Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License |
| 15 | */ |
| 16 | |
| 17 | package com.android.systemui.classifier; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.database.ContentObserver; |
| 21 | import android.hardware.SensorEvent; |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 22 | import android.os.Handler; |
| 23 | import android.os.UserHandle; |
| 24 | import android.provider.Settings; |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 25 | import android.util.DisplayMetrics; |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 26 | import android.util.Log; |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 27 | import android.view.MotionEvent; |
| 28 | |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 29 | import java.util.ArrayDeque; |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 30 | import java.util.ArrayList; |
| 31 | |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 32 | /** |
| 33 | * An classifier trying to determine whether it is a human interacting with the phone or not. |
| 34 | */ |
| 35 | public class HumanInteractionClassifier extends Classifier { |
| 36 | private static final String HIC_ENABLE = "HIC_enable"; |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 37 | private static final float FINGER_DISTANCE = 0.1f; |
Adrian Roos | 5c42df1 | 2016-01-27 08:48:42 -0800 | [diff] [blame] | 38 | |
| 39 | /** Default value for the HIC_ENABLE setting: 1 - enabled, 0 - disabled */ |
| 40 | private static final int HIC_ENABLE_DEFAULT = 1; |
| 41 | |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 42 | private static HumanInteractionClassifier sInstance = null; |
| 43 | |
| 44 | private final Handler mHandler = new Handler(); |
| 45 | private final Context mContext; |
| 46 | |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 47 | private final StrokeClassifier[] mStrokeClassifiers; |
| 48 | private final GestureClassifier[] mGestureClassifiers; |
| 49 | private final ArrayDeque<MotionEvent> mBufferedEvents = new ArrayDeque<>(); |
| 50 | private final HistoryEvaluator mHistoryEvaluator; |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 51 | private final float mDpi; |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 52 | |
Blazej Magnowski | 52af6b6 | 2015-09-30 15:46:17 -0700 | [diff] [blame] | 53 | private boolean mEnableClassifier = false; |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 54 | private int mCurrentType = Classifier.GENERIC; |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 55 | |
| 56 | protected final ContentObserver mSettingsObserver = new ContentObserver(mHandler) { |
| 57 | @Override |
| 58 | public void onChange(boolean selfChange) { |
| 59 | updateConfiguration(); |
| 60 | } |
| 61 | }; |
| 62 | |
| 63 | private HumanInteractionClassifier(Context context) { |
| 64 | mContext = context; |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 65 | DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics(); |
| 66 | |
| 67 | // If the phone is rotated to landscape, the calculations would be wrong if xdpi and ydpi |
| 68 | // were to be used separately. Due negligible differences in xdpi and ydpi we can just |
| 69 | // take the average. |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 70 | // TODO: make this respect DPI changes. |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 71 | mDpi = (displayMetrics.xdpi + displayMetrics.ydpi) / 2.0f; |
| 72 | mClassifierData = new ClassifierData(mDpi); |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 73 | mHistoryEvaluator = new HistoryEvaluator(); |
| 74 | |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 75 | mStrokeClassifiers = new StrokeClassifier[]{ |
| 76 | new AnglesClassifier(mClassifierData), |
| 77 | new SpeedClassifier(mClassifierData), |
| 78 | new DurationCountClassifier(mClassifierData), |
| 79 | new EndPointRatioClassifier(mClassifierData), |
| 80 | new EndPointLengthClassifier(mClassifierData), |
| 81 | new AccelerationClassifier(mClassifierData), |
