Question

我有一个简单的Spinner实现为：

vehicle = json.getJSONArray("vehicle");
for(int i = 0; i < vehicle.length(); i++){
    JSONObject c = vehicle.getJSONObject(i);
    //put json obkject on variable
    String id = c.getString("id");
    String name = c.getString("name");
    String capacity = c.getString("capacity");
    String cost = c.getString("cost");
    String v = name + " ("+capacity + " Liters)";
    vehicleList.add(v);
    // Set Spinner Adapter
    mySpinner.setAdapter(new ArrayAdapter<String>(OrderDetails.this,android.R.layout.simple_spinner_dropdown_item,vehicleList));
    // Spinner on item click listener
    mySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> arg0,View arg1, int position, long arg3) {  
            car = vehicleList.get(+position); 
            Toast.makeText(getApplicationContext(), car, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            car = null;
        }
    });                     
}

我想在car变量中获取“ID”的值。是否可以通过上述实施？

提前致谢。

Answer 1

尝试用这个替换你的项目点击监听器......

mySpinner.setOnItemSelectedListener(new OnItemSelectedListener() {

    public void onItemSelected(AdapterView<?> arg0, View view,
            int position, long id) {
        int spinnerItem = spinner.getSelectedItemPosition();
        car = vehicleList.get(spinnerItem);
        Toast.makeText(getApplicationContext(), selectedId, Toast.LENGTH_SHORT).show();     
    }

    public void onNothingSelected(AdapterView<?> arg0) {
        // nothing to do here :|
    }
});

<强> //修改您可以创建另一个包含ID值的列表...然后将值添加为vehicleList ...

idList.add(id);

然后在spinner中选择项目时调用

String selectedId = idList.get(spinnerItem);

Answer 2

返回所选位置。

  mySpinner.getSelectedItem()

或

mySpinner.getSelectedItemPosition()

简单的微调器获得位置特定值

2 个答案: