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
17package android.app;
18
19import android.annotation.IdRes;
20import android.annotation.Nullable;
21import android.content.Context;
22import android.os.Bundle;
23import android.view.View;
24
25/**
26 * Callbacks to a {@link Fragment}'s container.
27 */
28public abstract class FragmentContainer {
29    /**
30     * Return the view with the given resource ID. May return {@code null} if the
31     * view is not a child of this container.
32     */
33    @Nullable
34    public abstract <T extends View> T onFindViewById(@IdRes int id);
35
36    /**
37     * Return {@code true} if the container holds any view.
38     */
39    public abstract boolean onHasView();
40
41    /**
42     * Creates an instance of the specified fragment, can be overridden to construct fragments
43     * with dependencies, or change the fragment being constructed. By default just calls
44     * {@link Fragment#instantiate(Context, String, Bundle)}.
45     *
46     * @hide
47     */
48    public Fragment instantiate(Context context, String className, Bundle arguments) {
49        return Fragment.instantiate(context, className, arguments);
50    }
51}
52