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Data doesn't show in recyclerView, need to go back to show it

I want to create an activity to search for users by full name. I created everything I needed and it worked properly, except for one thing. When I press search button the result are not show in recyclerview. I need to go back and the the results are shown. I need to do these 2 steps to see the results.
Yes the search bar and view holder are overlap, I will try to fixed later. Do you know how to make it so that once searched the results are displayed immediately without having to go back
This is my layout for view holder
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="75dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="5dp"
android:id="#+id/parent_layout"
android:background="#drawable/recycler_view_border">
<com.mikhaellopez.circularimageview.CircularImageView
android:id="#+id/imageProfile"
android:layout_width="60dp"
android:layout_height="60dp"
android:tint="#808080"
android:layout_marginStart="10dp"
android:layout_marginTop="7dp"
app:civ_border_color="#color/dark_blue"
app:civ_border_width="2dp"
app:srcCompat="#drawable/defaultimage"/>
<TextView
android:id="#+id/userFullName"
android:layout_toEndOf="#+id/imageProfile"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="25dp"
android:layout_marginEnd="20dp"
android:layout_marginStart="10dp"
android:gravity="center"
android:text="#string/fullname"
android:textSize="16sp"
android:textColor="#color/black"/>
<com.google.android.material.button.MaterialButton
android:id="#+id/buttonAdd"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginTop="13dp"
android:layout_marginEnd="10dp"
android:layout_marginStart="340dp"
android:background="#drawable/btn_background"
app:cornerRadius="8dp"
android:drawableTop="#drawable/ic_action_add" />
</RelativeLayout>
This is my layout for activity
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".SendFriendRequests">
<LinearLayout
android:id="#+id/linearlayout"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginLeft="13dp"
android:orientation="vertical"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<EditText
android:id="#+id/searchUsername"
android:layout_width="318dp"
android:layout_height="45dp"
android:layout_marginTop="20dp"
android:background="#drawable/edt_background"
android:hint="#string/searchFriends"
android:imeOptions="actionNext"
android:importantForAutofill="no"
android:inputType="text"
android:paddingStart="16dp"
android:paddingEnd="16dp" />
<com.google.android.material.button.MaterialButton
android:id="#+id/buttonSearch"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginStart="333dp"
android:layout_marginTop="-47dp"
android:layout_marginEnd="10dp"
android:background="#drawable/btn_background"
android:drawableTop="#drawable/ic_action_search"
app:cornerRadius="8dp" />
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="580dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearlayout"
app:layout_constraintVertical_bias="0.99"
tools:layout_editor_absoluteX="-16dp" />
</androidx.constraintlayout.widget.ConstraintLayout>
This is my adapter
package com.example.chatappjava;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import com.mikhaellopez.circularimageview.CircularImageView;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
public class SendFriendRequestAdapter extends RecyclerView.Adapter<SendFriendRequestAdapter.ViewHolder> {
private static final String TAG = "ContactsAdapter";
private ArrayList<UserData> arrayListUserData = new ArrayList<>();
private Context context;
public SendFriendRequestAdapter(ArrayList<UserData> arrayListUserData, Context context) {
this.arrayListUserData = arrayListUserData;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_send_friend_request_item, parent, false);
ViewHolder holder = new ViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(ViewHolder holder, #SuppressLint("RecyclerView") int position) {
Log.d(TAG, "onBindViewHolder: called.");
Glide.with(context)
.asBitmap()
.load(arrayListUserData.get(position).image)
.into(holder.userProfileImage);
holder.userFullName.setText(arrayListUserData.get(position).name);
holder.buttonAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
try {
Connection conn = DatabaseConnection.createDatabaseConnection();
PreparedStatement st1 = conn.prepareStatement(
" insert into FRIEND_REQUESTS values (?,?,?)");
