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如何在Android中使用WheelView實(shí)現(xiàn)三級(jí)聯(lián)動(dòng)

發(fā)布時(shí)間：2020-11-24 16:36:42 來源：億速云 閱讀：372 作者：Leah 欄目：移動(dòng)開發(fā)

這篇文章將為大家詳細(xì)講解有關(guān)如何在Android中使用WheelView實(shí)現(xiàn)三級(jí)聯(lián)動(dòng)，文章內(nèi)容質(zhì)量較高，因此小編分享給大家做個(gè)參考，希望大家閱讀完這篇文章后對(duì)相關(guān)知識(shí)有一定的了解。

popupwindow中是三個(gè)wheelview，

<&#63;xml version="1.0" encoding="utf-8"&#63;>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:background="#00000000"
 android:gravity="bottom"
 android:layout_width="match_parent"
 android:layout_height="match_parent">

 <LinearLayout
 android:id="@+id/ly_myinfo_changeaddress_child"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_alignParentBottom="true"
 android:background="#ffffff"
 android:orientation="vertical" >


 <RelativeLayout
 android:layout_width="match_parent"
 android:layout_height="44dp"
 >

 <View
 android:background="@color/silver"
 android:layout_width="match_parent"
 android:layout_height="0.5dp" />

 <TextView
 android:id="@+id/btn_myinfo_cancel"
 android:layout_width="wrap_content"
 android:layout_height="match_parent"
 android:paddingLeft="18dp"
 android:text="取消"
 android:gravity="center"
 android:layout_alignParentLeft="true"
 android:layout_marginRight="15dip"
 android:textColor="#e84515"
 android:textSize="14sp" />


 <TextView
 android:id="@+id/btn_myinfo_sure"
 android:layout_width="wrap_content"
 android:layout_height="match_parent"
 android:layout_alignParentRight="true"
 android:gravity="center"
 android:text="完成"
 android:textColor="#e84515"
 android:paddingRight="18dp"
 android:textSize="14sp" />

 </RelativeLayout>

 <View android:layout_width="match_parent"
 android:layout_height="1dp"
 android:background="#d8d8d8"/>

 <LinearLayout
 android:layout_width="match_parent"
 android:layout_height="190dip"
 android:orientation="horizontal"
 android:gravity="center_vertical">

 <guozhaohui.com.wlylocationchoose.locationchoose.WheelView
 android:id="@+id/provinceView"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_weight="1"/>


 <guozhaohui.com.wlylocationchoose.locationchoose.WheelView
 android:id="@+id/cityView"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_weight="1"/>
 <guozhaohui.com.wlylocationchoose.locationchoose.WheelView
 android:id="@+id/districtView"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_weight="1"/>
 </LinearLayout>

 </LinearLayout>

</LinearLayout>

b. 因?yàn)樯厦嬲f了，需要將文件copy到app目錄下，所以直接最好這代碼在application中寫，

package guozhaohui.com.wlylocationchoose;

import android.app.Application;

import java.io.InputStream;

import guozhaohui.com.wlylocationchoose.locationchoose.CityDataHelper;

/**
 * Created by ${GuoZhaoHui} on 2017/2/13.
 * Abstract:
 */

public class MyApplication extends Application {

 private CityDataHelper dataHelper;

 @Override
 public void onCreate() {
 super.onCreate();

 /**
 * 放在application中，讓app一啟動(dòng)就把raw中文件copy到 "/data/data/"+context.getPackageName()+"/databases/"
 * 這是app讀取數(shù)據(jù)的方法，不管是將數(shù)據(jù)庫(kù)文件放在raw或者assets中都是一樣
 */
 dataHelper=CityDataHelper.getInstance(this);
 InputStream in = this.getResources().openRawResource(R.raw.city);
 dataHelper.copyFile(in,CityDataHelper.DATABASE_NAME,CityDataHelper.DATABASES_DIR);

 }
}

c. popupwindow不是本次的重點(diǎn)也直接貼代碼。

 View popupView = LayoutInflater.from(this).inflate(R.layout.popup_locationchoose, null);
 mPopupWindow = new PopupWindow(popupView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
 mPopupWindow.setTouchable(true);
 mPopupWindow.setFocusable(true);
 mPopupWindow.setOutsideTouchable(true);
 mPopupWindow.setAnimationStyle(R.style.popup_locationchoose_bottom);

 // pickText = (TextView)popupView.findViewById(R.id.tv_pickText);
 provinceView = (WheelView)popupView.findViewById(R.id.provinceView);
 cityView = (WheelView)popupView.findViewById(R.id.cityView);
 districtView = (WheelView)popupView.findViewById(R.id.districtView);

 //確定或者取消
 btn_myinfo_sure = (TextView)popupView.findViewById(R.id.btn_myinfo_sure);
 btn_myinfo_cancel = (TextView) popupView.findViewById(R.id.btn_myinfo_cancel);
 btn_myinfo_cancel.setOnClickListener(this);
 btn_myinfo_sure.setOnClickListener(this);

