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 17package android.support.v4.content; 18 19import android.content.SharedPreferences; 20import android.support.annotation.NonNull; 21 22public final class SharedPreferencesCompat { 23 24 public final static class EditorCompat { 25 26 private static EditorCompat sInstance; 27 28 private static class Helper { 29 Helper() { 30 } 31 32 public void apply(@NonNull SharedPreferences.Editor editor) { 33 try { 34 editor.apply(); 35 } catch (AbstractMethodError unused) { 36 // The app injected its own pre-Gingerbread 37 // SharedPreferences.Editor implementation without 38 // an apply method. 39 editor.commit(); 40 } 41 } 42 } 43 44 private final Helper mHelper; 45 46 private EditorCompat() { 47 mHelper = new Helper(); 48 } 49 50 public static EditorCompat getInstance() { 51 if (sInstance == null) { 52 sInstance = new EditorCompat(); 53 } 54 return sInstance; 55 } 56 57 public void apply(@NonNull SharedPreferences.Editor editor) { 58 // Note that this redirection is needed to not break the public API chain 59 // of getInstance().apply() calls. Otherwise this method could (and should) 60 // be static. 61 mHelper.apply(editor); 62 } 63 } 64 65 private SharedPreferencesCompat() {} 66 67} 68