Android自定义对话框背景 [英] android custom dialog background
问题描述
我需要在我的Android应用程序中显示一个自定义对话框.标准的AlertDialog
设计是不可接受的. Android文档说:
I need to show a custom dialog in my Android application. Standard AlertDialog
design is unacceptable. Android docs say:
提示:如果要自定义对话框,则可以显示一个活动" 作为对话框而不是使用Dialog API.只需创建一个 活动并将其主题设置为 清单元素:
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:
就是这样.该活动现在显示在对话框窗口中,而不是 全屏.
That's it. The activity now displays in a dialog window instead of fullscreen.
听起来很有希望.我做到了,但是透明度不起作用!背景始终为灰色:
Sounded promising. I did it, but transparency does not work! Background is always grey:
清单上有一个desc:
Here is a desc in the manifest:
<activity
android:name=".MyDialogActivity"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.Holo.Dialog.NoActionBar" >
</activity>
这是我活动的根源:
<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>
我也尝试过android:background="@null"
-效果是一样的.
如果我使用android:background="#ff0000"
,那么它是红色的(应该是红色的).但是如何使其透明?
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?
更新
我最终以
<style name="MyThemeDialogCustom" parent="android:Theme.Holo.Dialog.NoActionBar" >
<item name="android:windowBackground">@color/transparent</item>
<item name="android:colorBackgroundCacheHint">@null</item>
</style>
推荐答案
将主题设置为
<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>
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