1 /* 2 * Copyright (C) 2021 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.permission.compat; 18 19 import android.annotation.UserIdInt; 20 import android.os.UserHandle; 21 22 /** 23 * Helper for accessing features in {@link UserHandle}. 24 */ 25 public final class UserHandleCompat { 26 /** 27 * A user ID to indicate all users on the device. 28 */ 29 public static final int USER_ALL = UserHandle.ALL.getIdentifier(); 30 31 /** 32 * A user ID to indicate the "system" user of the device. 33 */ 34 public static final int USER_SYSTEM = UserHandle.SYSTEM.getIdentifier(); 35 UserHandleCompat()36 private UserHandleCompat() {} 37 38 /** 39 * Get the user ID of a given UID. 40 * 41 * @param uid the UID 42 * @return the user ID 43 */ 44 @UserIdInt getUserId(int uid)45 public static int getUserId(int uid) { 46 return UserHandle.getUserHandleForUid(uid).getIdentifier(); 47 } 48 } 49