設(shè)置三個(gè)wheelview的可見條目數(shù)

provinceView.setVisibleItems(7);
cityView.setVisibleItems(7);
districtView.setVisibleItems(7);

為三個(gè) wheelview添加滑動(dòng)事件

 // 添加change事件
 provinceView.addChangingListener(this);
 // 添加change事件
 cityView.addChangingListener(this);
 // 添加change事件
 districtView.addChangingListener(this);

c. 拿到操作數(shù)據(jù)的對(duì)象SQLiteDatabase

 db = dataHelper.openDataBase();

觀察數(shù)據(jù)庫(kù)文件可知這表中是根據(jù)字段level來判斷省市區(qū)的，如圖

如何在Android中使用WheelView實(shí)現(xiàn)三級(jí)聯(lián)動(dòng)

同時(shí)我們也可知這省市區(qū)三個(gè)模型中的字段都是一樣的，都是

 private int cityID;
 private int parentId;
 private int level;
 private String name;
 private String pinyin;

不清楚的可以自己查下表，如圖，我查一個(gè)省

如何在Android中使用WheelView實(shí)現(xiàn)三級(jí)聯(lián)動(dòng)

所以我們建立一樣的模型，雖然三個(gè)字段是一樣的，建一個(gè)就可以了，但是為了標(biāo)準(zhǔn)最好還是建三個(gè)。

package guozhaohui.com.wlylocationchoose.locationchoose.model;

public class ProvinceModel {

 private int cityID;
 private int parentId;
 private int level;
 private String name;
 private String pinyin;

 public int getCityID() {
 return cityID;
 }

 public void setCityID(int cityID) {
 this.cityID = cityID;
 }

 public int getParentId() {
 return parentId;
 }

 public void setParentId(int parentId) {
 this.parentId = parentId;
 }

 public int getLevel() {
 return level;
 }

 public void setLevel(int level) {
 this.level = level;
 }

 public String getName() {
 return name;
 }

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

 public String getPinyin() {
 return pinyin;
 }

 public void setPinyin(String pinyin) {
 this.pinyin = pinyin;
 }


}

進(jìn)行sql查詢，將查詢到的結(jié)果保存在cursor中，然后進(jìn)行一行行的循環(huán)遍歷，然后將遍歷一行的對(duì)象添加到這個(gè)對(duì)象的集合中。這里得到省的集合。

 public List<ProvinceModel> getProvice(SQLiteDatabase db){
 String sql="SELECT * FROM ChooseCityModel where level = 1 ORDER BY cityID";
 Cursor cursor = db.rawQuery(sql,null);
 List<ProvinceModel> list=new ArrayList<ProvinceModel>();
 if (cursor!=null&&cursor.getCount() > 0) {
 while (cursor.moveToNext()){
 ProvinceModel provinceModel=new ProvinceModel();
 provinceModel.setCityID(cursor.getInt(cursor.getColumnIndex("cityID")));
 provinceModel.setParentId(cursor.getInt(cursor.getColumnIndex("parentId")));
 provinceModel.setLevel(cursor.getInt(cursor.getColumnIndex("level")));
 provinceModel.setName(cursor.getString(cursor.getColumnIndex("name")));
 provinceModel.setPinyin(cursor.getString(cursor.getColumnIndex("pinyin")));
 list.add(provinceModel);
 }
 }
 return list;
 }

根據(jù)表的結(jié)構(gòu)，得到相應(yīng)的sql語句，希望根據(jù)上一級(jí)省的cityId得到下面的市，其實(shí)換句話說本級(jí)市的parentId就是上一級(jí)的cityid，不清楚的可以將sql語句查一遍，驗(yàn)證下對(duì)不對(duì)，如圖

如何在Android中使用WheelView實(shí)現(xiàn)三級(jí)聯(lián)動(dòng)

得到相應(yīng)省下面市的集合

 public List<CityModel> getCityByParentId(SQLiteDatabase db, String code){
 String sql="SELECT * FROM ChooseCityModel WHERE level = 2 and parentId = &#63; ORDER BY cityID";
 Cursor cursor = db.rawQuery(sql,new String[][code]);
 List<CityModel> list=new ArrayList<CityModel>();

 if (cursor!=null&&cursor.getCount() > 0) {

 while (cursor.moveToNext()){
 CityModel cityModel=new CityModel();
 cityModel.setCityID(cursor.getInt(cursor.getColumnIndex("cityID")));
 cityModel.setParentId(cursor.getInt(cursor.getColumnIndex("parentId")));
 cityModel.setLevel(cursor.getInt(cursor.getColumnIndex("level")));
 cityModel.setName(cursor.getString(cursor.getColumnIndex("name")));
 cityModel.setPinyin(cursor.getString(cursor.getColumnIndex("pinyin")));
 list.add(cityModel);
 }
 }
 return list;
 }

