How to set selected item of Spinner by value not by position

Question

I have a update view  where I need to preselect the value stored in database for a Spinner   I was having in mind something like this  but the Adapter has no indexOf method  so I am stuck   void setSpinner String value        int pos   getSpinnerField   getAdapter   indexOf value       getSpinnerField   setSelection pos

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Here is my hopefully complete solution  I have following enum   public enum HTTPMethod  GET  HEAD    used in following class  public class WebAddressRecord       public HTTPMethod AccessMethod   HTTPMethod HEAD        Code to set the spinner by HTTPMethod enum-member       Spinner mySpinner    Spinner  findViewById R id spinnerHttpmethod       ArrayAdapter lt HTTPMethod gt  adapter   new ArrayAdapter lt HTTPMethod gt  this  android R layout simple spinner item  HTTPMethod values         mySpinner setAdapter adapter       int selectionPosition  adapter getPosition webAddressRecord AccessMethod       mySpinner setSelection selectionPosition     Where R id spinnerHttpmethod is defined in a layout-file  and android R layout simple spinner item is delivered by android-studio

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I am using a custom adapter  for that this code is enough   yourSpinner setSelection arrayAdapter getPosition  Your Desired Text       So  your code snippet will be like this   void setSpinner String value                 yourSpinner setSelection arrayAdapter getPosition value

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To make the application remember the last selected spinner values  you can use below code    Below code reads the spinner value and sets the spinner position accordingly       public class MainActivity extends Activity    Override protected void onCreate Bundle savedInstanceState     super onCreate savedInstanceState   setContentView R layout activity main    int spinnerPosition   Spinner spinner1    Spinner  findViewById R id spinner1   ArrayAdapter lt CharSequence gt  adapter1   ArrayAdapter createFromResource          this  R array ccy array          android R layout simple spinner dropdown item   adapter1 setDropDownViewResource android R layout simple list item activated 1      Apply the adapter to the spinner spinner1 setAdapter adapter1      changes to remember last spinner position spinnerPosition   0  String strpos1   prfs getString  SPINNER1 VALUE        if  strpos1    null     strpos1 equals null      strpos1 equals            strpos1   prfs getString  SPINNER1 VALUE            spinnerPosition   adapter1 getPosition strpos1       spinner1 setSelection spinnerPosition       spinnerPosition   0     And put below code where you know latest spinner values are present  or somewhere else as required  This piece of code basically writes the spinner value in SharedPreferences       Spinner spinner1    Spinner  findViewById R id spinner1       String spinlong1   spinner1 getSelectedItem   toString        SharedPreferences prfs   getSharedPreferences  WHATEVER               Context MODE PRIVATE       SharedPreferences Editor editor   prfs edit        editor putString  SPINNER1 VALUE   spinlong1       editor commit

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You can use this way  just make your code more simple and more clear   ArrayAdapter lt String gt  adapter    ArrayAdapter lt String gt   spinnerCountry getAdapter    int position   adapter getPosition obj getCountry     spinnerCountry setSelection position     Hope it helps

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As some of the previous answers are very right  I just want to make sure from none of you fall in such this problem   If you set the values to the ArrayList using String format  you MUST get the position of the value using the same string structure String format   An example   ArrayList lt String gt  myList   new ArrayList lt  gt     myList add String format Locale getDefault      d   30    myList add String format Locale getDefault      d   50    myList add String format Locale getDefault      d   70    myList add String format Locale getDefault      d   100      You must get the position of needed value like this   myList setSelection myAdapter getPosition String format Locale getDefault      d   70       Otherwise  you ll get the -1  item not found   I used Locale getDefault   because of Arabic language   I hope that will be helpful for you

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This is my simple method to get the index by string   private int getIndexByString Spinner spinner  String string        int index   0       for  int i   0  i  lt  spinner getCount    i              if  spinner getItemAtPosition i  toString   equalsIgnoreCase string                 index   i              break                      return index

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Use following line to select using value   mSpinner setSelection yourList indexOf  value

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if you are using string array this is the best way       int selectionPosition  adapter getPosition  YOUR VALUE    spinner setSelection selectionPosition

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You can use this also   String   baths   getResources   getStringArray R array array baths   mSpnBaths setSelection Arrays asList baths  indexOf value here

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Suppose your Spinner is named mSpinner  and it contains as one of its choices   some value    To find and compare the position of  some value  in the Spinner use this   String compareValue    some value   ArrayAdapter lt CharSequence gt  adapter   ArrayAdapter createFromResource this  R array select state  android R layout simple spinner item   adapter setDropDownViewResource android R layout simple spinner dropdown item   mSpinner setAdapter adapter   if  compareValue    null        int spinnerPosition   adapter getPosition compareValue       mSpinner setSelection spinnerPosition

