在上一篇文章當(dāng)中，主要學(xué)習(xí)了ListView的A-Z字母排序功能以及根據(jù)輸入框的輸入值改變來過濾搜索結(jié)果，如果輸入框里面的值為空，更新為原來的列表遗遵，否則為過濾數(shù)據(jù)列表，包括漢字轉(zhuǎn)成拼音的功能逸嘀，如果你還沒看過的話上一篇文章的話车要，可以點擊：Android 仿美團網(wǎng),探索ListView的A-Z字母排序功能實現(xiàn)選擇城市。其實對聯(lián)系人和城市列表等實現(xiàn)A-Z的排序的實現(xiàn)原理都差不多崭倘。我只是在上一篇文章的基礎(chǔ)上做了一些修改翼岁。
按照慣例先來看一下最終效果圖：
這里寫圖片描述
現(xiàn)在我們來看下項目結(jié)構(gòu)圖
這里寫圖片描述
其實很多都是和上一篇文章一樣的，我在這里就不多說啦司光，不是很明白的地方琅坡，可以看一下上一篇文章
我還是按照項目中類的順序把代碼貼出來吧
1.ContactSortModel
package com.adan.contactsdome.view;
public class ContactSortModel {
private String name;//顯示的數(shù)據(jù)
private String sortLetters;//顯示數(shù)據(jù)拼音的首字母
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSortLetters() {
return sortLetters;
}
public void setSortLetters(String sortLetters) {
this.sortLetters = sortLetters;
}
}
2.還是一樣EditTextWithDel類就不貼上代碼了Android 帶清除功能的輸入框控件EditTextWithDel
3.PinyinComparator
package com.adan.contactsdome.view;
import java.util.Comparator;
/**
* 用來對ListView中的數(shù)據(jù)根據(jù)A-Z進行排序，前面兩個if判斷主要是將不是以漢字開頭的數(shù)據(jù)放在后面
*/
public class PinyinComparator implements Comparator<ContactSortModel> {
public int compare(ContactSortModel o1, ContactSortModel o2) {
//這里主要是用來對ListView里面的數(shù)據(jù)根據(jù)ABCDEFG...來排序
if (o1.getSortLetters().equals("@")
|| o2.getSortLetters().equals("#")) {
return -1;
} else if (o1.getSortLetters().equals("#")
|| o2.getSortLetters().equals("@")) {
return 1;
} else {
return o1.getSortLetters().compareTo(o2.getSortLetters());
}
}
}
4.PinyinUtils類残家，就是第一點所講的PinYin4j.jar用于將漢字轉(zhuǎn)換為拼音啦榆俺，這里就不粘貼代碼啦，探索PinYin4j.jar將漢字轉(zhuǎn)換為拼音的基本用法
5.SideBar類就是ListView右側(cè)的字母索引View
package com.adan.contactsdome.view;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;
import com.adan.contactsdome.R;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* ListView右側(cè)的字母索引View
*/
public class SideBar extends View {
public static String[] INDEX_STRING = {"A", "B", "C", "D", "E", "F", "G", "H", "I",
"J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V",
"W", "X", "Y", "Z"};
private OnTouchingLetterChangedListener onTouchingLetterChangedListener;
private List<String> letterList;
private int choose = -1;
private Paint paint = new Paint();
private TextView mTextDialog;
public SideBar(Context context) {
this(context, null);
}
public SideBar(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SideBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
setBackgroundColor(Color.parseColor("#FFFFFF"));
letterList = Arrays.asList(INDEX_STRING);
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int height = getHeight();// 獲取對應(yīng)高度
int width = getWidth();// 獲取對應(yīng)寬度
int singleHeight = height / letterList.size();// 獲取每一個字母的高度
for (int i = 0; i < letterList.size(); i++) {
paint.setColor(Color.parseColor("#606060"));
paint.setTypeface(Typeface.DEFAULT_BOLD);
paint.setAntiAlias(true);
paint.setTextSize(20);
// 選中的狀態(tài)
if (i == choose) {
paint.setColor(Color.parseColor("#4F41FD"));
paint.setFakeBoldText(true);
}
// x坐標(biāo)等于中間-字符串寬度的一半.
float xPos = width / 2 - paint.measureText(letterList.get(i)) / 2;
float yPos = singleHeight * i + singleHeight / 2;
canvas.drawText(letterList.get(i), xPos, yPos, paint);
paint.reset();// 重置畫筆
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
final int action = event.getAction();
final float y = event.getY();// 點擊y坐標(biāo)
final int oldChoose = choose;
final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;
final int c = (int) (y / getHeight() * letterList.size());// 點擊y坐標(biāo)所占總高度的比例*b數(shù)組的長度就等于點擊b中的個數(shù).
