高度一半 fill_parent xml

我该怎么做LinearLayout身高一半fill_parent in xml?

<LinearLayout android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:weightSum="1">
      <ImageView android:layout_height="fill_parent"
                 android:layout_width="0dp"
                 android:layout_weight="0.5"/>
</LinearLayout>

我想做一些与身高类似的事情。

I just want have a half of screen with 1 linearLayout and half screen with other one

Try this

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:weightSum="2"
    android:orientation="vertical" >

    <LinearLayout android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:background="#192832"></LinearLayout>

    <LinearLayout android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:background="#193222"></LinearLayout>


</LinearLayout>

两种线性布局各占屏幕的一半。