android-wheel三级联动

在github上面有一个叫做 android-wheel 的开源控件, 代码地址https://github.com/maarek/android-wheel

源码下载地址。。。。

主界面布局

activity_main.xml

<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="wrap_content"
    android:background="#E9E9E9"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <kankan.wheel.widget.WheelView
            android:id="@+id/id_province"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" >
        </kankan.wheel.widget.WheelView>

        <kankan.wheel.widget.WheelView
            android:id="@+id/id_city"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" >
        </kankan.wheel.widget.WheelView>

        <kankan.wheel.widget.WheelView
            android:id="@+id/id_district"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" >
        </kankan.wheel.widget.WheelView>
    </LinearLayout>

    <Button
        android:id="@+id/btn_confirm"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:gravity="center"
        android:text="确定"
        android:textColor="#000000" />

</LinearLayout>

assets资源文件下--province_data.xml（一部分）

<root>
  <province name="安徽省">
    <city name="安庆市">
      <district name="枞阳县" zipcode="246000" />
      <district name="大观区" zipcode="246000" />
      <district name="怀宁县" zipcode="246000" />
      <district name="潜山县" zipcode="246000" />
      <district name="宿松县" zipcode="246000" />
      <district name="太湖县" zipcode="246000" />
      <district name="桐城市" zipcode="246000" />
      <district name="望江县" zipcode="246000" />
      <district name="宜秀区" zipcode="246000" />
      <district name="迎江区" zipcode="246000" />
      <district name="岳西县" zipcode="246000" />
      <district name="其他" zipcode="246000" />
    </city>

先看省份、城市、县乡的bean类

ProvinceModel

package com.mrwujay.cascade.model;

import java.util.List;

public class ProvinceModel {
	private String name;
	private List<CityModel> cityList;
	
	public ProvinceModel() {
		super();
	}

	public ProvinceModel(String name, List<CityModel> cityList) {
		super();
		this.name = name;
		this.cityList = cityList;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public List<CityModel> getCityList() {
		return cityList;
	}

	public void setCityList(List<CityModel> cityList) {
		this.cityList = cityList;
	}

	@Override
	public String toString() {
		return "ProvinceModel [name=" + name + ", cityList=" + cityList + "]";
	}
	
}

package com.mrwujay.cascade.model;

import java.util.List;

public class CityModel {
	private String name;
	private List<DistrictModel> districtList;
	
	public CityModel() {
		super();
	}

	public CityModel(String name, List<DistrictModel> districtList) {
		super();
		this.name = name;
		this.districtList = districtList;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public List<DistrictModel> getDistrictList() {
		return districtList;
	}

	public void setDistrictList(List<DistrictModel> districtList) {
		this.districtList = districtList;
	}

	@Override
	public String toString() {
		return "CityModel [name=" + name + ", districtList=" + districtList
				+ "]";
	}
	
}

DistrictModel

package com.mrwujay.cascade.model;

public class DistrictModel {
	private String name;
	private String zipcode;
	
	public DistrictModel() {
		super();
	}

	public DistrictModel(String name, String zipcode) {
		super();
		this.name = name;
		this.zipcode = zipcode;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getZipcode() {
		return zipcode;
	}

	public void setZipcode(String zipcode) {
		this.zipcode = zipcode;
	}

	@Override
	public String toString() {
		return "DistrictModel [name=" + name + ", zipcode=" + zipcode + "]";
	}

}

看自定义的XmlParserHandler

package com.mrwujay.cascade.service;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import com.mrwujay.cascade.model.CityModel;
import com.mrwujay.cascade.model.DistrictModel;
import com.mrwujay.cascade.model.ProvinceModel;

public class XmlParserHandler extends DefaultHandler {

	/**
	 * 存储所有的解析对象
	 */
	private List<ProvinceModel> provinceList = new ArrayList<ProvinceModel>();

	public XmlParserHandler() {

	}

	/**
	 * 对外暴露的方法
	 */
	public List<ProvinceModel> getDataList() {
		return provinceList;
	}

	@Override
	public void startDocument() throws SAXException {
		// 当读到第一个开始标签的时候，会触发这个方法
	}

	ProvinceModel provinceModel = new ProvinceModel();
	CityModel cityModel = new CityModel();
	DistrictModel districtModel = new DistrictModel();
/**
 *   <province name="安徽省">
    <city name="安庆市">
      <district name="枞阳县" zipcode="246000" />
      <district name="大观区" zipcode="246000" />
      <district name="怀宁县" zipcode="246000" />
      <district name="潜山县" zipcode="246000" />
      <district name="宿松县" zipcode="246000" />
      <district name="太湖县" zipcode="246000" />
      <district name="桐城市" zipcode="246000" />
      <district name="望江县" zipcode="246000" />
      <district name="宜秀区" zipcode="246000" />
      <district name="迎江区" zipcode="246000" />
      <district name="岳西县" zipcode="246000" />
      <district name="其他" zipcode="246000" />
    </city>
 */
	@Override
	public void startElement(String uri, String localName, String qName,
			Attributes attributes) throws SAXException {
		// 当遇到开始标记的时候，调用这个方法
		if (qName.equals("province")) {
			provinceModel = new ProvinceModel();
			provinceModel.setName(attributes.getValue(0));
			provinceModel.setCityList(new ArrayList<CityModel>());
		} else if (qName.equals("city")) {
			cityModel = new CityModel();
			cityModel.setName(attributes.getValue(0));
			cityModel.setDistrictList(new ArrayList<DistrictModel>());
		} else if (qName.equals("district")) {
			districtModel = new DistrictModel();
			districtModel.setName(attributes.getValue(0));
			districtModel.setZipcode(attributes.getValue(1));
		}
	}

