@@ -0,0 +1,832 @@
+package fjn.vn.fjnlivestream.utils;%0A%0Aimport android.support.annotation.NonNull;%0Aimport android.support.v4.app.Fragment;%0Aimport android.support.v4.app.FragmentManager;%0Aimport android.support.v4.app.FragmentTransaction;%0A%0Aimport fjn.vn.fjnlivestream.R;%0A%0Apublic class UI %7B%0A    public static void show_Screen (@NonNull FragmentManager fragmentManager,%0A                                           @NonNull Fragment fragment) %7B%0A%0A        FragmentTransaction transaction = fragmentManager.beginTransaction();%0A        transaction.add(R.id.cFrame, fragment);%0A        transaction.commit();%0A    %7D%0A%0A    public static void switch_Screen(Fragment current, Fragment next)%7B%0A        FragmentTransaction transaction = current.getFragmentManager().beginTransaction();%0A        transaction.replace(R.id.cFrame, next);%0A        transaction.commit();%0A    %7D%0A%7D%0A

Create UI.java