1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15package android.support.v17.leanback.supportleanbackshowcase.utils; 16 17import android.util.SparseArray; 18import android.view.View; 19 20/** 21 * ResourceCache allows retrieving children from a given view and caches the resulting views in 22 * order to prevent future lookups. 23 */ 24public class ResourceCache { 25 26 private final SparseArray<View> mCachedViews = new SparseArray<View>(); 27 28 public <ViewType extends View> ViewType getViewById(View view, int resId) { 29 View child = mCachedViews.get(resId, null); 30 if (child == null) { 31 child = view.findViewById(resId); 32 mCachedViews.put(resId, child); 33 } 34 return (ViewType) child; 35 } 36} 37