switch (action) {
case MotionEvent.ACTION_UP:
setBackgroundColor(Color.parseColor("#FFFFFF"));
choose = -1;
invalidate();
if (mTextDialog != null) {
mTextDialog.setVisibility(View.GONE);
}
break;
default:
setBackgroundResource(R.drawable.bg_sidebar);
if (oldChoose != c) {
if (c >= 0 && c < letterList.size()) {
if (listener != null) {
listener.onTouchingLetterChanged(letterList.get(c));
}
if (mTextDialog != null) {
mTextDialog.setText(letterList.get(c));
mTextDialog.setVisibility(View.VISIBLE);
}
choose = c;
invalidate();
}
}
break;
}
return true;
}
public void setIndexText(ArrayList<String> indexStrings) {
this.letterList = indexStrings;
invalidate();
}
/**
* 為SideBar設(shè)置顯示當(dāng)前按下的字母的TextView
*
* @param mTextDialog
*/
public void setTextView(TextView mTextDialog) {
this.mTextDialog = mTextDialog;
}
/**
* 向外公開的方法
*
* @param onTouchingLetterChangedListener
*/
public void setOnTouchingLetterChangedListener(
OnTouchingLetterChangedListener onTouchingLetterChangedListener) {
this.onTouchingLetterChangedListener = onTouchingLetterChangedListener;
}
/**
* 接口
*/
public interface OnTouchingLetterChangedListener {
void onTouchingLetterChanged(String s);
}
}
6.SortAdapter數(shù)據(jù)的適配器類坞淮，這里我們需要用到的就是SectionIndexer接口茴晋，它能夠有效地幫助我們對分組進行控制。使用SectionIndexer接口需要實現(xiàn)三個方法：getSectionForPosition(int position)回窘，getPositionForSection(int section)晃跺，getSections()，我們只需要自行實現(xiàn)前面兩個方法：
（一）getSectionForPosition(int position)是根據(jù)ListView的position來找出當(dāng)前位置所在的分組
（二）getPositionForSection(int section)就是根據(jù)首字母的Char值來獲取在該ListView中第一次出現(xiàn)該首字母的位置,也就是當(dāng)前分組所在的位置
package com.adan.contactsdome;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.SectionIndexer;
import android.widget.TextView;
import com.adan.contactsdome.view.ContactSortModel;
import java.util.List;
public class SortAdapter extends BaseAdapter implements SectionIndexer {
private List<ContactSortModel> list = null;
private Context mContext;
public SortAdapter(Context mContext, List<ContactSortModel> list) {
this.mContext = mContext;
this.list = list;
}
/**
* 當(dāng)ListView數(shù)據(jù)發(fā)生變化時,調(diào)用此方法來更新ListView
*
* @param list
*/
public void updateListView(List<ContactSortModel> list) {
this.list = list;
notifyDataSetChanged();
}
public int getCount() {
return this.list.size();
}
public Object getItem(int position) {
return list.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup arg2) {
ViewHolder viewHolder = null;
final ContactSortModel mContent = list.get(position);
if (view == null) {
viewHolder = new ViewHolder();
view = LayoutInflater.from(mContext).inflate(R.layout.item_contact, null);
viewHolder.tvTitle = (TextView) view.findViewById(R.id.tv_city_name);
view.setTag(viewHolder);
viewHolder.tvLetter = (TextView) view.findViewById(R.id.tv_catagory);
} else {
viewHolder = (ViewHolder) view.getTag();
}
int section = getSectionForPosition(position);
if (position == getPositionForSection(section)) {
viewHolder.tvLetter.setVisibility(View.VISIBLE);
viewHolder.tvLetter.setText(mContent.getSortLetters());
} else {
viewHolder.tvLetter.setVisibility(View.GONE);
}
viewHolder.tvTitle.setText(this.list.get(position).getName());
return view;
}
final static class ViewHolder {
TextView tvLetter;
TextView tvTitle;
}
public int getSectionForPosition(int position) {
return list.get(position).getSortLetters().charAt(0);
}
public int getPositionForSection(int section) {
for (int i = 0; i < getCount(); i++) {
String sortStr = list.get(i).getSortLetters();
char firstChar = sortStr.toUpperCase().charAt(0);
if (firstChar == section) {
return i;
}
}
return -1;
}
@Override
public Object[] getSections() {
return null;
}
}
