Update spinner items based on the selected item of another spinner

I am trying to update a spinner by a selected item from another spinner. The following code block describes how I did it.

I could successfully update the spinner3 using the if statement inside onItemSelected() method. But my problem is that it seems that a loop just keeps running which automatically selects value "5" from spinner2 (so the Toast just keeps spitting out "You've chosen 5").

When the activity is loaded, the Toast will display each selection from all three spinners. Does it mean that the first selection for each spinner is done when an adapter is set to a spinner?

And does binding adapter3 to spinner3 (in the if statement) trigger a new selection of spinner2?

Thanks in advance!

public class WheelchairHelperMain extends Activity{

Spinner spinner2;
Spinner spinner3;
ArrayAdapter<CharSequence> adapter3 ;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.wheelchair_helper_main);

    Spinner spinner1 = (Spinner)findViewById(R.id.spinner1);
    ArrayAdapter<CharSequence> adapter1 = ArrayAdapter.createFromResource(this, R.array.destinations_list, android.R.layout.simple_spinner_item);
    adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner1.setAdapter(adapter1);
    spinner1.setOnItemSelectedListener(new MyOnItemSelectedListener());

    spinner2 = (Spinner)findViewById(R.id.spinner2);
    ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(this,R.array.departure_timeH_list,android.R.layout.simple_spinner_item);
    adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner2.setAdapter(adapter2);
    spinner2.setOnItemSelectedListener(new MyOnItemSelectedListener());

    spinner3 = (Spinner)findViewById(R.id.spinner3);
    spinner3.setOnItemSelectedListener(new MyOnItemSelectedListener());



}

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