安卓仿BOSS直聘的那种选择国家、地区和地区代码的列表

超、凢脫俗 2024-02-17 17:48 169阅读 0赞

最近在工作之余，挤了点时间写这篇博客，是公司项目要实现一个功能，就是：选择国家和地区还有对应的编号，类似于下拉选择联系人的列表一样的，上张图：

![这里写图片描述][20160730145026686]

#### 1.MainActivity ####

package com.city.list.main;
    
    import java.io.File;
    import java.util.ArrayList;
    
    import com.city.list.db.DBManager;
    
    import android.app.Activity;
    import android.content.Intent;
    import android.database.Cursor;
    import android.database.sqlite.SQLiteDatabase;
    import android.os.Bundle;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    
    public class MainActivity extends Activity
    {
        
        /** Called when the activity is first created. */
    
        Button btn;
    
        @Override
        public void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            btn = (Button) findViewById(R.id.selectBtn);
            btn.setOnClickListener(new OnClickListener()
            {
    
                @Override
                public void onClick(View v)
                {
                    startActivity(new Intent(MainActivity.this, CityList.class));
    
                }
            });
        }
    
    }

#### 2.CityList ####

package com.city.list.main;
    
    import android.app.Activity;
    import android.content.Context;
    import android.database.Cursor;
    import android.database.sqlite.SQLiteDatabase;
    import android.graphics.PixelFormat;
    import android.os.Bundle;
    import android.os.Handler;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.view.ViewGroup.LayoutParams;
    import android.view.WindowManager;
    import android.widget.AbsListView;
    import android.widget.AdapterView;
    import android.widget.AdapterView.OnItemClickListener;
    import android.widget.BaseAdapter;
    import android.widget.ListView;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import com.city.list.db.DBManager;
    import com.city.list.main.MyLetterListView.OnTouchingLetterChangedListener;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    
    
    /**
     * 城市列表
     * 
     * @author sy
     * 
     */
    public class CityList extends Activity
    {
        
        private BaseAdapter adapter;
        private ListView mCityLit;
        private TextView overlay;
        private MyLetterListView letterListView;
        private HashMap<String, Integer> alphaIndexer;// 存放存在的汉语拼音首字母和与之对应的列表位置
        private String[] sections;// 存放存在的汉语拼音首字母
        private Handler handler;
        private OverlayThread overlayThread;
        private SQLiteDatabase database;
        private ArrayList<CityModel> mCityNames;
    
        @Override
        public void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.city_list);
    
            mCityLit = (ListView) findViewById(R.id.city_list);
            letterListView = (MyLetterListView) findViewById(R.id.cityLetterListView);
            initHeaderView();
            DBManager dbManager = new DBManager(this);
            dbManager.openDateBase();
            dbManager.closeDatabase();
            database = SQLiteDatabase.openOrCreateDatabase(DBManager.DB_PATH + "/" + DBManager.DB_NAME, null);
            mCityNames = getCityNames();
            database.close();
            letterListView.setOnTouchingLetterChangedListener(new LetterListViewListener());
            alphaIndexer = new HashMap<String, Integer>();
            handler = new Handler();
            overlayThread = new OverlayThread();
            initOverlay();
            setAdapter(mCityNames);
            mCityLit.setOnItemClickListener(new CityListOnItemClick());
    
        }
    
        private void initHeaderView() {
            AbsListView.LayoutParams localLayoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            View headerView = View.inflate(this, R.layout.header_view, null);
            headerView.setLayoutParams(localLayoutParams);
            mCityLit.addHeaderView(headerView);
        }
    
