I want to check first if spinner has null values based on the following:
String Name= spinnerName.getSelectedItem().toString();
if(Name != null) {
} els
you can define a spinner for departure and destination like you did there, then inside a button onClickListener you can check for the value before starting a new activity for example:
if(spinner1.getSelectedItem.toString.equalIgnoreCase(value) && spinner2.getSelectedItem.toString.equalIgnoreCase(value)) {
Intent mIntent = new Intent(MainActivity.this, DetailActivity.class) startActivity(mIntent);
}else{
//Show Toast here