城市列表

最新推荐文章于 2021-08-04 09:38:21 发布

原创最新推荐文章于 2021-08-04 09:38:21 发布 · 489 阅读

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//布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.test.MainActivity" 
    android:orientation="vertical">

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world"/>


    <FrameLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <ListView
            android:id="@+id/country_lvcountry"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_gravity="center"
            android:divider="@null" />
        <com.example.test.SideBar
            android:id="@+id/sidrbar"
            android:layout_width="30.0dip"
            android:layout_height="fill_parent"
            android:layout_gravity="right|center"/>
    </FrameLayout>

</LinearLayout>

//子布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="vertical" >
    <TextView
        android:id="@+id/catalog"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#E0E0E0"
        android:textColor="#454545"
        android:layout_weight="1.0"
        android:paddingLeft="5dip"
        android:paddingTop="5dip"
        android:paddingBottom="5dip"
        android:text="A"/>
    <TextView
        android:id="@+id/title"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center_vertical"
        android:gravity="center_vertical"
        android:layout_weight="1.0"
        android:textColor="#336598"
        android:layout_marginLeft="5dip"
        android:paddingTop="10dip"
        android:paddingBottom="10dip"
        android:text="hhhh"/>
</LinearLayout>

//适配器
package com.example.sortlistview;

import java.util.List;

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 SortAdapter extends BaseAdapter implements SectionIndexer{
    private List<SortModel> list = null;
    private Context mContext;

    public SortAdapter(Context mContext, List<SortModel> list) {
        this.mContext = mContext;
        this.list = list;
    }

    /**
     * 当ListView数据发生变化时,调用此方法来更新ListView
     * @param list
     */
    public void updateListView(List<SortModel> 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 SortModel mContent = list.get(position);
        if (view == null) {
            viewHolder = new ViewHolder();
            view = LayoutInflater.from(mContext).inflate(R.layout.item, null);
            viewHolder.tvTitle = (TextView) view.findViewById(R.id.title);
            viewHolder.tvLetter = (TextView) view.findViewById(R.id.catalog);
            view.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) view.getTag();
        }

        //根据position获取分类的首字母的Char ascii值
        int section = getSectionForPosition(position);

        //如果当前位置等于该分类首字母的Char的位置 ，则认为是第一次出现
        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;
    }


    /**
     * 根据ListView的当前位置获取分类的首字母的Char ascii值
     */
    public int getSectionForPosition(int position) {
        return list.get(position).getSortLetters().charAt(0);
    }

    /**
     * 根据分类的首字母的Char ascii值获取其第一次出现该首字母的位置
     */
    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;
    }

    /**
     * 提取英文的首字母，非英文字母用#代替。
     * 
     * @param str
     * @return
     */
    private String getAlpha(String str) {
        String  sortStr = str.trim().substring(0, 1).toUpperCase();
        // 正则表达式，判断首字母是否是英文字母
        if (sortStr.matches("[A-Z]")) {
            return sortStr;
        } else {
            return "#";
        }
    }

    @Override
    public Object[] getSections() {
        return null;
    }
}

package com.example.test;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.location.LocationClientOption.LocationMode;
import com.baidu.mapapi.SDKInitializer;
import com.example.test.SideBar.OnTouchingLetterChangedListener;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class MainActivity extends Activity {

        private ListView sortListView;
        private SideBar sideBar;
        private TextView dialog;
        private SortAdapter adapter;

        /**
         * 汉字转换成拼音的类
         */
        private CharacterParser characterParser;
        private List<SortModel> 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);
            SDKInitializer.initialize(getApplicationContext());
            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);
        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);
    }


    /**
     * 为ListView填充数据
     * @param date
     * @return
     */
    private List<SortModel> filledData(String [] date){
        List<SortModel> mSortList = new ArrayList<SortModel>();

        for(int i=0; i<date.length; 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;   
    }


}