在搜索栏可以搜索通讯录中信息
通讯录可以上下滑动查看通讯录
通讯录索引点击字母后,通讯录自动滑动到指定索引的开始位置
1.需要一个模拟的联系人清单来填充通讯录列表，联系人清单需要按照首字母排序，包含姓名，手机号，头像，首字母信息
2.把涉及到的首字母存储起来，填充到索引列表里，因为点击索引需要知道通讯录里的位置，所以还需要存储每个字母第一个成员的位置
3.搜索栏，可以添加对姓名/手机号的搜索，搜索结果放在一个新的列表里
布局（最新的AS已经支持了androidx，开发者不用再考虑android的版本了）
由于没有数据，这里设置了比较醒目的背景色，后期可以取消掉
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <androidx.appcompat.widget.SearchView android:id="@+id/search" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginStart="8dp" android:layout_marginTop="8dp" android:layout_marginEnd="8dp" android:text="搜索栏" android:textSize="18sp" android:background="@android:color/holo_blue_dark" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" tools:ignore="HardcodedText" /> <androidx.recyclerview.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="0dp" android:layout_height="0dp" android:layout_marginStart="8dp" android:layout_marginTop="8dp" android:layout_marginEnd="32dp" android:layout_marginBottom="8dp" android:background="@android:color/holo_orange_dark" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/search" /> <androidx.recyclerview.widget.RecyclerView android:id="@+id/recyclerView2" android:layout_width="0dp" android:layout_height="0dp" android:layout_marginTop="8dp" android:layout_marginEnd="8dp" android:layout_marginBottom="8dp" android:background="@android:color/holo_green_dark" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toEndOf="@+id/recyclerView" app:layout_constraintTop_toBottomOf="@+id/search" /> </androidx.constraintlayout.widget.ConstraintLayout>页面效果
准备我们的联系人清单
这里我构造了一个自己的联系人对象，as中有快捷键，可以帮助我们快速创建对象的构造器和get/set方法，alt+insert方法
public class Contact { private String mFirstLetter; private String mName; private String mPhone; private String mPicUrl; public Contact(String firstLetter, String name, String phone, String picUrl) { mFirstLetter = firstLetter; mName = name; mPhone = phone; mPicUrl = picUrl; } public String getFirstLetter() { return mFirstLetter; } public void setFirstLetter(String firstLetter) { mFirstLetter = firstLetter; } public String getName() { return mName; } public void setName(String name) { mName = name; } public String getPhone() { return mPhone; } public void setPhone(String phone) { mPhone = phone; } public String getPicUrl() { return mPicUrl; } public void setPicUrl(String picUrl) { mPicUrl = picUrl; } }然后在主活动中初始化我们的联系人
private List<Contact>mContactList; ...... private void initContactList() { mContactList=new ArrayList<>(); mContactList.add(new Contact("A","阿黄","13013013011","https://cdn.duitang.com/uploads/item/201508/02/20150802155755_YCynL.thumb.700_0.jpeg")); mContactList.add(new Contact("A","阿芳","14014014011","https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=4259300811,497831842&fm=26&gp=0.jpg")); mContactList.add(new Contact("B","宝宝","15015015011","https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=4285611627,3487298056&fm=26&gp=0.jpg")); mContactList.add(new Contact("D","弟弟","16016016011","https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=1700741544,1951185347&fm=26&gp=0.jpg")); mContactList.add(new Contact("G","哥哥","17017017011","https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=3358148341,156066392&fm=26&gp=0.jpg")); mContactList.add(new Contact("J","姐姐","18018018011","https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=2402471065,951299553&fm=26&gp=0.jpg")); mContactList.add(new Contact("M","妈妈","19019019011","https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=399600612,252901190&fm=26&gp=0.jpg")); mContactList.add(new Contact("M","妹妹","12012012011","https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=1466662081,1140396699&fm=26&gp=0.jpg")); mContactList.add(new Contact("W","忘了名字","15015015012","https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=3361934473,3725527506&fm=26&gp=0.jpg")); mContactList.add(new Contact("X","小强","15015015013","https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=4016536275,4119245052&fm=26&gp=0.jpg")); }头像采用的是百度图片找到的地址，稍后会加载网络图片的形式加载头像
填充我们的RecycleView
需要我们先设置一个布局，命名为contact_item
