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