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  */
14 package com.example.android.leanback;
15 
16 import android.content.Intent;
17 import android.os.Bundle;
18 import android.support.v17.leanback.widget.ArrayObjectAdapter;
19 import android.support.v17.leanback.widget.HeaderItem;
20 import android.support.v17.leanback.widget.ImageCardView;
21 import android.support.v17.leanback.widget.ListRow;
22 import android.support.v17.leanback.widget.ListRowPresenter;
23 import android.support.v17.leanback.widget.OnItemViewClickedListener;
24 import android.support.v17.leanback.widget.OnItemViewSelectedListener;
25 import android.support.v17.leanback.widget.Presenter;
26 import android.support.v17.leanback.widget.Row;
27 import android.support.v17.leanback.widget.RowPresenter;
28 import android.support.v17.leanback.widget.TitleHelper;
29 import android.support.v4.app.ActivityOptionsCompat;
30 import android.util.Log;
31 
32 public 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 
setTitleHelper(TitleHelper titleHelper)42     public void setTitleHelper(TitleHelper titleHelper) {
43         mTitleHelper = titleHelper;
44     }
45 
46     @Override
onCreate(Bundle savedInstanceState)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 
setupRows()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
onItemClicked(Presenter.ViewHolder itemViewHolder, Object item, RowPresenter.ViewHolder rowViewHolder, Row row)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