1 /* 2 * Copyright 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.pump.ui; 18 19 import android.util.SparseBooleanArray; 20 21 import androidx.annotation.NonNull; 22 import androidx.annotation.UiThread; 23 import androidx.recyclerview.widget.RecyclerView.RecycledViewPool; 24 import androidx.recyclerview.widget.RecyclerView.ViewHolder; 25 26 import com.android.pump.R; 27 28 @UiThread 29 public class CustomRecycledViewPool extends RecycledViewPool { 30 private static final int MAX_VIEWS = 17; 31 32 private final SparseBooleanArray mInitialized = new SparseBooleanArray(); 33 CustomRecycledViewPool()34 public CustomRecycledViewPool() { 35 setMaxRecycledViews(R.layout.header, 1); 36 setMaxRecycledViews(R.layout.movie, MAX_VIEWS); 37 } 38 39 @Override setMaxRecycledViews(int viewType, int maxViews)40 public void setMaxRecycledViews(int viewType, int maxViews) { 41 super.setMaxRecycledViews(viewType, maxViews); 42 mInitialized.put(viewType, true); 43 } 44 45 @Override putRecycledView(@onNull ViewHolder scrap)46 public void putRecycledView(@NonNull ViewHolder scrap) { 47 int viewType = scrap.getItemViewType(); 48 if (!mInitialized.get(viewType)) { 49 setMaxRecycledViews(viewType, MAX_VIEWS); 50 throw new IllegalArgumentException("Unknown view type"); // TODO tuning only -- remove this 51 } 52 super.putRecycledView(scrap); 53 } 54 } 55