我怎样才能使背景50％透明？ 比方说，一个AbsoluteLayout的背景，以便它的黑暗，但你仍然可以透过它看到？

How can i make the background 50% transparent? Let's say the background of an AbsoluteLayout so it's dark but you can still see through it?

推荐答案

您可以应用透明主题所需要的活动。在/res/values​​/style.xml创建一个新的样式

You could apply a transparent theme to the required activity. Create a new style in /res/values/style.xml

<resources>
<style name="Transparent">
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowAnimationStyle">@android:style/Animation.Translucent</item>
<item name ="android:windowBackground">@color/transparent</item>
<item name="android:windowNoTitle">true</item>
<item name="android:colorForeground">#fff</item>
</style>
</resources>

透明的值为

<color name="transparent">#00000000</color>

现在在AndroidManifest.xml中声明该活动的主题，您刚才创建的。

Now in AndroidManifest.xml declare the theme of the activity to the one you just created.

<activity android:name="MyActivity" android:theme="@style/Transparent"></activity>