为什么这些 dp 单位在同一个布局中渲染的厚度是原来的两倍？

Question

Below I have some xml to generate a scale-able fork for generating ranking ladders. This xml is used several times in the same layout. However, the dp lines scaled with the screen height seem to randomly vary in actual pixel height when used.

Why is this? Why would a 1dp height unit on the same screen return both 1 and 2px on the same device?

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="50dp">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="50dp"
        android:orientation="horizontal">

        <View
            android:layout_width="8dp"
            android:layout_height="1dp"
            android:background="#e7000000"
            android:layout_gravity="center_vertical"/>

        <View
            android:layout_width="1dp"
            android:layout_height="30dp"
            android:background="#e7000000"
            android:layout_gravity="center_vertical"/>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="50dp"
            android:orientation="vertical">

            <View
                android:layout_width="8dp"
                android:layout_height="1dp"
                android:background="#e7000000"
                android:layout_marginTop="10dp"/>

            <View
                android:layout_width="8dp"
                android:layout_height="1dp"
                android:background="#e7000000"
                android:layout_marginTop="28dp"/>
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

Answer 1

It's a rendering bug with the Android Emulator. No issues were found on physical devices.