| /* |
| * Copyright (C) 2016 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.test.uibench; |
| |
| import android.content.Context; |
| import android.os.Trace; |
| import androidx.recyclerview.widget.GridLayoutManager; |
| import androidx.recyclerview.widget.RecyclerView; |
| import com.android.test.uibench.recyclerview.RvBoxAdapter; |
| import com.android.test.uibench.recyclerview.RvCompatListActivity; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| public class SlowBindRecyclerViewActivity extends RvCompatListActivity { |
| /** |
| * Spin wait. Used instead of sleeping so a core is used up for the duration, and so |
| * traces/sampled profiling show the sections as expensive, and not just a scheduling mistake. |
| */ |
| private static void spinWaitMs(long ms) { |
| long start = System.nanoTime(); |
| while (System.nanoTime() - start < TimeUnit.MILLISECONDS.toNanos(ms)); |
| } |
| |
| @Override |
| protected RecyclerView.LayoutManager createLayoutManager(Context context) { |
| return new GridLayoutManager(context, 3); |
| } |
| |
| @Override |
| protected RecyclerView.Adapter createAdapter() { |
| return new RvBoxAdapter(this, TextUtils.buildSimpleStringList()) { |
| @Override |
| public void onBindViewHolder(ViewHolder holder, int position) { |
| Trace.beginSection("bind item " + position); |
| |
| spinWaitMs(3); |
| super.onBindViewHolder(holder, position); |
| Trace.endSection(); |
| } |
| }; |
| } |
| } |