st1.setString(1, arrayListUserData.get(position).friendId);
st1.setString(2, arrayListUserData.get(position).userId);
st1.setInt(3, 0);
st1.execute();
showToast("Friend request is sended");
Intent intent = new Intent(context, MainActivity.class);
intent.putExtra("IdAccount", arrayListUserData.get(position).userId);
context.startActivity(intent);
} catch (SQLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
});
holder.parentLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(context.getApplicationContext(), specificchat.class);
intent.putExtra("userId", arrayListUserData.get(position).userId);
intent.putExtra("friendId", arrayListUserData.get(position).friendId);
intent.putExtra("friendName", arrayListUserData.get(position).name);
intent.putExtra("friendImage", arrayListUserData.get(position).image);
context.startActivity(intent);
}
});
}
private void showToast(String message) {
Toast.makeText(context.getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
#Override
public int getItemCount() {
return arrayListUserData.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
CircularImageView userProfileImage;
TextView userFullName;
RelativeLayout parentLayout;
Button buttonAdd;
public ViewHolder(View itemView) {
super(itemView);
userProfileImage = itemView.findViewById(R.id.imageProfile);
userFullName = itemView.findViewById(R.id.userFullName);
parentLayout = itemView.findViewById(R.id.parent_layout);
buttonAdd = itemView.findViewById(R.id.buttonAdd);
}
}
}
And this is my java class which use the adapter
package com.example.chatappjava;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
public class SendFriendRequests extends AppCompatActivity {
private ArrayList<UserData> arrayListUserData = new ArrayList<>();
private Button searchButton;
private EditText searchUsername;
private String userId;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = getIntent();
userId = intent.getStringExtra("IdAccount");
setContentView(R.layout.activity_send_friend_request);
searchButton = findViewById(R.id.buttonSearch);
searchUsername = findViewById(R.id.searchUsername);
searchButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
try {
Connection conn = DatabaseConnection.createDatabaseConnection();
Statement statement = conn.createStatement();
ResultSet resultat = statement.executeQuery("select ID, FULLNAME, IMAGE from USERS where ID not in (select FRIEND_ID from FRIENDSLIST where USER_ID = " + userId + ") and FULLNAME like '%" + searchUsername.getText().toString() + "%' and ID not in (select RECEIVER_ID from FRIEND_REQUESTS where SENDER_ID = " + userId + ")");
while (resultat.next()) {
arrayListUserData.add(new UserData(resultat.getString("FULLNAME"), resultat.getString("IMAGE"), resultat.getString("ID"), userId));
}
} catch (SQLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
initRecycleView();
}
});
}
private void initRecycleView() {
RecyclerView recyclerView = findViewById(R.id.recyclerView);
SendFriendRequestAdapter adapter = new SendFriendRequestAdapter(arrayListUserData, this);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
}
}

I think it's the RecyclerView in your XML that needs to be adjusted at android:layout_height = "0dp"
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearlayout"/>

error occues 'java.lang.String com.example.myapplication.FindUSer.getUrlimage()' on a null object reference in andoid app [duplicate]

This question already has answers here:
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 2 years ago.
FindFriend.java
package com.example.myapplication;
import androidx.annotation.NonNull;
import androidx.appcompat.widget.Toolbar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
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 java.util.ArrayList;
import java.util.List;
import de.hdodenhof.circleimageview.CircleImageView;
public class Findfriend extends AppCompatActivity {
private Toolbar mtoolbar;
private Button SearchButton;
private EditText searchedittext;
ValueEventListener valueEventListener;
List<FindUSer> userslist;
FindUSer user;
private DatabaseReference alluser_refernce;
private RecyclerView searchresult;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_findfriend);
setContentView(R.layout.activity_findfriend);
searchedittext = findViewById(R.id.searchfriend);
SearchButton = findViewById(R.id.Searchbtn);
