Androidは多機能アドレスセレクタを実現します。

本論文の例では、Androidが多機能アドレスセレクタを実現するための具体的なコードを共有しています。参考にしてください。具体的な内容は以下の通りです。
突然地区のセレクタを作りたいです。そして、私のボックス用の第三者のデータは地元のjsonファイルを使って、jsonファイルを解析して、リストのセットにデータを入れて、ボックスにセットします。問題は解決します。
ソースダウンロード
1.効果図

2.builderを引用する

implementation 'com.google.code.gson:gson:2.8.0'
implementation 'com.contrarywind:Android-PickerView:4.1.9'

3.jsonファイルの保管住所：
E:\workspace\android\MyApplication 25\ap\src\mail\asets\citydata.json
4.解析類bean

package com.example.myapplication25;
 
 
import java.io.Serializable;
import java.util.List;
 
public class CityBean {
    /**
     * code : 200
     * message :     
     * datas : {"list":[{"area_id":"1","area_name":"  ","citylist":[{"area_id":"36","area_name":"   ","arealist":[{"area_id":"37","area_name":"   "},{"area_id":"38","area_name":"   "},{"area_id":"41","area_name":"   "},{"area_id":"42","area_name":"   "},{"area_id":"43","area_name":"    "},{"area_id":"44","area_name":"   "},{"area_id":"45","area_name":"    "},{"area_id":"46","area_name":"   "},{"area_id":"47","area_name":"   "},{"area_id":"48","area_name":"   "},{"area_id":"49","area_name":"   "},{"area_id":"50","area_name":"   "},{"area_id":"51","area_name":"   "},{"area_id":"52","area_name":"   "},{"area_id":"53","area_name":"   "},{"area_id":"54","area_name":"   "},{"area_id":"566","area_name":"  "}]}]}]}
     */
 
    private int code;
    private String message;
    private DatasBean datas;
 
    public int getCode() {
        return code;
    }
 
    public void setCode(int code) {
        this.code = code;
    }
 
    public String getMessage() {
        return message;
    }
 
    public void setMessage(String message) {
        this.message = message;
    }
 
    public DatasBean getDatas() {
        return datas;
    }
 
    public void setDatas(DatasBean datas) {
        this.datas = datas;
    }
 
    public static class DatasBean implements Serializable {
        private List<ListBean> list;
 
        public List<ListBean> getList() {
            return list;
        }
 
        public void setList(List<ListBean> list) {
            this.list = list;
        }
 
        public static class ListBean implements Serializable {
            /**
             * area_id : 1
             * area_name :   
             * citylist : [{"area_id":"36","area_name":"   ","arealist":[{"area_id":"37","area_name":"   "},{"area_id":"38","area_name":"   "},{"area_id":"41","area_name":"   "},{"area_id":"42","area_name":"   "},{"area_id":"43","area_name":"    "},{"area_id":"44","area_name":"   "},{"area_id":"45","area_name":"    "},{"area_id":"46","area_name":"   "},{"area_id":"47","area_name":"   "},{"area_id":"48","area_name":"   "},{"area_id":"49","area_name":"   "},{"area_id":"50","area_name":"   "},{"area_id":"51","area_name":"   "},{"area_id":"52","area_name":"   "},{"area_id":"53","area_name":"   "},{"area_id":"54","area_name":"   "},{"area_id":"566","area_name":"  "}]}]
             */
 
            private String area_id;
            private String area_name;
            private List<CitylistBean> citylist;
 
            public String getArea_id() {
                return area_id;
            }
 
            public void setArea_id(String area_id) {
                this.area_id = area_id;
            }
 
            public String getArea_name() {
                return area_name;
            }
 
            public void setArea_name(String area_name) {
                this.area_name = area_name;
            }
 
            public List<CitylistBean> getCitylist() {
                return citylist;
            }
 
            public void setCitylist(List<CitylistBean> citylist) {
                this.citylist = citylist;
            }
 
            public static class CitylistBean implements Serializable {
                /**
                 * area_id : 36
                 * area_name :    
                 * arealist : [{"area_id":"37","area_name":"   "},{"area_id":"38","area_name":"   "},{"area_id":"41","area_name":"   "},{"area_id":"42","area_name":"   "},{"area_id":"43","area_name":"    "},{"area_id":"44","area_name":"   "},{"area_id":"45","area_name":"    "},{"area_id":"46","area_name":"   "},{"area_id":"47","area_name":"   "},{"area_id":"48","area_name":"   "},{"area_id":"49","area_name":"   "},{"area_id":"50","area_name":"   "},{"area_id":"51","area_name":"   "},{"area_id":"52","area_name":"   "},{"area_id":"53","area_name":"   "},{"area_id":"54","area_name":"   "},{"area_id":"566","area_name":"  "}]
                 */
 
