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:

spinn         


        

Answer 1

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 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 parent) {
               // Maybe useful.   
               // initialValue = null; 
        }
    }

Objects are your friend, use them.