Myujth

I am struggling to populate my recycler view and I can't identify why. I trying to populate the view with data from Firebase Database, I can successfully get the data, but I can't figure out how to properly set up the recycler view, I am also using FirebaseUI. Here is my Activity containing the firebaseUI and database call:

public class LoggedInActivity extends AppCompatActivity 

private DatabaseReference mDatabase;

RecyclerView contentView;

private TextView mTextMessage;
 ImageButton positive;
 ImageButton balanced;
 ImageButton negative;

private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
 = new BottomNavigationView.OnNavigationItemSelectedListener() 

 @Override
 public boolean onNavigationItemSelected(@NonNull MenuItem item) 
 switch (item.getItemId()) 
 case R.id.navigation_home:
 mTextMessage.setText(R.string.title_home);

 return true;
 case R.id.navigation_dashboard:
 mTextMessage.setText(R.string.title_dashboard);

 return true;
 case R.id.navigation_notifications:
 mTextMessage.setText(R.string.title_notifications);

 return true;
 
 return false;
 
;

@Override
protected void onCreate(Bundle savedInstanceState) 
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_logged_in);

 positive = findViewById(R.id.heartButton);
 balanced = findViewById(R.id.balancedButton);
 negative = findViewById(R.id.negativeButton);

 mTextMessage = findViewById(R.id.message);
 mTextMessage.setTextColor(Color.WHITE);
 BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
 navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);

 mDatabase = FirebaseDatabase.getInstance().getReference();

 DatabaseReference mRef = mDatabase.child("posts");
 Query query = FirebaseDatabase.getInstance()
 .getReference()
 .child("posts")
 .limitToLast(50);

 query.addChildEventListener(new ChildEventListener() 
 @Override
 public void onChildAdded(DataSnapshot dataSnapshot, String prevChildKey) 
 Post newPost = dataSnapshot.getValue(Post.class);
 System.out.println("Title: " + newPost.title);
 System.out.println("Body: " + newPost.body);
 System.out.println("Previous Post ID: " + prevChildKey);
 

 @Override
 public void onChildChanged(DataSnapshot dataSnapshot, String prevChildKey) 

 @Override
 public void onChildRemoved(DataSnapshot dataSnapshot) 

 @Override
 public void onChildMoved(DataSnapshot dataSnapshot, String prevChildKey) 

 @Override
 public void onCancelled(DatabaseError databaseError) 
 );


 FirebaseRecyclerOptions<Post> options =
 new FirebaseRecyclerOptions.Builder<Post>()
 .setQuery(query, Post.class)
 .build();

 FirebaseRecyclerAdapter adapter = new FirebaseRecyclerAdapter<Post, PostHolder>(options) 
 @Override
 public PostHolder onCreateViewHolder(ViewGroup parent, int viewType) 
 // Create a new instance of the ViewHolder, in this case we are using a custom
 // layout called R.layout.message for each item
 View view = LayoutInflater.from(parent.getContext())
 .inflate(R.layout.post_content, parent, false);

 return new PostHolder(view);
 

 @Override
 protected void onBindViewHolder(PostHolder holder, int position, Post model) 
 // Bind the Chat object to the ChatHolder
 // ...
 holder.bind


 
 ;

 contentView = findViewById(R.id.recyclerView);
 contentView.setAdapter(adapter);

I also created my class for retrieving Posts from the database:

@IgnoreExtraProperties
public class Post 

public String title;
public String body;
public String username;

public Post() 
 // Default constructor required for calls to DataSnapshot.getValue(User.class)


public Post(String title, String body, String username) 
 title = title;
 body = body;
 username = username;


public String getTitle() return title; 

public String getBody() return body; 

public String getUsername() return username; 

I am just trying to get the post Title at the moment, I have made this custom holder:

public class PostHolder extends RecyclerView.ViewHolder 

TextView title;
TextView body;
TextView username;

public PostHolder(@NonNull View itemView) 
 super(itemView);
 title = (TextView) itemView.findViewById(R.id.title)

Here is where I think I run into the problem, I am not sure how I bind the Post data to get it to show up on this Label that I created as post_content.xml:

 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="10dp">

<TextView
 android:id="@+id/title"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:textSize="20sp"/>

 </LinearLayout>

I would appreciate an explanation on this system as I am finding it a bit confusing in regards to the custom holder, binding and inflating portions.
Where am I going wrong? Thank you.