Adds automatic switching to Guest if user starts driving with the keyguard (edba98c1) · Commits · e / os / android_frameworks_base

packages/SystemUI/AndroidManifest.xml

+3 −0

Original line number	Diff line number	Diff line
		@@ -209,6 +209,9 @@
		<!-- to read and change hvac values in a car -->
		<uses-permission android:name="android.car.permission.CONTROL_CAR_CLIMATE" />

		<!-- to be able to detect the driving state in a car-->
		<uses-permission android:name="android.car.permission.CAR_DRIVING_STATE" />

		<!-- Permission necessary to change car audio volume through CarAudioManager -->
		<uses-permission android:name="android.car.permission.CAR_CONTROL_AUDIO_VOLUME" />

packages/SystemUI/res/values/integers_car.xml

+5 −0

Original line number	Diff line number	Diff line
		@@ -19,4 +19,9 @@
		<integer name="car_user_switcher_anim_cascade_delay_ms">27</integer>
		<!-- Full screen user switcher column number TODO: move to support library-->
		<integer name="user_fullscreen_switcher_num_col">3</integer>

		<!-- Number of milliseconds user can spend driving with the keyguard up. After that, we switch to Guest. -->
		<!-- If the number is negative, the feature is disabled.
		If it's zero, we switch to guest immediately as we start driving. -->
		<integer name="driving_on_keyguard_timeout_ms">30000</integer>
		</resources>

packages/SystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java

+27 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		package com.android.systemui.statusbar.car;

		import android.app.ActivityTaskManager;
		import android.car.drivingstate.CarDrivingStateEvent;
		import android.graphics.PixelFormat;
		import android.graphics.drawable.Drawable;
		import android.util.Log;
		@@ -82,6 +83,8 @@ public class CarStatusBar extends StatusBar implements
		private DeviceProvisionedController mDeviceProvisionedController;
		private boolean mDeviceIsProvisioned = true;
		private HvacController mHvacController;
		private DrivingStateHelper mDrivingStateHelper;
		private SwitchToGuestTimer mSwitchToGuestTimer;

		@Override
		public void start() {
		@@ -111,6 +114,12 @@ public class CarStatusBar extends StatusBar implements
		}
		});
		}

		// Register a listener for driving state changes.
		mDrivingStateHelper = new DrivingStateHelper(mContext, this::onDrivingStateChanged);
		mDrivingStateHelper.connectToCarService();

		mSwitchToGuestTimer = new SwitchToGuestTimer(mContext);
		}

		/**
		@@ -205,6 +214,7 @@ public class CarStatusBar extends StatusBar implements
		mCarBatteryController.stopListening();
		mConnectedDeviceSignalController.stopListening();
		mActivityManagerWrapper.unregisterTaskStackListener(mTaskStackListener);
		mDrivingStateHelper.disconnectFromCarService();

		if (mNavigationBarWindow != null) {
		mWindowManager.removeViewImmediate(mNavigationBarWindow);
		@@ -476,6 +486,20 @@ public class CarStatusBar extends StatusBar implements
		}
		}

		private void onDrivingStateChanged(CarDrivingStateEvent notUsed) {
		// Check if we need to start the timer every time driving state changes.
		startSwitchToGuestTimerIfDrivingOnKeyguard();
		}

		private void startSwitchToGuestTimerIfDrivingOnKeyguard() {
		if (mDrivingStateHelper.isCurrentlyDriving() && mState != StatusBarState.SHADE) {
		// We're driving while keyguard is up.
		mSwitchToGuestTimer.start();
		} else {
		mSwitchToGuestTimer.cancel();
		}
		}

		@Override
		protected void createUserSwitcher() {
		UserSwitcherController userSwitcherController =
		@@ -491,6 +515,9 @@ public class CarStatusBar extends StatusBar implements
		@Override
		public void onStateChanged(int newState) {
		super.onStateChanged(newState);

		startSwitchToGuestTimerIfDrivingOnKeyguard();

		if (mFullscreenUserSwitcher == null) {
		return; // Not using the full screen user switcher.
		}

packages/SystemUI/src/com/android/systemui/statusbar/car/DrivingStateHelper.java

0 → 100644

+127 −0

Original line number	Diff line number	Diff line
		/*
		* 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.systemui.statusbar.car;

		import android.car.Car;
		import android.car.CarNotConnectedException;
		import android.car.drivingstate.CarDrivingStateEvent;
		import android.car.drivingstate.CarDrivingStateManager;
		import android.car.drivingstate.CarDrivingStateManager.CarDrivingStateEventListener;
		import android.content.ComponentName;
		import android.content.Context;
		import android.content.ServiceConnection;
		import android.os.IBinder;
		import android.util.Log;

		import androidx.annotation.NonNull;

		/**
		* Helper class for connecting to the {@link CarDrivingStateManager} and listening for driving state
		* changes.
		*/
		public class DrivingStateHelper {
		public static final String TAG = "DrivingStateHelper";

		private final Context mContext;
		private CarDrivingStateManager mDrivingStateManager;
		private Car mCar;
		private CarDrivingStateEventListener mDrivingStateHandler;

		public DrivingStateHelper(Context context,
		@NonNull CarDrivingStateEventListener drivingStateHandler) {
		mContext = context;
		mDrivingStateHandler = drivingStateHandler;
		}

