如何制作透明渐变?
我有以下渐变: <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <gradient android:startColor="#ECECEC" android:centerColor="#F6F6F4" android:endColor="#F8F8F6" android:angle="90" android:dither="true" /> </shape> 我希望它是透明的,因为在ListView中,我将其设置为ListSelector: <ListView android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/ARListView" android:background="@drawable/transparent_background" android:cacheColorHint="#00000000" android:drawSelectorOnTop="true" android:listSelector="@drawable/stocks_selected_gradient"> </ListView>