| 82 | new SpeedAnglesClassifier(mClassifierData), |
| 83 | new LengthCountClassifier(mClassifierData), |
| 84 | new DirectionClassifier(mClassifierData), |
| 85 | }; |
Blazej Magnowski | 68d0c9b | 2015-09-18 17:25:55 -0700 | [diff] [blame] | 86 | |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 87 | mGestureClassifiers = new GestureClassifier[] { |
| 88 | new PointerCountClassifier(mClassifierData), |
| 89 | new ProximityClassifier(mClassifierData) |
| 90 | }; |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 91 | |
| 92 | mContext.getContentResolver().registerContentObserver( |
| 93 | Settings.Global.getUriFor(HIC_ENABLE), false, |
| 94 | mSettingsObserver, |
| 95 | UserHandle.USER_ALL); |
| 96 | |
| 97 | updateConfiguration(); |
| 98 | } |
| 99 | |
| 100 | public static HumanInteractionClassifier getInstance(Context context) { |
| 101 | if (sInstance == null) { |
| 102 | sInstance = new HumanInteractionClassifier(context); |
| 103 | } |
| 104 | return sInstance; |
| 105 | } |
| 106 | |
| 107 | private void updateConfiguration() { |
Adrian Roos | 5c42df1 | 2016-01-27 08:48:42 -0800 | [diff] [blame] | 108 | mEnableClassifier = 0 != Settings.Global.getInt( |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 109 | mContext.getContentResolver(), |
Adrian Roos | 5c42df1 | 2016-01-27 08:48:42 -0800 | [diff] [blame] | 110 | HIC_ENABLE, HIC_ENABLE_DEFAULT); |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 111 | } |
| 112 | |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 113 | public void setType(int type) { |
| 114 | mCurrentType = type; |
| 115 | } |
| 116 | |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 117 | @Override |
| 118 | public void onTouchEvent(MotionEvent event) { |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 119 | if (!mEnableClassifier) { |
| 120 | return; |
| 121 | } |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 122 | |
Adrian Roos | c5584ce | 2016-02-24 14:17:19 -0800 | [diff] [blame] | 123 | // If the user is dragging down the notification, they might want to drag it down |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 124 | // enough to see the content, read it for a while and then lift the finger to open |
| 125 | // the notification. This kind of motion scores very bad in the Classifier so the |
| 126 | // MotionEvents which are close to the current position of the finger are not |
| 127 | // sent to the classifiers until the finger moves far enough. When the finger if lifted |
| 128 | // up, the last MotionEvent which was far enough from the finger is set as the final |
| 129 | // MotionEvent and sent to the Classifiers. |
| 130 | if (mCurrentType == Classifier.NOTIFICATION_DRAG_DOWN) { |
| 131 | mBufferedEvents.add(MotionEvent.obtain(event)); |
| 132 | Point pointEnd = new Point(event.getX() / mDpi, event.getY() / mDpi); |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 133 | |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 134 | while (pointEnd.dist(new Point(mBufferedEvents.getFirst().getX() / mDpi, |
| 135 | mBufferedEvents.getFirst().getY() / mDpi)) > FINGER_DISTANCE) { |
| 136 | addTouchEvent(mBufferedEvents.getFirst()); |
| 137 | mBufferedEvents.remove(); |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | int action = event.getActionMasked(); |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 141 | if (action == MotionEvent.ACTION_UP) { |
| 142 | mBufferedEvents.getFirst().setAction(MotionEvent.ACTION_UP); |
| 143 | addTouchEvent(mBufferedEvents.getFirst()); |
| 144 | mBufferedEvents.clear(); |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 145 | } |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 146 | } else { |
| 147 | addTouchEvent(event); |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 148 | } |
| 149 | } |
| 150 | |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 151 | private void addTouchEvent(MotionEvent event) { |
| 152 | mClassifierData.update(event); |
| 153 | |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 154 | for (StrokeClassifier c : mStrokeClassifiers) { |
