我的Scrollview没有使用LinearLayout android滚动(My Scrollview is not scrolling with a LinearLayout android)

 我的Scrollview没有使用LinearLayout android滚动 
 
 知道为什么吗？ 如果是这样请回复，我最近开始使用android所以它可能是非常简单的事情。 但我搜索并无法解决它。 帮助将很高兴。 
 
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:nestedScrollingEnabled="true">

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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:id="@+id/textView"
        android:layout_gravity="center_horizontal"
        android:paddingBottom="80dp"/>

    <android.support.v7.widget.CardView
        android:layout_width="375dp"
        android:layout_height="300dp"
        android:layout_gravity="center_horizontal"
        app:cardCornerRadius="0dp"
        app:cardElevation="3dp"
        app:cardBackgroundColor="#161616">

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

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/image"/>

        </RelativeLayout>

    </android.support.v7.widget.CardView>

</LinearLayout>

</ScrollView>

My Scrollview is not scrolling with a LinearLayout android
 
any idea why? if so please respond, I recently started on android so it might be really easy thing. But i searched and couldn't fix it. help would be gladly appreciated. 
 
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:nestedScrollingEnabled="true">

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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:id="@+id/textView"
        android:layout_gravity="center_horizontal"
        android:paddingBottom="80dp"/>

    <android.support.v7.widget.CardView
        android:layout_width="375dp"
        android:layout_height="300dp"
        android:layout_gravity="center_horizontal"
        app:cardCornerRadius="0dp"
        app:cardElevation="3dp"
        app:cardBackgroundColor="#161616">

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

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/image"/>

        </RelativeLayout>

    </android.support.v7.widget.CardView>

</LinearLayout>

</ScrollView>

原文：https://stackoverflow.com/questions/35659666