1 /* 2 * Copyright (C) 2010 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 android.os; 18 19 import android.annotation.NonNull; 20 import android.annotation.Nullable; 21 import android.annotation.SystemApi; 22 import android.annotation.TestApi; 23 24 /** 25 * @hide 26 */ 27 @SystemApi 28 @TestApi 29 public final class RemoteCallback implements Parcelable { 30 31 public interface OnResultListener { onResult(@ullable Bundle result)32 void onResult(@Nullable Bundle result); 33 } 34 35 private final OnResultListener mListener; 36 private final Handler mHandler; 37 private final IRemoteCallback mCallback; 38 RemoteCallback(OnResultListener listener)39 public RemoteCallback(OnResultListener listener) { 40 this(listener, null); 41 } 42 RemoteCallback(@onNull OnResultListener listener, @Nullable Handler handler)43 public RemoteCallback(@NonNull OnResultListener listener, @Nullable Handler handler) { 44 if (listener == null) { 45 throw new NullPointerException("listener cannot be null"); 46 } 47 mListener = listener; 48 mHandler = handler; 49 mCallback = new IRemoteCallback.Stub() { 50 @Override 51 public void sendResult(Bundle data) { 52 RemoteCallback.this.sendResult(data); 53 } 54 }; 55 } 56 RemoteCallback(Parcel parcel)57 RemoteCallback(Parcel parcel) { 58 mListener = null; 59 mHandler = null; 60 mCallback = IRemoteCallback.Stub.asInterface( 61 parcel.readStrongBinder()); 62 } 63 sendResult(@ullable final Bundle result)64 public void sendResult(@Nullable final Bundle result) { 65 // Do local dispatch 66 if (mListener != null) { 67 if (mHandler != null) { 68 mHandler.post(new Runnable() { 69 @Override 70 public void run() { 71 mListener.onResult(result); 72 } 73 }); 74 } else { 75 mListener.onResult(result); 76 } 77 // Do remote dispatch 78 } else { 79 try { 80 mCallback.sendResult(result); 81 } catch (RemoteException e) { 82 /* ignore */ 83 } 84 } 85 } 86 87 @Override describeContents()88 public int describeContents() { 89 return 0; 90 } 91 92 @Override writeToParcel(Parcel parcel, int flags)93 public void writeToParcel(Parcel parcel, int flags) { 94 parcel.writeStrongBinder(mCallback.asBinder()); 95 } 96 97 public static final @android.annotation.NonNull Parcelable.Creator<RemoteCallback> CREATOR 98 = new Parcelable.Creator<RemoteCallback>() { 99 public RemoteCallback createFromParcel(Parcel parcel) { 100 return new RemoteCallback(parcel); 101 } 102 103 public RemoteCallback[] newArray(int size) { 104 return new RemoteCallback[size]; 105 } 106 }; 107 } 108