android custom dialog background
android, android-dialog
Solution
make theme like this
<style name="ThemeDialogCustom">
<item name="android:windowFrame">@null</item>
<item name="android:windowIsFloating">true</item>
<item name="android:windowContentOverlay">@null</item>
<item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
<item name="android:windowBackground">@color/transparent</item>
<item name="android:colorBackgroundCacheHint">@null</item>
</style>
Problem
I need to show a custom dialog in my Android application. Standard `AlertDialog` design is unacceptable. Android docs say: Tip: If you want a custom dialog, you can instead display an Activity as a dialog instead of using the Dialog APIs. Simply create an activity and set its theme to Theme.Holo.Dialog in the manifest element: That's it. The activity now displays in a dialog window instead of fullscreen. Sounded promising. I did it, but transparency does not work! Background is always grey: Here is a desc in the manifest: ``` <activity android:name=".MyDialogActivity" android:screenOrientation="portrait" android:theme="@android:style/Theme.Holo.Dialog.NoActionBar" > </activity> ``` Here is a root of my activity: ``` <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:background="#00000000" android:layout_width="400dp" android:layout_height="wrap_content" > // Content ... // </RelativeLayout> ``` I tried also `android:background="@null"` - effect was the same. If I use `android:background="#ff0000"` then it's red (as it should be). But how do I make it transparent? Update I ended up with ``` <style name="MyThemeDialogCustom" parent="android:Theme.Holo.Dialog.NoActionBar" > <item name="android:windowBackground">@color/transparent</item> <item name="android:colorBackgroundCacheHint">@null</item> </style> ```