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我有把它的項目動態地從我的數據庫，但問題是我不知道哪個項目是由法setOnItemSelectedListener微調setOnItemSelectedListener不起作用
這裏選擇一個微調是我的Java代碼：
public class Choix extends Activity {
JSONArray ja1 = null;
List<String> list = new ArrayList<String>();
ArrayAdapter<String> dataAdapter;
Spinner spinner;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.choix_espace);
spinner = (Spinner) findViewById(R.id.spinner);
liste_ecoles k = new liste_ecoles();
k.execute();
dataAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item, list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(), ""+arg2, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
private class liste_ecoles extends AsyncTask<String, Integer, Object> {
String ch1="";
@Override
protected Object doInBackground(String... params) {
JSONArray ja = null;
try {
URL twitter = new URL("...");
URLConnection tc = twitter.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(
tc.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
ja = new JSONArray(line);
}
} catch (Exception e) {
}
return ja;
}
@Override
protected void onPostExecute(Object resultat) {
JSONArray ja = (JSONArray) resultat;
if (resultat != null) {
try {
for (int i = 0; i < ja.length(); i++) {
JSONObject jo1 = null;
jo1 = ja.getJSONObject(i);
ch1 = jo1.getString("nom_ecole");
list.add(ch1);
}
}
catch (Exception e) {
}
}
}
}
}
那麼有人可以幫我嗎？