Android 如何在微调器中设置初始文本，而不是json响应的第一项

我在我的应用程序中使用json解析，我从json中获取国家名称，问题在于我的json响应中第一个国家是“安道尔”，但默认情况下我想显示“选择国家”，下面是我的json响应和代码，有人能帮我吗

[{"user_status":"1","country_id":"1","country":"Andorra"},{"user_status":"1","country_id":"2","country":"United Arab Emirates"},{"user_status":"1","country_id":"3","country":"Afghanistan"},{"user_status":"1","country_id":"4","country":"Antigua and Barbuda"},{"user_status":"1","country_id":"5","country":"Anguilla"},{"user_status":"1","country_id":"6","country":"Albania"},{"user_status":"1","country_id":"7","country":"Armenia"},{"user_status":"1","country_id":"8","country":"Angola"},]

我的代码

class Logincity extends
            AsyncTask<String, String, ArrayList<HashMap<String, String>>> {
        private ProgressDialog pDialog;
        private String test;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(Registration.this);
            pDialog.setMessage("Please wait..");
            pDialog.setIndeterminate(true);
            pDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.custom_progress));
            pDialog.setCancelable(true);
            pDialog.show();
        }
        protected ArrayList<HashMap<String, String>> doInBackground(
                String... args) {
            ServiceHandler sh = new ServiceHandler();
            // Making a request to url and getting response
            citydata = new ArrayList<HashMap<String, String>>();
            String jsonStr = sh.makeServiceCall(CITY_URL, ServiceHandler.GET);
            Log.d("Response: ", "> " + jsonStr);
            if (jsonStr != null) {
                try {
                    jsonObjcitys = new JSONArray(jsonStr);
                    // state_list = jsonObj.getJSONArray(COUNTRY_LIST);
                    // looping through All Contacts
                    for (int i = 0; i < jsonObjcitys.length(); i++) {
                        JSONObject c = jsonObjcitys.getJSONObject(i);
                        // creating new HashMap
                        HashMap<String, String> map = new HashMap<String, String>();
                        // adding each child node to HashMap key => value
                        //map.put(CITY_NAME, c.getString(CITY_NAME));

                        map.put(CITY_NAME, c.getString(CITY_NAME));
                        //  map.put(PRESET_TITLES, c.getString(PRESET_TITLES));
                        citydata.add(map);

                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            } else {
                Log.e("ServiceHandler", "Couldn't get any data from the url");
            }
            return citydata;
        }
        protected void onPostExecute(ArrayList<HashMap<String, String>> result) {
            super.onPostExecute(result);
            pDialog.dismiss();
            arrallcitiies = new String[citydata.size()];
            for (int index = 0; index < citydata.size(); index++) {
                HashMap<String, String> map = citydata.get(index);
                arrallcitiies[index] = map.get(CITY_NAME);
            }
            // pass arrConuntry array to ArrayAdapter<String> constroctor :
            adapterallcities = new ArrayAdapter<String>(
                    Registration.this,
                    android.R.layout.simple_spinner_dropdown_item, arrallcitiies);
            spinrcountry.setAdapter(adapterallcities);

            spinrcountry.setPrompt("Select City");
            spinrcountry.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                @Override
                public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                    cityspitems = spinrcountry.getSelectedItem().toString();
                    System.out.println("PresetEVent selected" + cityspitems);
                }

                @Override
                public void onNothingSelected(AdapterView<?> adapterView) {
                }
            });




        }
    }

类登录扩展
异步任务{
私人对话；
私有字符串测试；
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
pDialog=newprogressdialog（Registration.this）；
pDialog.setMessage（“请稍候…”）；
pDialog.setUndeterminate（真）；
pDialog.setIndenderedRavable（getResources（）.getDrawable（R.drawable.custom_progress））；
pDialog.setCancelable（真）；
pDialog.show（）；
}
受保护的ArrayList doInBackground(
字符串…args）{
ServiceHandler sh=新的ServiceHandler（）；
//向url发出请求并获得响应
citydata=newarraylist（）；
字符串jsonStr=sh.makeServiceCall（CITY\uURL，ServiceHandler.GET）；
Log.d（“响应：”、“>”+jsonStr）；
if（jsonStr！=null）{
试一试{
jsonObjcitys=新的JSONArray（jsonStr）；
//state_list=jsonObj.getJSONArray（COUNTRY_list）；
//通过所有触点循环
对于（int i=0；ivalue
//map.put（城市名称，c.getString（城市名称））；
map.put（城市名称，c.getString（城市名称））；
//map.put（预设标题，c.getString（预设标题））；
城市数据。添加（地图）；
}
}捕获（JSONException e）{
e、 printStackTrace（）；
}
}否则{
Log.e（“ServiceHandler”，“无法从url获取任何数据”）；
}
返回城市数据；
}
受保护的void onPostExecute（ArrayList结果）{
super.onPostExecute（结果）；
pDialog.disclose（）；
ArrallCities=新字符串[citydata.size（）]；
对于（int index=0；index

