Getting error in AutoComplete TextView of null pointer exception.
when I extend an Activity then it works, but when I extend fragments, it doesn't show the options in AutocompleteTextView.
getting error like :-
E/Fail 3: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
Here the complete code :-
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
// don't look at this layout it's just a listView to show how to handle the keyboard
View view = inflater.inflate(R.layout.activity_add__visit, container, false);
session = new SessionManager(getActivity());
HashMap<String, String> user = session.getUserDetails();
uid = user.get(SessionManager.KEY_ID);
longi = (TextView)view. findViewById(R.id.longitude);
lat= (TextView)view. findViewById(R.id.latitude);
ac=(AutoCompleteTextView)view.findViewById(R.id.autoCompleteTextView1);
remarks = (EditText)view.findViewById(R.id.remarks);
submit=(Button)view.findViewById(R.id.submit);
new DownloadJSON().execute();
submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
remark_detail = remarks.getText().toString();
id = ac.getText().toString();
latitude12=lat.getText().toString();
longitude12=longi.getText().toString();
if (id.equals(null) || id.equals(""))
{
Toast.makeText(getActivity(), "Please Select Party Name", Toast.LENGTH_LONG).show();
} else
{
GetCurrentGPSLocation gps = new GetCurrentGPSLocation(getActivity());
// check if GPS enabled
if (gps.canGetLocation()) {
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
// \n is for new line
lat.setText( ""+latitude);
longi.setText("" +longitude);
latitude12=lat.getText().toString();
longitude12=longi.getText().toString();
Toast.makeText(getActivity(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
longi.setVisibility(View.INVISIBLE);
lat.setVisibility(View.INVISIBLE);
} else {
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
addvisitor();
//FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
//fragmentTransaction.replace(R.id.containerView,new Home()).commit();
}
}
});
return view;
}
private class DownloadJSON extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(getActivity());
mProgressDialog.setTitle("Please Wait");
// Set progressdialog message
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
// Show progressdialog
mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... voids) {
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.wealinfotech.com/portal/autocomplete.php");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
Log.e("Pass 1", "connection success ");
} catch (Exception e) {
Log.e("Fail 1", e.toString());
Toast.makeText(getActivity(), "Invalid IP Address", Toast.LENGTH_LONG).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 success ");
} catch (Exception e) {
Log.e("Fail 2", e.toString());
}
return null;
}
@Override
protected void onPostExecute(Void args) {
try {
JSONArray JA = new JSONArray(result);
JSONObject json = null;
final String[] str1 = new String[JA.length()];
final String[] str2 = new String[JA.length()];
for (int i = 0; i < JA.length(); i++) {
json = JA.getJSONObject(i);
str1[i] = json.getString("cl_pname");
str2[i] = json.getString("cl_wodcode");
}
final AutoCompleteTextView text = (AutoCompleteTextView)view. findViewById(R.id.autoCompleteTextView1);
final List<String> list = new ArrayList<String>();
for (int i = 0; i < str1.length; i++) {
list.add(str1[i]);
}
Collections.sort(list);
final ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getActivity(), R.layout.my_list_item, list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_list_item_1);
text.setThreshold(1);
text.setAdapter(dataAdapter);
text.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String selected_cl_pname = (String) parent.getItemAtPosition(position);
int index = Arrays.asList(str1).indexOf(selected_cl_pname);
String selected_cl_wodcode = str2[index];
wv1 = (WebView)view. findViewById(R.id.webView);
wv1.setWebViewClient(new MyBrowser());
wv1.loadUrl("http://www.wealinfotech.com/portal/on_target.php?cl_wodcode=" + selected_cl_wodcode);
wv1.getSettings().setLoadsImagesAutomatically(true);
wv1.getSettings().setJavaScriptEnabled(true);
wv1.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
Toast.makeText(getActivity(), (CharSequence) parent.getItemAtPosition(position), Toast.LENGTH_LONG).show();
Log.d("wt_wod_code", selected_cl_wodcode);
Log.d("wt_wod_sascode", str2[index]);
// Toast.makeText(getApplicationContext(), (CharSequence) parent.getItemAtPosition(position), Toast.LENGTH_LONG).show();
wt_wod_code1 = text.getText().toString();
wt_party1 = text.getText().toString();
}
});
} catch (Exception e) {
Log.e("Fail 3", e.toString());
mProgressDialog.dismiss();
}
}
Try to replace:
final AutoCompleteTextView text = (AutoCompleteTextView) view.findViewById(R.id.autoCompleteTextView1);
With:
final AutoCompleteTextView text = (AutoCompleteTextView) getView().findViewById(R.id.autoCompleteTextView1);
And similarly:
wv1 = (WebView) view.findViewById(R.id.webView);
with:
wv1 = (WebView) getView().findViewById(R.id.webView);
You are probably using an instance variable view (that you didn't mention about in the question and the sample pasted code) that is not initialized while you are trying to use it.
EDIT:
It is highly recommended that you call new DownloadJSON().execute(); in onViewCreated() rather than onCreatView(). This solution would work but only when the View is created before the response is fetched from the server, if the network is too fast and device is slow for some reason, it will fail to work.
