Please help im newbie for android and im try to make json parse with spinner with this code, but i have an error message "java.lang.NullPointerException", please help to fix my code..
@SuppressWarnings("deprecation")
public class evaluasi extends Activity{
InputStream is = null;
String result = null;
String line = null;
JSONObject jsonobject;
JSONArray jsonarray;
ArrayList<String> worldlist;
@Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.lay_evaluasi);
/*parsing ke broker*/
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.androidbegin.com/tutorial/jsonparsetutorial.txt");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
Log.e("Pass 1", "Sucsess..");
}catch (Exception e){
Log.e("Fail 1", e.toString());
Toast.makeText(getApplicationContext(), "Invalid IP Address", Toast.LENGTH_SHORT).show();
}
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
while((line = reader.readLine()) !=null )
{
sb.append(line + "\n");
}
is.close();
result = sb.toString();
Log.e("Pass 2", "Connection Sucess");
}catch (Exception e){
Log.e("Fail 2", "Failed Connection");
}
try{
worldlist =new ArrayList<String>();
jsonarray = jsonobject.getJSONArray("worldpopulation");
for (int i = 0; i < jsonarray.length(); i++) {
worldlist.add(jsonobject.optString("country"));
}
Spinner spinbro = (Spinner) findViewById(R.id.spinbrokced);
spinbro.setAdapter(new ArrayAdapter<String>(evaluasi.this,
android.R.layout.simple_spinner_dropdown_item,
worldlist));
}catch (Exception e){
Log.e("Fail 3", e.toString());
Toast.makeText(getApplicationContext(), "cant load data", Toast.LENGTH_SHORT).show();
}
}
//end parsin broker
-Hello you have done declaration of
jsonobject
but you have not initialized it so your code should be ...