| /* |
| * Copyright (C) 2017 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 android.annotation.CallSuper; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.os.RemoteException; |
| import com.android.internal.os.HandlerCaller; |
| 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.ICancellationSignal; |
| import android.os.Looper; |
| import android.util.Log; |
| import android.view.autofill.AutofillManager; |
| |
| import com.android.internal.os.SomeArgs; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Top-level service of the current autofill service for a given user. |
| * |
| * <p>Apps providing autofill capabilities must extend this service. |
| */ |
| public abstract class AutofillService extends Service { |
| private static final String TAG = "AutofillService"; |
| |
| /** |
| * 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_AUTOFILL_SERVICE} permission so |
| * that other applications can not abuse it. |
| */ |
| @SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION) |
| public static final String SERVICE_INTERFACE = "android.service.autofill.AutofillService"; |
| |
| /** |
| * Name under which a AutoFillService component publishes information about itself. |
| * This meta-data should reference an XML resource containing a |
| * <code><{@link |
| * android.R.styleable#AutofillService autofill-service}></code> tag. |
| * This is a a sample XML file configuring an AutoFillService: |
| * <pre> <autofill-service |
| * android:settingsActivity="foo.bar.SettingsActivity" |
| * . . . |
| * /></pre> |
| */ |
| public static final String SERVICE_META_DATA = "android.autofill"; |
| |
| // Handler messages. |
| private static final int MSG_CONNECT = 1; |
| private static final int MSG_DISCONNECT = 2; |
| private static final int MSG_ON_FILL_REQUEST = 3; |
| private static final int MSG_ON_SAVE_REQUEST = 4; |
| |
| private final IAutoFillService mInterface = new IAutoFillService.Stub() { |
| @Override |
| public void onConnectedStateChanged(boolean connected) { |
| if (connected) { |
| mHandlerCaller.obtainMessage(MSG_CONNECT).sendToTarget(); |
| } else { |
| mHandlerCaller.obtainMessage(MSG_DISCONNECT).sendToTarget(); |
| } |
| } |
| |
| @Override |
| public void onFillRequest(FillRequest request, IFillCallback callback) { |
| ICancellationSignal transport = CancellationSignal.createTransport(); |
| try { |
| callback.onCancellable(transport); |
| } catch (RemoteException e) { |
| e.rethrowFromSystemServer(); |
| } |
| mHandlerCaller.obtainMessageOOO(MSG_ON_FILL_REQUEST, request, |
| CancellationSignal.fromTransport(transport), callback) |
| .sendToTarget(); |
| } |
| |
| @Override |
| public void onSaveRequest(SaveRequest request, ISaveCallback callback) { |
| mHandlerCaller.obtainMessageOO(MSG_ON_SAVE_REQUEST, request, |
| callback).sendToTarget(); |
| } |
| }; |
| |
| private final HandlerCaller.Callback mHandlerCallback = (msg) -> { |
| switch (msg.what) { |
| case MSG_CONNECT: { |
| onConnected(); |
| break; |
| } case MSG_ON_FILL_REQUEST: { |
| final SomeArgs args = (SomeArgs) msg.obj; |
| final FillRequest request = (FillRequest) args.arg1; |
| final CancellationSignal cancellation = (CancellationSignal) args.arg2; |
| final IFillCallback callback = (IFillCallback) args.arg3; |
| final FillCallback fillCallback = new FillCallback(callback, request.getId()); |
| args.recycle(); |
| // TODO(b/37563972): temporary try-catch hack to support old method |
| try { |
| onFillRequest(request, cancellation, fillCallback); |
| } catch (AbstractMethodError e) { |
| final List<FillContext> contexts = request.getFillContexts(); |
| onFillRequest(contexts.get(contexts.size() - 1).getStructure(), |
| request.getClientState(), request.getFlags(), cancellation, |
| fillCallback); |
| } |
| break; |
| } case MSG_ON_SAVE_REQUEST: { |
| final SomeArgs args = (SomeArgs) msg.obj; |
| final SaveRequest request = (SaveRequest) args.arg1; |
| final ISaveCallback callback = (ISaveCallback) args.arg2; |
| final SaveCallback saveCallback = new SaveCallback(callback); |
| args.recycle(); |
| // TODO(b/37563972): temporary try-catch hack to support old method |
| try { |
| onSaveRequest(request, saveCallback); |
| } catch (AbstractMethodError e) { |
| final List<FillContext> contexts = request.getFillContexts(); |
| onSaveRequest(contexts.get(contexts.size() - 1).getStructure(), |
| request.getClientState(), saveCallback); |
| } |
| 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()}. |
| */ |
| @CallSuper |
| @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() { |
| } |
| |
| /** |
| * Called by the Android system do decide if an {@link Activity} can be autofilled by the |
| * service. |
| * |
| * <p>Service must call one of the {@link FillCallback} methods (like |
