We Keep Coding

How do I use Searchablespinner feature?

I am trying to use the searchable spinner library but it is not working, here is the code. The spinner works well, But I would really like the search feature too from the library
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activityHome);
SearchableSpinner spinner = (SearchableSpinner) findViewById(R.id.spinner);
initControls();
}
private void initControls(){
SearchableSpinner spinner = (SearchableSpinner) findViewById(R.id.spinner);
spinner.setOnTouchListener(new View.OnTouchListener(){
#Override
public boolean onTouch(View v, MotionEvent event) {
isSpinnerTouched = true;
return false;
}
});
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
if(isSpinnerTouched){
selectedItem = adapterView.getItemAtPosition(i).toString();
code = getCode(selectedItem);
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
proceed_button_new = (TextView) findViewById(R.id.proceed_button_new);
proceed_button_new.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View view) {
}
});
List<Food> data = getData();
List<String> foodNames = getFoodNamesFromData(data);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item, foodNames);
spinner.setAdapter(adapter);
}

how to call dialog fragment with listview and search filter from a fragment and save selected item value in parent fragment as string?

public class fragment_oneway_flight extends Fragment {
private Spinner spinner1 ;
Context thiscontext;
private int mYear, mMonth, mDay, mHour, mMinute;
int countadult= 1;
int countchild= 0;
int countinfant= 0;
private ProgressDialog pDialog,pDialog1;
TextView quantity_adult_textview, quantity_child_textview, quantity_infant_textview, textview_city_slct_from_oneway, textview_city_slct_to_oneway;
private ImageButton increment_adult_Button, decrement_adult_Button, increment_child_Button, decrement_child_Button, increment_infant_Button, decrement_infant_Button;
private Button prcdtoonwyrslt;
public fragment_oneway_flight() {
// Required empty public constructor
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
thiscontext = container.getContext();
View rootView = inflater.inflate(R.layout.fragment_oneway_flight, container, false);
LinearLayout select_dep_date = (LinearLayout) rootView.findViewById(R.id.date_from_select_oneway);
select_dep_date.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogFragment dFragment = new DatePickerFragment();
// Show the date picker dialog fragment
dFragment.show(getFragmentManager(), "Date Picker");
}
});
LinearLayout city_slct_from_oneway = (LinearLayout) rootView.findViewById(R.id.city_slct_from_oneway);
city_slct_from_oneway.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogBoxFragment DialogBoxFragment = new DialogBoxFragment ();
DialogBoxFragment.show(getFragmentManager(),"dialog");
}
});
LinearLayout city_slct_to_oneway = (LinearLayout) rootView.findViewById(R.id.city_slct_to_oneway);
city_slct_to_oneway.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogBoxFragment2 DialogBoxFragment2 = new DialogBoxFragment2 ();
DialogBoxFragment2.show(getFragmentManager(),"dialog2");
}
});
prcdtoonwyrslt = (Button) rootView.findViewById( R.id.prcdtoonwyrslt );
prcdtoonwyrslt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), activity_flight_result_oneway.class);
pDialog1 = new ProgressDialog(getActivity());
pDialog1.setMessage("Please Wait...");
pDialog1.setCancelable(false);
String countadult = quantity_adult_textview.getText().toString();
String countchild = quantity_child_textview.getText().toString();
String countinfant = quantity_infant_textview.getText().toString();
String selectedfromcity = textview_city_slct_from_oneway.getText().toString();
String selectedtocity = textview_city_slct_to_oneway.getText().toString();
intent.putExtra("adultsnos", countadult);
intent.putExtra("childsnos", countchild);
intent.putExtra("infantsnos", countinfant);
intent.putExtra("fromcity", selectedfromcity);
intent.putExtra("tocity", selectedtocity);
startActivity(intent);
}
});
// button function start
increment_adult_Button = (ImageButton) rootView.findViewById( R.id.increment_adult_Button );
decrement_adult_Button = (ImageButton) rootView.findViewById( R.id.decrement_adult_Button );
increment_child_Button = (ImageButton) rootView.findViewById( R.id.increment_child_Button );
decrement_child_Button = (ImageButton) rootView.findViewById( R.id.decrement_child_Button );
increment_infant_Button = (ImageButton) rootView.findViewById( R.id.increment_infant_Button );
decrement_infant_Button = (ImageButton) rootView.findViewById( R.id.decrement_infant_Button );
quantity_adult_textview = (TextView) rootView.findViewById(R.id.quantity_adult_textview);
quantity_child_textview = (TextView) rootView.findViewById(R.id.quantity_child_textview);
quantity_infant_textview = (TextView) rootView.findViewById(R.id.quantity_infant_textview);
increment_adult_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countadult++;
if(countadult>7){
countadult=7;
}
display(countadult);
}
});
decrement_adult_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countadult--;
if(countadult<1){
countadult=1;
}
display(countadult);
}
});
increment_child_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countchild++;
if(countchild>5){
countchild=5;
}
display(countchild);
}
});
decrement_child_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countchild--;
if(countchild<0){
countchild=0;
}
display(countchild);
}
});
increment_infant_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countinfant++;
if(countinfant>5){
countinfant=5;
}
display(countinfant);
}
});
decrement_infant_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countinfant--;
if(countinfant<0){
countinfant=0;
}
display(countinfant);
}
});
// button function end
setSpinnerContent( rootView );
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> id, View rootView, int pos, long arg3) {
if (pos == 0) {
Toast.makeText(getActivity().getApplicationContext(),
"Select Class", Toast.LENGTH_SHORT)
.show();
