android-wheel实现省、市、地区联动选择效果
我们都知道在IOS里面有个滚轮选择器,在Android中有人也实现了一个类似的,叫android-wheel。不过个人感觉实现的还是有点粗糙,这个后面再说。android-wheel给出了好几个不同类型的demo,不过里面的demo有个时间选择器(年月日选择)。没用过的可以去看看里面的demo,应对一般的都没什么大碍。由于公司项目要省、市、地区选择的功能,还要和IOS日期选择器一样,所以就研究了下android-wheel。下面说说我是如何实现省、市、地区选择的功能,还望大家指出其中的不足一起讨论。
首先是xml布局 (Activity_main.xml)
在Activity_main.xml 文件中布局三个滚轮控件和一个按钮,三个滚轮分别是省、市、地区选择滚轮。最后按下按钮的时候Toast显示选择的省市地区和所选择的地址在数据库中的key。<LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android"android:layout_height= "fill_parent"android:layout_width= "fill_parent"android:orientation= "vertical"android:background= "@drawable/layout_bg" ><LinearLayoutandroid:layout_height= "wrap_content"android:layout_width= "wrap_content"android:layout_gravity= "center_horizontal"android:paddingTop= "30dp" ><kankan.wheel.widget.WheelView android:id= "@+id/provice"android:layout_height= "wrap_content"android:layout_width= "wrap_content"android:minWidth= "100dp"/><kankan.wheel.widget.WheelView android:id= "@+id/city"android:layout_height= "wrap_content"android:layout_width= "100dp" /><kankan.wheel.widget.WheelView android:id= "@+id/area"android:layout_height= "wrap_content"android:layout_width= "wrap_content" /></LinearLayout><Buttonandroid:id= "@+id/btnOK"android:layout_width= "match_parent"android:layout_height= "wrap_content"android:layout_marginTop= "30dp"android:text= "确定"/></LinearLayout>
数据库里面的数据是有一定查询规则的,如图所示:
DQXX03为1,2,3分别代表省(直辖市)、市、地区。所以要获得所有省只需查询DQXX03为1就行了。如果要查询某个省下面的市呢?比如要查询河北省的所有市,可以这么写sql语句 select DQX_DQXX01 from DQXX where DQXX02="河北省"; 这样就查出来了河北省对应的DQX_DQXX01的值为13,然后根据这个值在通过select DQXX01,DQXX02 from DQXX where DQX_DQXX01=13 就查询出来了每个市的对应键DQXX01的值为1301,1302,1303.......,查询地区也是类似的,这个时候根据DQX_DQXX01=1301或者1302.....查询对应的地区。最后省,市,地区连接起来就是DQXX05列里面的值,我们只要查询下就可以知道唯一地址DQXX01的值。
下面是主Activity文件
- package com.wheeltest;
- import java.io.IOException;
- import java.util.Map;
- import kankan.wheel.widget.OnWheelScrollListener;
- import kankan.wheel.widget.WheelView;
- import kankan.wheel.widget.adapters.ArrayWheelAdapter;
- import android.os.Bundle;
- import android.os.Handler;
- import android.app.Activity;
- import android.content.Context;
- import android.database.sqlite.SQLiteDatabase;
- import android.graphics.Typeface;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.TextView;
- import android.widget.Toast;
- public class MainActivity extends Activity {
- private static final String TAG = "MainActivity";
- private static final String DBNAME = "dqxx.sqlite";
- private static final String TABLE_NAME = "dqxx";
- private SQLiteDatabase db;
- private Map<String, Integer> provinceMap;
- private Map<String, Integer> cityMap;
- private Map<String, Integer> areaMap;
- private String[] provinceArray;
- private String[] cityArray;
- private String[] areaArray;
- private WheelView provinceWheelView;
- private WheelView cityWheelView;
- private WheelView areaWheelView;
- private ProviceCityAreaAdapter provinceAdapter;
- private ProviceCityAreaAdapter cityAdapter;
- private ProviceCityAreaAdapter areaAdapter;
- private Handler mHandler = new Handler();
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- initWheelView();
- findViewById(R.id.btnOK).setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View arg0) {
- mHandler.postDelayed(new Runnable() {
- @Override
- public void run() {
- StringBuilder sb = new StringBuilder();
- sb.append(provinceArray[provinceWheelView.getCurrentItem()]);
- if (provinceArray[provinceWheelView.getCurrentItem()].endsWith("市")) {
- sb.append("市辖区");
- }else {
- sb.append(cityArray[cityWheelView.getCurrentItem()]);
- }
- sb.append(areaArray[areaWheelView.getCurrentItem()]);
- Toast.makeText(MainActivity.this, sb.toString()+" key:"+DqxxUtils.findPrimaryKey(db, TABLE_NAME, sb.toString()), Toast.LENGTH_SHORT).show();
- }
- }, 400);
- }
- });
- }
- public void initWheelView() {
- provinceWheelView = (WheelView)findViewById(R.id.provice);
- cityWheelView = (WheelView)findViewById(R.id.city);
- areaWheelView = (WheelView)findViewById(R.id.area);
- //初始化省滚轮列表选择器
- initProviceMap();
- provinceAdapter = new ProviceCityAreaAdapter(MainActivity.this, provinceArray, 0);
- provinceWheelView.setViewAdapter(provinceAdapter);
- provinceWheelView.setCurrentItem(0);
- provinceWheelView.addScrollingListener(privinceScrollListener);
- //初始化城市滚轮列表选择器
- String provinceName = provinceArray[0];
- int dqx_dqxx01 = provinceMap.get(provinceName);
- if (provinceName.endsWith("市")) {
- initCityMap(dqx_dqxx01, false);
- }else {
- initCityMap(dqx_dqxx01, true);
- }