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very simple just use getSelectedItem     eg    ArrayAdapter lt CharSequence gt  type ArrayAdapter createFromResource this R array admin typee android R layout simple spinner dropdown item           type setDropDownViewResource android R layout simple spinner dropdown item           mainType setAdapter type    String group mainType getSelectedItem   toString      the above method returns an string value   in the above the R array admin type is an string resource  file in values   just create an  xml file in values  strings

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Based on Merrill s answer  I came up with this single line solution    it s not very pretty  but you can blame whoever maintains the code for Spinner for neglecting to include a function that does this for that   mySpinner setSelection   ArrayAdapter lt String gt  mySpinner getAdapter    getPosition myString      You ll get a warning about how the cast to a ArrayAdapter lt String gt  is unchecked    really  you could just use an ArrayAdapter as Merrill did  but that just exchanges one warning for another

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If you need to have an indexOf method on any old Adapter  and you don t know the underlying implementation  then you can use this   private int indexOf final Adapter adapter  Object value        for  int index   0  count   adapter getCount    index  lt  count    index                if  adapter getItem index  equals value                         return index                      return -1

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I had the same issue when trying to select the correct item in a spinner populated using a cursorLoader  I retrieved the id of the item I wanted to select first from table 1 and then used a CursorLoader to populate the spinner  In the onLoadFinished I cycled through the cursor populating the spinner s adapter until I found the item that matched the id I already had  Then assigned the row number of the cursor to the spinner s selected position  It would be nice to have a similar function to pass in the id of the value you wish to select in the spinner when populating details on a form containing saved spinner results     Override public void onLoadFinished Loader lt Cursor gt  loader  Cursor cursor        adapter swapCursor cursor      cursor moveToFirst      int row count   0    int spinner row   0     while  spinner row  lt  0    row count  lt  cursor getCount        loop until end of cursor or the                                                                  ID is found       int cursorItemID   bCursor getInt cursor getColumnIndexOrThrow someTable COLUMN ID         if  knownID  cursorItemID       spinner row    row count     set the spinner row value to the same value as the cursor row         cursor moveToNext     row count             spinner setSelection spinner row      set the selected item in the spinner

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YourAdapter yourAdapter               new YourAdapter  getActivity                        R layout list view item arrData        yourAdapter  setDropDownViewResource R layout list view item       mySpinner setAdapter yourAdapter          String strCompare    Indonesia        for  int i   0  i  lt  arrData length   i             if arrData i  getCode   equalsIgnoreCase strCompare                    int spinnerPosition   yourAdapter getPosition arrData i                    mySpinner setSelection spinnerPosition

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Since I needed something  that also works with Localization  I came up with these two methods       private int getArrayPositionForValue final int arrayResId  final String value            final Resources english   Utils getLocalizedResources this  new Locale  en             final List lt String gt  arrayValues   Arrays asList english getStringArray arrayResId             for  int position   0  position  lt  arrayValues size    position                  if  arrayValues get position  equalsIgnoreCase value                     return position                                  Log w TAG   getArrayPosition   -- gt  return 0  fallback   No index found for value       value           return 0          As you can see  I also stumbled over additional complexity of case sensitivity between arrays xml and the value I am comparing against  If you don t have this  the above method can be simplified to something like   return arrayValues indexOf value    Static helper method  public static Resources getLocalizedResources Context context  Locale desiredLocale            Configuration conf   context getResources   getConfiguration            conf   new Configuration conf           conf setLocale desiredLocale           Context localizedContext   context createConfigurationContext conf           return localizedContext getResources

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Here is how to do it if you are using a SimpleCursorAdapter  where columnName is the name of the db column that you used to populate your spinner    private int getIndex Spinner spinner  String columnName  String searchString           Log d LOG TAG   getIndex     searchString              if  searchString    null    spinner getCount      0             return -1     Not found           else            Cursor cursor    Cursor spinner getItemAtPosition 0            int initialCursorPos   cursor getPosition        Remember for later          int index   -1     Not found         for  int i   0  i  lt  spinner getCount    i                   cursor moveToPosition i               String itemText   cursor getString cursor getColumnIndex columnName                 if  itemText equals searchString                     index   i     Found                  break                                   cursor moveToPosition initialCursorPos      Leave cursor as we found it           return index            Also  a refinement of Akhil s answer  this is the corresponding way to do it if you are filling your Spinner from an array   private int getIndex Spinner spinner  String searchString         if  searchString    null    spinner getCount      0             return -1     Not found            else            for  int i   0  i  lt  spinner getCount    i                  if  spinner getItemAtPosition i  toString   equals searchString                     return i     Found                                   return -1     Not found

