Android-wheel control realizes three-level linkage effect _android

This example for you to share the Android wheel provinces and cities three-level linkage effect for your reference, the specific content as follows

On the GitHub, there is an open source control called Android-wheel, code address: Https://github.com/maarek/android-wheel

SOURCE Download Address: Http://xiazai.jb51.net/201610/yuanma/AndroidCascadeMaster (jb51.net). rar

Main interface Layout

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:backg" 
    Round= "#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" a 
      ndroid: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:lay out_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.wh eelview> </LinearLayout> <button android:id= "@+id/btn_confirm" android:layout_width= "Match_p" 
    Arent "android:layout_height=" wrap_content "android:layout_margintop=" 10dip "android:gravity=" center " 
 android:text= "OK" android:textcolor= "#000000"/> </LinearLayout>

Assets resource File--province_data.xml (part of)

<root> 
 <province name= "Anhui Province" > 
  <city name= "Anqing" > 
   <district name= "Congyang County" zipcode= " 246000 "/> <district name=" Daguan District "zipcode=" 246000 "/> <district name=" Huaining County "zipcode=" 246000 "/> 
   <district name= "Qianshan County" zipcode= "246000"/> <district name= 
   "Susong County" zipcode= "246000"/> 
   < District name= "Taihu County" zipcode= "246000"/> <district name= 
   "Tongcheng" zipcode= "246000"/> 
   <district "Wangjiang County" zipcode= "246000"/> 
   <district name= "Yi Xiu qu" zipcode= "246000"/> <district name= "Yinjiang District" ZipCode 
   = "246000"/> 
   <district name= "Yuexi County" zipcode= "246000"/> "<district name=" " 
   Other" zipcode= "246000"/ > 
  </city> 

First look at the provinces, cities, counties and villages Bean class
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 + "]"; 
  } 
 
} 

Look at the custom 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 {/** * stores all resolved objects/private List<provincemodel&gt ; 
 
  Provincelist = new arraylist<provincemodel> (); 
    Public Xmlparserhandler () {}/** * External exposure method * * Public list<provincemodel> getdatalist () { 
  return provincelist; @Override public void Startdocument () throws Saxexception {//When the first start tag is read, this method is triggered} Provincemode 
  L Provincemodel = new Provincemodel (); 
  Citymodel Citymodel = new Citymodel (); 
Districtmodel Districtmodel = new Districtmodel (); /** * <province name= "Anhui Province" > <city name= "Anqing" > 
   <district name= "Congyang County" zipcode= "246000"/> <district name= "Daguan District" zipcode= "246000"/> <district na Me= "Huaining County" zipcode= "246000"/> <district name= "Qianshan County" zipcode= "246000"/> <district name= "Susong County" zipcode= "24 6000 "/> <district name=" Taihu County "zipcode=" 246000 "/> <district name=" Tongcheng "zipcode=" 246000 "/> < District name= "Wangjiang County" zipcode= "246000"/> <district "Yi Xiu qu" name= "zipcode=" 246000/> <district "Name=" Zipcode= "246000"/> <district name= "Yuexi County" zipcode= "246000"/> <district name= "Other" zipcode= "246000"/&gt 
  ; </city> * @Override public void startelement (string uri, String localname, String qName, Attributes attributes) throws Saxexception {//When the start tag is encountered, call this method if (Qname.equals ("province")) {Provincemodel = NE 
      W 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 { 
    When an end tag is encountered, this method is called 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 {}}

Next look at the base class 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 {/** * all provinces * * protected string[] Mprovincedatas; /** * Key-province Value-City * * protected map<string, string[]> mcitisdatasmap = new hashmap<string, String 
  []> (); /** * Key-City Values-District * * Protected map<string, string[]> mdistrictdatasmap = new hashmap<string, St 
 
  Ring[]> (); /** * Key-zone values-zip/protected map<string, string> mzipcodedatasmap = new Hashmap<strING, string> (); 
  /** * Current Province name */protected String mcurrentprovicename; 
  /** * The name of the current city/protected String mcurrentcityname; 
 
  /** * The name of the current zone */protected String mcurrentdistrictname = ""; 
 