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content"> <View android:id="@+id/view" android:layout_width="0dp" android:layout_height="20dp" android:background="#DDDDDD" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <ImageView android:id="@+id/pic" android:layout_width="100dp" android:layout_height="100dp" android:layout_marginStart="8dp" android:layout_marginTop="32dp" android:layout_marginBottom="8dp" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" tools:ignore="ContentDescription" tools:srcCompat="@tools:sample/backgrounds/scenic" /> <TextView android:id="@+id/name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="32dp" android:layout_marginTop="8dp" app:layout_constraintStart_toEndOf="@+id/pic" app:layout_constraintTop_toTopOf="@+id/pic" tools:text="阿黄" /> <TextView android:id="@+id/phone" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="32dp" android:layout_marginTop="16dp" app:layout_constraintStart_toEndOf="@+id/pic" app:layout_constraintTop_toBottomOf="@+id/name" tools:text="15015015011" /> <TextView android:id="@+id/letter" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="16dp" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" tools:text="A" /> <View android:layout_width="0dp" android:layout_height="1dp" android:background="#DDDDDD" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" /> </androidx.constraintlayout.widget.ConstraintLayout>页面效果
接下来需要定义一个我们自己的adapter，这是一个适配器，用来加载我们的数据和界面效果
这里先继承RecyclerView.Adapter<VH>,VH这里填我们自己的实现类
public class ContactAdapter extends RecyclerView.Adapter<ContactAdapter.ContactHolder>在ContactAdapter中实现我们的ViewHolder
public class ContactAdapter extends RecyclerView.Adapter<ContactAdapter.ContactHolder> { class ContactHolder extends RecyclerView.ViewHolder{ public ContactHolder(@NonNull View itemView) { super(itemView); } } }这个时候直接在ContactAdapter上点击alt+enter，选择implement methods即可直接解决告警，帮我们添加了必要的需要自己家实现的方法
由于adapter需要保存所有的联系人信息，这里需要我们添加一个联系人列表，并设置构造器
private List<Contact> mContactList; public ContactAdapter(List<Contact> contactList) { mContactList = contactList; }然后实现我们自己的方法即可
下面是完整的代码，加载图片用到了Glide,因为需要网络加载图片，所以记得在配置文件加上网络权限
public class ContactAdapter extends RecyclerView.Adapter<ContactAdapter.ContactHolder> { private List<Contact> mContactList; public ContactAdapter(List<Contact> contactList) { mContactList = contactList; } @NonNull @Override public ContactHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view=LayoutInflater.from(parent.getContext()).inflate(R.layout.contact_item,parent,false); return new ContactHolder(view); } @Override public void onBindViewHolder(@NonNull ContactHolder holder, int position) { Contact data=mContactList.get(position); holder.mLetter.setText(data.getFirstLetter()); holder.mName.setText(data.getName()); holder.mPhone.setText(data.getPhone()); Glide.with(holder.mPic.getContext()).load(data.getPicUrl()).into(holder.mPic); } @Override public int getItemCount() { return mContactList.size(); } class ContactHolder extends RecyclerView.ViewHolder{ private TextView mLetter; private TextView mName; private TextView mPhone; private ImageView mPic; public ContactHolder(@NonNull View itemView) { super(itemView); mName=itemView.findViewById(R.id.name); mLetter=itemView.findViewById(R.id.letter); mPhone=itemView.findViewById(R.id.phone); mPic=itemView.findViewById(R.id.pic); } } }然后加载我们的adpater吧
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mSearch=findViewById(R.id.search); mRecyclerView=findViewById(R.id.recyclerView); mRecyclerView2=findViewById(R.id.recyclerView2); initContactList(); initContactRecyclerView(); } private void initContactRecyclerView() { LinearLayoutManager manager=new LinearLayoutManager(this,RecyclerView.VERTICAL,false); mRecyclerView.setLayoutManager(manager); ContactAdapter adapter=new ContactAdapter(mContactList); mRecyclerView.setAdapter(adapter); }效果如下
这里有完善的地方，首字母最好不要重复出现，比如阿黄和阿芳，标题a出现1次就可以了
不过这里只提供思路，不再讲如何实现。在contact中添加是否需要显示首字母的属性，比较contacList前后两个成员的letter，相同就把第二个成员的隐藏属性打开，在adapter的onBind方法中，隐藏标题栏即可
这里，我们需要拿到联系人清单里出现过的首字母，以及对应第一个首字母联系人在通讯录中的位置
private List<String> mLetterList; private List<Integer> mletterPosition; ...... private void initLetterList() { mLetterList=new ArrayList<>(); mletterPosition=new ArrayList<>(); int index=0; for (Contact data : mContactList) { if (!mLetterList.contains(data.getFirstLetter())){ mLetterList.add(data.getFirstLetter()); mletterPosition.add(index); } index++; } }
接下来写一个letter_item
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/letter" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="8dp" android:layout_marginTop="8dp" android:layout_marginEnd="8dp" android:layout_marginBottom="8dp" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" tools:text="A" /> </androidx.constraintlayout.widget.ConstraintLayout>宽度我设置为了自适应
然后是我们的letterAdapter
