Separated FUL functionality from LockPatternKeyguardView (9431366e) · Commits · e / os / android_frameworks_base

policy/src/com/android/internal/policy/impl/FaceUnlock.java

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		/*
		* Copyright (C) 2011 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.internal.policy.impl;

		import com.android.internal.R;
		import com.android.internal.policy.IFaceLockCallback;
		import com.android.internal.policy.IFaceLockInterface;
		import com.android.internal.widget.LockPatternUtils;

		import android.content.ComponentName;
		import android.content.Context;
		import android.content.Intent;
		import android.content.ServiceConnection;
		import android.os.Handler;
		import android.os.IBinder;
		import android.os.Message;
		import android.os.RemoteException;
		import android.telephony.TelephonyManager;
		import android.util.Log;
		import android.view.View;

		public class FaceUnlock implements Handler.Callback {

		private static final boolean DEBUG = false;
		private static final String TAG = "FULLockscreen";

		private final Context mContext;
		private final KeyguardUpdateMonitor mUpdateMonitor;

		private IFaceLockInterface mService;
		private boolean mBoundToService = false;
		private View mAreaView;

		private Handler mHandler;
		private final int MSG_SHOW_AREA_VIEW = 0;
		private final int MSG_HIDE_AREA_VIEW = 1;

		private boolean mServiceRunning = false;
		private final Object mServiceRunningLock = new Object();

		// Long enough to stay visible while dialer comes up
		// Short enough to not be visible if the user goes back immediately
		private final int VIEW_AREA_EMERGENCY_DIALER_TIMEOUT = 1000;

		// Long enough to stay visible while the service starts
		// Short enough to not have to wait long for backup if service fails to start or crashes
		// The service can take a couple of seconds to start on the first try after boot
		private final int VIEW_AREA_SERVICE_TIMEOUT = 3000;

		// So the user has a consistent amount of time when brought to the backup method from FaceLock
		private final int BACKUP_LOCK_TIMEOUT = 5000;

		/**
		* Used to lookup the state of the lock pattern
		*/
		private final LockPatternUtils mLockPatternUtils;

		KeyguardScreenCallback mKeyguardScreenCallback;

		public FaceUnlock(Context context, KeyguardUpdateMonitor updateMonitor,
		LockPatternUtils lockPatternUtils, KeyguardScreenCallback keyguardScreenCallback) {
		mContext = context;
		mUpdateMonitor = updateMonitor;
		mLockPatternUtils = lockPatternUtils;
		mKeyguardScreenCallback = keyguardScreenCallback;
		mHandler = new Handler(this);
		}

		public void cleanUp() {
		if (mService != null) {
		try {
		mService.unregisterCallback(mFaceLockCallback);
		} catch (RemoteException e) {
		// Not much we can do
		}
		stop();
		mService = null;
		}
		}

		/** When screen is turned on and focused, need to bind to FaceLock service if we are using
		* FaceLock, but only if we're not dealing with a call
		*/
		public void activateIfAble(boolean hasOverlay) {
		final boolean tooManyFaceUnlockTries = mUpdateMonitor.getMaxFaceUnlockAttemptsReached();
		final int failedBackupAttempts = mUpdateMonitor.getFailedAttempts();
		final boolean backupIsTimedOut =
		(failedBackupAttempts >= LockPatternUtils.FAILED_ATTEMPTS_BEFORE_TIMEOUT);
		if (tooManyFaceUnlockTries) Log.i(TAG, "tooManyFaceUnlockTries: " + tooManyFaceUnlockTries);
		if (mUpdateMonitor.getPhoneState() == TelephonyManager.CALL_STATE_IDLE
		&& installedAndSelected()
		&& !hasOverlay
		&& !tooManyFaceUnlockTries
		&& !backupIsTimedOut) {
		bind();

		// Show FaceLock area, but only for a little bit so lockpattern will become visible if
		// FaceLock fails to start or crashes
		showAreaWithTimeout(VIEW_AREA_SERVICE_TIMEOUT);

		// When switching between portrait and landscape view while FaceLock is running, the
		// screen will eventually go dark unless we poke the wakelock when FaceLock is
		// restarted
		mKeyguardScreenCallback.pokeWakelock();
		} else {
		hideArea();
		}
		}

		public boolean isServiceRunning() {
		return mServiceRunning;
		}

		public int viewAreaEmergencyDialerTimeout() {
		return VIEW_AREA_EMERGENCY_DIALER_TIMEOUT;
		}

