Android Spinner Get the selected item change event

Question

How can you set the event listener for a Spinner when the selected item changes   Basically what I am trying to do is something similar to this   spinner1 onSelectionChange   handleSelectionChange   void handleSelectionChange Object sender         handle event

User · Answer

spinner setOnItemSelectedListener              new AdapterView OnItemSelectedListener                       Override                 public void onItemSelected AdapterView lt   gt  arg0  View arg1                          int arg2  long arg3                            TODO Auto-generated method stub                                     Override                 public void onNothingSelected AdapterView lt   gt  arg0                           TODO Auto-generated method stub                                      add some code here

User · Answer

For kotlin you can use  spinner onItemSelectedListener    object   AdapterView OnItemSelectedListener       override fun onItemSelected parent  AdapterView lt   gt    view  View   position  Int  id  Long                        override fun onNothingSelected p0  AdapterView lt   gt                        Note  for parameters of onItemSelected method I use custom variable names

User · Answer

The best way what I think would be to have an flagitemselected   0  in onCreate    And on item selected event increment that flag i e flagitemselected    and then check   if flagitemselected  1       do your work here     This will help I guess

User · Answer

It doesn t matter will you set OnItemSelectedListener in onCreate or onStart - it will still be called during of Activity creation or start  respectively   So we can set it in onCreate  and NOT in onStart    Just add a flag to figure out first initialisation   private Spinner mSpinner  private boolean mSpinnerInitialized    then in onCreate  or onCreateView  just   mSpinner setOnItemSelectedListener new AdapterView OnItemSelectedListener                 public void onItemSelected AdapterView lt   gt  adapterView  View view  int i  long l                    if   mSpinnerInitialized                        mSpinnerInitialized   true                      return                                        do stuff                            public void onNothingSelected AdapterView lt   gt  adapterView                    return

User · Answer

Find your spinner name and find id then implement this method   spinnername setOnItemSelectedListener new OnItemSelectedListener           Override     public void onItemSelected AdapterView lt   gt  parentView  View selectedItemView  int position  long id               your code here             Override     public void onNothingSelected AdapterView lt   gt  parentView               your code here

User · Answer

One trick I found was putting your setOnItemSelectedListeners in onWindowFocusChanged instead of onCreate  I haven t found any bad side-effects to doing it this way  yet  Basically  set up the listeners after the window gets drawn  I m not sure how often onWindowFocusChanged runs  but it s easy enough to create yourself a lock variable if you are finding it running too often   I think Android might be using a message-based processing system  and if you put it all in onCreate  you may run into situations where the spinner gets populated after it gets drawn  So  your listener will fire off after you set the item location  This is an educated guess  of course  but feel free to correct me on this

User · Answer

Some of the previous answers are not correct  They work for other widgets and views  but the documentation for the Spinner widget clearly states       A spinner does not support item click   events  Calling this method will raise   an exception    Better use OnItemSelectedListener   instead   spinner setOnItemSelectedListener new OnItemSelectedListener          Override     public void onItemSelected AdapterView lt   gt  parentView  View selectedItemView  int position  long id               your code here             Override     public void onNothingSelected AdapterView lt   gt  parentView               your code here              This works for me   Note that onItemSelected method is also invoked when the view is being build  so you can consider putting it inside onCreate   method call

User · Answer

I know this was long solved but I have a  quot Please select quot  string at the top of my string arrays  Then when you write the listener yourspinner onItemSelectedListener   object   OnItemSelectedListener               override fun onItemSelected adapterView  AdapterView lt   gt    view  View  i  Int  l  Long                    yourvalue   yourspinner getSelectedItem   toString                    when yourvalue                        quot Please Select quot  - gt     DO nothing                     else - gt     Do something                                              override fun onNothingSelected adapterView  AdapterView lt   gt                      return                          You can of course extend the when statement to have different responses or actions

User · Answer

take a global variable for current selection of spinner   int currentItem   0   spinner counter    Spinner findViewById R id spinner counter   String   value   20   40   60   80   100   All    aa new ArrayAdapter lt String gt  this R layout spinner item profile value   aa setDropDownViewResource android R layout simple spinner dropdown item   spinner counter setAdapter aa    spinner counter setOnItemSelectedListener new AdapterView OnItemSelectedListener              Override         public void onItemSelected AdapterView lt   gt  parent  View view  int position  long id                if currentItem    position                   return    do nothing                           else                                TextView spinner item text    TextView  view                     write your code here                           currentItem   position                      Override         public void onNothingSelected AdapterView lt   gt  parent                          R layout spinner item profile  lt  xml version  1 0  encoding  utf-8   gt    lt TextView  android id    id spinner item text  xmlns android  http   schemas android com apk res android  android layout width  match parent   android layout height  wrap content  android background   drawable border close profile  android gravity  start    android textColor   color black           android paddingLeft  5dip  android paddingStart  5dip  android paddingTop  12dip  android paddingBottom  12dip    gt     drawable border close profile  lt  xml version  1 0  encoding  utf-8   gt   lt layer-list xmlns android  http   schemas android com apk res android  gt     lt item gt      lt shape android shape  rectangle  gt       lt solid android color   e2e3d7    gt      lt  shape gt    lt  item gt   lt item android left  1dp  android right  1dp  android top  1dp  android bottom  1dp  gt   lt shape android shape  rectangle  gt       lt solid android color   color white text    gt   lt  shape gt   lt  item gt   lt  layer-list gt

User · Answer

You can implement AdapterView OnItemSelectedListener class in your Activity   And then use the below line within onCreate    Spinner spin    Spinner  findViewById R id spinner   spin setOnItemSelectedListener this     Then override these two methods   public void onItemSelected AdapterView lt   gt  parent  View v  int position  long id        selection setText items position       public void onNothingSelected AdapterView lt   gt  parent        selection setText

User · Answer

Spinner spnLocale    Spinner findViewById R id spnLocale    spnLocale setOnItemSelectedListener new AdapterView OnItemSelectedListener         public void onItemSelected AdapterView lt   gt  adapterView  View view  int i  long l                Your code here             public void onNothingSelected AdapterView lt   gt  adapterView            return                Note  Remember one thing    Spinner OnItemSelectedListener event will execute twice    Spinner initialization  User selected manually   Try to differentiate those two by using flag variable

User · Answer

The docs for the spinner-widget says     A spinner does not support item click events    You should use setOnItemSelectedListener to handle your problem

User · Answer

https   stackoverflow com q 1714426 811625  You can avoid the OnItemSelectedListener   being called with a simple check  Store the current selection index in an integer variable and check within the onItemSelected     before doing anything   E g   Spinner spnLocale   spnLocale    Spinner findViewById R id spnLocale    int iCurrentSelection   spnLocale getSelectedItemPosition     spnLocale setOnItemSelectedListener new AdapterView OnItemSelectedListener         public void onItemSelected AdapterView lt   gt  adapterView  View view  int i  long l         if  iCurrentSelection    i                  Your code here           iCurrentSelection   i              public void onNothingSelected AdapterView lt   gt  adapterView            return                Of cause the iCurrentSelection should be in object scope for this to work

User · Answer

spinner1 setOnItemSelectedListener      new AdapterView OnItemSelectedListener               add some code here

User · Answer

By default  you will get the first item of the spinner array through  value   spinner getSelectedItem   toString      whenever you selected the value in the spinner this will give you the selected value  if you want the position of the selected item then do it like that  pos   spinner getSelectedItemPosition      the above two answers are for without applying listener

User · Answer

This will work intialize the spinner and findviewbyid and use this it will work       Spinner schemeStatusSpinner     schemeStatusSpinner    Spinner  dialog findViewById R id spinner    schemeStatusSpinner setOnItemSelectedListener new AdapterView OnItemSelectedListener              Override         public void onItemSelected AdapterView lt   gt  parentView  View selectedItemView  int position  long id                   your code here             if schemeStatusSpinner getSelectedItemId    4                   reasonll setVisibility View VISIBLE                             else                   reasonll setVisibility View GONE                                     Override         public void onNothingSelected AdapterView lt   gt  parentView                   your code here

User · Answer

If you want a true onChangedListener     Store the initial value in the handler and check to see if it has changed   It is simple and does not require a global variable   Works if you have more than one spinner on the page   String initialValue      get from Database or your object mySpinner setOnItemSelectedListener new SpinnerSelectedListener initialValue           protected class SpinnerSelectedListener implements AdapterView OnItemSelectedListener            private SpinnerSelectedListener                 super                       public SpinnerSelectedListener String initialValue                this                this initialValue   initialValue                     private String initialValue              getter and setter removed              Override         public void onItemSelected AdapterView lt   gt  parent  View view  int position  long id                final String newValue    String  spinHeight getItemAtPosition position               if  newValue equals initialValue     false                      Add your code here   The spinner has changed value                      Maybe useful                       initialValue   newValue                                     Override         public void onNothingSelected AdapterView lt   gt  parent                      Maybe useful                       initialValue   null                     Objects are your friend   use them

[android] Android Spinner: Get the selected item change event

Examples related to android

Examples related to events

Examples related to spinner

Examples related to android-spinner