Develop Reference

Spinner not filled with ArrayAdapter

So my spinner isn't being filled programatically:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_first_boot__language_selection, container, false);
setupSpinner(view, R.id.firstLanguageSpinner, R.array.languagesSpinner);
setupSpinner(view, R.id.secondLanguageSpinner, R.array.languagesSpinner);
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_first_boot__language_selection, container, false);
}
private void setupSpinner(View view, int spinnerResourceId, int arrayResourceId) {
Spinner spinner = view.findViewById(spinnerResourceId);
spinner.setSelection(1);
//Adapts strings into CharSequence.
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this.getContext(), arrayResourceId, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
}
However I cannot for the life of me figure out why not? I would fill it via XML, however this code doesn't include other functions that I had added. For instance, in setupSpinner, I had added the onClickListener event, which wasn't working.

In onCreateView you should be using return view;, not return inflater.inflate... What you are doing is inflating a second copy of the fragment, which is not initialized with spinner data.

Autocomplete Text is not working in android fragment

I want to set autocomplete text in my application. The suggestion values will fetch from the database. But for a trial I made a string array for the suggestion values. It works fine when I implement it on an activity but not working in fragment.
In place of getActivity function I tried:
1) getContext()
2) this.getActivity()
3) (Search_Bus)getActivity()
but none work...
it's giving me error:
Attempt to invoke virtual method on a null object reference
Here's my code...
public class Bus_Schedule_tab3 extends Fragment {
AutoCompleteTextView autoCompleteTextView;
ArrayList<String> array;
ArrayAdapter<String> adapter;
String[] stop_names;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.bus_schedule_tab3, container, false);
stop_names = new String[] {"usa","china","russia","bangladesh"};
autoCompleteTextView = (AutoCompleteTextView)rootView.findViewById(R.id.autoCompleteTextView2);
adapter = new ArrayAdapter<String>(getActivity(),R.layout.support_simple_spinner_dropdown_item,stop_names);
autoCompleteTextView.setAdapter(adapter);
return rootView;
}

Its working for me...You missed to set threshold
AutoCompleteTextView autoCompleteTextView;
ArrayAdapter<String> adapter;
String[] stop_names;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_test, container, false);
stop_names = new String[]{"usa", "china", "russia", "bangladesh"};
autoCompleteTextView = rootView.findViewById(R.id.autoCompleteTextView2);
adapter = new ArrayAdapter<>(getActivity(), R.layout.support_simple_spinner_dropdown_item, stop_names);
autoCompleteTextView.setThreshold(1);
autoCompleteTextView.setAdapter(adapter);
return rootView;
}

Set in your xml file android:completionThreshold.
<AutoCompleteTextView
android:id="#+id/id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:completionThreshold="1"
android:layout_weight="1"/>

Updating fragment view after setting listAdapter

I am converting an existing activity (SherlockActivity) into fragment (SherlockListFragment) in order to use tabs.
The fragment returns a onCreateView when created and is using the following code.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
/** Creating array adapter to set data in listview */
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity().getBaseContext(), android.R.layout.simple_list_item_multiple_choice, android_versions);
/** Setting the array adapter to the listview */
setListAdapter(adapter);
return super.onCreateView(inflater, container, savedInstanceState);
}
That works fine but as I was doing in my activity I want to update the list view with my own content after I finish fetching it from the server.
ListView listContent = (ListView) getView().findViewById(R.id.contentlist);
listContent.setAdapter(myAdapter);
Whatever I have researched so far, I am fetching the listview through activity and setting my adapter to it but that is having no effect on fragment view and it remains the same.
Question is: How can I update listView from outside onCreateView?

First, make your listview a global var. Then set its value on the onCreateView function:
ListView list;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_placelist, container, false);
list = rootView.findViewById(/*your id*/)
/** Creating array adapter to set data in listview */
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity().getBaseContext(), android.R.layout.simple_list_item_multiple_choice, android_versions);
/** Setting the array adapter to the listview */
setListAdapter(adapter);
return super.onCreateView(inflater, container, savedInstanceState);
}
//change your listview content here when refresh or something else
public void updateListView(){
List l = /*fetch new data from server*/
listAdapter.addAll(l);
listAdapter.notifyDataSetChanged();
}

ListView list;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_placelist, container, false);
list = rootView.findViewById(/*your id*/)
/** Creating array adapter to set data in listview */
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity().getBaseContext(), android.R.layout.simple_list_item_multiple_choice, android_versions);
/** Setting the array adapter to the listview */
setListAdapter(adapter);
return rootView;
}
from here android versions must be a arraylist or string array or hashmap

spinner won't populate from my array [duplicate]

This question already exists:
Spinner will not populate and won't set arrayadapter
Closed 8 years ago.
My app redirects me to a different screen from my home with the tap of a button. Once, i reach my city screen my spinner is visible. But it doesn't contain any elements from my array. Nothing force closes or anything, but it doesn't work.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_city);
if (savedInstanceState == null) {
getFragmentManager().beginTransaction().add(R.id.container, new PlaceholderFragment()).commit();
}
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_city, container, false);
String[] test = {"test1", "test2"};
Spinner spin = (Spinner) v.findViewById(R.id.countries);
ArrayAdapter<String> adapt = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, test);
adapt.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin.setAdapter(adapt);
return v;
}

You need to have the below.
public static PlaceHolderFragment extends Fragment
{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_city, container, false);
String[] test = {"test1", "test2"};
Spinner spin = (Spinner) v.findViewById(R.id.countries);
ArrayAdapter<String> adapt = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_item, test);
adapt.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin.setAdapter(adapt);
return v;
}
}
Also use getActivity() to get the context of hosting activity.

Adapter in Spinner, Android

How do i set the adapter in Spinner for the following bunch of code? I should set the adapter under
//set adapter for spinner here
public class ListViewFragment extends Fragment implements OnItemSelectedListener{
public ListViewFragment(){}
Spinner mspinner; //declare spinner globally
ArrayAdapter<String> adapter;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_listview, container, false);
mspinner = (Spinner) view.findViewById(R.id.spinner1);
//set adapter for spinner here
return rootView;
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
//do something when particular item is selected from spinner
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
}

Try this , Hope it works
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_listview, container, false);
mspinner = (Spinner) view.findViewById(R.id.spinner1);
//set adapter for spinner here
// you need to create a array which one is added to spinner
String [] name = {"A","B","C"};
adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,name);
// you can use getActivity() or this
mspinner.setAdapter(adapter);
return rootView;
}
Thank you

//here are the contents its the same as you do in a listview it can be a ArrayList or a array
String[] content={"A","B","C"};
adapter=new ArrayAdapter<String>(getActivity(),android.R.layout.simple_spinner_dropdown_item,content);
mspinner.setAdapter(adapter);
try this hope this will work for you!!