		// Indicates whether FaceLock is in use
		public boolean installedAndSelected() {
		return (mLockPatternUtils.usingBiometricWeak() &&
		mLockPatternUtils.isBiometricWeakInstalled());
		}

		// Takes care of FaceLock area when layout is created
		public void initializeAreaView(View view) {
		if (installedAndSelected()) {
		mAreaView = view.findViewById(R.id.faceLockAreaView);
		if (mAreaView == null) {
		Log.e(TAG, "Layout does not have areaView and FaceLock is enabled");
		}
		} else {
		mAreaView = null; // Set to null if not using FaceLock
		}
		}

		// Stops FaceLock if it is running and reports back whether it was running or not
		public boolean stopIfRunning() {
		if (installedAndSelected() && mBoundToService) {
		stopAndUnbind();
		return true;
		}
		return false;
		}

		// Handles covering or exposing FaceLock area on the client side when FaceLock starts or stops
		// This needs to be done in a handler because the call could be coming from a callback from the
		// FaceLock service that is in a thread that can't modify the UI
		@Override
		public boolean handleMessage(Message msg) {
		switch (msg.what) {
		case MSG_SHOW_AREA_VIEW:
		if (mAreaView != null) {
		mAreaView.setVisibility(View.VISIBLE);
		}
		break;
		case MSG_HIDE_AREA_VIEW:
		if (mAreaView != null) {
		mAreaView.setVisibility(View.INVISIBLE);
		}
		break;
		default:
		Log.w(TAG, "Unhandled message");
		return false;
		}
		return true;
		}

		// Removes show and hide messages from the message queue
		private void removeAreaDisplayMessages() {
		mHandler.removeMessages(MSG_SHOW_AREA_VIEW);
		mHandler.removeMessages(MSG_HIDE_AREA_VIEW);
		}

		// Shows the FaceLock area immediately
		public void showArea() {
		// Remove messages to prevent a delayed hide message from undo-ing the show
		removeAreaDisplayMessages();
		mHandler.sendEmptyMessage(MSG_SHOW_AREA_VIEW);
		}

		// Hides the FaceLock area immediately
		public void hideArea() {
		// Remove messages to prevent a delayed show message from undo-ing the hide
		removeAreaDisplayMessages();
		mHandler.sendEmptyMessage(MSG_HIDE_AREA_VIEW);
		}

		// Shows the FaceLock area for a period of time
		public void showAreaWithTimeout(long timeoutMillis) {
		showArea();
		mHandler.sendEmptyMessageDelayed(MSG_HIDE_AREA_VIEW, timeoutMillis);
		}

		// Binds to FaceLock service. This call does not tell it to start, but it causes the service
		// to call the onServiceConnected callback, which then starts FaceLock.
		public void bind() {
		if (installedAndSelected()) {
		if (!mBoundToService) {
		if (DEBUG) Log.d(TAG, "before bind to FaceLock service");
		mContext.bindService(new Intent(IFaceLockInterface.class.getName()),
		mConnection,
		Context.BIND_AUTO_CREATE);
		if (DEBUG) Log.d(TAG, "after bind to FaceLock service");
		mBoundToService = true;
		} else {
		Log.w(TAG, "Attempt to bind to FaceLock when already bound");
		}
		}
		}

		// Tells FaceLock to stop and then unbinds from the FaceLock service
		public void stopAndUnbind() {
		if (installedAndSelected()) {
		stop();

		if (mBoundToService) {
		if (DEBUG) Log.d(TAG, "before unbind from FaceLock service");
		if (mService != null) {
		try {
		mService.unregisterCallback(mFaceLockCallback);
		} catch (RemoteException e) {
		// Not much we can do
		}
		}
		mContext.unbindService(mConnection);
		if (DEBUG) Log.d(TAG, "after unbind from FaceLock service");
		mBoundToService = false;
		} else {
		// This is usually not an error when this happens. Sometimes we will tell it to
		// unbind multiple times because it's called from both onWindowFocusChanged and
		// onDetachedFromWindow.
		if (DEBUG) Log.d(TAG, "Attempt to unbind from FaceLock when not bound");
		}
		}
		}