| 155 | c.onTouchEvent(event); |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 156 | } |
| 157 | |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 158 | for (GestureClassifier c : mGestureClassifiers) { |
| 159 | c.onTouchEvent(event); |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | int size = mClassifierData.getEndingStrokes().size(); |
| 163 | for (int i = 0; i < size; i++) { |
| 164 | Stroke stroke = mClassifierData.getEndingStrokes().get(i); |
| 165 | float evaluation = 0.0f; |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 166 | StringBuilder sb = FalsingLog.ENABLED ? new StringBuilder("stroke") : null; |
| 167 | for (StrokeClassifier c : mStrokeClassifiers) { |
| 168 | float e = c.getFalseTouchEvaluation(mCurrentType, stroke); |
| 169 | if (FalsingLog.ENABLED) { |
| 170 | String tag = c.getTag(); |
| 171 | sb.append(" ").append(e >= 1f ? tag : tag.toLowerCase()).append("=").append(e); |
| 172 | } |
| 173 | evaluation += e; |
| 174 | } |
| 175 | |
| 176 | if (FalsingLog.ENABLED) { |
| 177 | FalsingLog.i(" addTouchEvent", sb.toString()); |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 178 | } |
| 179 | mHistoryEvaluator.addStroke(evaluation); |
| 180 | } |
| 181 | |
| 182 | int action = event.getActionMasked(); |
| 183 | if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL) { |
| 184 | float evaluation = 0.0f; |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 185 | StringBuilder sb = FalsingLog.ENABLED ? new StringBuilder("gesture") : null; |
| 186 | for (GestureClassifier c : mGestureClassifiers) { |
| 187 | float e = c.getFalseTouchEvaluation(mCurrentType); |
| 188 | if (FalsingLog.ENABLED) { |
| 189 | String tag = c.getTag(); |
| 190 | sb.append(" ").append(e >= 1f ? tag : tag.toLowerCase()).append("=").append(e); |
| 191 | } |
| 192 | evaluation += e; |
| 193 | } |
| 194 | if (FalsingLog.ENABLED) { |
| 195 | FalsingLog.i(" addTouchEvent", sb.toString()); |
Blazej Magnowski | 91be2f8 | 2015-09-24 16:41:58 -0700 | [diff] [blame] | 196 | } |
| 197 | mHistoryEvaluator.addGesture(evaluation); |
| 198 | setType(Classifier.GENERIC); |
| 199 | } |
| 200 | |
| 201 | mClassifierData.cleanUp(event); |
| 202 | } |
| 203 | |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 204 | @Override |
| 205 | public void onSensorChanged(SensorEvent event) { |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 206 | for (Classifier c : mStrokeClassifiers) { |
| 207 | c.onSensorChanged(event); |
Blazej Magnowski | 68d0c9b | 2015-09-18 17:25:55 -0700 | [diff] [blame] | 208 | } |
| 209 | |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 210 | for (Classifier c : mGestureClassifiers) { |
| 211 | c.onSensorChanged(event); |
Blazej Magnowski | 68d0c9b | 2015-09-18 17:25:55 -0700 | [diff] [blame] | 212 | } |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 213 | } |
| 214 | |
Blazej Magnowski | 9f01c5b | 2015-09-17 15:14:29 -0700 | [diff] [blame] | 215 | public boolean isFalseTouch() { |
Blazej Magnowski | 6dc59b4 | 2015-09-22 15:14:20 -0700 | [diff] [blame] | 216 | if (mEnableClassifier) { |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 217 | float evaluation = mHistoryEvaluator.getEvaluation(); |
| 218 | boolean result = evaluation >= 5.0f; |
| 219 | if (FalsingLog.ENABLED) { |
| 220 | FalsingLog.i("isFalseTouch", new StringBuilder() |
| 221 | .append("eval=").append(evaluation).append(" result=") |
| 222 | .append(result ? 1 : 0).toString()); |
| 223 | } |
| 224 | return result; |
Blazej Magnowski | 6dc59b4 | 2015-09-22 15:14:20 -0700 | [diff] [blame] | 225 | } |
| 226 | return false; |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | public boolean isEnabled() { |
| 230 | return mEnableClassifier; |
| 231 | } |
Adrian Roos | 401caae | 2016-03-04 13:35:21 -0800 | [diff] [blame] | 232 | |
| 233 | @Override |
| 234 | public String getTag() { |
| 235 | return "HIC"; |
| 236 | } |
Blazej Magnowski | 0e2ffbd | 2015-09-10 14:37:17 -0700 | [diff] [blame] | 237 | } |