  /** * Current Area ZIP/protected String mcurrentzipcode = ""; /** * Analysis of the provincial urban XML data */protected void Initprovincedatas () {//Province collection list list<provincemodel> Provin 
    Celist = null; 
    Get resources Assetmanager asset = Getassets (); 
      try {//Get input stream InputStream input = Asset.open ("Province_data.xml"); 
      Create a factory object that parses xml saxparserfactory SPF = saxparserfactory.newinstance (); 
      Parse XML saxparser parser = Spf.newsaxparser (); 
      Parsing tool Xmlparserhandler handler = new Xmlparserhandler (); 
      Parsing parser.parse (input, handler); 
      Input.close (); 
      Gets the parsed data Provincelist = Handler.getdatalist (); * * Initialize the default selected province, city, or district if (provincelist!= null &Amp;&!provincelist.isempty ()) {//get first province mcurrentprovicename = Provincelist.get (0). GetName (); 
        List<citymodel> citylist = provincelist.get (0). Getcitylist (); if (citylist!= null &&!citylist.isempty ()) {//Get first city name of First province mcurrentcityname = CityList. 
          Get (0). GetName (); 
          list<districtmodel> districtlist = citylist.get (0). Getdistrictlist (); 
          Get first county of first city name mcurrentdistrictname = Districtlist.get (0). GetName (); 
        Mcurrentzipcode = Districtlist.get (0). Getzipcode (); 
      }///* Mprovincedatas = new string[provincelist.size ()]; for (int i = 0; i < provincelist.size (); i++) {//Traverse all provincial data mprovincedatas[i] = Provincelist.get (i). g 
         
        Etname (); 
        List<citymodel> citylist = Provincelist.get (i). Getcitylist (); 
        string[] Citynames = new string[citylist.size ()]; for (int j = 0; J < Citylist.size (); 
          J + +) {//Traverse data citynames[j of all cities below province] = 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++) {//Traverse all districts/counties below the city Districtmodel Districtmodel = New Districtmodel (Districtlist.get (k). GetName (), districtlist. Get (k). Getzipcode ( 
            )); District/County for the ZIP code, save to Mzipcodedatasmap Mzipcodedatasmap.put (Districtlist.get (k). GetName (), District 
            List.get (k). Getzipcode ()); 
            Distrinctarray[k] = Districtmodel; 
          Distrinctnamearray[k] = Districtmodel.getname (); }//city-district/County data, save to Mdistrictdatasmap
          Mdistrictdatasmap.put (Citynames[j], distrinctnamearray); 
      }//province-city data, saved to Mcitisdatasmap Mcitisdatasmap.put (Provincelist.get (i). GetName (), citynames); 
    } catch (Throwable e) {e.printstacktrace (); 
 } finally {}}}

Main interface 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 M 
  Viewprovince; 
  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 () {//Add Change Event Mviewprovince.addchanginglistener (this); 
    Add Change Event Mviewcity.addchanginglistener (this); 
    Add Change Event Mviewdistrict.addchanginglistener (this); 
  Add onclick event Mbtnconfirm.setonclicklistener (this); 
    private void SetupData () {Initprovincedatas (); 
    Mviewprovince.setviewadapter (New arraywheeladapter<string> (Mainactivity.this, MProvinceDatas)); 
    Set the number of visible entries Mviewprovince.setvisibleitems (7); 
    Mviewcity.setvisibleitems (7); 
    Mviewdistrict.setvisibleitems (7); 
    Updatecities (); 
  Updateareas (); 
    /** * According to the current province, update the information of the city Wheelview * * private void Updatecities () {//Get the current province's Itme index valueint pcurrent = Mviewprovince.getcurrentitem (); 
    Lake District Current province Name mcurrentprovicename = Mprovincedatas[pcurrent]; 
    Get the following city array set string[] cities = mcitisdatasmap.get (Mcurrentprovicename); 
    if (cities = = null) {cities = new string[] {"}; 
    } mviewcity.setviewadapter (this, cities) (new arraywheeladapter<string>); 
    Mviewcity.setcurrentitem (0); 
  Updateareas (); /** * According to the current city, the new zone wheelview information * * 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 (this, areas) (new arraywheeladapter<string>); 
  Mviewdistrict.setcurrentitem (0); /** * Callback to Implement interface method/@Override public void onchanged (Wheelview wheel, int oldValue, int newvalu 
 E) {   TODO auto-generated Method Stub if (wheel = = mviewprovince) {updatecities (); 
    else if (wheel = = mviewcity) {updateareas (); else if (wheel = = mviewdistrict) {//get county name Mcurrentdistrictname = Mdistrictdatasmap.get (mcurrentcityname) 
      [NewValue]; 
    Gets the coding of the county Mcurrentzipcode = Mzipcodedatasmap.get (mcurrentdistrictname); @Override public void OnClick (View v) {switch (V.getid ()) {case R.id.btn_confirm:sh 
      Owselectedresult (); 
    Break 
    Default:break; The private void Showselectedresult () {Toast.maketext (Mainactivity.this) is currently selected: "+mcurrentprovicename+", "+mcu 
  Rrentcityname+ "," +mcurrentdistrictname+ "," +mcurrentzipcode, Toast.length_short ". Show (); 
 } 
}

There are 2 more 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=" 
    android:centercolor= "#70222222" 
    android:endcolor= "#70EEEEEE" 
    android:startcolor= "#70222222"/> 
 
  <stroke 
    android:width= "20DP" 
    android: Color= "#FF69B4"/> 
 
</shape> 

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.