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.Context;
17 import android.content.Intent;
18 import android.os.Bundle;
19 import android.os.Handler;
20 import android.util.Log;
21 import android.view.View;
22 
23 import androidx.core.content.res.ResourcesCompat;
24 import androidx.leanback.widget.ArrayObjectAdapter;
25 import androidx.leanback.widget.OnItemViewClickedListener;
26 import androidx.leanback.widget.OnItemViewSelectedListener;
27 import androidx.leanback.widget.Presenter;
28 import androidx.leanback.widget.Row;
29 import androidx.leanback.widget.RowPresenter;
30 import androidx.leanback.widget.VerticalGridPresenter;
31 
32 public class VerticalGridFragment extends androidx.leanback.app.VerticalGridFragment {
33     private static final String TAG = "leanback.VerticalGridFragment";
34 
35     private static final int NUM_COLUMNS = 3;
36     private static final int NUM_ITEMS = 50;
37     private static final int HEIGHT = 200;
38     private static final boolean TEST_ENTRANCE_TRANSITION = true;
39 
40     private static class Adapter extends ArrayObjectAdapter {
Adapter(StringPresenter presenter)41         public Adapter(StringPresenter presenter) {
42             super(presenter);
43         }
callNotifyChanged()44         public void callNotifyChanged() {
45             super.notifyChanged();
46         }
47     }
48     private Adapter mAdapter;
49 
50     @Override
onCreate(Bundle savedInstanceState)51     public void onCreate(Bundle savedInstanceState) {
52         Log.i(TAG, "onCreate");
53         super.onCreate(savedInstanceState);
54 
55         final Context context = getActivity();
56         setBadgeDrawable(ResourcesCompat.getDrawable(context.getResources(),
57                 R.drawable.ic_title, context.getTheme()));
58         setTitle("Leanback Vertical Grid Demo");
59 
60         setupFragment();
61         if (TEST_ENTRANCE_TRANSITION) {
62             // don't run entrance transition if fragment is restored.
63             if (savedInstanceState == null) {
64                 prepareEntranceTransition();
65             }
66         }
67         // simulates in a real world use case  data being loaded two seconds later
68         new Handler().postDelayed(new Runnable() {
69             @Override
70             public void run() {
71                 loadData();
72                 startEntranceTransition();
73             }
74         }, 2000);
75     }
76 
loadData()77     private void loadData() {
78         for (int i = 0; i < NUM_ITEMS; i++) {
79             mAdapter.add(Integer.toString(i));
80         }
81     }
82 
setupFragment()83     private void setupFragment() {
84         VerticalGridPresenter gridPresenter = new VerticalGridPresenter();
85         gridPresenter.setNumberOfColumns(NUM_COLUMNS);
86         setGridPresenter(gridPresenter);
87 
88         mAdapter = new Adapter(new StringPresenter());
89         setAdapter(mAdapter);
90 
91         setOnItemViewSelectedListener(new OnItemViewSelectedListener() {
92             @Override
93             public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item,
94                     RowPresenter.ViewHolder rowViewHolder, Row row) {
95                 Log.i(TAG, "onItemSelected: " + item + " row " + row);
96             }
97         });
98 
99         setOnItemViewClickedListener(new OnItemViewClickedListener() {
100             @Override
101             public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
102                     RowPresenter.ViewHolder rowViewHolder, Row row) {
103                 Log.i(TAG, "onItemClicked: " + item + " row " + row);
104                 mAdapter.callNotifyChanged();
105             }
106         });
107         setOnSearchClickedListener(new View.OnClickListener() {
108             @Override
109             public void onClick(View view) {
110                 Intent intent = new Intent(getActivity(), SearchActivity.class);
111                 startActivity(intent);
112             }
113         });
114     }
115 }
116