- cityAdapter = new ProviceCityAreaAdapter(MainActivity.this, cityArray, 0);
- cityWheelView.setViewAdapter(cityAdapter);
- cityWheelView.setCurrentItem(0);
- cityWheelView.addScrollingListener(cityScrollListener);
- //初始化地区滚轮列表选择器
- String cityName = cityArray[0];
- int dqx_dqxx01_2 = cityMap.get(cityName);
- provinceName = cityArray[0];
- if (provinceName.endsWith("市")) {
- dqx_dqxx01_2 = dqx_dqxx01_2 * 100 +1;
- }
- initAreaMap(dqx_dqxx01_2);
- areaAdapter = new ProviceCityAreaAdapter(MainActivity.this, areaArray, 0);
- areaWheelView.setViewAdapter(areaAdapter);
- areaWheelView.setCurrentItem(0);
- }
- OnWheelScrollListener privinceScrollListener = new OnWheelScrollListener() {
- @Override
- public void onScrollingStarted(WheelView wheel) {
- }
- @Override
- public void onScrollingFinished(WheelView wheel) {
- int currentItem = wheel.getCurrentItem();
- String provinceName = provinceArray[currentItem];
- int dqxx01 = provinceMap.get(provinceName);
- if (provinceName.endsWith("市")) {
- initCityMap(dqxx01, false);
- }else {
- initCityMap(dqxx01, true);
- }
- cityAdapter = new ProviceCityAreaAdapter(MainActivity.this, cityArray, 0);
- cityWheelView.setViewAdapter(cityAdapter);
- cityWheelView.setCurrentItem(0);
- String cityName = cityArray[0];
- int dqx_dqxx01_2 = cityMap.get(cityName);
- if (provinceName.endsWith("市")) {
- dqx_dqxx01_2 = dqx_dqxx01_2 * 100 +1;
- }
- initAreaMap(dqx_dqxx01_2);
- areaAdapter = new ProviceCityAreaAdapter(MainActivity.this, areaArray, 0);
- areaWheelView.setViewAdapter(areaAdapter);
- areaWheelView.setCurrentItem(0);
- }
- };
- OnWheelScrollListener cityScrollListener = new OnWheelScrollListener() {
- @Override
- public void onScrollingStarted(WheelView wheel) {
- }
- @Override
- public void onScrollingFinished(WheelView wheel) {
- String provinceName = provinceArray[provinceWheelView.getCurrentItem()];
- int dqx_dqxx01 = cityMap.get(cityArray[wheel.getCurrentItem()]);
- if (provinceName.endsWith("市")) {
- dqx_dqxx01 = dqx_dqxx01 * 100 +1;
- }
- initAreaMap(dqx_dqxx01);
- areaAdapter = new ProviceCityAreaAdapter(MainActivity.this, areaArray, 0);
- areaWheelView.setViewAdapter(areaAdapter);
- areaWheelView.setCurrentItem(0);
- }
- };
- public void initProviceMap() {
- try {
- DqxxUtils.copyDB(MainActivity.this, DBNAME);
- if (db == null) {
- db = openOrCreateDatabase(getFilesDir().getAbsolutePath() + "/" +DBNAME, Context.MODE_PRIVATE, null);
- }
- provinceMap = DqxxUtils.getProvince(db, TABLE_NAME);
- provinceArray = provinceMap.keySet().toArray(new String[provinceMap.size()]);
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- public void initCityMap(int dqx_dqxx01, boolean municipalities) {
- try {
- DqxxUtils.copyDB(MainActivity.this, DBNAME);
- if (db == null) {
- db = openOrCreateDatabase(getFilesDir().getAbsolutePath() + "/" +DBNAME, Context.MODE_PRIVATE, null);
- }
- cityMap = DqxxUtils.getCity(db, TABLE_NAME, dqx_dqxx01, municipalities);
- cityArray = cityMap.keySet().toArray(new String[cityMap.size()]);
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- public void initAreaMap(int dqx_dqxx01) {
- try {
- DqxxUtils.copyDB(MainActivity.this, DBNAME);
- if (db == null) {
- db = openOrCreateDatabase(getFilesDir().getAbsolutePath() + "/" +DBNAME, Context.MODE_PRIVATE, null);
- }
- areaMap = DqxxUtils.getArea(db, TABLE_NAME, dqx_dqxx01);
- areaArray = areaMap.keySet().toArray(new String[areaMap.size()]);
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- public class ProviceCityAreaAdapter extends ArrayWheelAdapter<String> {
- private int currentItem;
- private int currentValue;
- public ProviceCityAreaAdapter(Context context, String[] items, int current) {
- super(context, items);
- this.currentValue = current;
- }
- public void setCurrentValue(int value){
- this.currentValue = value;
- }
- @Override
- protected void configureTextView(TextView view) {
- super.configureTextView(view);
- // if (currentItem == currentValue) {
- // view.setTextColor(0xFF0000F0);
- // }
- view.setTypeface(Typeface.SANS_SERIF);
- }
- @Override
- public View getItem(int index, View convertView, ViewGroup parent) {
- currentItem = index;
- return super.getItem(index, convertView, parent);
- }
- }
- @Override
- protected void onDestroy() {
- if (db != null) {
- db.close();
- db = null;
- }
- super.onDestroy();
- }
最后一个类是工具类,包含一些数据库操作和文件读写的。我就不贴出来了。我已经把这个工程放到Github上去了地址https://github.com/ywenblocker/Provinces-Picker-wheel大家可以看看,有问题也欢迎提出来。最后附上一张效果图。
最后说句,该工程用到的数据库是公司项目的,不好意思,不能开源,还望见谅。除了这个其他东西都有。