（可能重复） 我知道这可能是一个重复的问题，但问题与我在这里搜索的问题有所不同。
我正在尝试动态实现Spinner但无法实现它。
问题：我能够获取存储在stateID中的stateID然后传递给方法addCites(sID)但是这里发生的事情是当我选择状态时，状态微调器变得空虚，城市在连续循环中进入城市旋转器。我是否解决了这个问题。
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
testid.setText(getID(position));
//getting stateID of selected state
String sID = testid.getText().toString();
//calling addCites Method
addCities(sID);
};
public void addCities(String sID){
final String stateID = sID;
//Creating a string request
StringRequest stringRequest = new StringRequest(Request.Method.POST, Config.CITIES_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
JSONObject j = null;
try {
//Parsing the fetched Json String to JSON Object
j = new JSONObject(response);
//Storing the Array of JSON String to our JSON Array
cities = j.getJSONArray(Config.JSON_ARRAY_CITIES);
//Calling method getCities to get the students from the JSON Array
getCities(cities);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//handle error here
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
//Adding parameters to request
params.put(Config.KEY_STATE_ID, stateID);
//returning parameter
return params;
}
};
//Adding the string request to the queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
private void getCities(JSONArray k){
//Traversing through all the items in the json array
for(int i=0;i<k.length();i++){
try {
//Getting json object
JSONObject json = k.getJSONObject(i);
//Adding the name of the student to array list
cityList.add(json.getString(Config.TAG_CITY_NAME));
} catch (JSONException e) {
e.printStackTrace();
}
}
//Setting adapter to show the items in the spinner
spinner_city.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, cityList));
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// error msg
}