} else if (pos == 1) {
Toast.makeText(getActivity().getApplicationContext(),
"You have selected Economy", Toast.LENGTH_SHORT)
.show();
} else if (pos == 2) {
Toast.makeText(getActivity().getApplicationContext(),
"You have selected Premium Economy", Toast.LENGTH_SHORT)
.show();
} else if (pos == 3) {
Toast.makeText(getActivity().getApplicationContext(),
"You have selected Business", Toast.LENGTH_SHORT)
.show();
}else if (pos == 4) {
Toast.makeText(getActivity().getApplicationContext(),
"You have selected First Class", Toast.LENGTH_SHORT)
.show();
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
Toast.makeText(getActivity().getApplicationContext(), "Nothing to select", Toast.LENGTH_LONG).show();
}
});
return rootView;
}
private void setSpinnerContent( View rootView ) {
spinner1 = (Spinner) rootView.findViewById( R.id.spinner_flight );
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(), R.array.flight_class_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter( adapter );
}
public static class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener{
#Override
public Dialog onCreateDialog(Bundle savedInstanceState){
final Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day = calendar.get(Calendar.DAY_OF_MONTH);
/*
Initialize a new DatePickerDialog
DatePickerDialog(Context context, DatePickerDialog.OnDateSetListener callBack,
int year, int monthOfYear, int dayOfMonth)
*/
DatePickerDialog dpd = new DatePickerDialog(getActivity(), R.style.DateDialog,this,year,month,day);
return dpd;
}
public void onDateSet(DatePicker view, int year, int month, int day){
// Do something with the chosen date
TextView dep_date_flight = (TextView) getActivity().findViewById(R.id.text_dep_date);
// Create a Date variable/object with user chosen date
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(0);
cal.set(year, month, day, 0, 0, 0);
Date chosenDate = cal.getTime();
// Format the date using style and locale
DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM, Locale.US);
String formattedDate = df.format(chosenDate);
// Display the chosen date to app interface
dep_date_flight.setText(formattedDate);
}
}
private void display(int number) {
quantity_adult_textview.setText(String.valueOf(countadult));
quantity_child_textview.setText(String.valueOf(countchild));
quantity_infant_textview.setText(String.valueOf(countinfant));
}
public static class DialogBoxFragment extends DialogFragment {
//declaring variables
private ListView listviewforresults;
//Adapter for listview
ArrayAdapter<String> list1adapter;
//Edittext for search
EditText searchdata;
//ArrayList for listview
ArrayList<String> data=new ArrayList<String>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View rootView1 = inflater.inflate(R.layout.fragment_city_select_flight, container, false);
prepareDummyData();
listviewforresults=(ListView)rootView1.findViewById(R.id.showdata);
searchdata=(EditText)rootView1.findViewById(R.id.searchdata);
//set data to Adapter
list1adapter=new ArrayAdapter<String>(getActivity(), country_list,R.id.results,data);
listviewforresults.setAdapter(list1adapter);
//search data when text changes in edittext
searchdata.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
list1adapter.getFilter().filter(s);
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
}
});
listviewforresults.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
String selectedFromList = (String) listviewforresults.getItemAtPosition(position).toString();
TextView textview_city_slct_from_oneway = (TextView) getActivity().findViewById(R.id.textview_city_slct_from_oneway);
textview_city_slct_from_oneway.setText(selectedFromList);
getDialog().dismiss();
}
});
getDialog().setTitle("dialog");
return rootView1;
}
public void prepareDummyData()
{
data.add("Chennai");
data.add("Mumbai");
data.add("Bangalore");
data.add("Madurai");
data.add("Coimbatore");
data.add("Newdelhi");
}
}
public static class DialogBoxFragment2 extends DialogFragment {
//declaring variables
private ListView listviewforresults2;
//Adapter for listview
ArrayAdapter<String> list2adapter;
//Edittext for search
EditText searchdata;
//ArrayList for listview
ArrayList<String> data=new ArrayList<String>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View rootView2 = inflater.inflate(R.layout.fragment_city_select_flight2, container, false);
prepareDummyData2();
listviewforresults2=(ListView)rootView2.findViewById(R.id.showdata);
searchdata=(EditText)rootView2.findViewById(R.id.searchdata);
//set data to Adapter
list2adapter=new ArrayAdapter<String>(getActivity(), country_list,R.id.results,data);
listviewforresults2.setAdapter(list2adapter);
//search data when text changes in edittext
searchdata.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
list2adapter.getFilter().filter(s);
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
}
});
listviewforresults2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
String selectedFromList2 = (String) listviewforresults2.getItemAtPosition(position).toString();
TextView textview_city_slct_to_oneway = (TextView) getActivity().findViewById(R.id.textview_city_slct_to_oneway);
textview_city_slct_to_oneway.setText(selectedFromList2);
getDialog().dismiss();
}
});
getDialog().setTitle("dialog2");
return rootView2;
}
public void prepareDummyData2() {
data.add("Chennai");
data.add("Mumbai");
data.add("Bangalore");
data.add("Madurai");
data.add("Coimbatore");
data.add("Newdelhi");
}
}
}
the above code is full fragment code with gialog innerclass too. im a beginner can you gys help me out of it?
and actually what i need is i have to click the from and to area in tab view fragment. after slecting it opens a dialog with search filter and listview. after clicking any list item it should diaplay in textview on parent fragment and after that i should be able wo pass the value to next fragment using put intent method.
currently im getting null value when i pass it to the next fragment.
i dont know why.
i have attached an image to get you the clear view. please check it.see here

