Android launchGoogleMaps
private void launchGoogleMaps(String name, String vicinity) {
Intent intent = new Intent(android.content.Intent.ACTION_VIEW,
Uri.parse("http://maps.google.com/maps?q="+name+","+vicinity));
intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity"); // this is the magic
startActivity(intent);
}