| /* |
| * 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 com.android.server.timedetector; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.app.timedetector.ITimeDetectorService; |
| import android.app.timedetector.ManualTimeSuggestion; |
| import android.app.timedetector.NetworkTimeSuggestion; |
| import android.app.timedetector.TelephonyTimeSuggestion; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.database.ContentObserver; |
| import android.os.Handler; |
| import android.provider.Settings; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.util.DumpUtils; |
| import com.android.server.FgThread; |
| import com.android.server.SystemService; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.Objects; |
| |
| /** |
| * The implementation of ITimeDetectorService.aidl. |
| */ |
| public final class TimeDetectorService extends ITimeDetectorService.Stub { |
| private static final String TAG = "TimeDetectorService"; |
| |
| public static class Lifecycle extends SystemService { |
| |
| public Lifecycle(@NonNull Context context) { |
| super(context); |
| } |
| |
| @Override |
| public void onStart() { |
| TimeDetectorService service = TimeDetectorService.create(getContext()); |
| |
| // Publish the binder service so it can be accessed from other (appropriately |
| // permissioned) processes. |
| publishBinderService(Context.TIME_DETECTOR_SERVICE, service); |
| } |
| } |
| |
| @NonNull private final Handler mHandler; |
| @NonNull private final Context mContext; |
| @NonNull private final TimeDetectorStrategy mTimeDetectorStrategy; |
| |
| private static TimeDetectorService create(@NonNull Context context) { |
| TimeDetectorStrategy timeDetectorStrategy = new TimeDetectorStrategyImpl(); |
| TimeDetectorStrategyCallbackImpl callback = new TimeDetectorStrategyCallbackImpl(context); |
| timeDetectorStrategy.initialize(callback); |
| |
| Handler handler = FgThread.getHandler(); |
| TimeDetectorService timeDetectorService = |
| new TimeDetectorService(context, handler, timeDetectorStrategy); |
| |
| // Wire up event listening. |
| ContentResolver contentResolver = context.getContentResolver(); |
| contentResolver.registerContentObserver( |
| Settings.Global.getUriFor(Settings.Global.AUTO_TIME), true, |
| new ContentObserver(handler) { |
| public void onChange(boolean selfChange) { |
| timeDetectorService.handleAutoTimeDetectionChanged(); |
| } |
| }); |
| |
| return timeDetectorService; |
| } |
| |
| @VisibleForTesting |
| public TimeDetectorService(@NonNull Context context, @NonNull Handler handler, |
| @NonNull TimeDetectorStrategy timeDetectorStrategy) { |
| mContext = Objects.requireNonNull(context); |
| mHandler = Objects.requireNonNull(handler); |
| mTimeDetectorStrategy = Objects.requireNonNull(timeDetectorStrategy); |
| } |
| |
| @Override |
| public void suggestTelephonyTime(@NonNull TelephonyTimeSuggestion timeSignal) { |
| enforceSuggestTelephonyTimePermission(); |
| Objects.requireNonNull(timeSignal); |
| |
| mHandler.post(() -> mTimeDetectorStrategy.suggestTelephonyTime(timeSignal)); |
| } |
| |
| @Override |
| public void suggestManualTime(@NonNull ManualTimeSuggestion timeSignal) { |
| enforceSuggestManualTimePermission(); |
| Objects.requireNonNull(timeSignal); |
| |
| mHandler.post(() -> mTimeDetectorStrategy.suggestManualTime(timeSignal)); |
| } |
| |
| @Override |
| public void suggestNetworkTime(@NonNull NetworkTimeSuggestion timeSignal) { |
| enforceSuggestNetworkTimePermission(); |
| Objects.requireNonNull(timeSignal); |
| |
| mHandler.post(() -> mTimeDetectorStrategy.suggestNetworkTime(timeSignal)); |
| } |
| |
| /** Internal method for handling the auto time setting being changed. */ |
| @VisibleForTesting |
| public void handleAutoTimeDetectionChanged() { |
| mHandler.post(mTimeDetectorStrategy::handleAutoTimeDetectionChanged); |
| } |
| |
| @Override |
| protected void dump(@NonNull FileDescriptor fd, @NonNull PrintWriter pw, |
| @Nullable String[] args) { |
| if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return; |
| |
| mTimeDetectorStrategy.dump(pw, args); |
| } |
| |
| private void enforceSuggestTelephonyTimePermission() { |
| mContext.enforceCallingPermission( |
| android.Manifest.permission.SUGGEST_TELEPHONY_TIME_AND_ZONE, |
| "suggest telephony time and time zone"); |
| } |
| |
| private void enforceSuggestManualTimePermission() { |
| mContext.enforceCallingOrSelfPermission( |
| android.Manifest.permission.SUGGEST_MANUAL_TIME_AND_ZONE, |
| "suggest manual time and time zone"); |
| } |
| |
| private void enforceSuggestNetworkTimePermission() { |
| mContext.enforceCallingOrSelfPermission( |
| android.Manifest.permission.SET_TIME, |
| "set time"); |
| } |
| } |