我正在尝试在应用程序中实现多个微调器,其中数据是在 Volley 调用后填充的。它应该以这样的方式工作;基于第一个微调器值 "id"
的选择,第二个微调器应该从另一个 api 调用中填充它的值,将所选的 "id"
作为参数。
我现在可以在微调器中显示 "name"
(s) 了。但不确定如何为第二次 api 调用获取所选项目的 id
。现在,当我在第一个微调器中选择任何项目时,它只返回数组中最后一个项目的 id
。
Json 数组响应:
[
{
"id":1,
"name":"Roger Federer",
"country":"Switzerland",
"city":"Basel"
},
{
"id":2,
"name":"Rafael Nadal",
"country":"Spain",
"city":"Madrid"
},
{
"id":3,
"name":"Novak Djokovic",
"country":"Serbia",
"city":"Monaco"
},
{
"id":4,
"name":"Andy Murray",
"country":"United Kingdom",
"city":"London"
},
{
"id":5,
"name":"Maria Sharapova",
"country":"Russia",
"city":"Moscow"
},
{
"id":8,
"name":"Ana Ivanovic",
"country":"Serbia",
"city":"Belgrade"
}
]
一级(模型)
public class FirstLevel {
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
private String title;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
private int id;
}
Java代码
private ArrayList<String> names = new ArrayList<String>();
private ArrayList<FirstLevel> FirstLevelDataAdapterClassList;
private int selectedFirstLevel;
...
public void FIRST_LEVEL_WEB_CALL(final ViewHolder viewHolder) {
//showSimpleProgressDialog(context, "Loading...", "Fetching Json", false);
JsonArrayRequest jsArrRequest = new JsonArrayRequest
(Request.Method.GET, HTTP_SERVER_URL, null, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
FIRST_PARSE_DATA_AFTER_WEBCALL(response,viewHolder);
Log.i("FL", "FL");
//removeSimpleProgressDialog();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
}
}) {
};
requestQueue2 = Volley.newRequestQueue(context);
requestQueue2.add(jsArrRequest);
}
public void FIRST_PARSE_DATA_AFTER_WEBCALL(JSONArray array, final ViewHolder viewHolder) {
FirstLevelDataAdapterClassList = new ArrayList<>();
FirstLevel GetFirstLvDataModel = new FirstLevel();
for (int i = 0; i < array.length(); i++) {
JSONObject json = null;
try {
json = array.getJSONObject(i);
GetFirstLvDataModel.setId(json.getString("id"));
GetFirstLvDataModel.setName(json.getString("name"));
FirstLevelDataAdapterClassList.add(GetFirstLvDataModel);
names.add(FirstLevelDataAdapterClassList.get(i).getTitle().toString());
} catch (JSONException e) {
e.printStackTrace();
}
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(context, simple_spinner_item, names);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
viewHolder.spinFirst.setAdapter(spinnerArrayAdapter);
viewHolder.spinFirst.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
selectedFirstLevel=FirstLevelDataAdapterClassList.get(position).getId();
Log.i("FLFL",selectedFirstLevel);
SECOND_LEVEL_WEB_CALL(viewHolder,selectedFirstLevel);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
}
最佳答案
你的这条线
selectedFirstLevel= //How to get the 'id' of the selected item here?
会是
selectedFirstLevel = FirstLevelDataAdapterClassList.get(position).getId();
试试这个。谢谢
关于android - Spinner onItemSelected 仅返回数组的最后一项,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54743581/