        /**
         * 从数据库获取城市数据
         * 
         * @return
         */
        private ArrayList<CityModel> getCityNames()
        {
            ArrayList<CityModel> names = new ArrayList<CityModel>();
            Cursor cursor = database.rawQuery("SELECT * FROM T_City ORDER BY NameSort", null);
            for (int i = 0; i < cursor.getCount(); i++)
            {
                cursor.moveToPosition(i);
                CityModel cityModel = new CityModel();
                cityModel.setCityName(cursor.getString(cursor.getColumnIndex("CityName")));
                cityModel.setNameSort(cursor.getString(cursor.getColumnIndex("NameSort")));
                cityModel.setAreaCode(cursor.getString(cursor.getColumnIndex("AreaCode")));
                names.add(cityModel);
            }
            return names;
        }
    
        /**
         * 城市列表点击事件
         * 
         * @author sy
         * 
         */
        class CityListOnItemClick implements OnItemClickListener
        {
    
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3)
            {
                if(pos!=0){
                    CityModel cityModel = (CityModel) mCityLit.getAdapter().getItem(pos);
                    Toast.makeText(CityList.this, cityModel.getCityName(), Toast.LENGTH_SHORT).show();
                }
    
            }
    
        }
    
        /**
         * 为ListView设置适配器
         * 
         * @param list
         */
        private void setAdapter(List<CityModel> list)
        {
            if (list != null)
            {
                adapter = new ListAdapter(this, list);
                mCityLit.setAdapter(adapter);
            }
    
        }
    
        /**
         * ListViewAdapter
         * 
         * @author sy
         * 
         */
        private class ListAdapter extends BaseAdapter
        {
        
            private LayoutInflater inflater;
            private List<CityModel> list;
    
            public ListAdapter(Context context, List<CityModel> list)
            {
    
                this.inflater = LayoutInflater.from(context);
                this.list = list;
                alphaIndexer = new HashMap<String, Integer>();
                sections = new String[list.size()];
    
                for (int i = 0; i < list.size(); i++)
                {
                    // 当前汉语拼音首字母
                    // getAlpha(list.get(i));
                    String currentStr = list.get(i).getNameSort();
                    // 上一个汉语拼音首字母，如果不存在为“ ”
                    String previewStr = (i - 1) >= 0 ? list.get(i - 1).getNameSort() : " ";
                    if (!previewStr.equals(currentStr))
                    {
                        String name = list.get(i).getNameSort();
                        alphaIndexer.put(name, i);
                        sections[i] = name;
                    }
                }
    
            }
    
            @Override
            public int getCount()
            {
                return list.size();
            }
    
            @Override
            public Object getItem(int position)
            {
                return list.get(position);
            }
    
            @Override
            public long getItemId(int position)
            {
                return position;
            }
    
            @Override
            public View getView(int position, View convertView, ViewGroup parent)
            {
                ViewHolder holder;
                if (convertView == null)
                {
                    convertView = inflater.inflate(R.layout.list_item, null);
                    holder = new ViewHolder();
                    holder.alpha = (TextView) convertView.findViewById(R.id.alpha);
                    holder.name = (TextView) convertView.findViewById(R.id.name);
                    holder.code = (TextView) convertView.findViewById(R.id.code);
                    holder.view_item_top_line =convertView.findViewById(R.id.view_item_top_line);
                    convertView.setTag(holder);
                } else
                {
                    holder = (ViewHolder) convertView.getTag();
                }
    
                holder.name.setText(list.get(position).getCityName());
                holder.code.setText(list.get(position).getAreaCode());
                String currentStr = list.get(position).getNameSort();
                String previewStr = (position - 1) >= 0 ? list.get(position - 1).getNameSort() : " ";
                if (!previewStr.equals(currentStr))
                {
                    holder.alpha.setVisibility(View.VISIBLE);
                    holder.alpha.setText(currentStr);
                    holder.view_item_top_line.setVisibility(View.GONE);
                } else
                {
                    holder.alpha.setVisibility(View.GONE);
                    holder.view_item_top_line.setVisibility(View.VISIBLE);
                }
                return convertView;
            }
    
            private class ViewHolder
            {
        
                TextView alpha;
                TextView name;
                TextView code;
                View view_item_top_line;
            }
    
