i have a little problem with ScrollView in android

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XML

Mobile

Android

Android4x

hi.
i am using ScrollView to design my User interface for an android application .
i have used "fill_parent" parameter for the both height and width , and it covers the device's screen complitly and also i have put a LinearLayout inside the ScrollView .its height and width are "100dp" . but unfortunately it doesn't show the LinearLayout .

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/SV"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:removed="@color/bcfbc8"    
    android:orientation="vertical">
     

    <LinearLayout
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:removed="@color/Black"
        android:orientation="vertical"
        android:id="@+id/ll">     
    </LinearLayout>

</ScrollView >

please help me with your useful idea . thanks in advance