1/*
2 * Copyright (C) 2011 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
17package com.android.email.activity;
18
19import android.app.Activity;
20import android.app.Fragment;
21
22/**
23 * Interface for {@link Activity} that can "install" fragments.
24 */
25public interface FragmentInstallable {
26    /**
27     * Called when a {@link Fragment} wants to be installed to the host activity.
28     *
29     * Fragments which use this MUST call this from {@link Fragment#onActivityCreated} using
30     * {@link UiUtilities#installFragment}.
31     *
32     * This means a host {@link Activity} can safely assume a passed {@link Fragment} is already
33     * created.
34     */
35    public void onInstallFragment(Fragment fragment);
36
37    /**
38     * Called when a {@link Fragment} wants to be uninstalled from the host activity.
39     *
40     * Fragments which use this MUST call this from {@link Fragment#onDestroyView} using
41     * {@link UiUtilities#uninstallFragment}.
42     */
43    public void onUninstallFragment(Fragment fragment);
44}
45