        }
    
        // 初始化汉语拼音首字母弹出提示框
        private void initOverlay()
        {
            LayoutInflater inflater = LayoutInflater.from(this);
            overlay = (TextView) inflater.inflate(R.layout.overlay, null);
            overlay.setVisibility(View.INVISIBLE);
            WindowManager.LayoutParams lp = new WindowManager.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,
                    WindowManager.LayoutParams.TYPE_APPLICATION, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
                    PixelFormat.TRANSLUCENT);
            WindowManager windowManager = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
            windowManager.addView(overlay, lp);
        }
    
        private class LetterListViewListener implements OnTouchingLetterChangedListener
        {
        
    
            @Override
            public void onTouchingLetterChanged(final String s)
            {
                if (alphaIndexer.get(s) != null)
                {
                    int position = alphaIndexer.get(s);
                    mCityLit.setSelection(position+1);
                    overlay.setText(sections[position]);
                    overlay.setVisibility(View.VISIBLE);
                    handler.removeCallbacks(overlayThread);
                    // 延迟一秒后执行，让overlay为不可见
    
                    handler.postDelayed(overlayThread, 700);
                }
            }
    
        }
    
        // 设置overlay不可见
        private class OverlayThread implements Runnable
        {
        
    
            @Override
            public void run()
            {
                overlay.setVisibility(View.GONE);
            }
    
        }
    
    }

#### 3.CityModel ####

package com.city.list.main;
    
    /**
     * 城市属性实体类
     * @author sy
     *
     */
    public class CityModel
    {
        
        private String CityName; //城市名字
        private String NameSort; //城市首字母
        private String AreaCode; //地区编号
    
        public String getAreaCode() {
            return AreaCode;
        }
    
        public void setAreaCode(String areaCode) {
            AreaCode = areaCode;
        }
    
    
    
        public String getCityName()
        {
            return CityName;
        }
    
        public void setCityName(String cityName)
        {
            CityName = cityName;
        }
    
        public String getNameSort()
        {
            return NameSort;
        }
    
        public void setNameSort(String nameSort)
        {
            NameSort = nameSort;
        }
    
    }

#### 4. MyLetterListView ####

package com.city.list.main;
    
    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;
    
    public class MyLetterListView extends View
    {
        
    
        OnTouchingLetterChangedListener onTouchingLetterChangedListener;
        String[] b = {
       "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","#" };
        int choose = -1;
        Paint paint = new Paint();
        boolean showBkg = false;
    
        public MyLetterListView(Context context, AttributeSet attrs, int defStyle)
        {
            super(context, attrs, defStyle);
        }
    
        public MyLetterListView(Context context, AttributeSet attrs)
        {
            super(context, attrs);
        }
    
        public MyLetterListView(Context context)
        {
            super(context);
        }
    
        @Override
        protected void onDraw(Canvas canvas)
        {
            super.onDraw(canvas);
            if (showBkg)
            {
                //canvas.drawColor(Color.parseColor("#f3c516"));
            }
    
            int height = getHeight();
            int width = getWidth();
            int singleHeight = height / b.length;
            for (int i = 0; i < b.length; i++)
            {
                paint.setColor(Color.parseColor("#f3c516"));
                paint.setTypeface(Typeface.DEFAULT_BOLD);
                paint.setAntiAlias(true);
                if (i == choose)
                {
                    paint.setColor(Color.parseColor("#f3c516"));
                    paint.setFakeBoldText(true);
                }
                float xPos = width / 2 - paint.measureText(b[i]) / 2;
                float yPos = singleHeight * i + singleHeight;
                paint.setTextSize(35);
                canvas.drawText(b[i], xPos, yPos, paint);
                paint.reset();
            }
    
