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 17 package android.app; 18 19 import android.annotation.IdRes; 20 import android.annotation.Nullable; 21 import android.view.View; 22 23 /** 24 * Callbacks to a {@link Fragment}'s container. 25 */ 26 public abstract class FragmentContainer { 27 /** 28 * Return the view with the given resource ID. May return {@code null} if the 29 * view is not a child of this container. 30 */ 31 @Nullable onFindViewById(@dRes int id)32 public abstract View onFindViewById(@IdRes int id); 33 34 /** 35 * Return {@code true} if the container holds any view. 36 */ onHasView()37 public abstract boolean onHasView(); 38 } 39