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