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.app; 18 19import android.os.Build; 20import android.os.Bundle; 21import android.os.IBinder; 22import android.util.Log; 23 24import java.lang.reflect.InvocationTargetException; 25import java.lang.reflect.Method; 26 27/** 28 * Helper for accessing features in {@link Bundle} in a backwards compatible fashion. 29 */ 30public final class BundleCompat { 31 32 static class BundleCompatBaseImpl { 33 private static final String TAG = "BundleCompatBaseImpl"; 34 35 private static Method sGetIBinderMethod; 36 private static boolean sGetIBinderMethodFetched; 37 38 private static Method sPutIBinderMethod; 39 private static boolean sPutIBinderMethodFetched; 40 41 public static IBinder getBinder(Bundle bundle, String key) { 42 if (!sGetIBinderMethodFetched) { 43 try { 44 sGetIBinderMethod = Bundle.class.getMethod("getIBinder", String.class); 45 sGetIBinderMethod.setAccessible(true); 46 } catch (NoSuchMethodException e) { 47 Log.i(TAG, "Failed to retrieve getIBinder method", e); 48 } 49 sGetIBinderMethodFetched = true; 50 } 51 52 if (sGetIBinderMethod != null) { 53 try { 54 return (IBinder) sGetIBinderMethod.invoke(bundle, key); 55 } catch (InvocationTargetException | IllegalAccessException 56 | IllegalArgumentException e) { 57 Log.i(TAG, "Failed to invoke getIBinder via reflection", e); 58 sGetIBinderMethod = null; 59 } 60 } 61 return null; 62 } 63 64 public static void putBinder(Bundle bundle, String key, IBinder binder) { 65 if (!sPutIBinderMethodFetched) { 66 try { 67 sPutIBinderMethod = 68 Bundle.class.getMethod("putIBinder", String.class, IBinder.class); 69 sPutIBinderMethod.setAccessible(true); 70 } catch (NoSuchMethodException e) { 71 Log.i(TAG, "Failed to retrieve putIBinder method", e); 72 } 73 sPutIBinderMethodFetched = true; 74 } 75 76 if (sPutIBinderMethod != null) { 77 try { 78 sPutIBinderMethod.invoke(bundle, key, binder); 79 } catch (InvocationTargetException | IllegalAccessException 80 | IllegalArgumentException e) { 81 Log.i(TAG, "Failed to invoke putIBinder via reflection", e); 82 sPutIBinderMethod = null; 83 } 84 } 85 } 86 } 87 88 private BundleCompat() {} 89 90 /** 91 * A convenience method to handle getting an {@link IBinder} inside a {@link Bundle} for all 92 * Android versions. 93 * @param bundle The bundle to get the {@link IBinder}. 94 * @param key The key to use while getting the {@link IBinder}. 95 * @return The {@link IBinder} that was obtained. 96 */ 97 public static IBinder getBinder(Bundle bundle, String key) { 98 if (Build.VERSION.SDK_INT >= 18) { 99 return bundle.getBinder(key); 100 } else { 101 return BundleCompatBaseImpl.getBinder(bundle, key); 102 } 103 } 104 105 /** 106 * A convenience method to handle putting an {@link IBinder} inside a {@link Bundle} for all 107 * Android versions. 108 * @param bundle The bundle to insert the {@link IBinder}. 109 * @param key The key to use while putting the {@link IBinder}. 110 * @param binder The {@link IBinder} to put. 111 */ 112 public static void putBinder(Bundle bundle, String key, IBinder binder) { 113 if (Build.VERSION.SDK_INT >= 18) { 114 bundle.putBinder(key, binder); 115 } else { 116 BundleCompatBaseImpl.putBinder(bundle, key, binder); 117 } 118 } 119} 120