1 /* 2 * Copyright (C) 2017 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.wallpaper.picker; 17 18 import androidx.annotation.Nullable; 19 20 /** 21 * Interface for a class which presents (in UI) a collection of wallpapers. 22 */ 23 public interface WallpapersUiContainer { 24 /** 25 * Notifies the container that wallpapers are ready to display. 26 */ onWallpapersReady()27 void onWallpapersReady(); 28 29 /** 30 * Returns the {@link CategoryFragment} used by this container to display wallpaper 31 * categories, or {@code null} if none is available. 32 */ 33 @Nullable getCategoryFragment()34 CategoryFragment getCategoryFragment(); 35 36 /** 37 * Notifies the container that categories have been fetched. 38 */ doneFetchingCategories()39 void doneFetchingCategories(); 40 } 41