| /* |
| * Copyright (C) 2020 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.classifier; |
| |
| import static com.android.systemui.classifier.Classifier.NOTIFICATION_DRAG_DOWN; |
| import static com.android.systemui.classifier.Classifier.QUICK_SETTINGS; |
| |
| import android.view.MotionEvent; |
| |
| import java.util.Locale; |
| |
| import javax.inject.Inject; |
| |
| /** |
| * False touch if more than one finger touches the screen. |
| * |
| * IMPORTANT: This should not be used for certain cases (i.e. a11y) as we expect multiple fingers |
| * for them. |
| */ |
| class PointerCountClassifier extends FalsingClassifier { |
| |
| private static final int MAX_ALLOWED_POINTERS = 1; |
| private static final int MAX_ALLOWED_POINTERS_SWIPE_DOWN = 2; |
| private int mMaxPointerCount; |
| |
| @Inject |
| PointerCountClassifier(FalsingDataProvider dataProvider) { |
| super(dataProvider); |
| } |
| |
| @Override |
| public void onTouchEvent(MotionEvent motionEvent) { |
| int pCount = mMaxPointerCount; |
| if (motionEvent.getActionMasked() == MotionEvent.ACTION_DOWN) { |
| mMaxPointerCount = motionEvent.getPointerCount(); |
| } else { |
| mMaxPointerCount = Math.max(mMaxPointerCount, motionEvent.getPointerCount()); |
| } |
| if (pCount != mMaxPointerCount) { |
| logDebug("Pointers observed:" + mMaxPointerCount); |
| } |
| } |
| |
| @Override |
| Result calculateFalsingResult( |
| @Classifier.InteractionType int interactionType, |
| double historyBelief, double historyConfidence) { |
| int allowedPointerCount = |
| (interactionType == QUICK_SETTINGS || interactionType == NOTIFICATION_DRAG_DOWN) |
| ? MAX_ALLOWED_POINTERS_SWIPE_DOWN : MAX_ALLOWED_POINTERS; |
| |
| return mMaxPointerCount > allowedPointerCount |
| ? falsed(1, getReason(allowedPointerCount)) : Result.passed(0); |
| } |
| |
| private String getReason(int allowedPointerCount) { |
| return String.format( |
| (Locale) null, |
| "{pointersObserved=%d, threshold=%d}", |
| mMaxPointerCount, |
| allowedPointerCount); |
| } |
| } |