E.g.
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setView(someView);
AlertDialog dialog = builder.create();
dialog.show();
... then later ...
dialog.setView(someOtherView);
Code executes with no error, but view is not replaced in the dialog. Am I doing it wrong or is this not possible?
No this is not possible. Try to dismiss the alert box and set your view and show it again.