        }
    
        @Override
        public boolean dispatchTouchEvent(MotionEvent event)
        {
            final int action = event.getAction();
            final float y = event.getY();
            final int oldChoose = choose;
            final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;
            final int c = (int) (y / getHeight() * b.length);
    
            switch (action) {
            case MotionEvent.ACTION_DOWN:
                showBkg = true;
                if (oldChoose != c && listener != null)
                {
                    if (c >= 0 && c < b.length)
                    {
                        listener.onTouchingLetterChanged(b[c]);
                        choose = c;
                        invalidate();
                    }
                }
    
                break;
            case MotionEvent.ACTION_MOVE:
                if (oldChoose != c && listener != null)
                {
                    if (c >= 0 && c < b.length)
                    {
                        listener.onTouchingLetterChanged(b[c]);
                        choose = c;
                        invalidate();
                    }
                }
                break;
            case MotionEvent.ACTION_UP:
                showBkg = false;
                choose = -1;
                invalidate();
                break;
            }
            return true;
        }
    
        @Override
        public boolean onTouchEvent(MotionEvent event)
        {
            return super.onTouchEvent(event);
        }
    
        public void setOnTouchingLetterChangedListener(OnTouchingLetterChangedListener onTouchingLetterChangedListener)
        {
            this.onTouchingLetterChangedListener = onTouchingLetterChangedListener;
        }
    
        public interface OnTouchingLetterChangedListener
        {
        
            public void onTouchingLetterChanged(String s);
        }
    
    }

#### 5.还需要将raw中得数据库文件写入到data数据库中 ####

package com.city.list.db;
    
    import android.content.Context;
    import android.database.sqlite.SQLiteDatabase;
    import android.os.Environment;
    
    import com.city.list.main.R;
    
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    
    /**
     * 将raw中得数据库文件写入到data数据库中
     * @author sy
     *
     */
    public class DBManager
    {
        
        private final int BUFFER_SIZE = 400000;
        private static final String PACKAGE_NAME = "com.city.list.main";
        public static final String DB_NAME = "china_city_name.db";
        public static final String DB_PATH = "/data" + Environment.getDataDirectory().getAbsolutePath() + "/" + PACKAGE_NAME ; // 存放路径
        private Context mContext;
        private SQLiteDatabase database;
    
        public DBManager(Context context)
        {
            this.mContext = context;
        }
    
        /**
         * 被调用方法
         */
        public void openDateBase()
        {
            this.database = this.openDateBase(DB_PATH + "/" + DB_NAME);
    
        }
    
        /**
         * 打开数据库
         * 
         * @param dbFile
         * @return SQLiteDatabase
         * @author sy
         */
        private SQLiteDatabase openDateBase(String dbFile)
        {
            File file = new File(dbFile);
            if (!file.exists())
            {
                // // 打开raw中得数据库文件，获得stream流
                InputStream stream = this.mContext.getResources().openRawResource(R.raw.china_city_name);
                try
                {
    
                    // 将获取到的stream 流写入道data中
                    FileOutputStream outputStream = new FileOutputStream(dbFile);
                    byte[] buffer = new byte[BUFFER_SIZE];
                    int count = 0;
                    while ((count = stream.read(buffer)) > 0)
                    {
                        outputStream.write(buffer, 0, count);
                    }
                    outputStream.close();
                    stream.close();
                    SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(dbFile, null);
                    return db;
                } catch (FileNotFoundException e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            return database;
        }
    
        public void closeDatabase()
        {
            if (database != null && database.isOpen())
            {
                this.database.close();
            }
        }
    }

差不多了，还有一些布局文件和raw文件夹下的文件没显示，全在项目包下，已经把项目提交到了GitHub上：[https://github.com/xinyitiandi/CityList][https_github.com_xinyitiandi_CityList]，有哪些不足之处，大家可以指正哦，这次写的匆忙，没有加太多的文字说明，实在没有太多的时间了，请大家谅解！

[20160730145026686]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/30/c147bd303cad48899846034bafc88ea8.png
[https_github.com_xinyitiandi_CityList]: https://github.com/xinyitiandi/CityList