searchresult = findViewById(R.id.search_result_list);
mtoolbar = findViewById(R.id.my_toolbar1);
setSupportActionBar(mtoolbar);
GridLayoutManager gridLayoutManager=new GridLayoutManager(Findfriend.this,1);
userslist=new ArrayList<>();
userslist.add(user);
SearchButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
Adapter adapter=new Adapter(Findfriend.this,userslist);
searchresult.setAdapter(adapter);
searchresult.setLayoutManager(gridLayoutManager);
alluser_refernce = FirebaseDatabase.getInstance().getReference().child("Users");
valueEventListener=alluser_refernce.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange( DataSnapshot dataSnapshot) {
userslist.clear();
for (DataSnapshot usersnapshot : dataSnapshot.getChildren()) {
FindUSer user = usersnapshot.getValue(FindUSer.class);
System.out.println(String.valueOf(dataSnapshot));
userslist.add(user);
}
final Adapter adapter = new Adapter(Findfriend.this, userslist);
adapter.notifyDataSetChanged();
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
getSupportActionBar().setTitle("update User");
SearchButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String searchinput = searchedittext.getText().toString();
}
});
}
}
activity_findfriend.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimaryDark"
tools:context=".Findfriend">
<RelativeLayout
android:id="#+id/mylayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<androidx.appcompat.widget.Toolbar
android:id="#+id/my_toolbar1"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/simpletextid"
android:layout_alignParentEnd="true"
android:layout_marginStart="30dp"
android:text="#string/search_friends_here"
android:textColor="#android:color/background_light"
android:textSize="18sp"
android:layout_below="#id/my_toolbar1"
android:textStyle="bold"/>
<com.google.android.material.textfield.TextInputEditText
android:layout_width="350dp"
android:layout_height="wrap_content"
android:maxLines="1"
android:layout_alignParentStart="true"
android:layout_below="#id/simpletextid"
android:textColorHint="#android:color/background_light"
android:textColor="#android:color/background_light"
android:inputType="text"
android:ems="10"
android:id="#+id/searchfriend"
android:textSize="22sp"
android:hint="#string/search"/>
<Button
android:layout_width="40dp"
android:layout_height="wrap_content"
android:background="#drawable/search_icon_foreground"
android:id="#+id/Searchbtn"
android:layout_alignParentEnd="true"
android:layout_marginEnd="15dp"
android:layout_below="#id/simpletextid"/>
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:id="#+id/search_result_list"
android:layout_below="#id/searchfriend"/>
</RelativeLayout>
<com.google.android.material.navigation.NavigationView
android:id="#+id/navigation"
android:background="#97145C"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:menu="#menu/nav_items">
</com.google.android.material.navigation.NavigationView>
</androidx.drawerlayout.widget.DrawerLayout>
all_user_display_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
>
<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:background="#363131"
>
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="85dp"
android:layout_height="85dp"
android:id="#+id/all_user_profile_image"
android:layout_marginLeft="10dp"
android:src="#drawable/progileicon"/>
<TextView
android:id="#+id/all_users_profile_name"
android:layout_width="200dp"
android:layout_marginTop="5dp"
android:layout_marginLeft="100dp"
android:layout_height="wrap_content"
android:text="user full name"
android:textAlignment="textStart"
android:textColor="#color/colorPrimaryDark"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:id="#+id/userstatus"
android:layout_width="200dp"
android:layout_marginTop="30dp"
android:layout_marginLeft="100dp"
android:layout_height="wrap_content"
android:text="status"
android:textAlignment="textStart"
android:textColor="#color/colorPrimaryDark"
android:textSize="16sp"/>
<TextView
android:id="#+id/usermail"
android:layout_width="200dp"
android:layout_marginTop="80dp"
android:layout_marginLeft="30dp"
android:layout_height="wrap_content"
android:text="mail#id"
android:textAlignment="textStart"
android:textColor="#color/colorPrimaryDark"
android:textSize="16sp"/>
</androidx.cardview.widget.CardView>
</RelativeLayout>
Adapter.java
package com.example.myapplication;
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.bumptech.glide.Glide;
