Translucent Activity filling the entire screen

I've read the other solutions, but here is my solution:

style.xml

<resources>
<style name="mytransparent.windowNoTitle" parent="android:Theme.Holo.Light">
    <item name="android:windowNoTitle">true</item>
    <item name="android:background">@android:color/transparent</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:colorBackgroundCacheHint">@null</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowAnimationStyle">@android:style/Animation</item>
</style>
<style name="mytransparent.windowTitle" parent="android:Theme.Holo.Light">
    <item name="android:background">@android:color/transparent</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:colorBackgroundCacheHint">@null</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowAnimationStyle">@android:style/Animation</item>
</style>

AndroidManifest.xml

<activity
    android:name=".LoginActivity"
    android:theme="@style/mytransparent.windowTitle"
    android:configChanges="orientation"
    android:label="@string/title_activity_login"
    android:screenOrientation="portrait" ></activity>

Finally, this theme worked to get a result like image number 4:

  <style name="Theme.CustomTranslucent" parent="android:style/Theme.Translucent">
        <item name="android:backgroundDimEnabled">true</item>
        <item name="android:backgroundDimAmount">0.5</item>
        <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
        <item name="android:background">@android:color/transparent</item>
 </style>  

In my activity 2 layout, I could eihter set android:background="@android:color/transparent" or not set any value at all to make it work.

Thanks to MikeIsrael and Veer for their help.