public class LetterAdapter extends RecyclerView.Adapter<LetterAdapter.LetterHolder> { private List<String> letterList; private List<Integer> letterPosition; public LetterAdapter(List<String> letterList, List<Integer> letterPosition) { this.letterList = letterList; this.letterPosition = letterPosition; } @NonNull @Override public LetterHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.letter_item,parent,false); return new LetterHolder(view); } @Override public void onBindViewHolder(@NonNull LetterHolder holder, int position) { holder.mLetter.setText(letterList.get(position)); } @Override public int getItemCount() { return letterList.size(); } class LetterHolder extends RecyclerView.ViewHolder{ private TextView mLetter; public LetterHolder(@NonNull View itemView) { super(itemView); mLetter=itemView.findViewById(R.id.letter); } } }加载列表
private void initLetterRecyclerView() { LinearLayoutManager manager=new LinearLayoutManager(this,RecyclerView.VERTICAL,false); mRecyclerView2.setLayoutManager(manager); LetterAdapter adapter=new LetterAdapter(mLetterList,mletterPosition); mRecyclerView2.setAdapter(adapter); }实现效果
第二步就是如何让我们的字母索引，点击后，可以让联系人滑动到我们指定的位置
我们已经知道了字母索引对应的位置，可以直接在点击事件里让联系人的REcyclerView通过SmoothScrollToPositon()方法滑动到我们的指定位置即可
LetterAdapter中的onbind方法
@Override public void onBindViewHolder(@NonNull LetterHolder holder, final int position) { holder.mLetter.setText(letterList.get(position)); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { mRecyclerView.smoothScrollToPosition(letterPosition.get(position)); } }); }扩展：
这里，多点击会发现SmoothScrollToPositon()方法的实现效果有些让我不满意的地方，向下滑动，会让目标位置，出现在页面最下方，而不是页面最上方。不过这个问题可以以后解决
这里实现的效果是，打开搜索栏，会隐藏联系人列表和索引表，对搜索内容，通过正则表达式，对姓名和电话号码筛选出可能需要的联系人，添加到searchView中，然后设置一个新的RecyclerView，并填充数据
当关闭searchView时，会重新显示所有联系人
private RecyclerView mRecyclerView3; private List<Contact> searchResult; ... protected void onCreate(Bundle savedInstanceState) { ... mRecyclerView3=findViewById(R.id.recyclerView3); LinearLayoutManager manager=new LinearLayoutManager(this,RecyclerView.VERTICAL,false); mRecyclerView3.setLayoutManager(manager); ... initSearchView(); } private void initSearchView() { mSearch.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String query) { return false; } @Override public boolean onQueryTextChange(String newText) { searchResult=new ArrayList<>(); if(mRecyclerView.getVisibility()== View.VISIBLE){ mRecyclerView.setVisibility(View.GONE); mRecyclerView2.setVisibility(View.GONE); mRecyclerView3.setVisibility(View.VISIBLE); } String regx="[\\u0391-\\uFFE5]*"; String newTextRegx="[\\u0391-\\uFFE5]*"; for (int j=0;j<newText.length();j++){ String temp=newTextRegx; newTextRegx=temp+newText.charAt(j)+regx; } String regx2="[0-9]*"; String newTextRegx2="[0-9]*"; for (int j=0;j<newText.length();j++){ String temp=newTextRegx2; newTextRegx2=temp+newText.charAt(j)+regx2; } Log.i("newTextRegx2=", newTextRegx2); Log.i("newTextRegx1=", newTextRegx); for (Contact data : mContactList) { if (data.getName().matches(newTextRegx)){ searchResult.add(data); Log.i("add", data.getName()); }else if (data.getPhone().matches(newTextRegx2)){ searchResult.add(data); Log.i("add", data.getPhone()); } } ContactAdapter adapter=new ContactAdapter(searchResult); mRecyclerView3.setAdapter(adapter); return true; } }); mSearch.setOnCloseListener(new SearchView.OnCloseListener() { @Override public boolean onClose() { mRecyclerView.setVisibility(View.VISIBLE); mRecyclerView2.setVisibility(View.VISIBLE); mRecyclerView3.setVisibility(View.GONE); return false; } }); }附上源地址
github contactList_java
https://github.com/wwqby/ContactList_java.git
再往下面，就是老版本的联系人以及一些补充的知识点，就放在这里，有时间再整理
其次,实现代码部分
一文件清单
由于adapter大同小异,这里略过
1数据文件
Contacts类
public class Contacts implements Comparable<Contacts>{ private String name; private String teleNumber; private String position; private int headPicId; private String spelling; private boolean isFirst=false; public Contacts(String name, String teleNumber, String position,int headPicId,CharacterParser characterParser) { this.name = name; this.teleNumber = teleNumber; this.position=position; this.headPicId = headPicId; characterParser.setResource(name);//通过拼音转换类,把汉字转换成拼音// this.spelling=characterParser.getSpelling(); } public String getName() { return name; } public String getTeleNumber() { return teleNumber; } public String getPosition() { return position; } public int getHeadPicId() { return headPicId; } public String getSpelling() { return spelling; } public boolean getIsFirst() { return isFirst; } public void setIsFirst(boolean isFirst) { this.isFirst = isFirst; } @Override public int compareTo(@NonNull Contacts o) { return this.spelling.compareTo(o.spelling); } @Override public String toString() { String name=getName(); return "name="+name+",isFirst="+isFirst; } }关于比较排序，Java中有Comparable接口（实现compareTo()方法）和Comparator类两种方法
参考资料
https://www.cnblogs.com/Kevin-mao/p/5912775.html
这里是让Contact实现了Compareable接口
对于List<Contact> list,直接调用Conllections.sort(list),即可获得排序后的list.
