new MyDialog(GameActivity.this, R.style.dialog);

<?xml version="1.0″ encoding=" utf-8″?>
<resources>
  <style name="dialog" parent="@android:style/Theme.Dialog">
    <item name="android:windowFrame">@null</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowIsTranslucent">false</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowBackground">@drawable/filled_box</item>
    <item name="android:backgroundDimEnabled">false</item>
    <item name="android:backgroundDimAmount">0.6</item>
  </style>
</resources>

<?xml version="1.0″ encoding="utf-8″?>
<shape
  xmlns:android="http://schemas.android.com/apk/res/android">
  <solid android:color="#9000″/>
  <stroke android:width="3dp" color="#ffff8080″/>
  <corners android:radius="30dp" />
  <padding android:left="10dp" android:top="10dp" android:right="10dp" android:bottom="10dp" />
</shape>