Spinner 实现key value 效果

刺骨的言语ヽ痛彻心扉 2022-03-31 03:28 114阅读 0赞

在使用Spinner进行下拉列表时，我们一般都会使用字符串数组的方式加ArrayAdapter，取到的列表值就是我们所看到的Text。如果我们想实现网页中select <option value=""></option>这种效果，看到的和取到的值是不一样的怎么办？

方法有好几种，以下是最简单的方法：

1：首先定义一个类：ZxType.java

public class ZxType {
        public String key;    //用于显示
        public String value;//用于数据操作
        
        public ZxType(String key,String value){
            this.key = key;
            this.value = value;
        }
        
        public String toString(){
            return key;
        }
    }

2：ZxzxActivity.java

public class ZxzxActivity extends Activity {
        private Spinner spZxzxType = null;
        private ArrayAdapter<ZxType> adapter = null;
        private ZxType zxTypeArr[] = null;
        
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_zxzx);
            
            spZxzxType = (Spinner)findViewById(R.id.spZxzxType);
            
            getZxTypeArr();
            
            adapter = new ArrayAdapter<ZxType>(
                    this,
                    android.R.layout.simple_spinner_item,
                    zxTypeArr
                );
            
            spZxzxType.setAdapter(adapter);
            
            spZxzxType.setOnItemSelectedListener(listener);
        }
        private OnItemSelectedListener listener = new OnItemSelectedListener(){
            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
                    long arg3) {
                ZxType zxtype = (ZxType)spZxzxType.getSelectedItem();
                String value = zxtype.value;
                Toast.makeText(ZxzxActivity.this, value, Toast.LENGTH_SHORT).show();
            }
            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
                
            }
        };
        
        
        private void getZxTypeArr(){
            zxTypeArr = new ZxType[]{
                    new ZxType("咨询类别",""),
                    new ZxType("重点税源模块","cc9890ee22ceff760122df0473210110"),
                    new ZxType("普通发票类","4028801b1c0bfe55011c0bfe89300002"),
                    new ZxType("专用发票类","4028801b1c0bfe55011c0bfea3310003"),
                    new ZxType("个体税收类","4028801b1c0bfe55011c0bfecc940004"),
                    new ZxType("税务登记类","4028801b1c0bfe55011c0bfeea2f0005"),
                    new ZxType("涉税资料填写类","4028801b1c0bfe55011c0bfeea2f0006"),
                    new ZxType("增值税类","4028801b1c0bfe55011c0bfeea2f0007"),
                    new ZxType("消费税类","4028801b1c0bfe55011c0bfeea2f0008"),
                    new ZxType("所得税类","4028801b1c0bfe55011c0bfeea2f0009"),
                    new ZxType("外商投资企业所得税类","4028801b1c0bfe55011c0bfeea2f0010"),
                    new ZxType("进出口税收类","4028801b1c0bfe55011c0bfeea2f0011"),
                    new ZxType("减免税类","4028801b1c0bfe55011c0bfeea2f0012"),
                    new ZxType("税收法规类","4028801b1c0bfe55011c0bfeea2f0013"),
                    new ZxType("其他类","4028801b1c0bfe55011c0bfeea2f0014"),
                    new ZxType("纳税申报类","4028801b1c0bfe55011c0bfeea2f0015"),
                    new ZxType("车辆购置税","4028801b1c0bfe55011c0bfeea2f0016"),
                    new ZxType("利息税","4028801b1c0bfe55011c0bfeea2f0017")
            };
        }}

3:activity\_zxzx.xml