2.LetterData类
public class LetterData { private String letter; private int position;//记录首次出现首字母的RecyclerView中的位置// public LetterData(String letter, int position) { this.letter = letter; this.position = position; } public String getLetter() { return letter; } public void setLetter(String letter) { this.letter = letter; } public int getPosition() { return position; } public void setPosition(int position) { this.position = position; } @Override public String toString() { return "letter="+getLetter()+",position="+getPosition(); } }3.拼音转换类
资料
https://blog.csdn.net/xiaanming/article/details/12684155
如何从汉字获得拼音以及首字母
受益于资料中作者的工作，首先把汉字转换成GB2312码，然后根据GB2312的编码原则转成ASC2码，然后根据固定的汉语拼音构成，以及其对应的ASC2码库，从ASC2码转换成汉语拼音
public class CharacterParser { private static int[] pyvalue = new int[]{-20319, -20317, -20304, -20295, -20292, -20283, -20265, -20257, -20242, -20230, -20051, -20036, -20032, -20026, -20002, -19990, -19986, -19982, -19976, -19805, -19784, -19775, -19774, -19763, -19756, -19751, -19746, -19741, -19739, -19728, -19725, -19715, -19540, -19531, -19525, -19515, -19500, -19484, -19479, -19467, -19289, -19288, -19281, -19275, -19270, -19263, -19261, -19249, -19243, -19242, -19238, -19235, -19227, -19224, -19218, -19212, -19038, -19023, -19018, -19006, -19003, -18996, -18977, -18961, -18952, -18783, -18774, -18773, -18763, -18756, -18741, -18735, -18731, -18722, -18710, -18697, -18696, -18526, -18518, -18501, -18490, -18478, -18463, -18448, -18447, -18446, -18239, -18237, -18231, -18220, -18211, -18201, -18184, -18183, -18181, -18012, -17997, -17988, -17970, -17964, -17961, -17950, -17947, -17931, -17928, -17922, -17759, -17752, -17733, -17730, -17721, -17703, -17701, -17697, -17692, -17683, -17676, -17496, -17487, -17482, -17468, -17454, -17433, -17427, -17417, -17202, -17185, -16983, -16970, -16942, -16915, -16733, -16708, -16706, -16689, -16664, -16657, -16647, -16474, -16470, -16465, -16459, -16452, -16448, -16433, -16429, -16427, -16423, -16419, -16412, -16407, -16403, -16401, -16393, -16220, -16216, -16212, -16205, -16202, -16187, -16180, -16171, -16169, -16158, -16155, -15959, -15958, -15944, -15933, -15920, -15915, -15903, -15889, -15878, -15707, -15701, -15681, -15667, -15661, -15659, -15652, -15640, -15631, -15625, -15454, -15448, -15436, -15435, -15419, -15416, -15408, -15394, -15385, -15377, -15375, -15369, -15363, -15362, -15183, -15180, -15165, -15158, -15153, -15150, -15149, -15144, -15143, -15141, -15140, -15139, -15128, -15121, -15119, -15117, -15110, -15109, -14941, -14937, -14933, -14930, -14929, -14928, -14926, -14922, -14921, -14914, -14908, -14902, -14894, -14889, -14882, -14873, -14871, -14857, -14678, -14674, -14670, -14668, -14663, -14654, -14645, -14630, -14594, -14429, -14407, -14399, -14384, -14379, -14368, -14355, -14353, -14345, -14170, -14159, -14151, -14149, -14145, -14140, -14137, -14135, -14125, -14123, -14122, -14112, -14109, -14099, -14097, -14094, -14092, -14090, -14087, -14083, -13917, -13914, -13910, -13907, -13906, -13905, -13896, -13894, -13878, -13870, -13859, -13847, -13831, -13658, -13611, -13601, -13406, -13404, -13400, -13398, -13395, -13391, -13387, -13383, -13367, -13359, -13356, -13343, -13340, -13329, -13326, -13318, -13147, -13138, -13120, -13107, -13096, -13095, -13091, -13076, -13068, -13063, -13060, -12888, -12875, -12871, -12860, -12858, -12852, -12849, -12838, -12831, -12829, -12812, -12802, -12607, -12597, -12594, -12585, -12556, -12359, -12346, -12320, -12300, -12120, -12099, -12089, -12074, -12067, -12058, -12039, -11867, -11861, -11847, -11831, -11798, -11781, -11604, -11589, -11536, -11358, -11340, -11339, -11324, -11303, -11097, -11077, -11067, -11055, -11052, -11045, -11041, -11038, -11024, -11020, -11019, -11018, -11014, -10838, -10832, -10815, -10800, -10790, -10780, -10764, -10587, -10544, -10533, -10519, -10331, -10329, -10328, -10322, -10315, -10309, -10307, -10296, -10281, -10274, -10270, -10262, -10260, -10256, -10254}; public static String[] pystr = new String[]{"a", "ai", "an", "ang", "ao", "ba", "bai", "ban", "bang", "bao", "bei", "ben", "beng", "bi", "bian", "biao", "bie", "bin", "bing", "bo", "bu", "ca", "cai", "can", "cang", "cao", "ce", "ceng", "cha", "chai", "chan", "chang", "chao", "che", "chen", "cheng", "chi", "chong", "chou", "chu", "chuai", "chuan", "chuang", "chui", "chun", "chuo", "ci", "cong", "cou", "cu", "cuan", "cui", "cun", "cuo", "da", "dai", "dan", "dang", "dao", "de", "deng", "di", "dian", "diao", "die", "ding", "diu", "dong", "dou", "du", "duan", "dui", "dun", "duo", "e", "en", "er", "fa", "fan", "fang", "fei", "fen", "feng", "fo", "fou", "fu", "ga", "gai", "gan", "gang", "gao", "ge", "gei", "gen", "geng", "gong", "gou", "gu", "gua", "guai", "guan", "guang", "gui", "gun", "guo", "ha", "hai", "han", "hang", "hao", "he", "hei", "hen", "heng", "hong", "hou", "hu", "hua", "huai", "huan", "huang", "hui", "hun", "huo", "ji", "jia", "jian", "jiang", "jiao", "jie", "jin", "jing", "jiong", "jiu", "ju", "juan", "jue", "jun", "ka", "kai", "kan", "kang", "kao", "ke", "ken", "keng", "kong", "kou", "ku", "kua", "kuai", "kuan", "kuang", "kui", "kun", "kuo", "la", "lai", "lan", "lang", "lao", "le", "lei", "leng", "li", "lia", "lian", "liang", "liao", "lie", "lin", "ling", "liu", "long", "lou", "lu", "lv", "luan", "lue", "lun", "luo", "ma", "mai", "man", "mang", "mao", "me", "mei", "men", "meng", "mi", "mian", "miao", "mie", "min", "ming", "miu", "mo", "mou", "mu", "na", "nai", "nan", "nang", "nao", "ne", "nei", "nen", "neng", "ni", "nian", "niang", "niao", "nie", "nin", "ning", "niu", "nong", "nu", "nv", "nuan", "nue", "nuo", "o", "ou", "pa", "pai", "pan", "pang", "pao", "pei", "pen", "peng", "pi", "pian", "piao", "pie", "pin", "ping", "po", "pu", "qi", "qia", "qian", "qiang", "qiao", "qie", "qin", "qing", "qiong", "qiu", "qu", "quan", "que", "qun", "ran", "rang", "rao", "re", "ren", "reng", "ri", "rong", "rou", "ru", "ruan", "rui", "run", "ruo", "sa", "sai", "san", "sang", "sao", "se", "sen", "seng", "sha", "shai", "shan", "shang", "shao", "she", "shen", "sheng", "shi", "shou", "shu", "shua", "shuai", "shuan", "shuang", "shui", "shun", "shuo", "si", "song", "sou", "su", "suan", "sui", "sun", "suo", "ta", "tai", "tan", "tang", "tao", "te", "teng", "ti", "tian", "tiao", "tie", "ting", "tong", "tou", "tu", "tuan", "tui", "tun", "tuo", "wa", "wai", "wan", "wang", "wei", "wen", "weng", "wo", "wu", "xi", "xia", "xian", "xiang", "xiao", "xie", "xin", "xing", "xiong", "xiu", "xu", "xuan", "xue", "xun", "ya", "yan", "yang", "yao", "ye", "yi", "yin", "ying", "yo", "yong", "you", "yu", "yuan", "yue", "yun", "za", "zai", "zan", "zang", "zao", "ze", "zei", "zen", "zeng", "zha", "zhai", "zhan", "zhang", "zhao", "zhe", "zhen", "zheng", "zhi", "zhong", "zhou", "zhu", "zhua", "zhuai", "zhuan", "zhuang", "zhui", "zhun", "zhuo", "zi", "zong", "zou", "zu", "zuan", "zui", "zun", "zuo"}; private StringBuilder buffer; private String resource; private static CharacterParser characterParser = new CharacterParser(); public static CharacterParser getInstance() { return characterParser; } public String getResource() { return resource; } public void setResource(String