只需在该数组的第一个位置添加“选择国家”，然后

长度=响应项+1

    arrallcitiies = new String[citydata.size()+1];
    arrallcitiies[0]="Select Country"; //item at pos 0
    int j=1;
    for (int index = 0; index < citydata.size(); index++) {
    HashMap<String, String> map = citydata.get(index);
    arrallcitiies[j++] = map.get(CITY_NAME);
    }

    adapterallcities = new ArrayAdapter<String>(Registration.this,
                        android.R.layout.simple_spinner_dropdown_item, arrallcitiies);
    spinrcountry.setAdapter(adapterallcities);

arallcities=新字符串[citydata.size（）+1]；
阵列城市[0]=“选择国家”//位置0处的项目
int j=1；
对于（int index=0；index

您可以编辑

   // Making a request to url and getting response
            citydata = new ArrayList<HashMap<String, String>>();
            String jsonStr = sh.makeServiceCall(CITY_URL, ServiceHandler.GET);

//向url发出请求并获得响应
citydata=newarraylist（）；
字符串jsonStr=sh.makeServiceCall（CITY\uURL，ServiceHandler.GET）；

吼叫：

// Making a request to url and getting response
            citydata = new ArrayList<HashMap<String, String>>();
            HashMap<String, String> map_select_country = new HashMap<String, String>();
            map_select_country.put("0","Select country");
            citydata.add(map_select_country); //add new this
            String jsonStr = sh.makeServiceCall(CITY_URL, ServiceHandler.GET);

//向url发出请求并获得响应
citydata=newarraylist（）；
HashMap_选择_国家=新建HashMap（）；
地图选择国家。放置（“0”，“选择国家”）；
城市数据。添加（地图选择国家）//在此添加新的
字符串jsonStr=sh.makeServiceCall（CITY\uURL，ServiceHandler.GET）；

尝试使用此代码

ArrayList<String> listcountry_id,listcountry;

listcountry_id=new ArrayList<String>();
listcountry=new ArrayList<String>();

 try {  
        JSONArray jarr=new JSONArray("your responce data here");

        for(int i=0;i<jarr.length();i++){

            JSONObject jobj=jarr.getJSONObject(i);
            listcountry_id.add(jobj.getString("country_id"));
            listcountry.add(jobj.getString("country"));              
        }       
    BindSpinnerData();      
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }       
}

 spnData.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> parent, View view,
                int position, long id) {
            // TODO Auto-generated method stub
            String ids = String.valueOf(position);
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });

private void BindSpinnerData() {
    // TODO Auto-generated method stub
    ArrayAdapter<String> spinnerLocation = new ArrayAdapter<String>(
            getApplicationContext(), R.layout.spinneritem, listcountry);
    spinnerLocation.setDropDownViewResource(R.layout.spinnerpopup);
    spnData.setAdapter(spinnerLocation); 
} 

ArrayList listcountry\u id，listcountry；
listcountry_id=新的ArrayList（）；
listcountry=新的ArrayList（）；
试试{
JSONArray jarr=新的JSONArray（“此处为您的响应数据”）；
for（int i=0；i arg0）{
//TODO自动生成的方法存根
}
});
私有void bindnerdata（）{
//TODO自动生成的方法存根
ArrayAdapter喷丝头位置=新ArrayAdapter(
getApplicationContext（），R.layout.spinneritem，listcountry）；
喷丝头位置.setDropDownViewResource（R.layout.spinnerpopup）；
数据设置适配器（喷丝头位置）；
} 

//spinneritem、spinnerpopup是文本视图布局，您可以在其中设置文本颜色和颜色背景

更改下面的内部doInBackground（）

您必须创建一个自定义适配器

public class HintAdapter extends ArrayAdapter < Objects > {


public HintAdapter(Context theContext, int theLayoutResId, String[] objects) {
    super(theContext, theLayoutResId, R.id.text1, objects);
}

@Override
public int getCount() {
    // don't display last item. It is used as hint.
    int count = super.getCount();
    return count > 0 ? count - 1 : count;
}
}

---

上述解决方案将显示默认的“选择城市”值，选择微调器后，它将只显示城市名称列表，而不显示默认值。

在向列表添加json响应之前，请尝试这样做，HashMap defaultmap=new HashMap（）；defaultmap.put（“选择国家”、“选择国家”）；citydata.add（defaultmap）@ajantha我可以在哪里添加

spinrcountry.setSelection(adapter.getCount());

public class HintAdapter extends ArrayAdapter < Objects > {


public HintAdapter(Context theContext, int theLayoutResId, String[] objects) {
    super(theContext, theLayoutResId, R.id.text1, objects);
}

@Override
public int getCount() {
    // don't display last item. It is used as hint.
    int count = super.getCount();
    return count > 0 ? count - 1 : count;
}
}

adapterallcities = new HintAdapter(
            Registration.this,
            android.R.layout.simple_spinner_dropdown_item, arrallcitiies);