1/* 2 * Copyright (C) 2017 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 com.android.server.am; 18 19import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM; 20import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME; 21 22import android.app.IAssistDataReceiver; 23import android.graphics.Bitmap; 24import android.os.Binder; 25import android.os.Bundle; 26import android.os.RemoteException; 27import android.util.Log; 28 29import com.android.server.am.AssistDataRequester.AssistDataRequesterCallbacks; 30 31/** 32 * Proxies assist data to the given receiver, skipping all callbacks if the receiver dies. 33 */ 34class AssistDataReceiverProxy implements AssistDataRequesterCallbacks, 35 Binder.DeathRecipient { 36 37 private static final String TAG = TAG_WITH_CLASS_NAME ? "AssistDataReceiverProxy" : TAG_AM; 38 39 private String mCallerPackage; 40 private IAssistDataReceiver mReceiver; 41 42 public AssistDataReceiverProxy(IAssistDataReceiver receiver, String callerPackage) { 43 mReceiver = receiver; 44 mCallerPackage = callerPackage; 45 linkToDeath(); 46 } 47 48 @Override 49 public boolean canHandleReceivedAssistDataLocked() { 50 // We are forwarding, so we can always receive this data 51 return true; 52 } 53 54 @Override 55 public void onAssistDataReceivedLocked(Bundle data, int activityIndex, int activityCount) { 56 if (mReceiver != null) { 57 try { 58 mReceiver.onHandleAssistData(data); 59 } catch (RemoteException e) { 60 Log.w(TAG, "Failed to proxy assist data to receiver in package=" 61 + mCallerPackage, e); 62 } 63 } 64 } 65 66 @Override 67 public void onAssistScreenshotReceivedLocked(Bitmap screenshot) { 68 if (mReceiver != null) { 69 try { 70 mReceiver.onHandleAssistScreenshot(screenshot); 71 } catch (RemoteException e) { 72 Log.w(TAG, "Failed to proxy assist screenshot to receiver in package=" 73 + mCallerPackage, e); 74 } 75 } 76 } 77 78 @Override 79 public void onAssistRequestCompleted() { 80 unlinkToDeath(); 81 } 82 83 @Override 84 public void binderDied() { 85 unlinkToDeath(); 86 } 87 88 private void linkToDeath() { 89 try { 90 mReceiver.asBinder().linkToDeath(this, 0); 91 } catch (RemoteException e) { 92 Log.w(TAG, "Could not link to client death", e); 93 } 94 } 95 96 private void unlinkToDeath() { 97 if (mReceiver != null) { 98 mReceiver.asBinder().unlinkToDeath(this, 0); 99 } 100 mReceiver = null; 101 } 102}