1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.example.android.support.text.emoji;
18
19import android.content.Context;
20import android.os.Bundle;
21import android.view.LayoutInflater;
22import android.view.View;
23import android.view.ViewGroup;
24import android.widget.ArrayAdapter;
25import android.widget.ListView;
26import android.widget.TextView;
27
28import androidx.annotation.NonNull;
29import androidx.fragment.app.Fragment;
30
31import java.util.List;
32
33/**
34 * UI to list all supported emojis.
35 */
36
37public class ListFragment extends Fragment {
38
39    private ListView mListView;
40
41    static ListFragment newInstance() {
42        ListFragment fragment = new ListFragment();
43        return fragment;
44    }
45
46    @Override
47    public View onCreateView(LayoutInflater inflater, ViewGroup container,
48            Bundle savedInstanceState) {
49        final View view = inflater.inflate(R.layout.fragment_list, container, false);
50        mListView = view.findViewById(R.id.list);
51        loadList();
52        return view;
53    }
54
55    private void loadList() {
56        final ArrayAdapter<EmojiRepo.EmojiData> adapter = new MyArrayAdapter(getActivity(),
57                R.layout.list_item_emoji, R.id.text, EmojiRepo.getEmojis());
58        final int index = mListView.getFirstVisiblePosition();
59        mListView.setAdapter(adapter);
60        mListView.setSelection(index);
61    }
62
63    private static class MyArrayAdapter extends ArrayAdapter<EmojiRepo.EmojiData> {
64        MyArrayAdapter(Context context, int resource, int textViewResourceId,
65                List<EmojiRepo.EmojiData> objects) {
66            super(context, resource, textViewResourceId, objects);
67        }
68
69        @NonNull
70        @Override
71        public View getView(int position, View convertView, ViewGroup parent) {
72            View view = super.getView(position, convertView, parent);
73            ViewHolder holder = (ViewHolder) view.getTag();
74            if (holder == null) {
75                holder = new ViewHolder();
76                holder.mEmojiTextView = view.findViewById(R.id.emoji);
77                holder.mTextView = view.findViewById(R.id.text);
78            }
79
80            EmojiRepo.EmojiData item = getItem(position);
81            holder.mEmojiTextView.setText(item.getEmoji());
82            holder.mTextView.setText(item.getCodepointString());
83            holder.mTextView.setContentDescription(holder.mTextView.getText());
84            return view;
85        }
86    }
87
88    private static class ViewHolder {
89        TextView mEmojiTextView;
90        TextView mTextView;
91    }
92
93}
94