Can not get inside setOnItemSelectedListener from Spinner

Based on information from Android: Create spinner programmatically from array. I can select room choices from spinner based on ArrayList. However,it never get inside the process setOnItemSelectedListener.I cannot figure out why does it happen.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_room);
SpaceRoomTable = (TableLayout) findViewById(R.id.tvSpaceRoomTable);
AddroomButton = (Button)findViewById(R.id.btLinkAddRoom);
Backtomenu = (Button) findViewById(R.id.bBackToMenu_DogTrack);
Delete = ContextCompat.getDrawable(this, R.drawable.bin);
dropdown = (Spinner) findViewById(R.id.spinListRoom);
summitDelete = (Button) findViewById(R.id.btDeleteSummit);
AddroomButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent LinkToEditroom = new Intent (EditRoom.this,AddRoom.class);
startActivity(LinkToEditroom);
}
});
Backtomenu.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent LinkToHomeMenu = new Intent(EditRoom.this,HomeMenu.class);
EditRoom.this.startActivity(LinkToHomeMenu);
}
});
showRoom();
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,showitemName);
spinnerArrayAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
dropdown.setAdapter(spinnerArrayAdapter);
dropdown.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
// Log.d("TEST","selection is ");
Object Itemselected = adapterView.getItemAtPosition(i);
Toast.makeText(getApplicationContext(),"Inside"+String.valueOf(Itemselected),Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
}

