1 /*
2  * Copyright (C) 2015 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 com.android.test.uibench.recyclerview;
17 
18 import android.content.Context;
19 import android.os.Bundle;
20 import android.view.LayoutInflater;
21 import android.view.View;
22 import android.view.ViewGroup;
23 
24 import androidx.annotation.Nullable;
25 import androidx.appcompat.app.AppCompatActivity;
26 import androidx.fragment.app.Fragment;
27 import androidx.fragment.app.FragmentManager;
28 import androidx.recyclerview.widget.LinearLayoutManager;
29 import androidx.recyclerview.widget.RecyclerView;
30 
31 import com.android.test.uibench.R;
32 
33 public abstract class RvCompatListActivity extends AppCompatActivity {
34     public static class RecyclerViewFragment extends Fragment {
35         RecyclerView.LayoutManager layoutManager;
36         RecyclerView.Adapter adapter;
37 
38         @Nullable
39         @Override
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)40         public View onCreateView(LayoutInflater inflater, ViewGroup container,
41                 Bundle savedInstanceState) {
42             RecyclerView recyclerView = (RecyclerView) inflater.inflate(
43                     R.layout.recycler_view, container, false);
44             recyclerView.setLayoutManager(layoutManager);
45             recyclerView.setAdapter(adapter);
46             return recyclerView;
47         }
48     }
49 
50     @Override
onCreate(Bundle savedInstanceState)51     protected void onCreate(Bundle savedInstanceState) {
52         super.onCreate(savedInstanceState);
53 
54         FragmentManager fm = getSupportFragmentManager();
55         Fragment existingFragment = fm.findFragmentById(android.R.id.content);
56         if (existingFragment == null) {
57             RecyclerViewFragment fragment = new RecyclerViewFragment();
58             initializeRecyclerViewFragment(fragment);
59             fm.beginTransaction().add(android.R.id.content, fragment).commit();
60         } else if (existingFragment instanceof RecyclerViewFragment) {
61             initializeRecyclerViewFragment((RecyclerViewFragment) existingFragment);
62         }
63     }
64 
initializeRecyclerViewFragment(RecyclerViewFragment fragment)65     private void initializeRecyclerViewFragment(RecyclerViewFragment fragment) {
66         fragment.layoutManager = createLayoutManager(this);
67         fragment.adapter = createAdapter();
68     }
69 
createLayoutManager(Context context)70     protected RecyclerView.LayoutManager createLayoutManager(Context context) {
71         return new LinearLayoutManager(context);
72     }
73 
createAdapter()74     protected abstract RecyclerView.Adapter createAdapter();
75 }
76