다이얼로그로 띄우지 마시고
엑티비티를 띄우시면 됩니다. theme을 다이얼로그로 주시고요
<activity
android:name=".mapDialog"
android:screenOrientation="portrait"
android:theme="@style/Dialog" >
</activity>
themes.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="Dialog" parent="android:style/Theme.Dialog">
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsFloating">true</item>
</style>
</resources>