1 /*
2  * Copyright (C) 2020 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.wallpaper.picker;
17 
18 /**
19  * An interface for a class to keep track of whether fragment transactions are safe to commit given
20  * the activity's current lifecycle state.
21  */
22 public interface FragmentTransactionChecker {
23     /**
24      * Checks if the fragment transactions are safe to commit
25      *
26      * @return {@code true} if it is safe; {@code false} otherwise.
27      */
isSafeToCommitFragmentTransaction()28     boolean isSafeToCommitFragmentTransaction();
29 }
30