Recycler View is Not Displaying

Question

Issue: Recycler View is not displaying. There is no error logged. The page is just blank. I did attempt to look at other similar Recycler View issues, but I have not been able to figure out the problem. I played around with the layout to make sure views were not overlapping but that did not fix the issue. I also looked through the java file but cannot find anything wrong with it. Any help will be appreciated. Thank you!

<?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:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Personal_Wall"
    tools:openDrawer="end">




    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:id="@+id/coordinator_layout"
        android:layout_width="match_parent"
        android:background="#ffff"
        android:layout_height="match_parent">


        <LinearLayout
            android:id="@+id/linearLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">



            <androidx.appcompat.widget.Toolbar
                android:id="@+id/toolbar"
                elevation="4dp"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="#ffff"
                android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light">


                <ImageView
                    android:id="@+id/splashd_logo_button"
                    android:layout_width="120dp"
                    android:layout_height="60dp"
                    android:layout_gravity="right"
                    android:paddingRight="10dp"
                    android:src="@drawable/new_splashd_logo_black"
                    android:text="hapana_button" />


            </androidx.appcompat.widget.Toolbar>


            <androidx.core.widget.NestedScrollView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fillViewport="true"
                android:overScrollMode="never"
                app:layout_behavior="@string/appbar_scrolling_view_behavior">


                <FrameLayout
                    android:id="@+id/fragment-containter2"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">



                    <ImageButton
                        android:id="@+id/edit_icon"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="245dp"
                        android:layout_marginTop="250dp"
                        android:elevation="6dp"
                        android:background="@color/fui_transparent"
                        app:srcCompat="@drawable/ic_camera_icon" />



                    <de.hdodenhof.circleimageview.CircleImageView
                        android:id="@+id/profile_place_holder"
                        android:layout_width="200dp"
                        android:layout_height="200dp"
                        android:layout_gravity="center_horizontal"
                        android:layout_marginTop="95dp"
                        android:elevation="4dp"
                        android:src="@drawable/grey_oval"
                        app:civ_border_color="#fff"
                        app:civ_border_width="5dp" />

                    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
                        android:layout_width="wrap_content"
                        android:layout_height="250dp"
                        android:layout_gravity="center_horizontal"
                        android:layout_marginTop="15dp"
                        card_view:cardBackgroundColor="#fff"
                        card_view:cardCornerRadius="8dp">

                        <ImageView
                            android:id="@+id/temporary_banner_personal_wall"
                            android:layout_width="380dp"
                            android:layout_height="250dp"
                            android:layout_gravity="center_horizontal"
                            android:adjustViewBounds="true"
                            android:scaleType="centerCrop"
                            app:srcCompat="@drawable/roundec_corner_rectangle_grey" />
                    </androidx.cardview.widget.CardView>


                    <TextView
                        android:id="@+id/personal_wall_text_first_name"
                        android:layout_width="193dp"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="158dp"
                        android:layout_marginTop="310dp"
                        android:layout_marginRight="50dp"
                        android:layout_weight="0.5"
                        android:background="@android:color/transparent"
                        android:ems="10"
                        android:fontFamily="@font/roboto_bold"
                        android:inputType="textPersonName"
                        android:text="First"
                        android:textColor="#000"
                        android:textSize="30dp" />

                    <TextView
                        android:id="@+id/personal_wall_text_last_name"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="210dp"
                        android:layout_marginTop="310dp"
                        android:layout_weight="0.5"
                        android:background="@android:color/transparent"
                        android:ems="10"
                        android:fontFamily="@font/roboto_bold"
                        android:inputType="textPersonName"
                        android:text="Last"
                        android:textColor="#000"
                        android:textSize="30dp" />


                    <de.hdodenhof.circleimageview.CircleImageView
                        android:id="@+id/small_grey_circle"
                        android:layout_width="78dp"
                        android:layout_height="52dp"
                        android:layout_marginLeft="10dp"
                        android:layout_marginTop="408dp"
                        android:src="@drawable/small_grey_circle" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Current Location: Washington D.C."
                        android:textSize="18dp"
                        android:textColor="#000"
                        android:fontFamily="@font/roboto_medium"
                        android:layout_marginTop="360dp"
                        android:layout_gravity="center_horizontal"
                        android:drawableLeft="@drawable/ic_profile_location_on_black_24dp"

