Working With Spinners

Android-Spinner.java

// A Spinner provides a drop-down menu:

// Add a Spinner to the layout. Use an ArrayAdapter to assign an array of text values as the Spinner menu items.
// Implement the AdapterView.OnItemSelectedListener interface, which requires also adding the onItemSelected() and 
// onNothingSelected() callback methods to activate the Spinner and its listener. 
// Use the onItemSelected() callback method to retrieve the selected item in the Spinner menu using getItemAtPosition().        

final ArrayAdapter adapter = ArrayAdapter.createFromResource(this, R.array.spinner_values, android.R.layout.simple_spinner_dropdown_item);
        final Spinner spinner = findViewById(R.id.spinner);
        if (spinner != null) {
            spinner.setAdapter(adapter);
        }

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected (AdapterView<?> parent, View view, int position, long id) {
                Log.d(TAG, "onItemClick: " + parent.getItemAtPosition(position).toString());
            }

            @Override
            public void onNothingSelected (AdapterView<?> parent) {
                Log.d(TAG, "onNothingSelected: nothing Selected");

            }
        });