Last active
August 29, 2015 14:23
-
-
Save lukaville/b372bfea8168dfdd2903 to your computer and use it in GitHub Desktop.
Empty RecyclerView
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
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(); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment