How can I use onItemSelected in Android

Question

package org example mbtiapplication   import android os Bundle  import android app Activity  import android view Menu  import android view View  import android widget AdapterView  import android widget AdapterView OnItemClickListener  import android widget AdapterView OnItemSelectedListener  import android widget ArrayAdapter  import android widget Spinner   public class MBTITest extends Activity implements OnItemSelectedListener         private Spinner firstSpinner        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity mbtitest            Spinner firstSpinner    Spinner  findViewById R id spinner1              Create an ArrayAdapter using the string array and a default spinner layout         ArrayAdapter lt CharSequence gt  adapter   ArrayAdapter createFromResource this                  R array spinnerarraybool  android R layout simple spinner item              Specify the layout to use when the list of choices appears         adapter setDropDownViewResource android R layout simple spinner dropdown item              Apply the adapter to the spinner         firstSpinner setAdapter adapter               Override     public void onItemSelected AdapterView lt   gt  parent  View v  int position              long id               TODO Auto-generated method stub              Override     public void onNothingSelected AdapterView lt   gt  arg0               TODO Auto-generated method stub                  XML Layout    lt TableLayout xmlns android  http   schemas android com apk res android      android layout width  fill parent      android layout height  fill parent   gt        lt TableRow         android layout width  match parent          android layout height  wrap content   gt            lt TextView             android layout width  120dp              android layout height  match parent              android layout marginLeft  5dp              android gravity  center vertical              android text  I like to go out more than staying home     gt            lt Spinner             android id    id spinner1              android layout width  wrap content              android layout height  wrap content    gt       lt  TableRow gt        lt TableRow         android layout width  match parent          android layout height  wrap content   gt            lt TextView             android layout width  120dp              android layout height  match parent              android layout marginLeft  5dp              android gravity  center vertical              android textSize  10 5dp              android text  Sensing v Intuition    gt            lt Spinner             android id    id spinner2              android layout width  match parent              android layout height  wrap content    gt       lt  TableRow gt   lt  TableLayout gt    I m a new Android programmer and having trouble with using Spinner  i ve tried multiple tutorials and still am confused   I d like to know what my next step is here  as far as I know I have set up my spinner in XML  in Java I have identified that spinner  created an ArrayAdapter for said spinner  and specified some options   I m not to sure if I have populated the spinner yet or how to manuever with the spinner object   I d like to be able to use the spinner object to select one of three options and then keep that value inside of the textview inside of the spinner

User · Answer

spinner1 setOnItemSelectedListener new AdapterView OnItemSelectedListener                  Override             public void onItemSelected AdapterView lt   gt  parent  View view  int position  long id                      check if spinner2 has a selected item and show the value in edittext                              Override             public void onNothingSelected AdapterView lt   gt  parent                       sometimes you need nothing here                            spinner2 setOnItemSelectedListener new AdapterView OnItemSelectedListener                  Override             public void onItemSelected AdapterView lt   gt  parent  View view  int position  long id                      check if spinner1 has a selected item and show the value in edittext                               Override             public void onNothingSelected AdapterView lt   gt  parent                       sometimes you need nothing here

User · Answer

You re almost there  As you can see  the onItemSelected will give you a position parameter  you can use this to retrieve the object from your adapter  as in getItemAtPosition position    Example   spinner setOnItemSelectedListener this         public void onItemSelected AdapterView lt   gt  parent  View view  int pos long id        Toast makeText parent getContext              OnItemSelectedListener       parent getItemAtPosition pos  toString            Toast LENGTH SHORT  show        This will put a message on screen  with the selected item printed by its toString   method

User · Answer

I think this will benefit you Try this I m using to change the language in my application  String   districts  Spinner sp             sp    Spinner  findViewById R id sp            districts   getResources   getStringArray R array lang array            ArrayAdapter lt String gt  adapter   new ArrayAdapter lt String gt  this  android R layout simple spinner item districts            sp setAdapter adapter            sp setOnItemSelectedListener new AdapterView OnItemSelectedListener                    Override              public void onItemSelected AdapterView lt   gt  arg0  View arg1  int position  long arg3                         TODO Auto-generated method stub                   int index   arg0 getSelectedItemPosition                      Toast makeText getBaseContext     You select   districts index    id   position  Toast LENGTH LONG  show                      switch position                         case 0                            setLocal  fr                                recreate                              break                        case 1                            setLocal  ar                                recreate                              break                        case 2                            setLocal  en                                recreate                              break                        default    For all other cases  do this                           setLocal  en                                recreate                              break                                                    Override             public void onNothingSelected AdapterView lt   gt  arg0                          TODO Auto-generated method stub                                          and this is my String Array   lt string-array name  lang array  gt       lt item gt french lt  item gt       lt item gt arabic lt  item gt       lt item gt english lt  item gt   lt  string-array gt

User · Answer

Another thing  When you have more than one spinner in your layout  you have to implement a switch selection in the onItemSlected   method to know which widget was clicked  Something like this    Override public void onItemSelected AdapterView lt   gt  parent  View view  int position  long id        switch  parent getId             case R id sp alarmSelection                Do something             Toast makeText this   Alarm Selected      parent getSelectedItem   toString    Toast LENGTH SHORT  show                break          case R id sp optionSelection                Do another thing              Toast makeText this   Option Selected      parent getSelectedItem   toString    Toast LENGTH SHORT  show                break

User · Answer

Joseph   spinner setOnItemSelectedListener this  should be below  Spinner firstSpinner    Spinner  findViewById R id spinner1   on onCreate

User · Answer

If you don t want to implement the listener  you can set it up like this directly where you want it  call on your spinner after your adapter has been set    spinner setOnItemSelectedListener new AdapterView OnItemSelectedListener                  Override             public void onItemSelected AdapterView lt   gt  parent  View view  int position  long id                     switch  position                        case 0                          Toast makeText parent getContext     Spinner item 1    Toast LENGTH SHORT  show                            break                      case 1                          Toast makeText parent getContext     Spinner item 2    Toast LENGTH SHORT  show                            break                      case 2                          Toast makeText parent getContext     Spinner item 3    Toast LENGTH SHORT  show                            break                                                Override             public void onNothingSelected AdapterView lt   gt  parent                       sometimes you need nothing here

User · Answer

For Kotlin and bindings the code is   binding spinner onItemSelectedListener   object   AdapterView OnItemSelectedListener              override fun onNothingSelected parent  AdapterView lt   gt                                 override fun onItemSelected parent  AdapterView lt   gt    view  View   position  Int  id  Long

[android] How can I use onItemSelected in Android?

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