Equivalent of ListView.setEmptyView in RecyclerView

Question

In RecyclerView, I want to set an empty view to be shown when the adapter is empty. Is there an equivalent of ListView.setEmptyView()?

Answer 1

Here's a class similar to @dragon born's, but more complete. Based on this gist.

public class EmptyRecyclerView extends RecyclerView {     private View emptyView;     final private AdapterDataObserver observer = new AdapterDataObserver() {         @Override         public void onChanged() {             checkIfEmpty();         }          @Override         public void onItemRangeInserted(int positionStart, int itemCount) {             checkIfEmpty();         }          @Override         public void onItemRangeRemoved(int positionStart, int itemCount) {             checkIfEmpty();         }     };      public EmptyRecyclerView(Context context) {         super(context);     }      public EmptyRecyclerView(Context context, AttributeSet attrs) {         super(context, attrs);     }      public EmptyRecyclerView(Context context, AttributeSet attrs, int defStyle) {         super(context, attrs, defStyle);     }      void checkIfEmpty() {         if (emptyView != null && getAdapter() != null) {             final boolean emptyViewVisible = getAdapter().getItemCount() == 0;             emptyView.setVisibility(emptyViewVisible ? VISIBLE : GONE);             setVisibility(emptyViewVisible ? GONE : VISIBLE);         }     }      @Override     public void setAdapter(Adapter adapter) {         final Adapter oldAdapter = getAdapter();         if (oldAdapter != null) {             oldAdapter.unregisterAdapterDataObserver(observer);         }         super.setAdapter(adapter);         if (adapter != null) {             adapter.registerAdapterDataObserver(observer);         }          checkIfEmpty();     }      public void setEmptyView(View emptyView) {         this.emptyView = emptyView;         checkIfEmpty();     } }

Answer 2

With the new data binding feature you can also achieve this in your layout directly:

<TextView    android:text="No data to display."    android:visibility="@{dataset.size() > 0 ? View.GONE : View.VISIBLE}" /> 

In that case you just need to add a variable and an import to the data section of your XML:

<data> <import type="android.view.View"/> <variable     name="dataset"     type="java.util.List&lt;java.lang.String&gt;"     /> </data>