Android Spinner的键值对用法

1.写对象，存数据

package com.business.model;

import java.io.Serializable;

public class SpinnerData implements Serializable {
    
    
    private int id;
    private String Value;

    public SpinnerData() {
    
    
    }

    public SpinnerData(int id, String value) {
    
    
        this.id = id;
        Value = value;
    }

    public int getId() {
    
    
        return id;
    }

    public void setId(int id) {
    
    
        this.id = id;
    }

    public String getValue() {
    
    
        return Value;
    }

    public void setValue(String value) {
    
    
        Value = value;
    }
	/*适配器在显示数据的时候，如果传入适配器的对象不是字符串的情况下，直接就使用对象.toString()*/
    @Override
    public String toString() {
    
    
        return Value;
    }
}

2.Java代码：

package com.business.activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import com.business.model.SpinnerData;
import com.chinesewms.handdevice.R;
import com.sj.running.RunTimeData;
import com.sj.setting.PathConfig;
import com.sj.util.HttpUtil;
import org.json.JSONArray;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class AddinputGoodsDetailActivity extends AppCompatActivity {
    
    
    Spinner spinnerxiaolei = null;
    List<SpinnerData> spinnerDataList = new ArrayList<>();
    ArrayAdapter<SpinnerData> arrayAdapter;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_addinput_goods_detail);

        spinnerxiaolei = findViewById(R.id.spinnerxiaolei);
		//监听点击事件
        spinnerxiaolei.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    
    
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    
    
                //获取键
                ((SpinnerData)spinnerxiaolei.getSelectedItem()).getId();
                //获取值
                ((SpinnerData)spinnerxiaolei.getSelectedItem()).getValue();
            }
        });
    }

    @Override
    protected void onResume() {
    
    
        new Thread(new Runnable() {
    
    
            @Override
            public void run() {
    
    
                SetValue();
            }
        }).start();
    }

    private void SetValue() {
    
    
        try {
    
    
            String result = null;//服务器返回的字符串
            JSONObject jsonObject = new JSONObject(result);
            JSONArray ja = new JSONArray(jsonObject.getString("data"));
            for (int i = 0; i < ja.length(); i++) {
    
    
                JSONObject jo = ja.getJSONObject(i);
                spinnerDataList.add(new SpinnerData(jo.getInt("goods_id"),jo.getString("goods_name")));
            }
            arrayAdapter = new ArrayAdapter<SpinnerData>(this, android.R.layout.simple_spinner_item, spinnerDataList);
            arrayAdapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);
            runOnUiThread(new Runnable() {
    
    
                @Override
                public void run() {
    
    
                    spinnerxiaolei.setAdapter(arrayAdapter);
                }
            });
        } catch (Exception e) {
    
    
            e.printStackTrace();
            e.getMessage();
        }
    }
}

3.Xml代码：

<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
        tools:context="com.business.activity.AddinputGoodsDetailActivity">
    <LinearLayout android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:layout_marginTop="10dp"
                  android:orientation="horizontal">

        <TextView android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_marginLeft="15dp"
                  android:textSize="18sp"
                  android:text="货品小类："/>
        <Spinner android:layout_width="200dp"
                 android:layout_height="wrap_content"
                 android:id="@+id/spinnerxiaolei"
                 android:textAlignment="center"
        />
    </LinearLayout>
</LinearLayout>

效果：