1 /*
2  * Copyright (C) 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.intentresolver.emptystate;
17 
18 import android.annotation.Nullable;
19 
20 import com.android.intentresolver.ResolverListAdapter;
21 
22 /**
23  * Returns an empty state to show for the current profile page (tab) if necessary.
24  * This could be used e.g. to show a blocker on a tab if device management policy doesn't
25  * allow to use it or there are no apps available.
26  */
27 public interface EmptyStateProvider {
28     /**
29      * When a non-null empty state is returned the corresponding profile page will show
30      * this empty state
31      * @param resolverListAdapter the current adapter
32      */
33     @Nullable
getEmptyState(ResolverListAdapter resolverListAdapter)34     default EmptyState getEmptyState(ResolverListAdapter resolverListAdapter) {
35         return null;
36     }
37 }
38