mirror of https://github.com/nextcloud/android
105 lines
3.1 KiB
Java
105 lines
3.1 KiB
Java
/*
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* Nextcloud - Android Client
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*
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* SPDX-FileCopyrightText: 2018 Tobias Kaminsky <tobias@kaminsky.me>
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* SPDX-FileCopyrightText: 2018 Nextcloud GmbH
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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package com.owncloud.android.ui;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.View;
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import androidx.annotation.Nullable;
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import androidx.recyclerview.widget.RecyclerView;
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/**
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* Extends RecyclerView to show a custom view if no data is available Inspired by http://alexzh.com/tutorials/how-to-setemptyview-to-recyclerview
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*/
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public class EmptyRecyclerView extends RecyclerView {
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private View mEmptyView;
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private boolean hasFooter = false;
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public EmptyRecyclerView(Context context) {
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super(context);
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}
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public EmptyRecyclerView(Context context, @Nullable AttributeSet attrs) {
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super(context, attrs);
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}
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public EmptyRecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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}
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@Override
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public void setAdapter(Adapter adapter) {
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Adapter oldAdapter = getAdapter();
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super.setAdapter(adapter);
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if (oldAdapter != null) {
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oldAdapter.unregisterAdapterDataObserver(observer);
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}
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if (adapter != null) {
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adapter.registerAdapterDataObserver(observer);
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}
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}
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public void setEmptyView(View view) {
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this.mEmptyView = view;
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initEmptyView();
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}
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private void initEmptyView() {
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if (mEmptyView != null) {
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int emptyCount = hasFooter ? 1 : 0;
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boolean empty = getAdapter() == null || getAdapter().getItemCount() == emptyCount;
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mEmptyView.setVisibility(empty ? VISIBLE : GONE);
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mEmptyView.setFocusable(false);
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this.setVisibility(empty ? GONE : VISIBLE);
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}
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}
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private final AdapterDataObserver observer = new AdapterDataObserver() {
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@Override
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public void onChanged() {
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super.onChanged();
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initEmptyView();
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}
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@Override
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public void onItemRangeChanged(int positionStart, int itemCount) {
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super.onItemRangeChanged(positionStart, itemCount);
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initEmptyView();
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}
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@Override
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public void onItemRangeChanged(int positionStart, int itemCount, @Nullable Object payload) {
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super.onItemRangeChanged(positionStart, itemCount, payload);
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initEmptyView();
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}
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@Override
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public void onItemRangeMoved(int fromPosition, int toPosition, int itemCount) {
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super.onItemRangeMoved(fromPosition, toPosition, itemCount);
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initEmptyView();
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}
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@Override
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public void onItemRangeInserted(int positionStart, int itemCount) {
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super.onItemRangeInserted(positionStart, itemCount);
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initEmptyView();
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}
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@Override
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public void onItemRangeRemoved(int positionStart, int itemCount) {
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super.onItemRangeRemoved(positionStart, itemCount);
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initEmptyView();
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}
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};
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public void setHasFooter(boolean bool) {
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hasFooter = bool;
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}
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}
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