diff options
Diffstat (limited to 'java/com/android/incallui/answer/impl/classifier/LengthCountClassifier.java')
-rw-r--r-- | java/com/android/incallui/answer/impl/classifier/LengthCountClassifier.java | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/java/com/android/incallui/answer/impl/classifier/LengthCountClassifier.java b/java/com/android/incallui/answer/impl/classifier/LengthCountClassifier.java new file mode 100644 index 000000000..7dd2ab674 --- /dev/null +++ b/java/com/android/incallui/answer/impl/classifier/LengthCountClassifier.java @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2015 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; + +/** + * A classifier which looks at the ratio between the length of the stroke and its number of points. + * The number of points is subtracted by 2 because the UP event comes in with some delay and it + * should not influence the ratio and also strokes which are long and have a small number of points + * are punished more (these kind of strokes are usually bad ones and they tend to score well in + * other classifiers). + */ +class LengthCountClassifier extends StrokeClassifier { + public LengthCountClassifier(ClassifierData classifierData) {} + + @Override + public String getTag() { + return "LEN_CNT"; + } + + @Override + public float getFalseTouchEvaluation(Stroke stroke) { + return LengthCountEvaluator.evaluate( + stroke.getTotalLength() / Math.max(1.0f, stroke.getCount() - 2)); + } +} |