| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * 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. |
| */ |
| package android.annotation; |
| |
| import static java.lang.annotation.ElementType.CONSTRUCTOR; |
| import static java.lang.annotation.ElementType.FIELD; |
| import static java.lang.annotation.ElementType.METHOD; |
| import static java.lang.annotation.ElementType.TYPE; |
| import static java.lang.annotation.RetentionPolicy.SOURCE; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.Target; |
| |
| /** |
| * Denotes that the annotated element requires one or more device features. This |
| * is used to auto-generate documentation. |
| * |
| * @hide |
| */ |
| @Retention(SOURCE) |
| @Target({TYPE,FIELD,METHOD,CONSTRUCTOR}) |
| public @interface RequiresFeature { |
| /** |
| * The name of the device feature that is required. |
| */ |
| String value(); |
| |
| /** |
| * Defines the name of the method that should be called to check whether the feature is |
| * available, using the same signature format as javadoc. The feature checking method can have |
| * multiple parameters, but the feature name parameter must be of type String and must also be |
| * the first String-type parameter. |
| * <p> |
| * By default, the enforcement is |
| * {@link android.content.pm.PackageManager#hasSystemFeature(String)}. |
| */ |
| String enforcement() default("android.content.pm.PackageManager#hasSystemFeature"); |
| } |