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