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There is actually a way to get this using an index search on the AdapterArray and all this can be done with reflection   I even went one step further as I had 10 Spinners and wanted to set them dynamically from my database and the database holds the value only not the text as the Spinner actually changes week to week so the value is my id number from the database       Get the JSON object from db that was saved  10 spinner values already selected by user  JSONObject json   new JSONObject string    JSONArray jsonArray   json getJSONArray  answer         get the current class that Spinner is called in   Class lt   extends MyActivity gt  cls   this getClass         loop through all 10 spinners and set the values with reflection               for  int j 1  j lt  11  j            JSONObject obj   jsonArray getJSONObject j-1         String movieid   obj getString  id              spinners variable names are s1 s2 s3          Field field   cls getDeclaredField  s   j             find the actual position of value in the list            int datapos   indexedExactSearch Arrays asList Arrays asList this data  toArray      value   movieid             find the position in the array adapter       int pos   this adapter getPosition this data datapos              the position in the array adapter         Spinner field get this   setSelection pos        Here is the indexed search you can use on almost any list as long as the fields are on top level of object              Searches for exact match of the specified class field  key  value within the specified list     This uses a sequential search through each object in the list until a match is found or end    of the list reached   It may be necessary to convert a list of specific objects into generics     ie  LinkedList amp ltDevice amp gt needs to be passed as a List amp ltObject amp gt or Object  amp nbsp  by using     Arrays asList device toArray  amp nbsp            param list - list of objects to search through     param key - the class field containing the value     param value - the value to search for     return index of the list object with an exact match  -1 if not found      public static  lt T gt  int indexedExactSearch List lt Object gt  list  String key  String value        int low   0      int high   list size  -1      int index   low      String val            while  index  lt   high            try                 Field   c   list get index  getClass   getDeclaredFields                val   cast list get index  getClass   getDeclaredField key  get list get index      NONE              catch  SecurityException e                e printStackTrace              catch  NoSuchFieldException e                e printStackTrace              catch  IllegalArgumentException e                e printStackTrace              catch  IllegalAccessException e                e printStackTrace                       if  val equalsIgnoreCase value               return index     key found          index   index   1             return - low   1       key not found return -1     Cast method which can be create for all primitives  here is one for string and int                   Base String cast  return the value or default     param object - generic Object     param defaultValue - default value to give if Object is null     return - returns type String     public static String cast Object object  String defaultValue        return  object  null    object toString     defaultValue                  Base integer cast  return the value or default     param object - generic Object     param defaultValue - default value to give if Object is null     return - returns type integer     public static int cast Object object  int defaultValue         return castImpl object  defaultValue  intValue                   Base cast  return either the value or the default     param object - generic Object     param defaultValue - default value to give if Object is null     return - returns type Object     public static Object castImpl Object object  Object defaultValue        return object  null   object   defaultValue

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A simple way to set spinner based on value is  mySpinner setSelection getIndex mySpinner  myValue        private method of your class  private int getIndex Spinner spinner  String myString        for  int i 0 i lt spinner getCount   i              if  spinner getItemAtPosition i  toString   equalsIgnoreCase myString                 return i                          return 0        Way to complex code are already there  this is just much plainer

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Based on Merrill s answer here is how to do with a CursorAdapter  CursorAdapter myAdapter    CursorAdapter  spinner listino getAdapter      cast     for int i   0  i  lt  myAdapter getCount    i                  if  myAdapter getItemId i     ordine getListino                           this spinner listino setSelection i               break

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here is my solution  List lt Country gt  list   CountryBO GetCountries 0   CountriesAdapter dataAdapter   new CountriesAdapter this list   dataAdapter setDropDownViewResource android R layout simple spinner dropdown item   spnCountries setAdapter dataAdapter   spnCountries setSelection dataAdapter getItemIndexById userProfile GetCountryId        and getItemIndexById below  public int getItemIndexById String id        for  Country item   this items            if item GetId   toString   equals id toString                  return this items indexOf item                       return 0      Hope this help

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Suppose you need to fill the spinner from the string-array from the resource  and you want to keep selected the value from server  So  this is one way to set selected a value from server in the spinner   pincodeSpinner setSelection resources getStringArray R array pincodes  indexOf javaObject pincode     Hope it helps  P S  the code is in Kotlin

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you have to pass your custom adapter with position like REPEAT position   and it works properly

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If you set an XML array to the spinner in the XML layout you can do this  final Spinner hr   v findViewById R id chr   final String   hrs   getResources   getStringArray R array hours   if myvalue  null      for  int x   0 x lt  hrs length x           if myvalue equals hrs x              hr setSelection x

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I keep a separate ArrayList of all the items in my Spinners   This way I can do indexOf on the ArrayList and then use that value to set the selection in the Spinner

[java] How to set selected item of Spinner by value, not by position?

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