| /* |
| * Copyright (C) 2016 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.incallui.answer.impl.classifier; |
| |
| import android.content.Context; |
| import android.hardware.Sensor; |
| import android.hardware.SensorEvent; |
| import android.hardware.SensorEventListener; |
| import android.hardware.SensorManager; |
| import android.os.PowerManager; |
| import android.view.MotionEvent; |
| import android.view.accessibility.AccessibilityManager; |
| |
| /** |
| * When the phone is locked, listens to touch, sensor and phone events and sends them to |
| * HumanInteractionClassifier to determine if touches are coming from a human. |
| */ |
| public class FalsingManager implements SensorEventListener { |
| private static final int[] CLASSIFIER_SENSORS = |
| new int[] { |
| Sensor.TYPE_PROXIMITY, |
| }; |
| |
| private final SensorManager mSensorManager; |
| private final HumanInteractionClassifier mHumanInteractionClassifier; |
| private final AccessibilityManager mAccessibilityManager; |
| |
| private boolean mSessionActive = false; |
| private boolean mScreenOn; |
| |
| public FalsingManager(Context context) { |
| mSensorManager = context.getSystemService(SensorManager.class); |
| mAccessibilityManager = context.getSystemService(AccessibilityManager.class); |
| mHumanInteractionClassifier = new HumanInteractionClassifier(context); |
| mScreenOn = context.getSystemService(PowerManager.class).isInteractive(); |
| } |
| |
| /** Returns {@code true} iff the FalsingManager is enabled and able to classify touches */ |
| public boolean isEnabled() { |
| return mHumanInteractionClassifier.isEnabled(); |
| } |
| |
| /** |
| * Returns {@code true} iff the classifier determined that this is not a human interacting with |
| * the phone. |
| */ |
| public boolean isFalseTouch() { |
| // Touch exploration triggers false positives in the classifier and |
| // already sufficiently prevents false unlocks. |
| return !mAccessibilityManager.isTouchExplorationEnabled() |
| && mHumanInteractionClassifier.isFalseTouch(); |
| } |
| |
| /** |
| * Should be called when the screen turns on and the related Views become visible. This will start |
| * tracking changes if the manager is enabled. |
| */ |
| public void onScreenOn() { |
| mScreenOn = true; |
| sessionEntrypoint(); |
| } |
| |
| /** |
| * Should be called when the screen turns off or the related Views are no longer visible. This |
| * will cause the manager to stop tracking changes. |
| */ |
| public void onScreenOff() { |
| mScreenOn = false; |
| sessionExitpoint(); |
| } |
| |
| /** |
| * Should be called when a new touch event has been received and should be classified. |
| * |
| * @param event MotionEvent to be classified as human or false. |
| */ |
| public void onTouchEvent(MotionEvent event) { |
| if (mSessionActive) { |
| mHumanInteractionClassifier.onTouchEvent(event); |
| } |
| } |
| |
| @Override |
| public synchronized void onSensorChanged(SensorEvent event) { |
| mHumanInteractionClassifier.onSensorChanged(event); |
| } |
| |
| @Override |
| public void onAccuracyChanged(Sensor sensor, int accuracy) {} |
| |
| private boolean shouldSessionBeActive() { |
| return isEnabled() && mScreenOn; |
| } |
| |
| private boolean sessionEntrypoint() { |
| if (!mSessionActive && shouldSessionBeActive()) { |
| onSessionStart(); |
| return true; |
| } |
| return false; |
| } |
| |
| private void sessionExitpoint() { |
| if (mSessionActive && !shouldSessionBeActive()) { |
| mSessionActive = false; |
| mSensorManager.unregisterListener(this); |
| } |
| } |
| |
| private void onSessionStart() { |
| mSessionActive = true; |
| |
| if (mHumanInteractionClassifier.isEnabled()) { |
| registerSensors(CLASSIFIER_SENSORS); |
| } |
| } |
| |
| private void registerSensors(int[] sensors) { |
| for (int sensorType : sensors) { |
| Sensor s = mSensorManager.getDefaultSensor(sensorType); |
| if (s != null) { |
| mSensorManager.registerListener(this, s, SensorManager.SENSOR_DELAY_GAME); |
| } |
| } |
| } |
| } |