I broke my head, I don't know how to do it. Please help! Should I use some Intents or create some getters?
UPD: Fragment Code
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.StrictMode;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Spinner;
import com.example.nortti.politrange.R;
import com.example.nortti.politrange.adapters.GenAdapter;
import com.example.nortti.politrange.adapters.SiteAdapter;
import com.example.nortti.politrange.intefaces.ICatalog;
import com.example.nortti.politrange.intefaces.impls.PersonCatalog;
import com.example.nortti.politrange.intefaces.impls.SitesCatalog;
import com.example.nortti.politrange.objects.Site;
public class GeneralFragment extends Fragment implements OnClickListener, OnItemSelectedListener {
private Button genApply;
private Spinner spinner;
private ListView genList;
private View header;
private ICatalog siteCatalogImpl;
private ICatalog personCatalogImpl;
public int Num;
public void setSpinnerSource(ICatalog siteCatalogImpl) {
this.siteCatalogImpl = siteCatalogImpl;
spinData();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View v = inflater.inflate(R.layout.general_fragment, container,false);
header = inflater.inflate(R.layout.gen_head, null);
spinner = (Spinner) v.findViewById(R.id.wSpin);
spinner.setOnItemSelectedListener(this);
genApply = (Button) v.findViewById(R.id.genApply);
genApply.setOnClickListener(this);
genList = (ListView) v.findViewById(R.id.genList);
genList.addHeaderView(header);
this.setSpinnerSource(new SitesCatalog());
Intent i = new Intent();
i.putExtra("spin", spinner.getSelectedItemPosition()+1);
return v;
}
private void spinData() {
siteCatalogImpl.populateData();
spinner.setAdapter(new SiteAdapter(getActivity(), siteCatalogImpl.getCatalogList()));
}
private void listData(Site site) {
personCatalogImpl = new PersonCatalog(site);
personCatalogImpl.populateData();
genList.setAdapter(new GenAdapter(getActivity(), personCatalogImpl.getCatalogList()));
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
#Override
public void onClick(View v) {
int siteIndex = spinner.getSelectedItemPosition();
switch (v.getId()) {
case R.id.genApply:
listData((Site)siteCatalogImpl.getCatalogList().get(siteIndex));
break;
}
}
}
I calling PersonCatalog at the listdata method.

Try this.
final ArrayList<String> providerlist= new ArrayList<String>();
Spinner spinner1 = (Spinner) findViewById(R.id.prospin);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, providerlist);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter1);
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
// On selecting a spinner item
String item = providerlist.get(position);
// Showing selected spinner item
Toast.makeText(this,
"Selected Country : " + item, Toast.LENGTH_LONG).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});