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.content.Context; 22 import android.os.Bundle; 23 import android.view.View; 24 25 /** 26 * Callbacks to a {@link Fragment}'s container. 27 */ 28 public 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 onFindViewById(@dRes int id)34 public abstract <T extends View> T onFindViewById(@IdRes int id); 35 36 /** 37 * Return {@code true} if the container holds any view. 38 */ onHasView()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 */ instantiate(Context context, String className, Bundle arguments)48 public Fragment instantiate(Context context, String className, Bundle arguments) { 49 return Fragment.instantiate(context, className, arguments); 50 } 51 } 52