import org.w3c.dom.Text;
import java.util.List;
import static androidx.constraintlayout.widget.Constraints.TAG;
public class Adapter extends RecyclerView.Adapter<Adapter.Userviewholder> {
private Context context;
private List<FindUSer> myuserslist;
public Adapter(Context context,List<FindUSer> myuserslist){
this.context=context;
this.myuserslist=myuserslist;
}
#Override
public Userviewholder onCreateViewHolder(ViewGroup parent, int viewType) {
View mview = LayoutInflater.from(context).inflate
(R.layout.all_user_display_layout, parent, false);
return new Userviewholder(mview);
}
#Override
public void onBindViewHolder( Userviewholder holder, int position) {
final FindUSer user = myuserslist.get(position);
try{
Glide.with(context).load(user.getUrlimage()).into(holder.userimg);}
catch(NullPointerException e){
Log.e(TAG, e.toString());}
try{
holder.mailid.setText(user.getEmail());}
catch(NullPointerException e){
Log.e(TAG, e.toString());}
try{
holder.status.setText(user.getStatus());}
catch(NullPointerException e){
Log.e(TAG, e.toString());}
try{
holder.name.setText(user.getUsername());}
catch(NullPointerException e){
Log.e(TAG, e.toString());}
}
#Override
public int getItemCount() {
return myuserslist.size();
}
class Userviewholder extends RecyclerView.ViewHolder {
ImageView userimg;
TextView name, status, mailid;
public Userviewholder(View itemview) {
super(itemview);
userimg = itemview.findViewById(R.id.all_user_profile_image);
name = itemview.findViewById(R.id.all_users_profile_name);
status = itemview.findViewById(R.id.userstatus);
mailid = itemview.findViewById(R.id.usermail);
}
}
}
Error_log
E/Constraints: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String
com.example.myapplication.FindUSer.getUrlimage()' on a null object reference
E/Constraints: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String
com.example.myapplication.FindUSer.getEmail()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String
com.example.myapplication.FindUSer.getStatus()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String
com.example.myapplication.FindUSer.getUsername()' on a null object reference
Error occurred when Attempt to invoke virtual method 'java.lang.String
com.example.myapplication.FindUSer.getUrlimage()' on a null object reference when i am trying to put details in the recycler view. I am able to get values from firebase but not able to put on then in recycler view

In FindFriend.java
Remove this line
userslist.add(user);
Which is written right after you set userslist=new ArrayList<>(); its the same as adding null to your list.
I hope this fixes your issue

Android RecyclerView only display one item

I tried other answers but nothing worked. for some reason RecyclerView only displaying one item. I tried changing layout height to wrap content but it didn't worked, still displaying only one item. I'm passing about 20 items.
I have to type more otherwise stackoverflow won't let me post this question. because it mostly code
feed_list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/txtStatus"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/txtTransaction"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/txtGeneral"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Arrays;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
Button btnget;
RecyclerView recycler;
private Session session;
private TextView textViewResult;
ArrayList<Feed> feed ;
private feedadapter feedadap;
String token ="Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJ ";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recycler = findViewById(R.id.recyclerView);
recycler.setLayoutManager(new LinearLayoutManager(this));
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https:url/")
.addConverterFactory(GsonConverterFactory.create())
.build();
JsonPlaceHolderApi jsonPlaceHolderApi = retrofit.create(JsonPlaceHolderApi.class);
Call<Feed> call = jsonPlaceHolderApi.getposts( token);
call.enqueue(new Callback<Feed>() {
#Override
public void onResponse(Call<Feed> call, Response<Feed> response) {
feed = new ArrayList<>(Arrays.asList(response.body()));
feedadap = new feedadapter(MainActivity.this,feed);
recycler.setAdapter(feedadap);
Log.d("msgcontent",feed.toString());
}
#Override
public void onFailure(Call<Feed> call, Throwable t) {
}
});
}
#Override
public void onClick(View view) {
}
}

check getItemCount() in your FeedAdapter.
