Minimum viable TimeZoneDetectorService

This is a do-nothing TimeZoneDetectorService that can be
populated in following commits. A temporary method has been
added so the service has one method.

Unit tests can be run with:

atest FrameworksServicesTests:TimeZoneDetectorServiceTest

Test: build / boot
Test: See above
Merged-In: I565fb5dd2f18b7aac2e5779d346bfe69e9da02af
Change-Id: I565fb5dd2f18b7aac2e5779d346bfe69e9da02af

4 files changed, 109 insertions, 0 deletions

diff --git a/core/java/android/app/SystemServiceRegistry.java b/core/java/android/app/SystemServiceRegistry.java
index aa1738dc1d97..26ea06854b89 100644
--- a/core/java/android/app/SystemServiceRegistry.java
+++ b/core/java/android/app/SystemServiceRegistry.java
@@ -24,6 +24,7 @@ import android.app.job.IJobScheduler;
 import android.app.job.JobScheduler;
 import android.app.timedetector.TimeDetector;
 import android.app.timezone.RulesManager;
+import android.app.timezonedetector.TimeZoneDetector;
 import android.app.trust.TrustManager;
 import android.app.usage.IStorageStatsManager;
 import android.app.usage.IUsageStatsManager;
@@ -914,6 +915,13 @@ final class SystemServiceRegistry {
                             throws ServiceNotFoundException {
                         return new TimeDetector();
                     }});
+        registerService(Context.TIME_ZONE_DETECTOR_SERVICE, TimeZoneDetector.class,
+                new CachedServiceFetcher<TimeZoneDetector>() {
+                    @Override
+                    public TimeZoneDetector createService(ContextImpl ctx)
+                            throws ServiceNotFoundException {
+                        return new TimeZoneDetector();
+                    }});
     }
 
     /**
diff --git a/core/java/android/app/timezonedetector/ITimeZoneDetectorService.aidl b/core/java/android/app/timezonedetector/ITimeZoneDetectorService.aidl
new file mode 100644
index 000000000000..ef2cbab137dc
--- /dev/null
+++ b/core/java/android/app/timezonedetector/ITimeZoneDetectorService.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2018 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.app.timezonedetector;
+
+/**
+ * System private API to comunicate with time zone detector service.
+ *
+ * <p>Used by parts of the Android system with signals associated with the device's time zone to
+ * provide information to the Time Zone Detector Service.
+ *
+ * <p>Use the {@link android.app.timezonedetector.TimeZoneDetector} class rather than going through
+ * this Binder interface directly. See {@link android.app.timezonedetector.TimeZoneDetectorService}
+ * for more complete documentation.
+ *
+ *
+ * {@hide}
+ */
+interface ITimeZoneDetectorService {
+  void stubbedCall();
+}
diff --git a/core/java/android/app/timezonedetector/TimeZoneDetector.java b/core/java/android/app/timezonedetector/TimeZoneDetector.java
new file mode 100644
index 000000000000..be3c7649a486
--- /dev/null
+++ b/core/java/android/app/timezonedetector/TimeZoneDetector.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2018 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.app.timezonedetector;
+
+import android.annotation.SystemService;
+import android.content.Context;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.ServiceManager.ServiceNotFoundException;
+import android.util.Log;
+
+/**
+ * The interface through which system components can send signals to the TimeZoneDetectorService.
+ * @hide
+ */
+@SystemService(Context.TIME_ZONE_DETECTOR_SERVICE)
+public final class TimeZoneDetector {
+
+    private static final String TAG = "timezonedetector.TimeZoneDetector";
+    private static final boolean DEBUG = false;
+
+    private final ITimeZoneDetectorService mITimeZoneDetectorService;
+
+    public TimeZoneDetector() throws ServiceNotFoundException {
+        mITimeZoneDetectorService = ITimeZoneDetectorService.Stub.asInterface(
+                ServiceManager.getServiceOrThrow(Context.TIME_ZONE_DETECTOR_SERVICE));
+
+    }
+    /**
+     * Does nothing.
+     * TODO: Remove this when the service implementation is built out.
+     */
+    public void stubbedCall() {
+        if (DEBUG) {
+            Log.d(TAG, "stubbedCall called");
+        }
+        try {
+            mITimeZoneDetectorService.stubbedCall();
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+}
diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index da3e7cb2f815..9c4767212c6c 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -3021,6 +3021,7 @@ public abstract class Context {
             //@hide: INCIDENT_SERVICE,
             COMPANION_DEVICE_SERVICE,
             //@hide: TIME_DETECTOR_SERVICE,
+            //@hide: TIME_ZONE_DETECTOR_SERVICE,
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface ServiceName {}
@@ -4107,6 +4108,15 @@ public abstract class Context {
     public static final String TIME_DETECTOR_SERVICE = "time_detector";
 
     /**
+     * Use with {@link #getSystemService(String)} to retrieve an
+     * {@link android.app.timezonedetector.ITimeZoneDetectorService}.
+     * @hide
+     *
+     * @see #getSystemService(String)
+     */
+    public static final String TIME_ZONE_DETECTOR_SERVICE = "time_zone_detector";
+
+    /**
      * Determine whether the given permission is allowed for a particular
      * process and user ID running in the system.
      *