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大纲:
我必须从服务器获取一些运营商列表。
下面是我的 JSON 数据
{" repaidServiceList":[{"operator_id":"2","operator_name":"Reliance GSM"},{"operator_id":"9","operator_name":"TATA CDMA\/Walky"},{"operator_id":"10","operator_name":"Virgin GSM - TATA"},{"operator_id":"17","operator_name":"Docomo Mobile"},{"operator_id":"18","operator_name":"Idea Mobile"},{"operator_id":"35","operator_name":"T24 (DOCOMO)"},{"operator_id":"22","operator_name":"VodaFone Mobile"},{"operator_id":"28","operator_name":"MTS DataCard"},{"operator_id":"29","operator_name":"Reliance CDMA\/NetConnect\/Land Line"},{"operator_id":"30","operator_name":"TATA Photon"},{"operator_id":"32","operator_name":"Idea Netsetter"},{"operator_id":"33","operator_name":"MTS Prepaid"},{"operator_id":"38","operator_name":"Bsnl - Data\/Validity"},{"operator_id":"39","operator_name":"Bsnl Topup"},{"operator_id":"41","operator_name":"Bsnl Data Card"},{"operator_id":"45","operator_name":"Aircel"},{"operator_id":"46","operator_name":"Aircel Pocket Internet"},{"operator_id":"52","operator_name":"Virgin CDMA - TATA"},{"operator_id":"53","operator_name":"Docomo Special"},{"operator_id":"55","operator_name":"Videocon"},{"operator_id":"56","operator_name":"MTNL Mumbai"},{"operator_id":"57","operator_name":"MTNL Mumbai Special"},{"operator_id":"58","operator_name":"Uninor"},{"operator_id":"59","operator_name":"MTNL Delhi"},{"operator_id":"60","operator_name":"MTNL Delhi Special"},{"operator_id":"61","operator_name":"Uninor Special"},{"operator_id":"62","operator_name":"Videocon Special"},{"operator_id":"63","operator_name":"MTNL Delhi"},{"operator_id":"64","operator_name":"MTNL Mumbai"}]}
JSON 数据有“operator_id”和“operator_name”。
我必须从 url 获取并在微调器中仅显示“operator_name”。
我已经实现了上述。请查找main_activity以供引用
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
spinner = (Spinner) findViewById(R.id.spinner);
plans = (TextView)findViewById(R.id.browseplans);
plans.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent in = new Intent(getApplicationContext(), BrowsePlans.class);
in.putExtra("operator_id", id_click);
startActivity(in);
}
});
SimpleDateFormat sdf = new SimpleDateFormat("ddMMyyyyHHmmss");
sdf.setTimeZone(TimeZone.getTimeZone("GMT+5:30"));
currentDateandTime = sdf.format(new Date());
apikey = API_KEY.toString();
currentDateandTime.toString();
codetohash = currentDateandTime + apikey;
SHA1Hash = computeSha1OfString(codetohash);
uri = new Uri.Builder()
.scheme("http")
.authority("xxx.in")
.path("atm")
.appendQueryParameter("op", "GetPrepaidServiceList")
.appendQueryParameter("responseType", "json")
.appendQueryParameter("time", currentDateandTime)
.appendQueryParameter("clientId", ClientId)
.appendQueryParameter("hash", SHA1Hash)
.build();
stringUri = uri.toString();
new DataFromServer().execute();
} //end onCreate()
private class DataFromServer extends AsyncTask<String, Void, Void> {
@Override
protected void onPreExecute() {
}
@Override
protected Void doInBackground(String... params) {
try {
url = new URL(stringUri);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("OST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Host", "xxx.in");
/* Uri.Builder builder = new Uri.Builder()
.appendQueryParameter("val1", from)
.appendQueryParameter("val2", to);
String query = builder.build().getEncodedQuery();
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
writer.write(query);
writer.flush();
writer.close();
os.close();*/
conn.connect();
reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
text = sb.toString();
} catch (Exception ex) {
ex.toString();
} finally {
try {
reader.close();
} catch (Exception ex) {
ex.toString();
}
}
/*//only for json object not array
JSONObject parentObject = new JSONObject(text);
name = parentObject.getString("Hello");*/
try {
JSONObject jsonObj = new JSONObject(text);
// Getting JSON Array node
JSONArray jsonArray = jsonObj.getJSONArray("repaidServiceList");
// looping through All Contacts
for (int i = 0; i < jsonArray.length(); i++) {
c = jsonArray.getJSONObject(i);
id = c.getString("operator_id");
name = c.getString("operator_name");
list.add(name);
}
} catch (Exception e) {
e.toString();
}
return null;
}
@Override
protected void onPostExecute(Void unused) {
ArrayAdapter adapter =
new ArrayAdapter(getApplication(), R.layout.list_item, R.id.text1, list);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View view, int position, long id) {
int item = spinner.getSelectedItemPosition();
id_click = spinner.getSelectedItem().toString();
}
public void onNothingSelected(AdapterView<?> arg0) {
}
});
}
}
问题:
我可以使用“onItemSelectedListener”从微调器中获取用户选择的“operator_name”。
但我需要用户选择的“operator_name”的“operator_id”
我必须将选择的确切用户“operator_id”传递给另一个类。
如果我直接传递operator_id，它只有最后一个不是用户选择的id。
我很困惑，不知道如何实现。
任何帮助将不胜感激。
谢谢。
Best Answer-推荐答案
试试这个对我有用的方法
class LoadAlbums extends AsyncTask<String, String, ArrayList<HashMap<String,String>>> {
ArrayAdapter<String> adaptercountry ;
@Override
protected void onPreExecute() {
super.onPreExecute();
}
protected ArrayList<HashMap<String,String>> doInBackground(String... args) {
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
data = new ArrayList<HashMap<String, String>>();
String jsonStr = sh.makeServiceCall(COUNTRY_URL, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node your array
country_list = jsonObj.getJSONArray(COUNTRY_LIST);
// looping through All Contacts
for (int i = 0; i < country_list.length(); i++) {
JSONObject c = country_list.getJSONObject(i);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(OP_ID, c.getString(OP_ID));
map.put(OP_NAME,c.getString(OP_NAME));
data.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return data;
}
protected void onPostExecute(ArrayList<HashMap<String,String>> result) {
super.onPostExecute(result);
String[] arrConuntry=new String[data.size()];
for(int index=0;index<data.size();index++){
HashMap<String, String> map=data.get(index);
arrConuntry[index]=map.get(OP_NAME);
}
// pass arrConuntry array to ArrayAdapter<String> constroctor :
adaptercountry = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_spinner_dropdown_item,
arrConuntry);
spcountry.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View w) {
new AlertDialog.Builder(getActivity())
.setTitle("Select")
.setAdapter(adaptercountry, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
spcountry.setText(adaptercountry.getItem(which).toString());
try {
cname=country_list.getJSONObject(which).getString("operator_id");
Log.d("Response: ", "> " + cname);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
dialog.dismiss();
}
}).create().show();
}
});
}
关于android - 如何从 JSON 响应中获取选定的微调器项目的 ID？，我们在Stack Overflow上找到一个类似的问题：
https://stackoverflow.com/questions/34564440/
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