Activity로 Dialog Popup 만들기

public class cGameStartPopup extends Activity
{
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        WindowManager.LayoutParams  layoutParams = new WindowManager.LayoutParams();
        layoutParams.flags  = WindowManager.LayoutParams.FLAG_DIM_BEHIND;
        layoutParams.dimAmount  = 0.7f;
        getWindow().setAttributes(layoutParams);
        setContentView(R.layout.activity_game_start_popup);
        getWindow().getAttributes().width   = (int)(cGameManager.getInstance().getDisplayMetrics().widthPixels * 0.9);
        getWindow().getAttributes().height  = (int)(cGameManager.getInstance().getDisplayMetrics().heightPixels * 0.4);
    }
}

7 : 타이틀 바 제거.

8 ~ 11 : 팝업창이 뜨면 뒷배경을 블러처리 해준다.

13~14 : 팝업창이 모바일 디스플레이에 맞게 크기를 재설정 한다.

Activity Layout 생성.

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center">
 
    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/imageView"
        android:background="@drawable/game_start_popup" />
</RelativeLayout>

AndroidMenifest에 Activity 등록

<!-- 게임스타트 팝업 엑티비티 -->
<activity
    android:name=".Popup.cGameStartPopup"
    android:theme="@android:style/Theme.Dialog"
    android:screenOrientation="portrait">
</activity>

Main Activity에서 Popup Activity 실행 방법

startActivity(new Intent(this, cGameStartPopup.class));