In XML Layout :-
<Spinner
android:id="#+id/dropdown"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
then, in your activity findViewById like this:-
dropdown= (Spinner) findViewById(R.id.dropdown);
then Create an ArrayAdapter using the string array and a default spinner layout :-
ArrayAdapter<String> spinnerArrayAdapter = ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,showitemName);
spinnerArrayAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
dropdown.setAdapter(spinnerArrayAdapter);
For OnIemClickListener use like this:-
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener{
Spinner dropdown;
String[] showitemName = {"A","B","C","D","E"};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dropdown= (Spinner) findViewById(R.id.dropdown);
dropdown.setOnItemSelectedListener(this);
ArrayAdapter<String> spinnerArrayAdapter = ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,showitemName);
spinnerArrayAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
dropdown.setAdapter(spinnerArrayAdapter);
}
//Performing action onItemSelected and onNothing selected
#Override
public void onItemSelected(AdapterView<?> parent, View arg1, int position,long id) {
Toast.makeText(getApplicationContext(),"Inside" + parent.getItemAtPosition(position) , Toast.LENGTH_LONG).show();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
More information:
You can check in details from these links:-
https://developer.android.com/guide/topics/ui/controls/spinner.html
https://developer.android.com/reference/android/widget/AdapterView.OnItemSelectedListener.html
https://android--code.blogspot.in/2015/08/android-spinner-onitemselected.html
http://www.java2s.com/Code/Android/UI/SpinnerItemSelectedListener.htm
https://android--code.blogspot.in/2015/08/android-spinner-get-selected-item-text.html

For more Information about showroom method
public void showRoom()
{
refroom.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(final DataSnapshot dataSnapshot) {
int Length_Record = dataSnapshot.child("CurrentUser").child("Tracking").child("ListRoom").child("LIST_ROOM_LENGTH").getValue(int.class);
int RunRecord =0;
int printRoom =0;
final String userId = dataSnapshot.child("CurrentUser").child("UserId").getValue(String.class);
for (DataSnapshot zonesnapshot : dataSnapshot.child("CurrentUser").child("Tracking").child("ListRoom").getChildren())
{
if(printRoom!=Length_Record)
{
zonesnapshot.getValue();
String[] parts = String.valueOf(zonesnapshot.getValue()).split(",");
String part1 = parts[0]; // Room Id
String part2 = parts[1]; // Room Name
String part3 = parts[2]; // TypeRoom
String OnRoom = dataSnapshot.child("CurrentUser").child("Tracking").child("Location").getValue(String.class);
itemsName.add(part2+","+part3); // put to arraylist to prepare a room choice for deletion
showitemName.add(part2+"("+part3+")");
itemOfUser.put(userId+"Room"+printRoom,part2+","+part3); // keep room for each user
inRow(dataSnapshot.child("CurrentUser").child("UserId").getValue(String.class), RunRecord, part2, OnRoom, part3);
}
printRoom++;
}
summitDelete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
storageReference = storage.getInstance().getReferenceFromUrl("gs://********-*****.appspot.com/imagesRoom").child(userId).child(selection);
storageReference.delete().addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(getApplicationContext(),"Error Can not delete file",Toast.LENGTH_SHORT).show();
}
});
}
});
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}

below code will get the selected item text automatically
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
// Log.d("TEST","selection is ");
String item = adapterView.getItemAtPosition(i).toString();
Toast.makeText(getApplicationContext(),"Inside"+item,Toast.LENGTH_SHORT).show();
}

onListItemClick won't start

I'm trying to put onListItemClick, but when I start my app nothing happens with onListItemClick. Can anyone help me with this?
Here is my code:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
db = (new DatabaseHelper(this)).getWritableDatabase();
searchText = (EditText) findViewById(R.id.searchText);
employeeList = (ListView) findViewById(R.id.list);
Button searchButton = (Button) findViewById(R.id.searchButton);
searchButton.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
search(employeeList);
}
});
}
public void search(View view) {
// || is the concatenation operation in SQLite
cursor = db
.rawQuery(
"SELECT _id, firstName, lastName, title FROM employee WHERE firstName || ' ' || lastName LIKE ?",
new String[] { "%" + searchText.getText().toString()
+ "%" });
adapter = new SimpleCursorAdapter(this, R.layout.employee_list_item,
cursor, new String[] { "firstName", "lastName", "title" },
new int[] { R.id.firstName, R.id.lastName, R.id.title });
employeeList.setAdapter(adapter);
}
public void onListItemClick(ListView parent, View view, int position, long id) {
Intent intent = new Intent(this, EmployeeDetails.class);
Cursor cursor = (Cursor) adapter.getItem(position);
intent.putExtra("EMPLOYEE_ID", cursor.getInt(cursor.getColumnIndex("_id")));
startActivity(intent);
}
}
There is no error messages and search is working normally.