7.MainActivity 對EditTextWithDel設(shè)置addTextChangedListener監(jiān)聽毫玖，當(dāng)輸入框內(nèi)容發(fā)生變化根據(jù)里面的值過濾ListView，里面的值為空顯示原來的列表和給ListView添加表頭等
package com.adan.contactsdome;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.adan.contactsdome.view.ContactSortModel;
import com.adan.contactsdome.view.EditTextWithDel;
import com.adan.contactsdome.view.PinyinComparator;
import com.adan.contactsdome.view.PinyinUtils;
import com.adan.contactsdome.view.SideBar;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class MainActivity extends Activity {
private ListView sortListView;
private SideBar sideBar;
private TextView dialog, mTvTitle;
private SortAdapter adapter;
private EditTextWithDel mEtSearchName;
private List<ContactSortModel> SourceDateList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
}
private void initViews() {
mEtSearchName = (EditTextWithDel) findViewById(R.id.et_search);
sideBar = (SideBar) findViewById(R.id.sidrbar);
dialog = (TextView) findViewById(R.id.dialog);
mTvTitle = (TextView) findViewById(R.id.tv_title);
sortListView = (ListView) findViewById(R.id.lv_contact);
initDatas();
initEvents();
setAdapter();
}
private void setAdapter() {
SourceDateList = filledData(getResources().getStringArray(R.array.contacts));
Collections.sort(SourceDateList, new PinyinComparator());
adapter = new SortAdapter(this, SourceDateList);
sortListView.setAdapter(adapter);
}
private void initEvents() {
//設(shè)置右側(cè)觸摸監(jiān)聽
sideBar.setOnTouchingLetterChangedListener(new SideBar.OnTouchingLetterChangedListener() {
@Override
public void onTouchingLetterChanged(String s) {
//該字母首次出現(xiàn)的位置
int position = adapter.getPositionForSection(s.charAt(0));
if (position != -1) {
sortListView.setSelection(position + 1);
}
}
});
//ListView的點擊事件
sortListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
mTvTitle.setText(((ContactSortModel) adapter.getItem(position - 1)).getName());
Toast.makeText(getApplication(), ((ContactSortModel) adapter.getItem(position)).getName(), Toast.LENGTH_SHORT).show();
}
});
//根據(jù)輸入框輸入值的改變來過濾搜索
mEtSearchName.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//當(dāng)輸入框里面的值為空凌盯，更新為原來的列表付枫，否則為過濾數(shù)據(jù)列表
filterData(s.toString());
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
private void initDatas() {
sideBar.setTextView(dialog);
}
/**
* 根據(jù)輸入框中的值來過濾數(shù)據(jù)并更新ListView
*
* @param filterStr
*/
private void filterData(String filterStr) {
List<ContactSortModel> mSortList = new ArrayList<>();
if (TextUtils.isEmpty(filterStr)) {
mSortList = SourceDateList;
} else {
mSortList.clear();
for (ContactSortModel sortModel : SourceDateList) {
String name = sortModel.getName();
if (name.toUpperCase().indexOf(filterStr.toString().toUpperCase()) != -1 || PinyinUtils.getPingYin(name).toUpperCase().startsWith(filterStr.toString().toUpperCase())) {
mSortList.add(sortModel);
}
}
}
// 根據(jù)a-z進行排序
Collections.sort(mSortList, new PinyinComparator());
adapter.updateListView(mSortList);
}
private List<ContactSortModel> filledData(String[] date) {
List<ContactSortModel> mSortList = new ArrayList<>();
ArrayList<String> indexString = new ArrayList<>();
for (int i = 0; i < date.length; i++) {
ContactSortModel sortModel = new ContactSortModel();
sortModel.setName(date[i]);
String pinyin = PinyinUtils.getPingYin(date[i]);
String sortString = pinyin.substring(0, 1).toUpperCase();
if (sortString.matches("[A-Z]")) {
sortModel.setSortLetters(sortString.toUpperCase());
if (!indexString.contains(sortString)) {
indexString.add(sortString);
}
}
mSortList.add(sortModel);
}
Collections.sort(indexString);
sideBar.setIndexText(indexString);
return mSortList;
}
}
布局文件就不貼出來了，現(xiàn)在看來是不是比上一篇還簡單了呢
源代碼請戳這里：Android 使用ListView的A-Z字母排序功能實現(xiàn)聯(lián)系人模塊
