1 /* 2 * Copyright (C) 2018 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.dialer.metrics.jank; 18 19 import android.support.v7.widget.RecyclerView; 20 import android.support.v7.widget.RecyclerView.OnScrollListener; 21 import com.android.dialer.metrics.Metrics; 22 23 /** Logs jank for {@link RecyclerView} scrolling events. */ 24 public final class RecyclerViewJankLogger extends OnScrollListener { 25 26 private final Metrics metrics; 27 private final String eventName; 28 29 private boolean isScrolling; 30 31 public RecyclerViewJankLogger(Metrics metrics, String eventName) { 32 this.metrics = metrics; 33 this.eventName = eventName; 34 } 35 36 @Override 37 public void onScrollStateChanged(RecyclerView recyclerView, int newState) { 38 if (!isScrolling && newState == RecyclerView.SCROLL_STATE_DRAGGING) { 39 isScrolling = true; 40 metrics.startJankRecorder(eventName); 41 } else if (isScrolling && newState == RecyclerView.SCROLL_STATE_IDLE) { 42 isScrolling = false; 43 metrics.stopJankRecorder(eventName); 44 } 45 } 46 } 47