	@Override
	public void endElement(String uri, String localName, String qName)
			throws SAXException {
		// 遇到结束标记的时候，会调用这个方法
		if (qName.equals("district")) {
			cityModel.getDistrictList().add(districtModel);
		} else if (qName.equals("city")) {
			provinceModel.getCityList().add(cityModel);
		} else if (qName.equals("province")) {
			provinceList.add(provinceModel);
		}
	}

	@Override
	public void characters(char[] ch, int start, int length)
			throws SAXException {
	}

}

接下来看基类BaseActivity

package com.mrwujay.cascade.activity;

import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import android.app.Activity;
import android.content.res.AssetManager;

import com.mrwujay.cascade.model.CityModel;
import com.mrwujay.cascade.model.DistrictModel;
import com.mrwujay.cascade.model.ProvinceModel;
import com.mrwujay.cascade.service.XmlParserHandler;

public class BaseActivity extends Activity {

	/**
	 * 所有省
	 */
	protected String[] mProvinceDatas;
	/**
	 * key - 省 value - 市
	 */
	protected Map<String, String[]> mCitisDatasMap = new HashMap<String, String[]>();
	/**
	 * key - 市 values - 区
	 */
	protected Map<String, String[]> mDistrictDatasMap = new HashMap<String, String[]>();

	/**
	 * key - 区 values - 邮编
	 */
	protected Map<String, String> mZipcodeDatasMap = new HashMap<String, String>();

	/**
	 * 当前省的名称
	 */
	protected String mCurrentProviceName;
	/**
	 * 当前市的名称
	 */
	protected String mCurrentCityName;
	/**
	 * 当前区的名称
	 */
	protected String mCurrentDistrictName = "";

	/**
	 * 当前区的邮政编码
	 */
	protected String mCurrentZipCode = "";

	/**
	 * 解析省市区的XML数据
	 */

	protected void initProvinceDatas() {
		//省份集合列表
		List<ProvinceModel> provinceList = null;
		//获取资源
		AssetManager asset = getAssets();
		try {
			//获取输入流
			InputStream input = asset.open("province_data.xml");
			// 创建一个解析xml的工厂对象
			SAXParserFactory spf = SAXParserFactory.newInstance();
			// 解析xml
			SAXParser parser = spf.newSAXParser();
			//解析工具
			XmlParserHandler handler = new XmlParserHandler();
			//进行解析
			parser.parse(input, handler);
			input.close();
			// 获取解析出来的数据
			provinceList = handler.getDataList();
			// */ 初始化默认选中的省、市、区
			if (provinceList != null && !provinceList.isEmpty()) {
				//获取第一个省份
				mCurrentProviceName = provinceList.get(0).getName();
				List<CityModel> cityList = provinceList.get(0).getCityList();
				if (cityList != null && !cityList.isEmpty()) {
					//获取第一个省份的第一个城市名
					mCurrentCityName = cityList.get(0).getName();
					List<DistrictModel> districtList = cityList.get(0)
							.getDistrictList();
					//获取第一个省份的第一个城市的第一个县名称
					mCurrentDistrictName = districtList.get(0).getName();
					mCurrentZipCode = districtList.get(0).getZipcode();
				}
			}
			// */
			mProvinceDatas = new String[provinceList.size()];
			for (int i = 0; i < provinceList.size(); i++) {
				// 遍历所有省的数据
				mProvinceDatas[i] = provinceList.get(i).getName();
				
				List<CityModel> cityList = provinceList.get(i).getCityList();
				String[] cityNames = new String[cityList.size()];
				for (int j = 0; j < cityList.size(); j++) {
					// 遍历省下面的所有市的数据
					cityNames[j] = cityList.get(j).getName();
					List<DistrictModel> districtList = cityList.get(j)
							.getDistrictList();
					String[] distrinctNameArray = new String[districtList
							.size()];
					DistrictModel[] distrinctArray = new DistrictModel[districtList
							.size()];
					for (int k = 0; k < districtList.size(); k++) {
						// 遍历市下面所有区/县的数据
						DistrictModel districtModel = new DistrictModel(
								districtList.get(k).getName(), districtList
										.get(k).getZipcode());
						// 区/县对于的邮编，保存到mZipcodeDatasMap
						mZipcodeDatasMap.put(districtList.get(k).getName(),
								districtList.get(k).getZipcode());
						distrinctArray[k] = districtModel;
						distrinctNameArray[k] = districtModel.getName();
					}
					// 市-区/县的数据，保存到mDistrictDatasMap
					mDistrictDatasMap.put(cityNames[j], distrinctNameArray);
				}
				// 省-市的数据，保存到mCitisDatasMap
				mCitisDatasMap.put(provinceList.get(i).getName(), cityNames);
			}
		} catch (Throwable e) {
			e.printStackTrace();
		} finally {