resource) { this.resource = resource; } /** * 汉字转成ASCII码 * * @param chs * @return */ private int getChsAscii(String chs) { int asc = 0; try { byte[] bytes = chs.getBytes("GB2312"); if (bytes == null || bytes.length > 2 || bytes.length <= 0) { throw new RuntimeException("illegal resource string"); } if (bytes.length == 1) { asc = bytes[0]; } if (bytes.length == 2) { int hightByte = 256 + bytes[0]; int lowByte = 256 + bytes[1]; asc = (256 * hightByte + lowByte) - 256 * 256; } } catch (Exception e) { System.out.println("ERROR:ChineseSpelling.class-getChsAscii(String chs)" + e); } return asc; } /** * 单字解析 * * @param str * @return */ public String convert(String str) { String result = null; int ascii = getChsAscii(str); if (ascii > 0 && ascii < 160) { result = String.valueOf((char) ascii); } else { for (int i = (pyvalue.length - 1); i >= 0; i--) { if (pyvalue[i] <= ascii) { result = pystr[i]; break; } } } return result; } /** * 词组解析 * * @param chs * @return */ public String getSelling(String chs) { String key, value; buffer = new StringBuilder(); for (int i = 0; i < chs.length(); i++) { key = chs.substring(i, i + 1); if (key.getBytes().length >= 2) { value = (String) convert(key); if (value == null) { value = "unknown"; } } else { value = key; } buffer.append(value); } return buffer.toString(); } public String getSpelling() { return this.getSelling(this.getResource()); } }关于gb2312，参考
http://xuepengcheng.iteye.com/blog/854739
https://www.cnblogs.com/hehheai/p/6510879.html
gb2312首先判断byte的最高位，0，本字节就是ASC2码；1，则取两个字节作为1个汉字。这两个字节的最高位代表符号为负，即height=256+btye[0]，lower=256+byte[1]，取剩下的7位，然后height*256+lower，然后我猜测可能是需要取补码，所以需要减去256*256，即pinyinvalue字库的来源
4活动文件
public class ContactsFragment extends Fragment{ @BindView(R.id.sv_search_contacts) SearchView svSearchContacts; @BindView(R.id.rv_my_contacts) RecyclerView rvMyContacts; @BindView(R.id.lv_first_letter) ListView lvFirstLetter; Unbinder unbinder; //Rv填充的联系人列表 private List<Contacts> contactsList = new ArrayList<>(); //Lv填充的首字母清单 private List<String> letterList=new ArrayList<>(); //lv真正填充的首字母列表 private List<LetterData> letterDataList=new ArrayList<>(); // 拼音工具类实例 private CharacterParser characterParser=CharacterParser.getInstance(); private String TAG = "ContactsFragment"; // RV滚动监听需要的布局管理器 private LinearLayoutManager linear; // RV滚动监听的标志位 private boolean move=false; // RV滚动监听的目的位置 private int toPosition; public ContactsFragment() { // Required empty public constructor } public static ContactsFragment newInstance() { ContactsFragment fragment = new ContactsFragment(); Bundle args = new Bundle(); fragment.setArguments(args); return fragment; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // TODO test contactsList.add(new Contacts("王小明","15001243836","组员",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("王大明","15001243836","组员",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("陈文山","15001243836","组长",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("方文山","15001243836","组长",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("张鹏","15001243836","组员",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("张大大","15001243836","组员",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("李业辉","15001243836","组员",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("李登","15001243836","组员",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("尤利","15001243836","组员",R.drawable.pressed,characterParser)); contactsList.add(new Contacts("尤东升","15001243836","组员",R.drawable.pressed,characterParser)); // 排序 Collections.sort(contactsList); LogUtil.i(TAG, "onCreate: "+contactsList.toString()); // 初始化letterDataList letterDataList=initLetterList(contactsList); } private List<LetterData> initLetterList(List<Contacts> contactsList) { for (int i=0;i<contactsList.size();i++){ String letter=contactsList.get(i).getSpelling().substring(0,1).toUpperCase(); LogUtil.i(TAG, "initLetterList: letter="+letter); if (!letterList.contains(letter)){ letterList.add(letter); LetterData letterData=new LetterData(letter,i); letterDataList.add(letterData); contactsList.get(i).setIsFirst(true); LogUtil.i(TAG, "initLetterList: position="+i); } } LogUtil.i(TAG, "initLetterList: letterList="+letterList.toString()); LogUtil.i(TAG, "initLetterList: letterDataList="+letterDataList.toString()); LogUtil.i(TAG, "initLetterList: contactsList="+contactsList.toString()); return letterDataList; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_contacts, container, false); unbinder = ButterKnife.bind(this, view); // 为RV和LV加载数据 linear=new LinearLayoutManager(getContext(),LinearLayoutManager.VERTICAL,false); rvMyContacts.setLayoutManager(linear); ContactsAdapter adapter=new ContactsAdapter(contactsList); rvMyContacts.setAdapter(adapter); LetterDataAdapter adapter2=new LetterDataAdapter(getContext(),R.layout.layout_letter,letterDataList); lvFirstLetter.setAdapter(adapter2); // 初始化监听器 initListener(); return view; } private void initListener() { svSearchContacts.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String query) { return false; } // 搜索栏监听 @Override public boolean onQueryTextChange(String newText) { List<Contacts> searchList=new ArrayList<>(); if (newText.isEmpty()){ searchList=contactsList; }else { for (Contacts contacts:contactsList){ if (contacts.getSpelling().contains(newText)){ searchList.add(contacts); } } } ContactsAdapter adapter3=new ContactsAdapter(searchList); rvMyContacts.setAdapter(adapter3); return true; } }); // lv的点击监听 lvFirstLetter.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { LetterData letterData=letterDataList.get(position); toPosition=letterData.getPosition(); move(toPosition); } }); // 滚动监听 rvMyContacts.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); if (move){ move=false; int n=toPosition-linear.findFirstVisibleItemPosition(); if (n>0&&n<linear.getChildCount()){ int top=rvMyContacts.getChildAt(n).getTop(); rvMyContacts.smoothScrollBy(0,top); } } } }); } // lv点击中的move()方法,主要是重用了smoothScrollBy()方法 private void move(int position) { int first=linear.findFirstVisibleItemPosition(); int last=linear.findLastVisibleItemPosition(); LogUtil.i(TAG, "move: position="+position); LogUtil.i(TAG, "move: first="+first); LogUtil.i(TAG, "move: last="+last); if (position<first){ rvMyContacts.smoothScrollToPosition(position); LogUtil.i(TAG, "move: first front"); }else if (position<=last){ int top=rvMyContacts.getChildAt(position-first).getTop(); rvMyContacts.smoothScrollBy(0,top); LogUtil.i(TAG, "move: top="+top); }else if (position>last){ rvMyContacts.smoothScrollToPosition(position); move=true; LogUtil.i(TAG, "move: last-first="+(last-first)); } } @Override public void onDestroyView() { super.onDestroyView(); unbinder.unbind(); } }最后是实现效果(不会上传gif图片)
填坑
1,通讯录中字母分组的角标,会出现混乱的情况
这种情况是因为Recyclerview本身的复用机制产生的.
角标的visibility属性在xml中默认为gone,
代码中设置角标时打开,visibility设置为visible
即使后续有item的角标代码中没有设置visibility属性,复用机制也会出现错位的角标
解决办法,代码中需要手动设置判断需要显示的显示,不需要显示的设置visibility为gone
参考https://segmentfault.com/q/1010000006217554?sort=created
2.实现过程中遇到的新的函数
RecyclerView.scrollToPosition(int i)直接定位滚动到指定的item位置
滚动方向:item相对于当前显示的item而定.item在屏幕上方,会从上往下滚动,直到item变成显示的第一条;item在屏幕中,不滚动;item在屏幕下方,从下往上滚动,item变成最后一条.
