1 /*
2  * Copyright (C) 2015 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.messaging.ui;
17 
18 import android.view.View;
19 import android.view.ViewGroup;
20 
21 /**
22  * Holds reusable View(s) for a {@link FixedViewPagerAdapter} to display a page. By using
23  * reusable Views inside ViewPagers this allows us to get rid of nested fragments and the messy
24  * activity lifecycle problems they entail.
25  */
26 public interface PagerViewHolder extends PersistentInstanceState {
27     /** Instructs the pager to clean up any view related resources
28      * @return the destroyed View so that the adapter may remove it from the container, or
29      * null if no View has been created. */
destroyView()30     View destroyView();
31 
32     /** @return The view that presents the page view to the user */
getView(ViewGroup container)33     View getView(ViewGroup container);
34 }
35