Is it possible to have a ViewPager inside of a ScrollView?

I'm trying to use a ViewPager inside of a ScrollView, but the ViewPager does not appear. If I remove the ScrollView the ViewPager appears fine.

I've created a simple test project with the following:

main.xml layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
    <ScrollView
        android:layout_width="fill_parent"
	    android:layout_height="fill_parent">

	    <android.support.v4.view.ViewPager
		    android:layout_width="fill_parent" 
		    android:layout_height="fill_parent"
		    android:id="@+id/viewpager" />

    </ScrollView>
</LinearLayout>

Activity class:

public class ScrollViewWithViewPagerActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        ViewPager vp = (ViewPager) findViewById(R.id.viewpager);
        vp.setAdapter(new MyPagerAdapter(this));
    }
}

class MyPagerAdapter extends PagerAdapter {

	private Context ctx;
	
	public MyPagerAdapter(Context context) {
		ctx = context;
	}

	@Override
	public int getCount() {
		return 2;
	}

	@Override
	public Object instantiateItem(View collection, int position) {
		
		TextView tv =  new TextView(ctx);
		tv.setTextSize(50);
		tv.setTextColor(Color.WHITE);
		tv.setText("SMILE DUDE, SMILE DUDE, SMILE DUDE, SMILE DUDE, SMILE DUDE, " +
				"SMILE DUDE, SMILE DUDE, SMILE DUDE, SMILE DUDE, SMILE DUDE, " +
				"SMILE DUDE, SMILE DUDE, SMILE DUDE, SMILE DUDE, SMILE DUDE, " +
				"SMILE DUDE, SMILE DUDE, SMILE DUDE");
        
        ((ViewPager) collection).addView(tv);
        
        return tv;

	}

	@Override
	public void destroyItem(View collection, int position, Object view) {
		 ((ViewPager) collection).removeView((View) view);
	}

	@Override
	public boolean isViewFromObject(View view, Object object) {
		return view == object;
	}

	@Override
	public Parcelable saveState() {
		return null;
	}

	@Override
	public void restoreState(Parcelable arg0, ClassLoader arg1) {
	}

	@Override
	public void startUpdate(View arg0) {
	}
	
	@Override
	public void finishUpdate(View arg0) {
	}
}

Thanks for your time.

I've figured it out;

I needed to add android:fillViewport="true" to the ScrollView element.

Yes it is possible to have viewpager inside scrollview.

Use below code and you will achieve your goal, i have done the same in my code as well.

 public class WrapContentHeightViewPager extends ViewPager {

 	public WrapContentHeightViewPager(Context context) {
 		super(context);
 	}

 	public WrapContentHeightViewPager(Context context, AttributeSet attrs) {
 		super(context, attrs);
 	}

 	@Override
 	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 		super.onMeasure(widthMeasureSpec, heightMeasureSpec);

 		int height = 0;
 		
 		for (int i = 0; i < getChildCount(); i++) {
 			View child = getChildAt(i);
 			
 			child.measure(widthMeasureSpec, View.MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));

 			int h = child.getMeasuredHeight();
 			
 			if (h > height) height = h;
 		}

 		heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);

 		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 	}
 }
 
 @Override
 public boolean onTouch(View v, MotionEvent event) {
 	int dragthreshold = 30;
 	
 	int downX = 0;
 	
 	int downY = 0;

 	switch (event.getAction()) {
 		case MotionEvent.ACTION_DOWN:
 			downX = (int) event.getRawX();
 			
 			downY = (int) event.getRawY();
 			
 			break;
 		
 		case MotionEvent.ACTION_MOVE:
 			int distanceX = Math.abs((int) event.getRawX() - downX);
 			
 			int distanceY = Math.abs((int) event.getRawY() - downY);

 			if (distanceY > distanceX && distanceY > dragthreshold) {
 				mViewPager.getParent().requestDisallowInterceptTouchEvent(false);
 				
 				mScrollView.getParent().requestDisallowInterceptTouchEvent(true);
 			} else if (distanceX > distanceY && distanceX > dragthreshold) {
 				mViewPager.getParent().requestDisallowInterceptTouchEvent(true);
 				
 				mScrollView.getParent().requestDisallowInterceptTouchEvent(false);
 			}
 			
 			break;
 		case MotionEvent.ACTION_UP:
 			mScrollView.getParent().requestDisallowInterceptTouchEvent(false);
 			
 			mViewPager.getParent().requestDisallowInterceptTouchEvent(false);
 			
 			break;
 	}
 
 	return false;
 }

Hope this aids someone in resolving scroll issues with nested ViewPager within a ScrollView.

This solution worked for me, with dynamic content.

http://www.henning.ms/2013/09/09/viewpager-that-simply-dont-measure-up/

In the xml ScrollView put android:fillViewport=true and android:layout_height=wrap_content

And in custom ViewPager too put android:layout_height=wrap_content

In case someone is having the same problem, when I use the class below it works fine.

class CustomWrapContentViewPager(cont: Context, attr: AttributeSet?) : ViewPager(cont,attr) {

override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec)
    var height = 0
    for (i in 0 until childCount) {
        val child: View = getChildAt(i)
        child.measure(
            widthMeasureSpec,
            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)
        )
        val h: Int = child.measuredHeight
        if (h > height) height = h
    }
    val heightMeasure = MeasureSpec.makeMeasureSpec(
        height,
        MeasureSpec.EXACTLY
    )
    super.onMeasure(widthMeasureSpec, heightMeasure)
    }
}