AlertDialog android

AlertDialog.Builder alrt  = new AlertDialog.Builder(getApplicationContext());

                    alrt.setMessage("Sila masukkan semua data lokasi");
                    alrt.setTitle("POI KVDSAZI");
                    alrt.setPositiveButton("Ok",
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                                    int which) {
                                    //dismiss the dialog
                                }
                            });
                    alrt.setCancelable(true);
                    alrt.create().show();