Recyclerview not call onCreateViewHolder

Question

My RecyclerView does not call onCreateViewHolder, onBindViewHolder even MenuViewHolder constructor, therefore nothing app

Answer 1

Your getItemCount method returns 0. So RecyclerView never tries to instantiate a view. Make it return something greater than 0.

for example

@Override
public int getItemCount() {
    return data.size();
}

Answer 2

Please do the following thing

@Override
public int getItemCount() {
    return data.size();
}

Answer 3

recyclerView.setAdapter(adapter); called The recyclerView list is populated by calling the method.

Answer 4

Another one is make sure you set layout manager to RecyclerView:

recycler.setLayoutManager(new LinearLayoutManager(this));

Answer 5

In my case after changing Activity to use ViewModel and DataBinding, I had forgotten to remove setContentView method calling from onCreate method. By removing it my problem solved.

Answer 6

Make sure your XML and Koltin/Java code match. In my case, I had a problem with the ViewHolder since I had written:

var txt: AppCompatTextView = itemView.findViewById(R.id.txt)

But since my XML code is:

<TextView
        android:id="@+id/txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        .../>

I had to change the privious row into:

var txt: TextView = itemView.findViewById(R.id.txt)

In addition, I also had to remove:

recyclerView.setHasFixedSize(true);

I hope this can help you :)