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 package androidx.annotation; 17 18 import static java.lang.annotation.ElementType.ANNOTATION_TYPE; 19 import static java.lang.annotation.ElementType.CONSTRUCTOR; 20 import static java.lang.annotation.ElementType.FIELD; 21 import static java.lang.annotation.ElementType.METHOD; 22 import static java.lang.annotation.ElementType.PACKAGE; 23 import static java.lang.annotation.ElementType.TYPE; 24 import static java.lang.annotation.RetentionPolicy.CLASS; 25 26 import java.lang.annotation.Retention; 27 import java.lang.annotation.Target; 28 29 /** 30 * Denotes that the annotated element should not be removed when 31 * the code is minified at build time. This is typically used 32 * on methods and classes that are accessed only via reflection 33 * so a compiler may think that the code is unused. 34 * <p> 35 * Example: 36 * <pre><code> 37 * @Keep 38 * public void foo() { 39 * ... 40 * } 41 * </code></pre> 42 */ 43 @Retention(CLASS) 44 @Target({PACKAGE,TYPE,ANNOTATION_TYPE,CONSTRUCTOR,METHOD,FIELD}) 45 public @interface Keep { 46 } 47