                private String area_id;
                private String area_name;
                private List<ArealistBean> arealist;
 
                public String getArea_id() {
                    return area_id;
                }
 
                public void setArea_id(String area_id) {
                    this.area_id = area_id;
                }
 
                public String getArea_name() {
                    return area_name;
                }
 
                public void setArea_name(String area_name) {
                    this.area_name = area_name;
                }
 
                public List<ArealistBean> getArealist() {
                    return arealist;
                }
 
                public void setArealist(List<ArealistBean> arealist) {
                    this.arealist = arealist;
                }
 
                public static class ArealistBean implements Serializable {
                    /**
                     * area_id : 37
                     * area_name :    
                     */
 
                    private String area_id;
                    private String area_name;
 
                    public String getArea_id() {
                        return area_id;
                    }
 
                    public void setArea_id(String area_id) {
                        this.area_id = area_id;
                    }
 
                    public String getArea_name() {
                        return area_name;
                    }
 
                    public void setArea_name(String area_name) {
                        this.area_name = area_name;
                    }
                }
            }
        }
    }
}

5.額縁類

package com.example.myapplication25;
 
 
import android.app.Activity;
import android.graphics.Color;
 
import com.bigkoo.pickerview.builder.OptionsPickerBuilder;
import com.bigkoo.pickerview.listener.OnOptionsSelectChangeListener;
import com.bigkoo.pickerview.listener.OnOptionsSelectListener;
import com.bigkoo.pickerview.view.OptionsPickerView;
 
public class SelectPickerUtil {
    protected static OptionsPickerView pvOptions;
 
 
    public static OptionsPickerBuilder getSelectPickerBuilder2(OptionsPickerBuilder optionsPickerBuilder) {
        optionsPickerBuilder
                .setTitleText("title")
                .setSubmitColor(Color.parseColor("#11DBFF"))
                .setCancelColor(Color.parseColor("#999999"))
                .setDividerColor(Color.GRAY)
                .setLineSpacingMultiplier(2.2f)
                .setTextColorCenter(Color.parseColor("#11DBFF")) //         
                .setContentTextSize(16);
        return optionsPickerBuilder;
    }
 
    public static OptionsPickerBuilder getSelectPickerBuilder3(OptionsPickerBuilder optionsPickerBuilder) {
        optionsPickerBuilder
                .setDividerColor(Color.DKGRAY)
                .setContentTextSize(20)
                .setSubmitColor(Color.parseColor("#11DBFF"))
                .setCancelColor(Color.parseColor("#999999"))
                //                .setDecorView(mFrameLayout)// dialog   ,  ViewGroup, pickerView       ViewGroup 
                .setOutSideColor(0x00000000)
                .setLineSpacingMultiplier(2.2f)
                .setOutSideCancelable(true);
        return optionsPickerBuilder;
    }
 
    public static OptionsPickerView initChoiceArea(Activity activity, OnOptionsSelectListener onOptionsSelectListener, OnOptionsSelectChangeListener onOptionsSelectChangeListener) {
        pvOptions = new OptionsPickerBuilder(activity, onOptionsSelectListener)
                .setOptionsSelectChangeListener(onOptionsSelectChangeListener)
                .setSubmitText("  ")//      
                .setCancelText("  ")//      
                .setTitleText("    ")//  
                .setSubCalSize(18)//         
                .setTitleSize(20)//      
                .setTitleColor(0xFFF9731E)//      
                .setSubmitColor(0xFFF9731E)//        
                .setCancelColor(0xFFF9731E)//        
                .isCenterLabel(false) //           label  ，false   item     label。
                .setCyclic(false, false, false)//    
                .setSelectOptions(0, 0, 0)  //       
                .setOutSideCancelable(false)//    dismiss default true
//                .isDialog(true)//          
                .isRestoreItem(true)//       ，         。
                .build();
        return pvOptions;
    }
 
}

6.メインインターフェース

package com.example.myapplication25;
 
