Java tutorial
//package com.java2s; /* * Copyright (C) 2017, Megatron King * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ import android.content.res.Resources; import android.graphics.drawable.Drawable; import android.util.LongSparseArray; import java.lang.reflect.Field; public class Main { private static LongSparseArray<Drawable.ConstantState> hackPreloadDrawablesV18(Resources res) { try { Field field = Resources.class.getDeclaredField("sPreloadedDrawables"); field.setAccessible(true); return ((LongSparseArray<Drawable.ConstantState>[]) field.get(res))[0]; } catch (NoSuchFieldException e) { // ignore } catch (IllegalAccessException e) { // ignore } catch (IllegalArgumentException e) { // ignore } return null; } }