RowsFragment.java revision 8cef5c8d58f50d5baca1da44a7c19f623cbf98ec 
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.app.Activity;
17import android.content.Intent;
18import android.os.Bundle;
19import android.support.v17.leanback.widget.TitleHelper;
20import android.support.v17.leanback.widget.TitleView;
21import android.support.v4.app.ActivityOptionsCompat;
22import android.support.v17.leanback.R;
23import android.support.v17.leanback.widget.ArrayObjectAdapter;
24import android.support.v17.leanback.widget.HeaderItem;
25import android.support.v17.leanback.widget.ImageCardView;
26import android.support.v17.leanback.widget.ListRow;
27import android.support.v17.leanback.widget.ListRowPresenter;
28import android.support.v17.leanback.widget.OnItemViewClickedListener;
29import android.support.v17.leanback.widget.OnItemViewSelectedListener;
30import android.support.v17.leanback.widget.Presenter;
31import android.support.v17.leanback.widget.Row;
32import android.support.v17.leanback.widget.RowPresenter;
33import android.util.Log;
34import android.view.LayoutInflater;
35import android.view.View;
36import android.view.ViewGroup;
37
38public class RowsFragment extends android.support.v17.leanback.app.RowsFragment {
39
40    private static final String TAG = "leanback.RowsFragment";
41
42    private static final int NUM_ROWS = 10;
43    // Row heights default to wrap content
44    private static final boolean USE_FIXED_ROW_HEIGHT = false;
45
46    private ArrayObjectAdapter mRowsAdapter;
47    private TitleHelper mTitleHelper;
48
49    public void setTitleHelper(TitleHelper titleHelper) {
50        mTitleHelper = titleHelper;
51    }
52
53    @Override
54    public void onCreate(Bundle savedInstanceState) {
55        Log.i(TAG, "onCreate");
56        super.onCreate(savedInstanceState);
57
58        setupRows();
59        setOnItemViewClickedListener(new ItemViewClickedListener());
60        setOnItemViewSelectedListener(new OnItemViewSelectedListener() {
61            @Override
62            public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item,
63                    RowPresenter.ViewHolder rowViewHolder, Row row) {
64                Log.i(TAG, "onItemSelected: " + item + " row " + row);
65                if (mTitleHelper != null) {
66                    mTitleHelper.showTitle(getAdapter() == null || getAdapter().size() == 0 ||
67                            getAdapter().get(0) == row);
68                }
69            }
70        });
71    }
72
73    private void setupRows() {
74        ListRowPresenter lrp = new ListRowPresenter();
75
76        if (USE_FIXED_ROW_HEIGHT) {
77            lrp.setRowHeight(CardPresenter.getRowHeight(getActivity()));
78            lrp.setExpandedRowHeight(CardPresenter.getExpandedRowHeight(getActivity()));
79        }
80
81        mRowsAdapter = new ArrayObjectAdapter(lrp);
82
83        // For good performance, it's important to use a single instance of
84        // a card presenter for all rows using that presenter.
85        final CardPresenter cardPresenter = new CardPresenter();
86
87        for (int i = 0; i < NUM_ROWS; ++i) {
88            ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(cardPresenter);
89            listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_1));
90            listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_2));
91            listRowAdapter.add(new PhotoItem("Android TV", R.drawable.gallery_photo_3));
92            listRowAdapter.add(new PhotoItem("Leanback", R.drawable.gallery_photo_4));
93            listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_5));
94            listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_6));
95            listRowAdapter.add(new PhotoItem("Android TV", R.drawable.gallery_photo_7));
96            listRowAdapter.add(new PhotoItem("Leanback", R.drawable.gallery_photo_8));
97            HeaderItem header = new HeaderItem(i, "Row " + i);
98            mRowsAdapter.add(new ListRow(header, listRowAdapter));
99        }
100
101        setAdapter(mRowsAdapter);
102    }
103
104    private final class ItemViewClickedListener implements OnItemViewClickedListener {
105        @Override
106        public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
107                RowPresenter.ViewHolder rowViewHolder, Row row) {
108            Intent intent = new Intent(getActivity(), DetailsActivity.class);
109            intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
110
111            Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
112                    getActivity(),
113                    ((ImageCardView)itemViewHolder.view).getMainImageView(),
114                    DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
115            getActivity().startActivity(intent, bundle);
116        }
117    }
118}
119