it's must look like this:
#Override
public int getItemCount() {
return feed.size();
}

firebase recycler view crashing on scrolling down

Hii I am trying to read data from firebase database and storage to Firebase recycler everything is working fine till I am scrolling the Recycler view down then app is crashing here is my code
MODEL CLASS
package com.example.ace.park;
public class model {
public String name,num,type,sno;
public model(String name, String num, String type, String sno) {
this.name = name;
this.num = num;
this.type = type;
this.sno = sno;
}
public model() {
}
}
Here is JAVA CLASS
package com.example.ace.park;
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
public class dis extends AppCompatActivity {
NavigationView navigationView;
TextView textView;
Intent intent;
FirebaseRecyclerAdapter<model, displayAdapter> adapter;
FirebaseRecyclerOptions<model> options;
RecyclerView recyclerView;
DatabaseReference mDatabase,query;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dis);
recyclerView = findViewById(R.id.myRecView);
mDatabase = FirebaseDatabase.getInstance().getReference().child("parkings");
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
query = FirebaseDatabase.getInstance().getReference().child("parkings");
options = new FirebaseRecyclerOptions.Builder<model>()
.setQuery(query, model.class)
.build();
adapter = new FirebaseRecyclerAdapter<model, displayAdapter>(
options) {
#Override
public displayAdapter onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler, parent, false);
return new displayAdapter(v);
}
#Override
protected void onBindViewHolder(displayAdapter holder, final int position, final model current) {
holder.setName(current.name);
holder.setTotal(current.num);
holder.setType(current.type);
holder.setImage(getApplicationContext(),current.sno,current.sno);
holder.mview.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(dis.this, ""+position, Toast.LENGTH_SHORT).show();
}
});
}
};
//Populate Item into Adapter
recyclerView.setAdapter(adapter);
}
#Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
#Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}
}
Here is Adapter
package com.example.ace.park;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.storage.FileDownloadTask;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import java.io.File;
import java.io.IOException;
public class displayAdapter extends RecyclerView.ViewHolder {
public View mview;
public displayAdapter(View itemView) {
super(itemView);
mview = itemView;
}
public void setName(String name){
TextView recName = mview.findViewById(R.id.recyclerName);
recName.setText(name);
}
public void setTotal(String title){
TextView t = mview.findViewById(R.id.recyclerTotal);
t.setText(title);
}
public void setType(String type){
TextView t = mview.findViewById(R.id.recyclerType);
t.setText(type);
}
public void setImage(Context ctx, String image,String user){
final ImageView iv = mview.findViewById(R.id.recyclerImg);
FirebaseStorage storage = FirebaseStorage.getInstance();
StorageReference storageReference = storage.getReference().child("Parkings"+"/"+image);
try {
final File localFile = File.createTempFile("images", "jpg");
storageReference.getFile(localFile).addOnSuccessListener(new OnSuccessListener<FileDownloadTask.TaskSnapshot>() {
#Override
public void onSuccess(FileDownloadTask.TaskSnapshot taskSnapshot) {
Bitmap bitmap = BitmapFactory.decodeFile(localFile.getAbsolutePath());
iv.setImageBitmap(bitmap);
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception exception) {
}
});
} catch (IOException e ) {
Toast.makeText(ctx, "Error in Adapter", Toast.LENGTH_SHORT).show();
}
}
}
This is recycler layout
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
app:cardCornerRadius="10dp"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/recyclerName"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:textColor="#212020"
android:textSize="30sp"
android:text="#string/name_of_place"
/>
<ImageView
android:layout_width="300dp"
android:layout_marginTop="30dp"
android:layout_height="230dp"
android:scaleType="centerCrop"
android:paddingLeft="10dp"
android:layout_gravity="center"
android:paddingRight="10dp"
android:id="#+id/recyclerImg"
android:contentDescription="#string/img"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:textColor="#615f5f"
android:textSize="18sp"
android:id="#+id/recyclerTotal"
android:text="#string/tsp"
/>
<TextView
android:layout_width="match_parent"
android:layout_marginTop="5dp"
android:text="#string/type"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:id="#+id/recyclerType"
android:layout_height="25dp"
android:textSize="18sp"
android:layout_marginBottom="5dp"
/>
</LinearLayout>
</android.support.v7.widget.CardView>
Logcat is giving his error
11-21 20:37:32.885 9681-9681/com.example.ace.park E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.ace.park, PID: 9681
com.google.firebase.database.DatabaseException: Can't convert object of type java.lang.Long to type com.example.ace.park.model
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertBean(com.google.firebase:firebase-database##16.0.5:423)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass(com.google.firebase:firebase-database##16.0.5:214)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass(com.google.firebase:firebase-database##16.0.5:79)
at com.google.firebase.database.DataSnapshot.getValue(com.google.firebase:firebase-database##16.0.5:212)
at com.firebase.ui.database.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:29)
at com.firebase.ui.database.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:15)
at com.firebase.ui.common.BaseCachingSnapshotParser.parseSnapshot(BaseCachingSnapshotParser.java:35)
at com.firebase.ui.common.BaseObservableSnapshotArray.get(BaseObservableSnapshotArray.java:52)
at com.firebase.ui.database.FirebaseRecyclerAdapter.getItem(FirebaseRecyclerAdapter.java:106)
at com.firebase.ui.database.FirebaseRecyclerAdapter.onBindViewHolder(FirebaseRecyclerAdapter.java:122)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6673)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6714)
at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5647)
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5913)
at android.support.v7.widget.GapWorker.prefetchPositionWithDeadline(GapWorker.java:285)
at android.support.v7.widget.GapWorker.flushTaskWithDeadline(GapWorker.java:342)
at android.support.v7.widget.GapWorker.flushTasksWithDeadline(GapWorker.java:358)
at android.support.v7.widget.GapWorker.prefetch(GapWorker.java:365)
at android.support.v7.widget.GapWorker.run(GapWorker.java:396)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
this is image of database structure

firebaseRecyclerAdapter gets filled, yet wont show anything in a dialog - Android Studio

So, I tried putting a recyclerView in a "popup" dialog using a firebaseRecyclerAdapter.