		private ServiceConnection mConnection = new ServiceConnection() {
		// Completes connection, registers callback and starts FaceLock when service is bound
		@Override
		public void onServiceConnected(ComponentName className, IBinder iservice) {
		mService = IFaceLockInterface.Stub.asInterface(iservice);
		if (DEBUG) Log.d(TAG, "Connected to FaceLock service");
		try {
		mService.registerCallback(mFaceLockCallback);
		} catch (RemoteException e) {
		Log.e(TAG, "Caught exception connecting to FaceLock: " + e.toString());
		mService = null;
		mBoundToService = false;
		return;
		}

		if (mAreaView != null) {
		int[] position;
		position = new int[2];
		mAreaView.getLocationInWindow(position);
		start(mAreaView.getWindowToken(), position[0], position[1],
		mAreaView.getWidth(), mAreaView.getHeight());
		}
		}

		// Cleans up if FaceLock service unexpectedly disconnects
		@Override
		public void onServiceDisconnected(ComponentName className) {
		synchronized(mServiceRunningLock) {
		mService = null;
		mServiceRunning = false;
		}
		mBoundToService = false;
		Log.w(TAG, "Unexpected disconnect from FaceLock service");
		}
		};

		// Tells the FaceLock service to start displaying its UI and perform recognition
		public void start(IBinder windowToken, int x, int y, int w, int h) {
		if (installedAndSelected()) {
		synchronized (mServiceRunningLock) {
		if (!mServiceRunning) {
		if (DEBUG) Log.d(TAG, "Starting FaceLock");
		try {
		mService.startUi(windowToken, x, y, w, h);
		} catch (RemoteException e) {
		Log.e(TAG, "Caught exception starting FaceLock: " + e.toString());
		return;
		}
		mServiceRunning = true;
		} else {
		if (DEBUG) Log.w(TAG, "start() attempted while running");
		}
		}
		}
		}

		// Tells the FaceLock service to stop displaying its UI and stop recognition
		public void stop() {
		if (installedAndSelected()) {
		// Note that attempting to stop FaceLock when it's not running is not an issue.
		// FaceLock can return, which stops it and then we try to stop it when the
		// screen is turned off. That's why we check.
		synchronized (mServiceRunningLock) {
		if (mServiceRunning) {
		try {
		if (DEBUG) Log.d(TAG, "Stopping FaceLock");
		mService.stopUi();
		} catch (RemoteException e) {
		Log.e(TAG, "Caught exception stopping FaceLock: " + e.toString());
		}
		mServiceRunning = false;
		}
		}
		}
		}

		// Implements the FaceLock service callback interface defined in AIDL
		private final IFaceLockCallback mFaceLockCallback = new IFaceLockCallback.Stub() {
		// Stops the FaceLock UI and indicates that the phone should be unlocked
		@Override
		public void unlock() {
		if (DEBUG) Log.d(TAG, "FaceLock unlock()");
		showArea(); // Keep fallback covered
		stopAndUnbind();

		mKeyguardScreenCallback.keyguardDone(true);
		mKeyguardScreenCallback.reportSuccessfulUnlockAttempt();
		}

		// Stops the FaceLock UI and exposes the backup method without unlocking
		// This means the user has cancelled out
		@Override
		public void cancel() {
		if (DEBUG) Log.d(TAG, "FaceLock cancel()");
		hideArea(); // Expose fallback
		stopAndUnbind();
		mKeyguardScreenCallback.pokeWakelock(BACKUP_LOCK_TIMEOUT);
		}

		// Stops the FaceLock UI and exposes the backup method without unlocking
		// This means FaceLock failed to recognize them
		@Override
		public void reportFailedAttempt() {
		if (DEBUG) Log.d(TAG, "FaceLock reportFailedAttempt()");
		mUpdateMonitor.reportFailedFaceUnlockAttempt();
		hideArea(); // Expose fallback
		stopAndUnbind();
		mKeyguardScreenCallback.pokeWakelock(BACKUP_LOCK_TIMEOUT);
		}

		// Removes the black area that covers the backup unlock method
		@Override
		public void exposeFallback() {
		if (DEBUG) Log.d(TAG, "FaceLock exposeFallback()");
		hideArea(); // Expose fallback
		}

		// Allows the Face Unlock service to poke the wake lock to keep the lockscreen alive
		@Override
		public void pokeWakelock() {
		if (DEBUG) Log.d(TAG, "FaceLock pokeWakelock()");
		mKeyguardScreenCallback.pokeWakelock();
		}
		};
		}

policy/src/com/android/internal/policy/impl/LockPatternKeyguardView.java

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