how to write single dialogue for all activities in android

public static void getAlertDialog(String title, String message, Context ctx) {
AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
builder.setTitle(title);
builder.setMessage(message).setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.dismiss();
return;
}
});
builder.create();
builder.show();
}