My problem is, that I know for sure the adapter gets filled because I was using the Logcat to tell me when it adds another "user" to the adapter, but it wont show anything in the recyclerview in the dialog.
I'm having this problem for a couple of days and couldn't find an answer yet, glad if you could help me :)
I'm using a main screen which changes fragments, and from a certain fragment I'm calling this specific dialog.
These are my files:
UserViewHolder - the class which holds the "sets" for the cardview:
public static class UserViewHolder extends RecyclerView.ViewHolder
{
View mView;
public UserViewHolder(View itemView)
{
super(itemView);
mView=itemView;
}
public void setName(String name)
{
TextView teacherName=(TextView) mView.findViewById(R.id.txtNameTea);
teacherName.setText(name);
}
public void setEmail(String email)
{
TextView txtEmailTea=(TextView) mView.findViewById(R.id.txtEmailTea);
txtEmailTea.setText(email);
}
public void setImage(final Context ctx, Uri imageUri, User cUser)
{
final ImageView imgProfileTea=(ImageView) mView.findViewById(R.id.imgProfileTea);
Picasso.with(ctx).load(cUser.getImageUri()).into(imgProfileTea);
if(imgProfileTea.getDrawable()==null) {
StorageReference load = FirebaseStorage.getInstance().getReference().child("usersProfilePic/" + cUser.getImageName());
load.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
#Override
public void onSuccess(Uri uri) {
Picasso.with(ctx).load(uri.toString()).into(imgProfileTea);
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(ctx, e.getMessage(), Toast.LENGTH_LONG);
}
});
}
}
}
Schedules - the fragment which calls the dialog from its toolbar:
package com.example.android.aln4;
import android.app.ActionBar;
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.github.sundeepk.compactcalendarview.CompactCalendarView;
import com.github.sundeepk.compactcalendarview.domain.Event;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.storage.FirebaseStorage;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import static com.example.android.aln4.LoginActivity.myUser;
import static com.example.android.aln4.dataBase.mDatabaseReference;
import static com.example.android.aln4.dataBase.mFirebaseDatabase;
import static com.example.android.aln4.dataBase.mStorageRef;
import static com.example.android.aln4.navDrawerMain.firebaseRecyclerAdapter;
import static java.lang.System.in;
import static com.example.android.aln4.navDrawerMain.studentsQuery;
public class Schedules extends Fragment {
private Toolbar ScheduleToolbar;
private Button addEvent;
//private TextView txt;
private RecyclerView mRecyclerViewStudentEvent;
private CompactCalendarView compactCalendar;
private SimpleDateFormat dateFormatMonth = new SimpleDateFormat("MMMM-yyyy", Locale.getDefault());
private String[] monthName = {"January", "February", "March", "April", "May", "June", "July",
"August", "September", "October", "November", "December"};
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.addEvent:
final AlertDialog.Builder mBuilder = new AlertDialog.Builder(getContext());
View mView = getLayoutInflater().inflate(R.layout.dialog_event_creation, null);
mRecyclerViewStudentEvent = (RecyclerView) mView.findViewById(R.id.mRecyclerViewStudentEvent);
mRecyclerViewStudentEvent.setHasFixedSize(true);
mRecyclerViewStudentEvent.setLayoutManager(new LinearLayoutManager(getContext()));
setStudentsList();
mView = getLayoutInflater().inflate(R.layout.dialog_event_creation, null);
final EditText edtEventTitle = (EditText) mView.findViewById(R.id.edtEventTitle);
final TextView txtEventStartTime = (TextView) mView.findViewById(R.id.txtEventStartTime);
final TextView txtEventEndTime = (TextView) mView.findViewById(R.id.txtEventEndTime);
final EditText edtEventLocation = (EditText) mView.findViewById(R.id.edtEventLocation);
Button btnOfferEvent = (Button) mView.findViewById(R.id.btnOfferEvent);
