1 /* 2 * Copyright (C) 2014 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.launcher3.compat; 18 19 import android.annotation.TargetApi; 20 import android.content.Context; 21 import android.os.Build; 22 import android.os.UserManager; 23 24 import com.android.launcher3.util.LongArrayMap; 25 26 import java.util.HashMap; 27 28 @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1) 29 public class UserManagerCompatV17 extends UserManagerCompatV16 { 30 31 protected LongArrayMap<UserHandleCompat> mUsers; 32 // Create a separate reverse map as LongArrayMap.indexOfValue checks if objects are same 33 // and not {@link Object#equals} 34 protected HashMap<UserHandleCompat, Long> mUserToSerialMap; 35 36 protected UserManager mUserManager; 37 38 UserManagerCompatV17(Context context) { 39 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 40 } 41 42 public long getSerialNumberForUser(UserHandleCompat user) { 43 synchronized (this) { 44 if (mUserToSerialMap != null) { 45 Long serial = mUserToSerialMap.get(user); 46 return serial == null ? 0 : serial; 47 } 48 } 49 return mUserManager.getSerialNumberForUser(user.getUser()); 50 } 51 52 public UserHandleCompat getUserForSerialNumber(long serialNumber) { 53 synchronized (this) { 54 if (mUsers != null) { 55 return mUsers.get(serialNumber); 56 } 57 } 58 return UserHandleCompat.fromUser(mUserManager.getUserForSerialNumber(serialNumber)); 59 } 60 61 @Override 62 public void enableAndResetCache() { 63 synchronized (this) { 64 mUsers = new LongArrayMap<>(); 65 mUserToSerialMap = new HashMap<>(); 66 UserHandleCompat myUser = UserHandleCompat.myUserHandle(); 67 long serial = mUserManager.getSerialNumberForUser(myUser.getUser()); 68 mUsers.put(serial, myUser); 69 mUserToSerialMap.put(myUser, serial); 70 } 71 } 72 } 73 74