employeeList = (ListView) findViewById(R.id.list);
add these line below the above line
employeeList = (ListView) findViewById(R.id.list);
employeeList .setOnItemClickListener(this);
Updated:: sample code
public class SampleActivity extends Activity implements OnItemClickListener{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(mWebView);
}
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {
// TODO Auto-generated method stub
}
}

register an OnItemClickListener() with setOnItemClickListener for your listview like this
listView.setOnItemClickListener(new OnItemClickListener() {
#Override public void onItemClick(AdapterView<?> adapter, View view, int pos, long id) {
Intent intent = new Intent(this, EmployeeDetails.class);
Cursor cursor = (Cursor) adapter.getItem(pos);
intent.putExtra("EMPLOYEE_ID", cursor.getInt(cursor.getColumnIndex("_id")));
startActivity(intent);
}
});

You have to register your listener as listview.setOnItemClickListener(this) in your code.

Try this
listview.setOnItemClickListener(new OnItemClickListener() {
// Your Code Goes Here
});

Android Dynamic Spinner Update

I'm working with Android and Spinners and I need some help. I have a class that creates two spinners and a button. The first spinner is for my category, my second is for my sub-category. What I am trying to do is dynamically update the second spinner (spinner2). I've been trying to use adapter2.clear() but that crashes android, with an error "unable to start activity componentinfo unsupported operation"
Here is my code:
public class MyClass extends MyBaseClass
{
int category;
int sub_category;
ArrayAdapter<String> adapter2;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quizes);
//CATEGORY INFO
final String[] items1 = new String[] {"One", "Two", "Three"};
final Spinner spinner1 = (Spinner) findViewById(R.id.spinner1);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, items1);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter1);
//SUBCATEGORY INFO
final String[] items2 = new String[] {"SOne", "STwo", "SThree"};
final Spinner spinner2 = (Spinner) findViewById(R.id.spinner2);
adapter2 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, items2);
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(adapter2);
// Capture our button from layout
Button button = (Button)findViewById(R.id.button1);
// Register the onClick listener with the implementation above
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// do something when the button is clicked
startActivity(new Intent(MyClass.this, GoToOtherClass.class));
}
});
//SELECTOR CONTROL FOR SPINNER1 {CATEGORY}
spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
MyClass.this.category = spinner1.getSelectedItemPosition();
//OTHER STUFF
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
//SELECTOR CONTROL FOR SPINNER2 {SUB-CATEGORY}
spinner2.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
MyClass.this.sub_category = spinner2.getSelectedItemPosition();
//OTHER STUFF
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
return true;
}
}
I understand about the .clear()/.add() methods, but anytime I try clear()/add() my program crashes, what do I need to do to fix things so I can change the spinner2 contents for my sub-category list? Any advice would help, as I have spent hours doing things such as:
Object t=adapter2.getitem(0);
spinner2.remove((String) t);
or adapter2.clear() and a few other tricks and I have no further ideas left. I am still learning android. I've tried looking at some other posts here on stackoverflow and google but was not sure how to get their ideas working.

After you change the contents of the second Spinner, you need to call adapter2.notifyDataSetChanged(). Without that call, the UI won't update with the new contents of the Spinner, and you could also have problems referencing things that don't exist anymore.

Try this Code..
public class MainActivity extends Activity {
Spinner sp1,sp2;
ArrayAdapter<String> adp1,adp2;
List<String> l1,l2;
int pos;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
l1=new ArrayList<String>();
l1.add("A");
l1.add("B");
sp1= (Spinner) findViewById(R.id.spinner1);
sp2= (Spinner) findViewById(R.id.spinner2);
adp1=new ArrayAdapter<String> (this,android.R.layout.simple_dropdown_item_1line,l1);
adp1.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
sp1.setAdapter(adp1);
sp1.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
pos=arg2;
add();
}
private void add() {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(), ""+pos, Toast.LENGTH_SHORT).show();
switch(pos)
{
case 0:
l2= new ArrayList<String>();
l2.add("A 1");
l2.add("A 2");
adp2=new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_dropdown_item_1line,l2);
adp2.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
sp2.setAdapter(adp2);
select();
break;
case 1:
l2= new ArrayList<String>();
l2.add("B 1");
l2.add("B 2");
adp2=new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_dropdown_item_1line,l2);
adp2.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
sp2.setAdapter(adp2);
select();
break;
}
}
private void select() {
// TODO Auto-generated method stub
sp2.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(), "Test "+arg2, Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
}