【实例简介】Android 实现ListView的A-Z字母排序和过滤搜索功能，实现汉字转成拼音
【实例截图】
【核心代码】
package com.example.sortlistview;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
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.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.example.sortlistview.SideBar.OnTouchingLetterChangedListener;
public class MainActivity extends Activity {
private ListView sortListView;
private SideBar sideBar;
private TextView dialog;
private SortAdapter adapter;
private ClearEditText mClearEditText;
/**
* 汉字转换成拼音的类
*/
private CharacterParser characterParser;
private List SourceDateList;
/**
* 根据拼音来排列ListView里面的数据类
*/
private PinyinComparator pinyinComparator;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
}
private void initViews() {
//实例化汉字转拼音类
characterParser = CharacterParser.getInstance();
pinyinComparator = new PinyinComparator();
sideBar = (SideBar) findViewById(R.id.sidrbar);
dialog = (TextView) findViewById(R.id.dialog);
sideBar.setTextView(dialog);
//设置右侧触摸监听
sideBar.setOnTouchingLetterChangedListener(new OnTouchingLetterChangedListener() {
@Override
public void onTouchingLetterChanged(String s) {
//该字母首次出现的位置
int position = adapter.getPositionForSection(s.charAt(0));
if(position != -1){
sortListView.setSelection(position);
}
}
});
sortListView = (ListView) findViewById(R.id.country_lvcountry);
sortListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView> parent, View view,
int position, long id) {
//这里要利用adapter.getItem(position)来获取当前position所对应的对象
Toast.makeText(getApplication(), ((SortModel)adapter.getItem(position)).getName(), Toast.LENGTH_SHORT).show();
}
});
SourceDateList = filledData(getResources().getStringArray(R.array.date));
// 根据a-z进行排序源数据
Collections.sort(SourceDateList, pinyinComparator);
adapter = new SortAdapter(this, SourceDateList);
sortListView.setAdapter(adapter);
mClearEditText = (ClearEditText) findViewById(R.id.filter_edit);
//根据输入框输入值的改变来过滤搜索
mClearEditText.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//当输入框里面的值为空，更新为原来的列表，否则为过滤数据列表
filterData(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
/**
* 为ListView填充数据
* @param date
* @return
*/
private List filledData(String [] date){
List mSortList = new ArrayList();
for(int i=0; i
SortModel sortModel = new SortModel();
sortModel.setName(date[i]);
//汉字转换成拼音
String pinyin = characterParser.getSelling(date[i]);
String sortString = pinyin.substring(0, 1).toUpperCase();
// 正则表达式，判断首字母是否是英文字母
if(sortString.matches("[A-Z]")){
sortModel.setSortLetters(sortString.toUpperCase());
}else{
sortModel.setSortLetters("#");
}
mSortList.add(sortModel);
}
return mSortList;
}
/**
* 根据输入框中的值来过滤数据并更新ListView
* @param filterStr
*/
private void filterData(String filterStr){
List filterDateList = new ArrayList();
if(TextUtils.isEmpty(filterStr)){
filterDateList = SourceDateList;
}else{
filterDateList.clear();
for(SortModel sortModel : SourceDateList){
String name = sortModel.getName();
if(name.indexOf(filterStr.toString()) != -1 || characterParser.getSelling(name).startsWith(filterStr.toString())){
filterDateList.add(sortModel);
}
}
}
// 根据a-z进行排序
Collections.sort(filterDateList, pinyinComparator);
adapter.updateListView(filterDateList);
}
}
