1 /* 2 * Copyright (C) 2014 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 com.android.ex.chips; 18 19 /** 20 * Used by the {@link com.android.ex.chips.BaseRecipientAdapter} to handle fetching 21 * photos from external sources and caching them for faster lookup later. 22 */ 23 public interface PhotoManager { 24 25 /** The number of photos cached in this Adapter. */ 26 public static final int PHOTO_CACHE_SIZE = 20; 27 28 /** 29 * Sets the {@link com.android.ex.chips.RecipientEntry}'s photo bytes. If the photo bytes 30 * are cached, this action happens immediately. Otherwise, the work to fetch the photo 31 * bytes is performed asynchronously before setting the value on the UI thread.<p/> 32 * 33 * If the photo bytes were fetched asynchronously, 34 * {@link PhotoManagerCallback#onPhotoBytesAsynchronouslyPopulated()} is called. This 35 * method is not called if the photo bytes have been cached previously (because no 36 * asynchronous work was performed). In that case, 37 * {@link PhotoManagerCallback#onPhotoBytesPopulated()} is called. 38 */ 39 void populatePhotoBytesAsync(RecipientEntry entry, PhotoManagerCallback callback); 40 41 interface PhotoManagerCallback { 42 void onPhotoBytesPopulated(); 43 void onPhotoBytesAsynchronouslyPopulated(); 44 void onPhotoBytesAsyncLoadFailed(); 45 } 46 } 47