mBuilder.setView(mView);
final AlertDialog dialog = mBuilder.create();
btnOfferEvent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Calendar startTime = Calendar.getInstance();
Calendar endTime = Calendar.getInstance();
int startHour = Integer.parseInt(txtEventStartTime.getText().toString().substring(0, 2));
int startMinute = Integer.parseInt(txtEventStartTime.getText().toString().substring(3, 5));
startTime.set(Calendar.HOUR_OF_DAY, startHour);
startTime.set(Calendar.MINUTE, startMinute);
int endHour = Integer.parseInt(txtEventEndTime.getText().toString().substring(0, 2));
int endMinute = Integer.parseInt(txtEventEndTime.getText().toString().substring(3, 5));
endTime.set(Calendar.HOUR_OF_DAY, endHour);
endTime.set(Calendar.MINUTE, endMinute);
String mId =/*dataSelected+*/ String.valueOf(startHour) + String.valueOf(startMinute);//+selectedUserID
EventCreation newEvent = new EventCreation(mId, startTime, endTime, edtEventTitle.getText().toString(), edtEventLocation.getText().toString(), R.color.colorPrimary);
dialog.dismiss();
}
});
dialog.show();
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setHasOptionsMenu(true);
ScheduleToolbar = (Toolbar) getView().findViewById(R.id.schedule_toolbar);
// Setting toolbar as the ActionBar with setSupportActionBar() call
((AppCompatActivity) getActivity()).setSupportActionBar(ScheduleToolbar);
mFirebaseDatabase = FirebaseDatabase.getInstance();
mDatabaseReference = mFirebaseDatabase.getReference("users");
mStorageRef = FirebaseStorage.getInstance().getReference();
Calendar cal = Calendar.getInstance();
String month = monthName[cal.get(Calendar.MONTH)];
int year = cal.get(Calendar.YEAR);
getActivity().setTitle(month + "-" + year);
compactCalendar = (CompactCalendarView) getView().findViewById(R.id.compactcalendar_view);
compactCalendar.setUseThreeLetterAbbreviation(true);
long millis = System.currentTimeMillis() % 1000;
Event ev1 = new Event(Color.RED, millis, "First try");
compactCalendar.addEvent(ev1);
compactCalendar.setListener(new CompactCalendarView.CompactCalendarViewListener() {
#Override
public void onDayClick(Date dateClicked) {
//put events into scroll view adapter
}
#Override
public void onMonthScroll(Date firstDayOfNewMonth) {
getActivity().setTitle(dateFormatMonth.format(firstDayOfNewMonth));
}
});
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.schedules, container, false);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_main, menu);
}
private void setStudentsList() {
studentsQuery=mDatabaseReference.orderByChild("teacherNum").equalTo(myUser.getTeacherNum());
firebaseRecyclerAdapter=new FirebaseRecyclerAdapter<User, navDrawerMain.UserViewHolder>(
User.class,R.layout.card_view_teacher,navDrawerMain.UserViewHolder.class,studentsQuery) {
#Override
protected void populateViewHolder(navDrawerMain.UserViewHolder viewHolder, User model, int position) {
viewHolder.setName(model.getFirstName() + " " + model.getLastName());
viewHolder.setEmail(model.getEmail());
viewHolder.setImage(getContext(), Uri.parse(model.getImageUri()), model);
}
};
mRecyclerViewStudentEvent.setAdapter(firebaseRecyclerAdapter);
}
}
The dialog xml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:layout_width="50dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_marginTop="20dp"
android:src="#mipmap/title"/>
<EditText
android:id="#+id/edtEventTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="כותרת"
android:layout_marginRight="50dp"/>
<android.support.v7.widget.RecyclerView
android:layout_marginTop="50dp"
android:id="#+id/mRecyclerViewStudentEvent"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginTop="20dp"
android:orientation="vertical">
<ImageView
android:layout_width="50dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_marginTop="20dp"
android:src="#mipmap/clock"/>
<TextView
