Dialog 팝업창 표시하기

private void showAccountExist(Context context) {
    final Dialog dialog = new Dialog(context);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
    dialog.setContentView(R.layout.dialog_messagebox_common_1button);
    dialog.setCancelable(false);
    WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();
    lp.dimAmount=0.85f; // Dim level. 0.0 - no dim, 1.0 - completely opaque
    dialog.getWindow().setAttributes(lp);

    TextView tvTitle = (TextView)dialog.findViewById(R.id.tvTitle);
    TextView tvGuide = (TextView)dialog.findViewById(R.id.tvGuide);

    tvTitle.setText("알림");
    tvGuide.setText("ID를 생성하셨습니다.");

    Button btn1 = (Button) dialog.findViewById(R.id.btn1);
    btn1.setText("닫기");

    btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            dialog.dismiss();
        }
    });

    dialog.show();
}