1 // CHECKSTYLE:OFF Generated code
2 /* This file is auto-generated from RowsFragment.java.  DO NOT MODIFY. */
3 
4 /*
5  * Copyright (C) 2014 The Android Open Source Project
6  *
7  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
8  * in compliance with the License. You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software distributed under the License
13  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
14  * or implied. See the License for the specific language governing permissions and limitations under
15  * the License.
16  */
17 package com.example.android.leanback;
18 
19 import android.content.Intent;
20 import android.os.Bundle;
21 import android.util.Log;
22 
23 import androidx.core.app.ActivityOptionsCompat;
24 import androidx.leanback.paging.PagingDataAdapter;
25 import androidx.leanback.widget.ArrayObjectAdapter;
26 import androidx.leanback.widget.ClassPresenterSelector;
27 import androidx.leanback.widget.HeaderItem;
28 import androidx.leanback.widget.ImageCardView;
29 import androidx.leanback.widget.ListRow;
30 import androidx.leanback.widget.ListRowPresenter;
31 import androidx.leanback.widget.OnItemViewClickedListener;
32 import androidx.leanback.widget.OnItemViewSelectedListener;
33 import androidx.leanback.widget.Presenter;
34 import androidx.leanback.widget.Row;
35 import androidx.leanback.widget.RowPresenter;
36 import androidx.leanback.widget.TitleHelper;
37 import androidx.recyclerview.widget.DiffUtil;
38 
39 import org.jspecify.annotations.NonNull;
40 
41 public class RowsSupportFragment extends androidx.leanback.app.RowsSupportFragment {
42 
43     private static final String TAG = "leanback.RowsSupportFragment";
44 
45     private static final int NUM_ROWS = 10;
46     // Row heights default to wrap content
47     private static final boolean USE_FIXED_ROW_HEIGHT = false;
48 
49     private TitleHelper mTitleHelper;
50 
setTitleHelper(TitleHelper titleHelper)51     public void setTitleHelper(TitleHelper titleHelper) {
52         mTitleHelper = titleHelper;
53     }
54 
55     @Override
onCreate(Bundle savedInstanceState)56     public void onCreate(Bundle savedInstanceState) {
57         Log.i(TAG, "onCreate");
58         super.onCreate(savedInstanceState);
59 
60         setupRows();
61         setOnItemViewClickedListener(new ItemViewClickedListener());
62         setOnItemViewSelectedListener(new OnItemViewSelectedListener() {
63             @Override
64             public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item,
65                     RowPresenter.ViewHolder rowViewHolder, Row row) {
66                 Log.i(TAG, "onItemSelected: " + item + " row " + row);
67                 if (mTitleHelper != null) {
68                     mTitleHelper.showTitle(getAdapter() == null || getAdapter().size() == 0 ||
69                             getAdapter().get(0) == row);
70                 }
71             }
72         });
73     }
74 
setupRows()75     private void setupRows() {
76         ClassPresenterSelector cs = new ClassPresenterSelector();
77         ListRowPresenter lrp = new ListRowPresenter();
78         PagedRowPresenter prp = new PagedRowPresenter();
79 
80         // For good performance, it's important to use a single instance of
81         // a card presenter for all rows using that presenter.
82         final CardPresenter cardPresenter = new CardPresenter();
83 
84         if (USE_FIXED_ROW_HEIGHT) {
85             lrp.setRowHeight(cardPresenter.getRowHeight(getActivity()));
86             lrp.setExpandedRowHeight(cardPresenter.getExpandedRowHeight(getActivity()));
87             prp.setRowHeight(cardPresenter.getRowHeight(getActivity()));
88             prp.setExpandedRowHeight(cardPresenter.getExpandedRowHeight(getActivity()));
89         }
90 
91         ArrayObjectAdapter rowsAdapter = new ArrayObjectAdapter(cs);
92 
93         for (int i = 0; i < NUM_ROWS; ++i) {
94             ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(cardPresenter);
95             listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_1));
96             listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_2));
97             listRowAdapter.add(new PhotoItem("Android TV", R.drawable.gallery_photo_3));
98             listRowAdapter.add(new PhotoItem("Leanback", R.drawable.gallery_photo_4));
99             listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_5));
100             listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_6));
101             listRowAdapter.add(new PhotoItem("Android TV", R.drawable.gallery_photo_7));
102             listRowAdapter.add(new PhotoItem("Leanback", R.drawable.gallery_photo_8));
103             HeaderItem header = new HeaderItem(i, "Row " + i);
104             rowsAdapter.add(new ListRow(header, listRowAdapter));
105         }
106 
107         rowsAdapter.add(getLiveDataRow(NUM_ROWS, cardPresenter));
108         cs.addClassPresenter(ListRow.class, lrp);
109         cs.addClassPresenter(LiveDataListRow.class, prp);
110         setAdapter(rowsAdapter);
111     }
112 
113     private final class ItemViewClickedListener implements OnItemViewClickedListener {
114         @Override
onItemClicked(Presenter.ViewHolder itemViewHolder, Object item, RowPresenter.ViewHolder rowViewHolder, Row row)115         public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
116                 RowPresenter.ViewHolder rowViewHolder, Row row) {
117             Intent intent = new Intent(getActivity(), DetailsSupportActivity.class);
118             intent.putExtra(DetailsSupportActivity.EXTRA_ITEM, (PhotoItem) item);
119 
120             Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
121                     getActivity(),
122                     ((ImageCardView) itemViewHolder.view).getMainImageView(),
123                     DetailsSupportActivity.SHARED_ELEMENT_NAME).toBundle();
124             getActivity().startActivity(intent, bundle);
125         }
126     }
127 
getLiveDataRow(int index, CardPresenter cardPresenter)128     private ListRow getLiveDataRow(int index, CardPresenter cardPresenter) {
129         PagingDataAdapter<PhotoItem> pagedListAdapter =
130                 new PagingDataAdapter<PhotoItem>(cardPresenter,
131                         new DiffUtil.ItemCallback<PhotoItem>() {
132                             @Override
133                             public boolean areItemsTheSame(@NonNull PhotoItem oldItem,
134                                     @NonNull PhotoItem newItem) {
135                                 return oldItem.getId() == newItem.getId();
136                             }
137                             @Override
138                             public boolean areContentsTheSame(@NonNull PhotoItem oldItem,
139                                     @NonNull PhotoItem newItem) {
140                                 return oldItem.equals(newItem);
141                             }
142                         });
143 
144         HeaderItem header = new HeaderItem(index, "Row with paging data adapter");
145         return new LiveDataListRow(header, pagedListAdapter);
146     }
147 }
148