                        >

                    </TextView>


                    <ImageView
                        android:id="@+id/personal_wall_post_something_box"
                        android:layout_width="290dp"
                        android:layout_height="69dp"
                        android:layout_marginLeft="95dp"
                        android:layout_marginTop="398dp"
                        android:src="@drawable/make_a_splash_oval" />

                    <TextView
                        android:id="@+id/assists_count"
                        android:layout_width="73dp"
                        android:layout_height="38dp"
                        android:layout_marginLeft="45dp"
                        android:layout_marginTop="550dp"
                        android:layout_weight="0.5"
                        android:background="@android:color/transparent"
                        android:ems="10"
                        android:fontFamily="@font/roboto_light"
                        android:text="Assists"
                        android:textColor="#000"
                        android:textSize="15dp"
                        android:textAlignment="center"/>



                    <TextView
                        android:id="@+id/assists_count_actual_number"
                        android:layout_width="73dp"
                        android:layout_height="38dp"
                        android:layout_marginLeft="45dp"
                        android:layout_marginTop="515dp"
                        android:textAlignment="center"
                        android:layout_weight="0.5"
                        android:background="@android:color/transparent"
                        android:ems="10"
                        android:fontFamily="@font/roboto_bold"
                        android:text="3"
                        android:textColor="#000"
                        android:textSize="22dp" />


                    <TextView
                        android:id="@+id/followers_count"
                        android:layout_width="102dp"
                        android:layout_height="39dp"
                        android:layout_marginLeft="143dp"
                        android:layout_marginTop="550dp"
                        android:layout_weight="0.5"
                        android:background="@android:color/transparent"
                        android:ems="10"
                        android:fontFamily="@font/roboto_light"
                        android:text="Followers"
                        android:textColor="#000"
                        android:textSize="15dp"
                        android:textAlignment="center"/>


                    <TextView
                        android:id="@+id/followers_count_actual_number"
                        android:layout_width="102dp"
                        android:layout_height="39dp"
                        android:layout_marginLeft="144dp"
                        android:layout_marginTop="515dp"
                        android:textAlignment="center"
                        android:layout_weight="0.5"
                        android:background="@android:color/transparent"
                        android:ems="10"
                        android:fontFamily="@font/roboto_bold"
                        android:text="2"
                        android:textColor="#000"
                        android:textSize="22dp" />




                    <TextView
                        android:id="@+id/splash_count"
                        android:layout_width="102dp"
                        android:layout_height="39dp"
                        android:layout_marginLeft="250dp"
                        android:layout_marginTop="550dp"
                        android:layout_weight="0.5"
                        android:background="@android:color/transparent"
                        android:fontFamily="@font/roboto_light"
                        android:text="Splashes"
                        android:textColor="#000"
                        android:textSize="15dp"
                        android:textAlignment="center"/>



                    <TextView
                        android:id="@+id/splash_count_actual_number"
                        android:layout_width="102dp"
                        android:layout_height="39dp"
                        android:textAlignment="center"
                        android:layout_marginLeft="250dp"
                        android:layout_marginTop="515dp"
                        android:layout_weight="0.5"
                        android:background="@android:color/transparent"
                        android:ems="10"
                        android:fontFamily="@font/roboto_bold"
                        android:text="5"
                        android:textColor="#000"
                        android:textSize="22dp" />







                    <View
                        android:layout_width="match_parent"
                        android:layout_height="10dp"
                        android:layout_marginTop="590dp"
                        android:background="@android:color/darker_gray" />



                    <View
                        android:layout_width="match_parent"
                        android:layout_height="1dp"
                        android:layout_marginTop="488dp"
                        android:background="#E8E8E8" />





