NestedScrollView could not scroll with match_parent height child : <p>I implement NonSwipeableViewPager with a fragment has NestedScrollView like this, what I expect is that the scrollview can scroll up and show 2 textviews:</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true"&gt;

    &lt;LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"&gt;

        &lt;RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"&gt;

            &lt;include
                android:id="@+id/header"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                layout="@layout/header" /&gt;

            &lt;ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_centerHorizontal="true"
                android:layout_marginBottom="16dp"
                android:src="@drawable/ic_up" /&gt;

        &lt;/RelativeLayout&gt;

        &lt;TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Text 1" /&gt;

        &lt;TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Text 2" /&gt;

    &lt;/LinearLayout&gt;

&lt;/android.support.v4.widget.NestedScrollView&gt;
</code></pre>

<p>But it could not scroll, I tried many ways but still did not get any solution</p>