		}
	}

}

主界面MainActivity

package com.mrwujay.cascade.activity;

import com.mrwujay.cascade.R;
import com.mrwujay.cascade.R.id;
import com.mrwujay.cascade.R.layout;

import kankan.wheel.widget.OnWheelChangedListener;
import kankan.wheel.widget.WheelView;
import kankan.wheel.widget.adapters.ArrayWheelAdapter;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends BaseActivity implements OnClickListener, OnWheelChangedListener {
	private WheelView mViewProvince;
	private WheelView mViewCity;
	private WheelView mViewDistrict;
	private Button mBtnConfirm;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		setUpViews();
		setUpListener();
		setUpData();
	}
	
	private void setUpViews() {
		mViewProvince = (WheelView) findViewById(R.id.id_province);
		mViewCity = (WheelView) findViewById(R.id.id_city);
		mViewDistrict = (WheelView) findViewById(R.id.id_district);
		mBtnConfirm = (Button) findViewById(R.id.btn_confirm);
	}
	
	private void setUpListener() {
    	// 添加change事件
    	mViewProvince.addChangingListener(this);
    	// 添加change事件
    	mViewCity.addChangingListener(this);
    	// 添加change事件
    	mViewDistrict.addChangingListener(this);
    	// 添加onclick事件
    	mBtnConfirm.setOnClickListener(this);
    }
	
	private void setUpData() {
		initProvinceDatas();
		mViewProvince.setViewAdapter(new ArrayWheelAdapter<String>(MainActivity.this, mProvinceDatas));
		// 设置可见条目数量
		mViewProvince.setVisibleItems(7);
		mViewCity.setVisibleItems(7);
		mViewDistrict.setVisibleItems(7);
		updateCities();
		updateAreas();
	}

	/**
	 * 根据当前的省，更新市WheelView的信息
	 */
	private void updateCities() {
		//获取当前的省份的itme索引值
		int pCurrent = mViewProvince.getCurrentItem();
		//湖区当前省份名字
		mCurrentProviceName = mProvinceDatas[pCurrent];
		//获取该省份下面的市数组集合
		String[] cities = mCitisDatasMap.get(mCurrentProviceName);
		if (cities == null) {
			cities = new String[] { "" };
		}
		mViewCity.setViewAdapter(new ArrayWheelAdapter<String>(this, cities));
		mViewCity.setCurrentItem(0);
		updateAreas();
	}
	/**
	 * 根据当前的市，更新区WheelView的信息
	 */
	private void updateAreas() {
		int pCurrent = mViewCity.getCurrentItem();
		mCurrentCityName = mCitisDatasMap.get(mCurrentProviceName)[pCurrent];
		String[] areas = mDistrictDatasMap.get(mCurrentCityName);

		if (areas == null) {
			areas = new String[] { "" };
		}
		mViewDistrict.setViewAdapter(new ArrayWheelAdapter<String>(this, areas));
		mViewDistrict.setCurrentItem(0);
	}

	
	
	/**
	 * 实现接口方法的回调
	 */
	@Override
	public void onChanged(WheelView wheel, int oldValue, int newValue) {
		// TODO Auto-generated method stub
		if (wheel == mViewProvince) {
			updateCities();
		} else if (wheel == mViewCity) {
			updateAreas();
		} else if (wheel == mViewDistrict) {
			//获取县的名字
			mCurrentDistrictName = mDistrictDatasMap.get(mCurrentCityName)[newValue];
			//获取县的编码
			mCurrentZipCode = mZipcodeDatasMap.get(mCurrentDistrictName);
		}
	}



	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.btn_confirm:
			showSelectedResult();
			break;
		default:
			break;
		}
	}

	private void showSelectedResult() {
		Toast.makeText(MainActivity.this, "当前选中:"+mCurrentProviceName+","+mCurrentCityName+","
				+mCurrentDistrictName+","+mCurrentZipCode, Toast.LENGTH_SHORT).show();
	}
}

还有2个drawable

wheel_bg.xml

<?xml version="1.0" encoding="utf-8"?>


<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
	
</layer-list>

wheel_val.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <gradient
        android:angle="90"
        android:centerColor="#70222222"
        android:endColor="#70EEEEEE"
        android:startColor="#70222222" />

    <stroke
        android:width="20dp"
        android:color="#FF69B4" />

</shape>