                    <TextView
                        android:id="@+id/testing_scrollview"
                        android:layout_width="102dp"
                        android:layout_height="39dp"
                        android:layout_marginLeft="293dp"
                        android:layout_marginTop="1400dp"
                        android:layout_weight="0.5"
                        android:fontFamily="@font/roboto_light"
                        android:text="TEST"
                        android:textColor="#000"
                        android:layout_marginBottom="120dp"
                        android:textSize="20dp"
                        android:textAlignment="center"/>


                </FrameLayout>


            </androidx.core.widget.NestedScrollView>


        </LinearLayout>






        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycler_view_post_list"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:layout_marginTop="700dp"
            android:layout_above="@+id/fragment_container_3">
        </androidx.recyclerview.widget.RecyclerView>








        <FrameLayout
            android:id="@+id/fragment_container_3"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            >
            <!-- Main content -->
            <com.google.android.material.bottomnavigation.BottomNavigationView
                android:id="@+id/bottom_navigation"
                android:layout_width="match_parent"
                android:layout_height="80dp"
                android:layout_gravity="bottom"
                android:background="?android:attr/windowBackground"
                app:itemIconTint="@color/bottom_navigation_selected_color"
                app:itemTextColor="@color/bottom_navigation_selected_color"
                app:labelVisibilityMode="unlabeled"
                app:menu="@menu/bottom_navigation_menu"
                app:itemIconSize="@dimen/bottom_navigation_icon_size"
                />
        </FrameLayout>



    </androidx.coordinatorlayout.widget.CoordinatorLayout>








    <com.google.android.material.navigation.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/nav_header"
        app:menu="@menu/drawer_menu" />


</androidx.drawerlayout.widget.DrawerLayout> 


---------------------------------------------------------




package com.example.updatedhapana1;

import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.view.GravityCompat;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;


import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Typeface;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.StyleSpan;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;


import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.google.android.material.navigation.NavigationView;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
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 com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;
import com.squareup.picasso.Picasso;
import com.theartofdev.edmodo.cropper.CropImage;
import com.theartofdev.edmodo.cropper.CropImageView;


import de.hdodenhof.circleimageview.CircleImageView;

import static com.example.updatedhapana1.Personal_Wall_Edit.Gallery_Pick2;


public class Personal_Wall extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
    Window window;
    private DrawerLayout drawer;
    private Bitmap bitmap;
    private Uri uri;

    private RecyclerView postList; //TRYING RECYCLER VIEW AGAIN AHHHHHHHHHH!


    private String currentUserID;
    private DatabaseReference UsersReference;
    private CircleImageView profile_image;
    private StorageReference UserProfileImageRef;
    private FirebaseAuth mAuth;
    private ImageView post_question;
    private ImageButton edit_profile;
    private DatabaseReference mDatabaseRef;
    private ImageView banner_view;
    private ImageButton splash_gallery;


    FirebaseUser currentUser;

    TextView mfirstname;
    TextView mlastname;
    TextView firstname_for_main_profile;
    TextView lastname_for_main_profile;

    NavigationView mNavigationView;
    CircleImageView m_nav_header_profile_image;
    CircleImageView profile_placeholder_personal_wall;
    CircleImageView little_circle_personal_wall;

    FirebaseDatabase mfirebaseDatabase;
    final static int Gallery_Pick = 1;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_personal__wall);
        little_circle_personal_wall = findViewById(R.id.small_grey_circle); //this is to bring in the profile picture from the database


        //////This change the status bar color and the status bar text color. I wanted the status bar to be white.//////////
        if (Build.VERSION.SDK_INT > 21) {
            window = this.getWindow();
            window.setStatusBarColor(this.getResources().getColor(R.color.white));
            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);//  set status text dark


        }
        //////This change the status bar color and the status bar text color. I wanted the status bar to be white.//////////


        mAuth = FirebaseAuth.getInstance();
        currentUserID = mAuth.getCurrentUser().getUid();
        UsersReference = FirebaseDatabase.getInstance().getReference().child("Users").child(currentUserID);
        UserProfileImageRef = FirebaseStorage.getInstance().getReference().child("Profile Images");
        profile_image = findViewById(R.id.profile_place_holder_edit);
        mDatabaseRef = FirebaseDatabase.getInstance().getReference("uploads");
        profile_placeholder_personal_wall = findViewById(R.id.profile_place_holder);
        banner_view = findViewById(R.id.temporary_banner_personal_wall);