區(qū)也是一樣的，直接貼代碼了

 public List<DistrictModel> getDistrictById(SQLiteDatabase db, String code){
 //注意這里的parentId其實(shí)就是上一級(jí)的cityID
 String sql="SELECT * FROM ChooseCityModel WHERE level = 3 and parentId = &#63; ORDER BY cityID";
 Cursor cursor = db.rawQuery(sql,new String[][code]);
 List<DistrictModel> list=new ArrayList<DistrictModel>();
 if (cursor!=null&&cursor.getCount() > 0) {
 while (cursor.moveToNext()){
 DistrictModel districtModel=new DistrictModel();
 districtModel.setCityID(cursor.getInt(cursor.getColumnIndex("cityID")));
 districtModel.setParentId(cursor.getInt(cursor.getColumnIndex("parentId")));
 districtModel.setLevel(cursor.getInt(cursor.getColumnIndex("level")));
 districtModel.setName(cursor.getString(cursor.getColumnIndex("name")));
 districtModel.setPinyin(cursor.getString(cursor.getColumnIndex("pinyin")));
 list.add(districtModel);
 }
 }
 return list;
 }

d. 對(duì)彈出popuwindow顯示的wheelview進(jìn)行初始化，注釋都寫在代碼里，

 private void initpopData() {
 //初始化數(shù)據(jù)
 dataHelper = CityDataHelper.getInstance(this);
 db = dataHelper.openDataBase();
 provinceDatas = dataHelper.getProvice(db);
 if (provinceDatas.size() > 0) {

 //彈出popup時(shí)，省wheelview中當(dāng)前的省其實(shí)就是省集合的第一個(gè)
 mCurrentProvince = provinceDatas.get(0).getName();

 //根據(jù)省cityid查詢到第一個(gè)省下面市的集合
 cityDatas = dataHelper.getCityByParentId(db, provinceDatas.get(0).getCityID()+"");
 }
 if (cityDatas.size() > 0) {
 //根據(jù)市cityid查詢到第一個(gè)市集合下面區(qū)的集合
 districtDatas = dataHelper.getDistrictById(db, cityDatas.get(0).getCityID()+"");

 }
 //wheelview的適配器代碼
 provinceAdapter = new ProvinceAdapter(this, provinceDatas);
 provinceAdapter.setTextSize(TEXTSIZE);//設(shè)置字體大小
 provinceView.setViewAdapter(provinceAdapter);

 updateCitys();
 updateAreas();
 }

更新省下面市的wheelview內(nèi)容，注釋很清楚，直接上代碼

 private void updateCitys() {
 int pCurrent = provinceView.getCurrentItem();
 if (provinceDatas.size() > 0) {
 //這里是必須的的，上面得到的集合只是第一個(gè)省下面所有市的集合及第一個(gè)市下面所有區(qū)的集合
 //這里得到的是相應(yīng)省下面對(duì)應(yīng)市的集合
 cityDatas = dataHelper.getCityByParentId(db, provinceDatas.get(pCurrent).getCityID()+"");
 } else {
 cityDatas.clear();
 }
 citysAdapter = new CitysAdapter(this, cityDatas);
 citysAdapter.setTextSize(TEXTSIZE);
 cityView.setViewAdapter(citysAdapter);
 if (cityDatas.size() > 0) {
 //默認(rèn)省下面 市wheelview滑動(dòng)第一個(gè)，顯示第一個(gè)市
 cityView.setCurrentItem(0);
 mCurrentCity = cityDatas.get(0).getName();
 } else {
 mCurrentCity = "";
 }
 updateAreas();
 }

第三個(gè)wheelview和第二個(gè)一樣的，代碼直接上

 private void updateAreas() {
 int cCurrent = cityView.getCurrentItem();
 if (cityDatas.size() > 0) {
 districtDatas = dataHelper.getDistrictById(db, cityDatas.get(cCurrent).getCityID()+"");
 } else {
 districtDatas.clear();
 }
 areaAdapter = new AreaAdapter(this, districtDatas);
 areaAdapter.setTextSize(TEXTSIZE);
 districtView.setViewAdapter(areaAdapter);
 if (districtDatas.size() > 0) {
 mCurrentDistrict = districtDatas.get(0).getName();
 districtView.setCurrentItem(0);
 } else {
 mCurrentDistrict = "";
 }
 }

關(guān)于如何在Android中使用WheelView實(shí)現(xiàn)三級(jí)聯(lián)動(dòng)就分享到這里了，希望以上內(nèi)容可以對(duì)大家有一定的幫助，可以學(xué)到更多知識(shí)。如果覺得文章不錯(cuò)，可以把它分享出去讓更多的人看到。

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