How to create alrt box seprate from all activity

 public static void AlertDialogBox(Context context, String title,String message)

{
     AlertDialog.Builder builder=new AlertDialog.Builder(context);
                 builder.setCancelable(true);
                 builder.setTitle(title);
                 builder.setMessage(message);
                 builder.setIcon(R.mipmap.ic_launcher_round);
                 builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                     @Override
                     public void onClick(DialogInterface dialogInterface, int i) {
                         dialogInterface.dismiss();
                     }
                 });
                 builder.show();
}