		/**
		* Queries {@link CarDrivingStateManager} for current driving state. Returns {@code true} if car
		* is idling or moving, {@code false} otherwise.
		*/
		public boolean isCurrentlyDriving() {
		try {
		CarDrivingStateEvent currentState = mDrivingStateManager.getCurrentCarDrivingState();
		if (currentState != null) {
		return currentState.eventValue == CarDrivingStateEvent.DRIVING_STATE_IDLING
		\|\| currentState.eventValue == CarDrivingStateEvent.DRIVING_STATE_MOVING;
		}
		} catch (CarNotConnectedException e) {
		Log.e(TAG, "Cannot determine current driving state. Car not connected", e);
		}

		return false; // Default to false.
		}

		/**
		* Establishes connection with the Car service.
		*/
		public void connectToCarService() {
		mCar = Car.createCar(mContext, mCarConnectionListener);
		if (mCar != null) {
		mCar.connect();
		}
		}

		/**
		* Disconnects from Car service and cleans up listeners.
		*/
		public void disconnectFromCarService() {
		if (mCar != null) {
		mCar.disconnect();
		}
		}

		private final ServiceConnection mCarConnectionListener =
		new ServiceConnection() {
		public void onServiceConnected(ComponentName name, IBinder service) {
		logD("Car Service connected");
		try {
		mDrivingStateManager = (CarDrivingStateManager) mCar.getCarManager(
		Car.CAR_DRIVING_STATE_SERVICE);
		if (mDrivingStateManager != null) {
		mDrivingStateManager.registerListener(mDrivingStateHandler);
		mDrivingStateHandler.onDrivingStateChanged(
		mDrivingStateManager.getCurrentCarDrivingState());
		} else {
		Log.e(TAG, "CarDrivingStateService service not available");
		}
		} catch (CarNotConnectedException e) {
		Log.e(TAG, "Car not connected", e);
		}
		}

		@Override
		public void onServiceDisconnected(ComponentName name) {
		destroyDrivingStateManager();
		}
		};

		private void destroyDrivingStateManager() {
		try {
		if (mDrivingStateManager != null) {
		mDrivingStateManager.unregisterListener();
		}
		} catch (CarNotConnectedException e) {
		Log.e(TAG, "Error unregistering listeners", e);
		}
		}

		private void logD(String message) {
		if (Log.isLoggable(TAG, Log.DEBUG)) {
		Log.d(TAG, message);
		}
		}
		}
		No newline at end of file

packages/SystemUI/src/com/android/systemui/statusbar/car/SwitchToGuestTimer.java

0 → 100644

+116 −0

Original line number	Diff line number	Diff line
		/*
		* 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.systemui.statusbar.car;

		import android.car.userlib.CarUserManagerHelper;
		import android.content.Context;
		import android.os.CountDownTimer;
		import android.util.Log;

		import com.android.systemui.R;

		import androidx.annotation.GuardedBy;

		/**
		* Wrapper for a countdown timer that switches to Guest if the user has been driving with
		* the keyguard up for configurable number of seconds.
		*/
		public class SwitchToGuestTimer {
		private static final String TAG = "SwitchToGuestTimer";

		// After how many ms CountdownTimer.onTick gets triggered.
		private static final int COUNTDOWN_INTERVAL_MS = 1000;

		private final CarUserManagerHelper mCarUserManagerHelper;
		private final Object mTimerLock;
		private final String mGuestName;
		private final int mTimeoutMs;
		private final boolean mEnabled;

		@GuardedBy("mTimerLock")
		private CountDownTimer mSwitchToGuestTimer;

		public SwitchToGuestTimer(Context context) {
		mCarUserManagerHelper = new CarUserManagerHelper(context);
		mGuestName = context.getResources().getString(R.string.car_guest);
		mTimeoutMs = context.getResources().getInteger(R.integer.driving_on_keyguard_timeout_ms);

		// Lock prevents multiple timers being started.
		mTimerLock = new Object();

		// If milliseconds to switch is a negative number, the feature is disabled.
		mEnabled = mTimeoutMs >= 0;
		}

		/**
		* Starts the timer if it's not already running.
		*/
		public void start() {
		if (!mEnabled) {
		logD("Switching to guest after driving on keyguard is disabled.");
		return;
		}

		synchronized (mTimerLock) {
		if (mSwitchToGuestTimer != null) {
		logD("Timer is already running.");
		return;
		}

		mSwitchToGuestTimer = new CountDownTimer(mTimeoutMs, COUNTDOWN_INTERVAL_MS) {
		@Override
		public void onTick(long msUntilFinished) {
		logD("Ms until switching to guest: " + Long.toString(msUntilFinished));
		}

		@Override
		public void onFinish() {
		mCarUserManagerHelper.startNewGuestSession(mGuestName);
		cancel();
		}
		};

		logI("Starting timer");
		mSwitchToGuestTimer.start();
		}
		}

		/**
		* Cancels the running timer.
		*/
		public void cancel() {
		synchronized (mTimerLock) {
		if (mSwitchToGuestTimer != null) {
		logI("Cancelling timer");
		mSwitchToGuestTimer.cancel();
		mSwitchToGuestTimer = null;
		}
		}
		}

		private void logD(String message) {
		if (Log.isLoggable(TAG, Log.DEBUG)) {
		Log.d(TAG, message);
		}
		}

		private void logI(String message) {
		if (Log.isLoggable(TAG, Log.INFO)) {
		Log.i(TAG, message);
		}
		}
		}