 
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.bigkoo.pickerview.listener.OnOptionsSelectChangeListener;
import com.bigkoo.pickerview.listener.OnOptionsSelectListener;
import com.bigkoo.pickerview.view.OptionsPickerView;
import com.google.gson.Gson;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
 
import androidx.appcompat.app.AppCompatActivity;
 
public class MainActivity extends AppCompatActivity implements OnOptionsSelectListener, OnOptionsSelectChangeListener {
    //    ：https://github.com/Bigkoo/Android-PickerView
    //   
    protected List<String> options1Items = new ArrayList<>();
    protected List<String> city;
    //   
    protected List<List<String>> options2Items = new ArrayList<>();
    //   
    protected List<List<List<String>>> options3Items = new ArrayList<>();
    //     
    protected List<String> options1Itemsnumber = new ArrayList<>();
    protected List<String> citynumber;
    protected List<List<String>> area;
    protected List<List<String>> areanumber;
    protected List<String> chirendenarea;
    protected List<String> chirendenareanumber;
    //     
    protected List<List<String>> options2Itemsnumber = new ArrayList<>();
    //     
    protected List<List<List<String>>> options3Itemsnumber = new ArrayList<>();
 
    private Button btn_location;
    private TextView tv_location;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        getCaseInfo2();
        btn_location = findViewById(R.id.btn_location);
        tv_location = findViewById(R.id.tv_location);
        btn_location.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                anXzXz();
            }
        });
    }
 
    public void anXzXz() {
        OptionsPickerView build = SelectPickerUtil.initChoiceArea(MainActivity.this, this, this);
        build.setPicker(options1Items, options2Items, options3Items);//     
        build.show();
    }
 
    private void getCaseInfo2() {
        String json = null;
        try {
            InputStream inputStream = getAssets().open("citydata.json");
            int size = inputStream.available();
            byte[] buffer = new byte[size];
            inputStream.read(buffer);
            inputStream.close();
            json = new String(buffer, "UTF-8");
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        //  Log.e("TAG","loadJsonFromAssests_all:"+json.toString());
        Gson gson = new Gson();
        CityBean userSimple = gson.fromJson(json, CityBean.class);
        for (int i = 0; i < userSimple.getDatas().getList().size(); i++) {
            options1Items.add(userSimple.getDatas().getList().get(i).getArea_name());
            options1Itemsnumber.add(userSimple.getDatas().getList().get(i).getArea_id());
            city = new ArrayList<>();
            citynumber = new ArrayList<>();
            area = new ArrayList<>();
            areanumber = new ArrayList<>();
            List<CityBean.DatasBean.ListBean.CitylistBean> citylist = userSimple.getDatas().getList().get(i).getCitylist();
            for (int o = 0; o < userSimple.getDatas().getList().get(i).getCitylist().size(); o++) {
                city.add(citylist.get(o).getArea_name());
                citynumber.add(citylist.get(o).getArea_id());
                chirendenarea = new ArrayList<>();
                chirendenareanumber = new ArrayList<>();
                List<CityBean.DatasBean.ListBean.CitylistBean.ArealistBean> arealist = userSimple.getDatas().getList().get(i).getCitylist().get(o).getArealist();
                for (int u = 0; u < userSimple.getDatas().getList().get(i).getCitylist().get(o).getArealist().size(); u++) {
                    chirendenarea.add(arealist.get(u).getArea_name());
                    chirendenareanumber.add(arealist.get(u).getArea_id());
                }
                area.add(chirendenarea);
                areanumber.add(chirendenareanumber);
            }
            options2Items.add(city);
            options2Itemsnumber.add(citynumber);
            options3Items.add(area);
            options3Itemsnumber.add(areanumber);
        }
    }
 
    @Override
    public void onOptionsSelectChanged(int options1, int options2, int options3) {
 
    }
 
    @Override
    public void onOptionsSelect(int options1, int options2, int options3, View view) {
        tv_location.setText(String.format("%s --%s--%s",
                options1Items.get(options1),
                options2Items.get(options1).get(options2),
                options3Items.get(options1).get(options2).get(options3)));
        Log.e("TAG", "onOptionsSelect_end:" +
                options1Itemsnumber.get(options1) + options1Items.get(options1)
                + options2Itemsnumber.get(options1).get(options2) + options2Items.get(options1).get(options2)
                + options3Itemsnumber.get(options1).get(options2).get(options3) + options3Items.get(options1).get(options2).get(options3));
    }
}

7.レイアウトページは一つのbuttonと一つのtextviewです。自分で追加してください。
以上が本文の全部です。皆さんの勉強に役に立つように、私たちを応援してください。