安卓 : Set scroll view position to start at 80% from top of screen

Question

我正在努力实现这样的目标:

 -  |-------------------|<-------Phone screen
 |  ||-----------------||
 |  ||                 ||
80% ||                 ||
 |  ||                 ||
 |  ||                 |<--------Image View  (fills screen, background)
 -  |||---------------|||
 |  |||               |||
20% |||               |<---------Scroll View (starts after 80% of parent view)
 |  ||-----------------||
 -  |-------------------|  

ImageView 有一个填充背景的图像，scrollView 在 80% 高度后开始。有人可以帮助我了解如何针对所有设备尺寸实现这一目标吗？

Answer 1

使用layout_weight

<RelativeLayout 
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

<LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <View
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="8" />

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="2">

        </ScrollView>

</LinearLayout>

</RelativeLayout>