RecyclerView.smoothScrollToPosition(int i)增加平滑滚动的视觉效果,定位滚动到指定的item位置
RecyclerView.scrollBy(int x,int y) 按给定的坐标直接滚动到指定的位置
RecyclerView.SmoothScrollBy(int x,int y) 按给定的坐标直接滚动到指定的位置,增加平滑滚动的效果
View getChildAt(int index) 在集合中返回指定位置的视图。
int LayoutManager.findFirstVisibleItemPosition()返回RecyclerView中可见的第一个item的位置
5 种方法获取 View 的坐标{
参考https://blog.csdn.net/u013872857/article/details/53750682
View.getTop()、View.getLeft()、View.getBottom()、View.getRight();用于获取View相对于父容器的坐标
View.getX()、View.getY();获取的是View左上角相对于父容器的坐标，当View没有发生平移操作时，getX()==getLeft()、getY==getTop()。
View.getTranslationX()、View.getTranslationY();translationX与 translationY是View左上角相对于父容器的偏移量：translationX = getX() - getLeft(),当View未发生平移操作时，translationX 与translationY都为0。
View.getLocationOnScreen(int[] position);获取View相对于整个屏幕的坐标。
View.getLocationInWindow(int[] position);获取View相对于Window的坐标（忽略状态栏及ActionBar）。
}
3搜索功能
知识点1 监听搜索栏事件
处理完事件记得设置return true
svSearchContacts.setOnQueryTextListener(new SearchView.OnQueryTextListener() { //按下搜索按钮时,监听事件 @Override public boolean onQueryTextSubmit(String query) { return false; } //搜索栏text改变时监听事件 @Override public boolean onQueryTextChange(String newText) { return false; } });知识点2 正则表达式
资料参考
https://www.cnblogs.com/lzq198754/p/5780340.html
用法:
String contact...; String TextRegx...; if (contact.matches(TextRegx)) { //do something }搜索的实现
首先判断,字符是字母还是文字(不支持?!这些符号)
if ( newText.matches("[a-zA-Z]+")){ LogUtil.i(TAG, "onQueryTextChange: char"); }else{ LogUtil.i(TAG, "onQueryTextChange: text"); }[a-zA-Z]+代表 字符限制类型为大小写英文字母,+代表[]中的内容至少出现1次
然后,字母搜索的时候,我们希望对全拼中搜索是否包含搜索的字母
比如libaolong,我们可以搜索这样 lbl,bao,long,等等
我们需要先把字符串query拆分,在前后填充[a-zA-Z]* (*代表出现0-无限次,例如a[a-zA-Z]*b,代表ab中间可以出现若干长度的字母字符串,比如ab,aaaab,anmb,...)
String regx="[a-zA-Z]*"; String newTextRegx="[a-zA-Z]*"; for (int j=0;j<newText.length();j++){ String temp=newTextRegx; newTextRegx=temp+newText.charAt(j)+regx; } LogUtil.i(TAG, "onQueryTextChange: newTextRegx="+newTextRegx); for (Contact contact : contactsList) { characterParser.setResource(contact.getName()); String spell=characterParser.getSpelling(); if (spell.matches(newTextRegx)) { searchList.add(contact); } }然而不是字母的时候,我们肯定是希望用汉字来作为关键字搜索
比如李宝龙,用"李","宝","龙","李龙","宝龙","李宝"来搜索
对"李"的正则匹配
[\u0391-\uFFE5]*李[\u0391-\uFFE5]*
String regx="[\\u0391-\\uFFE5]*"; String newTextRegx="[\\u0391-\\uFFE5]*"; for (int j=0;j<newText.length();j++){ String temp=newTextRegx; newTextRegx=temp+newText.charAt(j)+regx; } LogUtil.i(TAG, "onQueryTextChange: newTextRegx="+newTextRegx); for (Contact contact : contactsList) { characterParser.setResource(contact.getName()); String spell=characterParser.getSpelling(); if (contact.getName().matches(newTextRegx)) { searchList.add(contact); } }4 listView去除下划线和背景色
https://blog.csdn.net/jq_ak47/article/details/52476020
myListView.setDividerHeight(0); myListView.setDivider(null); // XML布局文件中设置ListView的属性 //或者 android:divider="@null" //设置背景色 android:cacheColorHint=”#00000000”5.滚动监听(实现点击字母索引,跳转指定联系人组)
首先为字母索引注册点击事件
lvFirstLetter.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { LetterData letterData = letterDataList.get(position); toPosition = letterData.getPosition(); move(toPosition); } }); // lv点击中的move()方法,主要是重用了smoothScrollBy()方法 private void move(int position) { int first = linear.findFirstVisibleItemPosition(); int last = linear.findLastVisibleItemPosition(); if (position < first) { rvMyContacts.smoothScrollToPosition(position); } else if (position <= last) { int top = rvMyContacts.getChildAt(position - first).getTop(); rvMyContacts.smoothScrollBy(0, top); } else { rvMyContacts.smoothScrollToPosition(position); move=true; } } rvMyContacts.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); int first = linear.findFirstVisibleItemPosition(); View view=rvMyContacts.getChildAt(toPosition - first); if (move&&view!=null){ int top= view.getTop(); rvMyContacts.smoothScrollBy(0, top); move=false; } } });move分三种情况
当目标item在当前页面之前,直接滑动到指定item即可
当目标item在当前页面中,需要计算目标距离第一个可视item的距离,然后通过smoothScrollBy()来移动
(因为childView的索引是从0开始,所以position-first,就是第position-first+1个item)
当目标在当前页面之后,先通过smoothScrollTo()命令,会将目标item移动到当前页面最后一个,然后在利用OnScrolled()方法回调,利用move标志位,以及,当目标item存在于当前页面时(view!=null,因为复用机制,只有显示出来的item才存在view),做条件.再次计算目标到顶部的距离,然后通过smoothScrollBy()来滑动到指定位置
项目Demo地址
https://github.com/wwqby/ContactList_java.git
