1 /*
2  * Copyright (C) 2020 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.car.rotaryplayground;
18 
19 import android.os.Bundle;
20 import android.view.LayoutInflater;
21 import android.view.View;
22 import android.view.ViewGroup;
23 import androidx.annotation.Nullable;
24 import androidx.fragment.app.Fragment;
25 import androidx.recyclerview.widget.GridLayoutManager;
26 import androidx.recyclerview.widget.RecyclerView;
27 
28 /**
29  * Fragment with a RecyclerView Grid to demo and test z-pattern rotating navigation and
30  * vertical scroll.
31  */
32 public class RotaryGrid extends Fragment {
33 
34     private static final int NUMBER_OF_COLUMNS = 3;
35 
36     private static final String[] DATA = {
37         "1", "2", "3", "4", "5", "6", "7", "8", "9", "10",
38         "11", "12", "13", "14", "15", "16", "17", "18", "19", "20",
39         "21", "22", "23", "24", "25", "26", "27", "28", "29", "30",
40         "31", "32", "33", "34", "35", "36", "37", "38", "39", "40",
41         "41", "42", "43", "44", "45", "46", "47", "48", "49", "50"};
42 
43     private RotaryGridAdapter mGridAdapter;
44 
45     @Override
onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState)46     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
47             @Nullable Bundle savedInstanceState) {
48         View view = inflater.inflate(R.layout.rotary_grid, container, false);
49         populateGridItems(view);
50         return view;
51     }
52 
populateGridItems(View view)53     private void populateGridItems(View view) {
54         RecyclerView gridView = view.findViewById(R.id.rotary_grid_view);
55         gridView.setLayoutManager(new GridLayoutManager(getActivity(), NUMBER_OF_COLUMNS));
56         mGridAdapter = new RotaryGridAdapter(getActivity(), DATA);
57         gridView.setAdapter(mGridAdapter);
58     }
59 }
60