对话框形式的activity

<activity
android:name="com.irelint.stanleyagricultural.activity.PhotoActivity"
android:theme="@style/TANCStyle"
android:screenOrientation="portrait" />

<style name="TANCStyle" parent="@android:style/Theme.Dialog">
<item name="android:windowNoTitle">true</item>
<item name="android:background">#00000000</item>
<item name="android:windowIsTranslucent">true</item>
<!-- 更换背景图片实现全透明 -->
<!-- <item name="android:windowBackground">@drawable/panel_background_sodino1</item> -->
<!-- 屏幕背景变暗 -->
<item name="android:backgroundDimEnabled">true</item>
<!-- 更改对话框标题栏 -->
<!-- <item name="android:windowTitleStyle">@style/TitleStyle</item> -->
</style>