问题
I have the JSON format of countries and states, how can i add countries in one Spinner and get corresponding state in another spinner, my JSON format of counties and state is:
[
{
"Country": "Afghanistan",
"State": [
"Badakhshan",
"Badgis",
"Baglan",
"Balkh",
"Bamiyan",
"Farah",
"Faryab",
"Gawr",
"Gazni",
"Herat",
"Hilmand",
"Jawzjan",
"Kabul",
"Kapisa",
"Khawst",
"Kunar",
"Lagman",
"Lawghar",
"Nangarhar",
"Nimruz",
"Nuristan",
"Paktika",
"Paktiya",
"Parwan",
"Qandahar",
"Qunduz",
"Samangan",
"Sar-e Pul",
"Takhar",
"Uruzgan",
"Wardag",
"Zabul"
]
},
{
"Country": "Albania",
"State": [
"Badakhshan",
"Badgis",
"Baglan",
"Balkh",
"Bamiyan",
"Farah",
"Faryab",
"Gawr",
"Gazni",
"Herat",
"Hilmand",
"Jawzjan",
"Kabul",
"Kapisa",
"Khawst",
"Kunar",
"Lagman",
"Lawghar",
"Nangarhar",
"Nimruz",
"Nuristan",
"Paktika",
"Paktiya",
"Parwan",
"Qandahar",
"Qunduz",
"Samangan",
"Sar-e Pul",
"Takhar",
"Uruzgan",
"Wardag",
"Zabul",
"Berat",
"Bulqize",
"Delvine",
"Devoll",
"Dibre",
"Durres",
"Elbasan",
"Fier",
"Gjirokaster",
"Gramsh",
"Has",
"Kavaje",
"Kolonje",
"Korce",
"Kruje",
"Kucove",
"Kukes",
"Kurbin",
"Lezhe",
"Librazhd",
"Lushnje",
"Mallakaster",
"Malsi e Madhe",
"Mat",
"Mirdite",
"Peqin",
"Permet",
"Pogradec",
"Puke",
"Sarande",
"Shkoder",
"Skrapar",
"Tepelene",
"Tirane",
"Tropoje",
"Vlore"
]
},
I search on many resources but i cant find proper way to do the above method. Everyone doing it on by adding the countries in custom array, please help me to solve this problem.
回答1:
you need to do following steps,
- get data from json,
- add array of country and add array state from json
- now,
OnItemSelectedof country position bind state accordingly
EX:
//Setting Adapter for country spinner
if (stateDataList != null && stateDataList.size() > 0) {
StateSpinnerAdapter StateAdapter = new StateSpinnerAdapter(this, stateDataList);
SpinState.setAdapter(StateAdapter);
}
than setOnItemSelectedListener country spinner to get states
private ArrayList<ModelStateDetails> stateDataList;
SpinState.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int position, long l) {
if (position > 0) {
new LongOperation().execute("" + position);
Log.e(5, "state code", "-->>" + position);
}
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
回答2:
i have implemented same for finding locale in provience. This example uses 3 spinner.you can use according to your need.
//set onItemSelected Listener
spinProvince.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String province = (String)parent.getItemAtPosition(position);
if(province.matches("Eastern Cape")){
spinPro = 1;
populateDist();
}
else if(province.matches("Free State")){
spinPro = 2;
populateDist();
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
Toast.makeText(Reg_Prop.this, "Please select the Province where the Property is located", Toast.LENGTH_LONG).show();
}
});
spinDistrict.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String spinDist = (String)parent.getItemAtPosition(position);
if(spinDist.matches("Buffalo City") && spinPro == 1){
dist = 1;
populateLocal();
}
else if(spinDist.matches("Nelson Mandela Bay") && spinPro == 1){
dist = 2;
populateLocal();
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
/* Functions to populate the spinners*/
void populateDist(){
//Eatern Cape
if(spinPro == 1){
String [] ec = {"Select District/Metro *", "Buffalo City", "Nelson Mandela Bay",
"Alfred Nzo District", "Amathole District", "Chris Hani District",
"Joe Gqabi District", "OR Tambo District", "Cacadu District"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, ec);
spinDistrict.setAdapter(adapter);
}
//Free State
else if(spinPro == 2){
String [] fs = {"Select District/Metro *", "Mangaung Metropolitan", "Fezile Dabi District",
"Lejweleputswa District", "Thabo Mofutsanyana District", "Xhariep District"};
ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, fs);
spinDistrict.setAdapter(adapter2);
}
}
void populateLocal(){
//Baffalo City
if(dist == 1){
String [] bc = {"Buffalo City"};
ArrayAdapter<String> adapterL1 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, bc);
spinLocal.setAdapter(adapterL1);
}
//Nelson Mandela Bay
else if(dist == 2){
String [] nmb = {"Nelson Mandela Bay"};
ArrayAdapter<String> adapterL2 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, nmb);
spinLocal.setAdapter(adapterL2);
}
}
来源：https://stackoverflow.com/questions/39405148/how-can-i-get-countries-and-states-from-json-and-populate-it-on-spinner