android 按字母排序的省份列表，类似通讯录的字母索引，城市列表

package com.fq.app.adapter; import com.testcontact.R; import net.sourceforge.pinyin4j.PinyinHelper; import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType; import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat; import net.sourceforge.pinyin4j.format.HanyuPinyinToneType; import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination; 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; public class ListViewAdp extends BaseAdapter implements SectionIndexer { private Context mContext; private String[] cityName; static int i; static String[] first; public ListViewAdp(Context mContext, String[] parentData) { this.mContext = mContext; this.cityName = parentData; } @Override public int getCount() { return cityName.length; } @Override public Object getItem(int position) { return cityName[position]; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { final String nickName = cityName[position]; i = position; ViewHolder viewHolder = null; if (convertView == null) { convertView = LayoutInflater.from(mContext).inflate( R.layout.contact_item, null); viewHolder = new ViewHolder(); viewHolder.tvCatalog = (TextView) convertView .findViewById(R.id.contactitem_catalog); viewHolder.tvNick = (TextView) convertView .findViewById(R.id.contactitem_nick); convertView.setTag(viewHolder); } else { viewHolder = (ViewHolder) convertView.getTag(); } String catalog = converterToFirstSpell(nickName).substring(0, 1); viewHolder.tvCatalog.setText(catalog); if (position == 0) { viewHolder.tvCatalog.setVisibility(View.VISIBLE); viewHolder.tvCatalog.setText(catalog); } else { String lastCatalog = converterToFirstSpell(cityName[position - 1]) .substring(0, 1); if (catalog.equals(lastCatalog)) { viewHolder.tvCatalog.setVisibility(View.GONE); } else { viewHolder.tvCatalog.setVisibility(View.VISIBLE); viewHolder.tvCatalog.setText(catalog); } } // viewHolder.ivAvatar.setImageResource(R.drawable.default_avatar); viewHolder.tvNick.setText(cityName[position]); return convertView; } static class ViewHolder { TextView tvCatalog; // ImageView ivAvatar; TextView tvNick; } @Override public int getPositionForSection(int section) { for (int i = 0; i < cityName.length; i++) { String l = converterToFirstSpell(cityName[i]).substring(0, 1); char firstChar = l.toUpperCase().charAt(0); if (firstChar == section) { return i; } } return -1; } @Override public int getSectionForPosition(int position) { return 1; } @Override public Object[] getSections() { return null; } public static String converterToFirstSpell(String chines) { String pinyinName = ""; char[] nameChar = chines.toCharArray(); HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat(); defaultFormat.setCaseType(HanyuPinyinCaseType.UPPERCASE); defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE); for (int i = 0; i < nameChar.length; i++) { if (nameChar[i] > 128) { try { pinyinName += PinyinHelper.toHanyuPinyinStringArray( nameChar[i], defaultFormat)[0].charAt(0); } catch (BadHanyuPinyinOutputFormatCombination e) { e.printStackTrace(); } } else { pinyinName += nameChar[i]; } } return pinyinName; } }