| /* |
| * Copyright (C) 2019 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.attention; |
| |
| import android.annotation.IntDef; |
| import android.annotation.NonNull; |
| import android.annotation.SystemApi; |
| import android.app.Service; |
| import android.content.Intent; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| |
| import com.android.internal.util.Preconditions; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| |
| /** |
| * Abstract base class for Attention service. |
| * |
| * <p> An attention service provides attention estimation related features to the system. |
| * The system's default AttentionService implementation is configured in |
| * {@code config_AttentionComponent}. If this config has no value, a stub is returned. |
| * |
| * See: {@link AttentionManagerService}. |
| * |
| * <pre> |
| * {@literal |
| * <service android:name=".YourAttentionService" |
| * android:permission="android.permission.BIND_ATTENTION_SERVICE"> |
| * </service>} |
| * </pre> |
| * |
| * @hide |
| */ |
| @SystemApi |
| public abstract class AttentionService extends Service { |
| /** |
| * 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_ATTENTION_SERVICE} |
| * permission so that other applications can not abuse it. |
| */ |
| public static final String SERVICE_INTERFACE = |
| "android.service.attention.AttentionService"; |
| |
| /** Attention is absent. */ |
| public static final int ATTENTION_SUCCESS_ABSENT = 0; |
| |
| /** Attention is present. */ |
| public static final int ATTENTION_SUCCESS_PRESENT = 1; |
| |
| /** Preempted by other camera user. */ |
| public static final int ATTENTION_FAILURE_PREEMPTED = 2; |
| |
| /** Preempted by other camera user. */ |
| public static final int ATTENTION_FAILURE_TIMED_OUT = 3; |
| |
| /** Unknown reasons for failing to determine the attention. */ |
| public static final int ATTENTION_FAILURE_UNKNOWN = 4; |
| |
| /** |
| * Result codes for when attention check was successful. |
| * |
| * @hide |
| */ |
| @IntDef(prefix = {"ATTENTION_SUCCESS_"}, value = {ATTENTION_SUCCESS_ABSENT, |
| ATTENTION_SUCCESS_PRESENT}) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface AttentionSuccessCodes { |
| } |
| |
| /** |
| * Result codes explaining why attention check was not successful. |
| * |
| * @hide |
| */ |
| @IntDef(prefix = {"ATTENTION_FAILURE_"}, value = {ATTENTION_FAILURE_PREEMPTED, |
| ATTENTION_FAILURE_TIMED_OUT, ATTENTION_FAILURE_UNKNOWN}) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface AttentionFailureCodes { |
| } |
| |
| private final IAttentionService.Stub mBinder = new IAttentionService.Stub() { |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void checkAttention(int requestCode, IAttentionCallback callback) { |
| Preconditions.checkNotNull(callback); |
| AttentionService.this.onCheckAttention(requestCode, new AttentionCallback(callback)); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void cancelAttentionCheck(int requestCode) { |
| AttentionService.this.onCancelAttentionCheck(requestCode); |
| } |
| }; |
| |
| @Override |
| public final IBinder onBind(Intent intent) { |
| if (SERVICE_INTERFACE.equals(intent.getAction())) { |
| return mBinder; |
| } |
| return null; |
| } |
| |
| /** |
| * Checks the user attention and calls into the provided callback. |
| * |
| * @param requestCode an identifier that could be used to cancel the request |
| * @param callback the callback to return the result to |
| */ |
| public abstract void onCheckAttention(int requestCode, @NonNull AttentionCallback callback); |
| |
| /** Cancels the attention check for a given request code. */ |
| public abstract void onCancelAttentionCheck(int requestCode); |
| |
| |
| /** Callbacks for AttentionService results. */ |
| public static final class AttentionCallback { |
| private final IAttentionCallback mCallback; |
| |
| private AttentionCallback(IAttentionCallback callback) { |
| mCallback = callback; |
| } |
| |
| /** Returns the result. */ |
| public void onSuccess(int requestCode, @AttentionSuccessCodes int result, long timestamp) { |
| try { |
| mCallback.onSuccess(requestCode, result, timestamp); |
| } catch (RemoteException e) { |
| e.rethrowFromSystemServer(); |
| } |
| } |
| |
| /** Signals a failure. */ |
| public void onFailure(int requestCode, @AttentionFailureCodes int error) { |
| try { |
| mCallback.onFailure(requestCode, error); |
| } catch (RemoteException e) { |
| e.rethrowFromSystemServer(); |
| } |
| } |
| } |
| } |