scroll height with online image

activity_what.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="wrap_content"  tools:context="akou.open.WhatActivity"
    android:background="#d6d6d6">
    <ScrollView
        android:layout_width="match_parent"
        android:id="@+id/scrollView1"
        android:layout_height="wrap_content"
        android:scrollbarAlwaysDrawVerticalTrack="true">
        <LinearLayout
            android:id="@+id/linearLayout1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal"
            android:orientation="vertical">

            <ImageView
                android:id="@+id/imageView2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:scaleType="fitStart"
                android:adjustViewBounds="true"/>
        </LinearLayout>
    </ScrollView>
</RelativeLayout>