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.support.v17.leanback.widget.ArrayObjectAdapter;
19import android.support.v17.leanback.widget.HeaderItem;
20import android.support.v17.leanback.widget.ImageCardView;
21import android.support.v17.leanback.widget.ListRow;
22import android.support.v17.leanback.widget.ListRowPresenter;
23import android.support.v17.leanback.widget.OnItemViewClickedListener;
24import android.support.v17.leanback.widget.OnItemViewSelectedListener;
25import android.support.v17.leanback.widget.Presenter;
26import android.support.v17.leanback.widget.Row;
27import android.support.v17.leanback.widget.RowPresenter;
28import android.support.v17.leanback.widget.TitleHelper;
29import android.support.v4.app.ActivityOptionsCompat;
30import android.util.Log;
31
32public class RowsFragment extends android.support.v17.leanback.app.RowsFragment {
33
34    private static final String TAG = "leanback.RowsFragment";
35
36    private static final int NUM_ROWS = 10;
37    // Row heights default to wrap content
38    private static final boolean USE_FIXED_ROW_HEIGHT = false;
39
40    private TitleHelper mTitleHelper;
41
42    public void setTitleHelper(TitleHelper titleHelper) {
43        mTitleHelper = titleHelper;
44    }
45
46    @Override
47    public void onCreate(Bundle savedInstanceState) {
48        Log.i(TAG, "onCreate");
49        super.onCreate(savedInstanceState);
50
51        setupRows();
52        setOnItemViewClickedListener(new ItemViewClickedListener());
53        setOnItemViewSelectedListener(new OnItemViewSelectedListener() {
54            @Override
55            public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item,
56                    RowPresenter.ViewHolder rowViewHolder, Row row) {
57                Log.i(TAG, "onItemSelected: " + item + " row " + row);
58                if (mTitleHelper != null) {
59                    mTitleHelper.showTitle(getAdapter() == null || getAdapter().size() == 0 ||
60                            getAdapter().get(0) == row);
61                }
62            }
63        });
64    }
65
66    private void setupRows() {
67        ListRowPresenter lrp = new ListRowPresenter();
68
69        // For good performance, it's important to use a single instance of
70        // a card presenter for all rows using that presenter.
71        final CardPresenter cardPresenter = new CardPresenter();
72
73        if (USE_FIXED_ROW_HEIGHT) {
74            lrp.setRowHeight(cardPresenter.getRowHeight(getActivity()));
75            lrp.setExpandedRowHeight(cardPresenter.getExpandedRowHeight(getActivity()));
76        }
77
78        ArrayObjectAdapter rowsAdapter = new ArrayObjectAdapter(lrp);
79
80        for (int i = 0; i < NUM_ROWS; ++i) {
81            ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(cardPresenter);
82            listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_1));
83            listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_2));
84            listRowAdapter.add(new PhotoItem("Android TV", R.drawable.gallery_photo_3));
85            listRowAdapter.add(new PhotoItem("Leanback", R.drawable.gallery_photo_4));
86            listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_5));
87            listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_6));
88            listRowAdapter.add(new PhotoItem("Android TV", R.drawable.gallery_photo_7));
89            listRowAdapter.add(new PhotoItem("Leanback", R.drawable.gallery_photo_8));
90            HeaderItem header = new HeaderItem(i, "Row " + i);
91            rowsAdapter.add(new ListRow(header, listRowAdapter));
92        }
93
94        setAdapter(rowsAdapter);
95    }
96
97    private final class ItemViewClickedListener implements OnItemViewClickedListener {
98        @Override
99        public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
100                RowPresenter.ViewHolder rowViewHolder, Row row) {
101            Intent intent = new Intent(getActivity(), DetailsActivity.class);
102            intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
103
104            Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
105                    getActivity(),
106                    ((ImageCardView)itemViewHolder.view).getMainImageView(),
107                    DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
108            getActivity().startActivity(intent, bundle);
109        }
110    }
111}
112