1 /* 2 * Copyright (C) 2016 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 package android.support.v7.widget; 17 18 19 import android.view.View; 20 21 import java.util.ArrayList; 22 import java.util.List; 23 24 /** 25 * Simple class that can collect list of view attach and detach events so that we can assert on them 26 */ 27 public class AttachDetachCollector implements RecyclerView.OnChildAttachStateChangeListener { 28 private final List<View> mAttached = new ArrayList<>(); 29 private final List<View> mDetached = new ArrayList<>(); 30 31 public AttachDetachCollector(RecyclerView recyclerView) { 32 recyclerView.addOnChildAttachStateChangeListener(this); 33 } 34 35 @Override 36 public void onChildViewAttachedToWindow(View view) { 37 mAttached.add(view); 38 } 39 40 @Override 41 public void onChildViewDetachedFromWindow(View view) { 42 mDetached.add(view); 43 } 44 45 public void reset() { 46 mAttached.clear(); 47 mDetached.clear(); 48 } 49 50 public List<View> getAttached() { 51 return mAttached; 52 } 53 54 public List<View> getDetached() { 55 return mDetached; 56 } 57 } 58
