RecyclerView doesn't have an emptyView support, we gotta fix that

EmptyRecyclerView.java

/*
 * Copyright (C) 2015 Glowworm Software
 * Copyright (C) 2014 Nizamutdinov Adel
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// based on https://gist.github.com/adelnizamutdinov/31c8f054d1af4588dc5c

package mobi.glowworm.lib.ui.widget;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.View;

public class EmptyRecyclerView extends RecyclerView {

    @Nullable
    private View emptyView;

    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);
    }

    @Override
    public void setAdapter(@Nullable Adapter adapter) {
        final Adapter oldAdapter = getAdapter();
        if (oldAdapter != null) {
            oldAdapter.unregisterAdapterDataObserver(observer);
        }

        if (adapter != null) {
            adapter.registerAdapterDataObserver(observer);
        }
        super.setAdapter(adapter);
        checkIfEmpty();
    }

    @Override
    public void swapAdapter(Adapter adapter, boolean removeAndRecycleExistingViews) {
        final Adapter oldAdapter = getAdapter();
        if (oldAdapter != null) {
            oldAdapter.unregisterAdapterDataObserver(observer);
        }

        if (adapter != null) {
            adapter.registerAdapterDataObserver(observer);
        }
        super.swapAdapter(adapter, removeAndRecycleExistingViews);
        checkIfEmpty();
    }

    @NonNull
    private final AdapterDataObserver observer = new AdapterDataObserver() {
        @Override
        public void onChanged() {
            super.onChanged();
            checkIfEmpty();
        }

        @Override
        public void onItemRangeInserted(int positionStart, int itemCount) {
            super.onItemRangeInserted(positionStart, itemCount);
            checkIfEmpty();
        }

        @Override
        public void onItemRangeRemoved(int positionStart, int itemCount) {
            super.onItemRangeRemoved(positionStart, itemCount);
            checkIfEmpty();
        }
    };

    /**
     * Indicates the view to be shown when the adapter for this object is empty
     *
     * @param emptyView
     */
    public void setEmptyView(@Nullable View emptyView) {
        if (this.emptyView != null) {
            this.emptyView.setVisibility(GONE);
        }

        this.emptyView = emptyView;
        checkIfEmpty();
    }

    /**
     * Check adapter item count and toggle visibility of empty view if the adapter is empty
     */
    private void checkIfEmpty() {
        if (emptyView == null || getAdapter() == null) {
            return;
        }

        if (getAdapter().getItemCount() > 0) {
            emptyView.setVisibility(GONE);
        } else {
            emptyView.setVisibility(VISIBLE);
        }
    }

}

original gist at https://gist.github.com/adelnizamutdinov/31c8f054d1af4588dc5c

Hi,

I've try to use this but i cant. When list is empty, nothing show!

Look at my code
http://pastebin.com/rZnr4F2A

I have the same :(

I have the same problem
demo is here → https://pastebin.com/018ZBxXR

EmptyRecyclerView does not come with a built in "empty view".

To use it you need to create a view that you want to display when the list is empty, and assign it by calling EmptyRecyclerView.setEmptyView(View).

I normally create a view in the same layout file that the EmptyRecyclerView is in.

If anyone has trouble with it not displaying the "empty view", I would love to know more details about the issue. It could be that runtime view creation has something to do with the problem. Try adding the view to the same xml layout file as this EmptyRecyclerView.

I've used this in production apps for a few years now with no issues - but if problems are experienced I would like to fix them.

@Spotik @rusmichal @f839903061 in case you were ever able to figure out what the problem was, or have any time to help?