android:layout_width="wrap_content"
android:layout_marginRight="50dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="שעת התחלה"
android:textSize="20dp" />
<TextView
android:id="#+id/txtEventStartTime"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginLeft="5dp"
android:layout_marginRight="50dp"
android:layout_marginTop="5dp"
android:text="21:00" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="25dp"
android:layout_marginRight="50dp"
android:background="#color/darkgray" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="50dp"
android:layout_alignParentRight="true"
android:layout_marginTop="26dp"
android:text="שעת סיום"
android:textSize="20dp" />
<TextView
android:id="#+id/txtEventEndTime"
android:layout_width="match_parent"
android:layout_marginRight="50dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginLeft="5dp"
android:layout_marginTop="30dp"
android:text="21:45" />
</RelativeLayout>
<RelativeLayout
android:layout_marginTop="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:layout_width="50dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_marginTop="20dp"
android:src="#mipmap/location"/>
<EditText
android:id="#+id/edtEventLocation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="מיקום תחילת השיעור"
android:layout_marginRight="50dp"/>
</RelativeLayout>
<Button
android:id="#+id/btnOfferEvent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="100dp"
android:layout_gravity="center_horizontal"
android:text="הצע שיעור"/>
</LinearLayout>
One more thing is that I know is that I'm already able to bring up users into the recyclerView in other fragments.. Here's the code in another fragment:
package com.example.android.aln4;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.storage.FirebaseStorage;
import static com.example.android.aln4.dataBase.mDatabaseReference;
import static com.example.android.aln4.dataBase.mFirebaseDatabase;
import static com.example.android.aln4.dataBase.mStorageRef;
import static com.example.android.aln4.navDrawerMain.firebaseRecyclerAdapter;
import static com.example.android.aln4.navDrawerMain.teachersQuery;
public class TeachersList extends Fragment {
private RecyclerView mRecyclerViewTeacher;
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getActivity().setTitle("מורים");
mFirebaseDatabase = FirebaseDatabase.getInstance();
mDatabaseReference = mFirebaseDatabase.getReference("users");
mStorageRef = FirebaseStorage.getInstance().getReference();
mRecyclerViewTeacher=(RecyclerView) getView().findViewById(R.id.mRecyclerViewTeacher);
mRecyclerViewTeacher.setHasFixedSize(true);
mRecyclerViewTeacher.setLayoutManager(new LinearLayoutManager(getContext()));
setTeachersList();
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.teachers_list_frag,container,false);
}
private void setTeachersList() {
teachersQuery=mDatabaseReference.orderByChild("type").equalTo("Teacher");
firebaseRecyclerAdapter=new FirebaseRecyclerAdapter<User, navDrawerMain.UserViewHolder>(
User.class,R.layout.card_view_teacher,navDrawerMain.UserViewHolder.class,teachersQuery) {
#Override
protected void populateViewHolder(navDrawerMain.UserViewHolder viewHolder, User model, int position) {
viewHolder.setName(model.getFirstName()+" "+model.getLastName());
viewHolder.setEmail(model.getEmail());
viewHolder.setImage(getContext(), Uri.parse(model.getImageUri()),model);
}
};
mRecyclerViewTeacher.setAdapter(firebaseRecyclerAdapter);
}
}
and its xml file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/mRecyclerViewTeacher"
android:layout_marginTop="57dp"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
It's one of my first questions here so I apologize if I missed something :)
Any help would be appriciated.

Solved. All I did was regenerating the SHA1 in the firebase settings, and removing the setHasFixedSize line from Schedules activity and it worked just fine.