        //RECYCLERVIEW//
        postList = (RecyclerView) findViewById(R.id.recycler_view_post_list);
        postList.setHasFixedSize(true);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setReverseLayout(true);
        linearLayoutManager.setStackFromEnd(true);
        postList.setLayoutManager(linearLayoutManager);
        //RECYCLERVIEW//

----------------------------------------------------

@Override
    protected void onStart() {
        super.onStart();

        FirebaseRecyclerOptions<Posts> options =
                new FirebaseRecyclerOptions.Builder<Posts>()
                .setQuery(UsersReference, Posts.class)
                .build();



        FirebaseRecyclerAdapter<Posts,FindPostsViewHolder> adapter =
                new FirebaseRecyclerAdapter<Posts, FindPostsViewHolder>(options) {
                    @Override
                    protected void onBindViewHolder(@NonNull FindPostsViewHolder findPostsViewHolder, int i, @NonNull Posts posts)
                    {
                        findPostsViewHolder.first_name.setText(posts.getFirst_name());
                        findPostsViewHolder.last_name.setText(posts.getLast_name());
                        findPostsViewHolder.post_date.setText(posts.getPost_date());
                        findPostsViewHolder.post_body_text.setText(posts.getPost_body_text());



                    }

                    @NonNull
                    @Override
                    public FindPostsViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
                        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.post_layout_2, viewGroup, false);
                        FindPostsViewHolder viewHolder = new FindPostsViewHolder(view);
                        return viewHolder;
                    }
                };

        postList.setAdapter(adapter);

        adapter.startListening();







    }

    public static class FindPostsViewHolder extends RecyclerView.ViewHolder
    {

        TextView first_name, last_name, post_body_text, post_date;


        public FindPostsViewHolder(@NonNull View itemView)
        {
            super(itemView);
            first_name = itemView.findViewById(R.id.post_first_name);
            last_name = itemView.findViewById(R.id.post_last_name);
            post_date = itemView.findViewById(R.id.post_date_and_time);
            post_body_text = itemView.findViewById(R.id.the_post);


        }
    }


----------------------------------------------

package com.example.updatedhapana1;

public class Posts
{

    public String first_name, last_name, post_body_text, post_date;


    //this is an empty contstructor- this is required//
    public Posts ()
    {

    }
    //this is an empty contstructor- this is required//



    public Posts(String first_name, String last_name, String post_body_text, String post_date) {
        this.first_name = first_name;
        this.last_name = last_name;
        this.post_body_text = post_body_text;
        this.post_date = post_date;
    }

    public String getFirst_name() {
        return first_name;
    }

    public void setFirst_name(String first_name) {
        this.first_name = first_name;
    }

    public String getLast_name() {
        return last_name;
    }

    public void setLast_name(String last_name) {
        this.last_name = last_name;
    }

    public String getPost_body_text() {
        return post_body_text;
    }

    public void setPost_body_text(String post_body_text) {
        this.post_body_text = post_body_text;
    }

    public String getPost_date() {
        return post_date;
    }

    public void setPost_date(String post_date) {
        this.post_date = post_date;
    }
}

Answer 1

Edit I figured out my issue. My recycler view items were not displaying because of how my data was structured in firebase. Thank you everyone for your help.

Answer 2

Remove this from your Recyclerview: android:layout_marginTop="700dp"". It has set the top margin 700dp which makes it go out of the screen.

Answer 3

I think it's your last FrameLayout where is height is match_parent and is overlapping everything. If it's not this layout try to replace others layout by wrap_content or when your run your app, you have "layout inspector" in Android Studio and you can find your error.

Answer 4

I haven't tested your code, but this is what I suspect. From your XML it seems like you have linear layout and recycler view in 2 separate components and your LinearLayout is match_parent. So I am assuming it's taking the entire space.