| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package android.service.autofill; |
| |
| import static android.service.voice.VoiceInteractionSession.KEY_FLAGS; |
| import static android.service.voice.VoiceInteractionSession.KEY_STRUCTURE; |
| import static android.view.View.ASSIST_FLAG_SANITIZED_TEXT; |
| import static android.view.View.ASSIST_FLAG_NON_SANITIZED_TEXT; |
| |
| import android.annotation.SdkConstant; |
| import android.app.Activity; |
| import android.app.Service; |
| import android.app.assist.AssistStructure; |
| import android.content.Intent; |
| import android.os.Bundle; |
| import android.os.CancellationSignal; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import com.android.internal.os.HandlerCaller; |
| import com.android.internal.os.IResultReceiver; |
| import com.android.internal.os.SomeArgs; |
| |
| // TODO(b/33197203): improve javadoc (class and methods) |
| |
| /** |
| * Top-level service of the current auto-fill service for a given user. |
| * |
| * <p>Apps providing auto-fill capabilities must extend this service. |
| */ |
| public abstract class AutoFillService extends Service { |
| |
| static final String TAG = "AutoFillService"; |
| static final boolean DEBUG = true; // TODO: set to false once stable |
| |
| /** |
| * The {@link Intent} that must be declared as handled by the service. |
| * To be supported, the service must also require the |
| * {@link android.Manifest.permission#BIND_AUTO_FILL} permission so |
| * that other applications can not abuse it. |
| */ |
| @SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION) |
| public static final String SERVICE_INTERFACE = "android.service.autofill.AutoFillService"; |
| |
| // Bundle keys. |
| /** @hide */ |
| public static final String KEY_CALLBACK = "callback"; |
| |
| // Handler messages. |
| private static final int MSG_CONNECT = 1; |
| private static final int MSG_AUTO_FILL_ACTIVITY = 2; |
| private static final int MSG_DISCONNECT = 3; |
| |
| private final IResultReceiver mAssistReceiver = new IResultReceiver.Stub() { |
| @Override |
| public void send(int resultCode, Bundle resultData) throws RemoteException { |
| final AssistStructure structure = resultData.getParcelable(KEY_STRUCTURE); |
| final IBinder binder = resultData.getBinder(KEY_CALLBACK); |
| final int flags = resultData.getInt(KEY_FLAGS, 0); |
| |
| mHandlerCaller |
| .obtainMessageIOO(MSG_AUTO_FILL_ACTIVITY, flags, structure, binder).sendToTarget(); |
| } |
| |
| }; |
| |
| private final IAutoFillService mInterface = new IAutoFillService.Stub() { |
| @Override |
| public void onConnected() { |
| mHandlerCaller.sendMessage(mHandlerCaller.obtainMessage(MSG_CONNECT)); |
| } |
| |
| @Override |
| public IResultReceiver getAssistReceiver() { |
| return mAssistReceiver; |
| } |
| |
| @Override |
| public void onDisconnected() { |
| mHandlerCaller.sendMessage(mHandlerCaller.obtainMessage(MSG_DISCONNECT)); |
| } |
| }; |
| |
| private final HandlerCaller.Callback mHandlerCallback = new HandlerCaller.Callback() { |
| |
| @Override |
| public void executeMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_CONNECT: { |
| onConnected(); |
| break; |
| } case MSG_AUTO_FILL_ACTIVITY: { |
| final SomeArgs args = (SomeArgs) msg.obj; |
| final AssistStructure structure = (AssistStructure) args.arg1; |
| final IBinder binder = (IBinder) args.arg2; |
| final int flags = msg.arg1; |
| requestAutoFill(structure, flags, binder); |
| break; |
| } case MSG_DISCONNECT: { |
| onDisconnected(); |
| break; |
| } default: { |
| Log.w(TAG, "MyCallbacks received invalid message type: " + msg); |
| } |
| } |
| } |
| }; |
| |
| private HandlerCaller mHandlerCaller; |
| |
| /** |
| * {@inheritDoc} |
| * |
| * <strong>NOTE: </strong>if overridden, it must call {@code super.onCreate()}. |
| */ |
| @Override |
| public void onCreate() { |
| super.onCreate(); |
| |
| mHandlerCaller = new HandlerCaller(null, Looper.getMainLooper(), mHandlerCallback, true); |
| } |
| |
| @Override |
| public final IBinder onBind(Intent intent) { |
| if (SERVICE_INTERFACE.equals(intent.getAction())) { |
| return mInterface.asBinder(); |
| } |
| Log.w(TAG, "Tried to bind to wrong intent: " + intent); |
| return null; |
| } |
| |
| /** |
| * Called when the Android System connects to service. |
| * |
| * <p>You should generally do initialization here rather than in {@link #onCreate}. |
| */ |
| public void onConnected() { |
| if (DEBUG) Log.d(TAG, "onConnected()"); |
| } |
| |
| /** |
| * Called when user requests service to auto-fill an {@link Activity}. |
| * |
| * @param structure {@link Activity}'s view structure . |
| * @param data bundle with optional parameters (currently none) which is passed along on |
| * subsequent calls (so it can be used by the service to share data). |
| * @param cancellationSignal signal for observing cancel requests. |
| */ |
| public abstract void onFillRequest(AssistStructure structure, |
| Bundle data, CancellationSignal cancellationSignal, FillCallback callback); |
| |
| /** |
| * Called when user requests service to save the fields of an {@link Activity}. |
| * |
| * @param structure {@link Activity}'s view structure. |
| * @param data same bundle passed to |
| * {@link #onFillRequest(AssistStructure, Bundle, CancellationSignal, FillCallback)}; |
| * might also contain with optional parameters (currently none). |
| * @param cancellationSignal signal for observing cancel requests. |
| * @param callback object used to notify the result of the request. |
| */ |
| public abstract void onSaveRequest(AssistStructure structure, |
| Bundle data, CancellationSignal cancellationSignal, SaveCallback callback); |
| |
| private void requestAutoFill(AssistStructure structure, int flags, IBinder binder) { |
| // TODO(b/33197203): pass the Bundle received from mAssistReceiver instead? |
| final Bundle data = new Bundle(); |
| switch (flags) { |
| case ASSIST_FLAG_SANITIZED_TEXT: |
| final FillCallback fillCallback = new FillCallback(binder); |
| // TODO(b/33197203): hook up the cancelationSignal |
| onFillRequest(structure, data, new CancellationSignal(), fillCallback); |
| break; |
| case ASSIST_FLAG_NON_SANITIZED_TEXT: |
| final SaveCallback saveCallback = new SaveCallback(binder); |
| // TODO(b/33197203): hook up the cancelationSignal |
| onSaveRequest(structure, null, new CancellationSignal(), saveCallback); |
| break; |
| default: |
| Log.w(TAG, "invalid flag on requestAutoFill(): " + flags); |
| } |
| } |
| |
| /** |
| * Called when the Android System disconnects from the service. |
| * |
| * <p> At this point this service may no longer be an active {@link AutoFillService}. |
| */ |
| public void onDisconnected() { |
| if (DEBUG) Log.d(TAG, "onDisconnected()"); |
| } |
| } |