关于ConstraintLayout布局

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
<ScrollView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    tools:layout_editor_absoluteY="8dp"
    tools:layout_editor_absoluteX="8dp">
    <GridView
        android:id="@+id/gridview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:columnWidth="90dp"
        android:numColumns="3"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp"
        android:stretchMode="spacingWidth"
        android:gravity="center"
        />
</ScrollView>
</android.support.constraint.ConstraintLayout>

public class ExampleActivity extends Activity {
    private GridView gridView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example1);
        gridView= (GridView) findViewById(R.id.gridview);
        List<String> strList=new ArrayList<String>();
        for(int i=0;i<3;i++)
        {
            strList.add("慕课网"+i);
        }
        ArrayAdapter<String>arrayAdapter=new ArrayAdapter<String>(this,R.layout.item_gridview1,strList);
        gridView.setAdapter(arrayAdapter);
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast.makeText(ExampleActivity.this,position+"",Toast.LENGTH_SHORT).show();
            }
        } );
    }
}

上面是这个界面的布局和java代码，下面是运行的效果。内部控件用的是GridView。

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <ScrollView
       android:layout_width="match_parent"
       android:layout_height="match_parent">

    <!--布局实现-->

   </ScrollView>
</android.support.constraint.ConstraintLayout>

如果像这样使用ScrollView，内部控件就会失效。如果把ScrollView套在ConstraintLayout外部，ConstraintLayout就会失效。所以应该如何摆放这个ScrollView呢