| * {@link FillCallback#onSuccess(FillResponse)} |
| * or {@link FillCallback#onFailure(CharSequence)}) |
| * to notify the result of the request. |
| * |
| * @param request the {@link FillRequest request} to handle. |
| * See {@link FillResponse} for examples of multiple-sections requests. |
| * @param cancellationSignal signal for observing cancellation requests. The system will use |
| * this to notify you that the fill result is no longer needed and you should stop |
| * handling this fill request in order to save resources. |
| * @param callback object used to notify the result of the request. |
| */ |
| public abstract void onFillRequest(@NonNull FillRequest request, |
| @NonNull CancellationSignal cancellationSignal, @NonNull FillCallback callback); |
| |
| /** |
| * Called by the Android system do decide if an {@link Activity} can be autofilled by the |
| * service. |
| * |
| * <p>Service must call one of the {@link FillCallback} methods (like |
| * {@link FillCallback#onSuccess(FillResponse)} |
| * or {@link FillCallback#onFailure(CharSequence)}) |
| * to notify the result of the request. |
| * |
| * @param structure {@link Activity}'s view structure. |
| * @param data bundle containing data passed by the service in a last call to |
| * {@link FillResponse.Builder#setExtras(Bundle)}, if any. This bundle allows your |
| * service to keep state between fill and save requests as well as when filling different |
| * sections of the UI as the system will try to aggressively unbind from the service to |
| * conserve resources. |
| * See {@link FillResponse} for examples of multiple-sections requests. |
| * @param flags either {@code 0} or {@link AutofillManager#FLAG_MANUAL_REQUEST}. |
| * @param cancellationSignal signal for observing cancellation requests. The system will use |
| * this to notify you that the fill result is no longer needed and you should stop |
| * handling this fill request in order to save resources. |
| * @param callback object used to notify the result of the request. |
| * |
| * @hide |
| */ |
| @Deprecated |
| public void onFillRequest(@NonNull AssistStructure structure, @Nullable Bundle data, |
| int flags, @NonNull CancellationSignal cancellationSignal, |
| @NonNull FillCallback callback) { |
| |
| } |
| |
| /** |
| * Called when user requests service to save the fields of an {@link Activity}. |
| * |
| * <p>Service must call one of the {@link SaveCallback} methods (like |
| * {@link SaveCallback#onSuccess()} or {@link SaveCallback#onFailure(CharSequence)}) |
| * to notify the result of the request. |
| * |
| * @param request the {@link SaveRequest request} to handle. |
| * See {@link FillResponse} for examples of multiple-sections requests. |
| * @param callback object used to notify the result of the request. |
| */ |
| public abstract void onSaveRequest(@NonNull SaveRequest request, |
| @NonNull SaveCallback callback); |
| |
| /** |
| * Called when user requests service to save the fields of an {@link Activity}. |
| * |
| * <p>Service must call one of the {@link SaveCallback} methods (like |
| * {@link SaveCallback#onSuccess()} or {@link SaveCallback#onFailure(CharSequence)}) |
| * to notify the result of the request. |
| * |
| * @param structure {@link Activity}'s view structure. |
| * @param data bundle containing data passed by the service in a last call to |
| * {@link FillResponse.Builder#setExtras(Bundle)}, if any. This bundle allows your |
| * service to keep state between fill and save requests as well as when filling different |
| * sections of the UI as the system will try to aggressively unbind from the service to |
| * conserve resources. |
| * See {@link FillResponse} for examples of multiple-sections requests. |
| * @param callback object used to notify the result of the request. |
| * |
| * @hide |
| */ |
| @Deprecated |
| public void onSaveRequest(@NonNull AssistStructure structure, @Nullable Bundle data, |
| @NonNull SaveCallback callback) { |
| |
| } |
| |
| /** |
| * 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() { |
| } |
| |
| /** @hide */ |
| @Deprecated |
| public final void disableSelf() { |
| getSystemService(AutofillManager.class).disableOwnedAutofillServices(); |
| } |
| |
| /** |
| * Returns the {@link FillEventHistory.Event events} since the last {@link FillResponse} was |
| * returned. |
| * |
| * <p>The history is not persisted over reboots. |
| * |
| * @return The history or {@code null} if there are not events. |
| */ |
| @Nullable public final FillEventHistory getFillEventHistory() { |
| AutofillManager afm = getSystemService(AutofillManager.class); |
| |
| if (afm == null) { |
| return null; |
| } else { |
| return afm.getFillEventHistory(); |
| } |
| } |
| } |