Why does Intent.createChooser() need a BroadcastReceiver and how to implement?

Question

The following snippet, called from my implementation of onOptionsItemSelected(), works nicely to carry the user from my app to a mail client with email address,

Answer 1

Simple resolution of problem.

More info here: https://developer.android.com/training/basics/intents/sending.html

Uri location = Uri.parse("geo:0,0?q=1600+Amphitheatre+Parkway,+Mountain+View,+California");
Intent mapIntent = new Intent(Intent.ACTION_VIEW, location);

PackageManager pkManager = getPackageManager();
List activities = pkManager.queryIntentActivities(mapIntent, 0);

if (activities.size() > 1) {
    // Create and start the chooser
    Intent chooser = Intent.createChooser(mapIntent, "Open with");
    startActivity(chooser);

  } else {
    startActivity( mapIntent );
}