Google Maps API v2 SupportMapFragment inside ScrollView - users cannot scroll the map vertically

Apply a transparent image over the mapview fragment.

<RelativeLayout
    android:id="@+id/map_layout"
    android:layout_width="match_parent"
    android:layout_height="300dp">

    <fragment
        android:id="@+id/mapview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="-100dp"
        android:layout_marginBottom="-100dp"
        android:name="com.google.android.gms.maps.MapFragment"/>

    <ImageView
        android:id="@+id/transparent_image"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@color/transparent" />

</RelativeLayout>   

Then set requestDisallowInterceptTouchEvent(true) for the main ScrollView. When the user touches the transparent image and moves disable the touch on the transparent image for MotionEvent.ACTION_DOWN and MotionEvent.ACTION_MOVE so that map fragment can take Touch Events.

ScrollView mainScrollView = (ScrollView) findViewById(R.id.main_scrollview);
ImageView transparentImageView = (ImageView) findViewById(R.id.transparent_image);

transparentImageView.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        int action = event.getAction();
        switch (action) {
           case MotionEvent.ACTION_DOWN:
                // Disallow ScrollView to intercept touch events.
                mainScrollView.requestDisallowInterceptTouchEvent(true);
                // Disable touch on transparent view
                return false;

           case MotionEvent.ACTION_UP:
                // Allow ScrollView to intercept touch events.
                mainScrollView.requestDisallowInterceptTouchEvent(false);
                return true;

           case MotionEvent.ACTION_MOVE:
                mainScrollView.requestDisallowInterceptTouchEvent(true);
                return false;

           default: 
                return true;
        }   
    }
});

This worked for me. Hope it helps you..

I encountered a similar problem and came up with a more general working solution based on In-Ho Yi and Данаил Димитров answers above.

public class CustomScrollView extends ScrollView {

    List<View> mInterceptScrollViews = new ArrayList<View>();

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

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

    public CustomScrollView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public void addInterceptScrollView(View view) {
        mInterceptScrollViews.add(view);
    }

    public void removeInterceptScrollView(View view) {
        mInterceptScrollViews.remove(view);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {

        // check if we have any views that should use their own scrolling
        if (mInterceptScrollViews.size() > 0) {
            int x = (int) event.getX();
            int y = (int) event.getY();
            Rect bounds = new Rect();

            for (View view : mInterceptScrollViews) {
                view.getHitRect(bounds);
                if (bounds.contains(x, y + scrollY)) {
                    //were touching a view that should intercept scrolling
                    return false;
                }
            }
        }

        return super.onInterceptTouchEvent(event);
    }
}

Thank you for suggestions,

After much try-and-error, pulling off my hairs and swearing at monitor and my poor Android test phone, I've figured that if I customise ScrollView, override onInterceptTouchEvent in which we return false when the event is on a map view no matter what, then the scrolling on a map does happen as expected.

class MyScrollView(c:Context, a:AttributeSet) extends ScrollView(c,a) {
  val parent = c.asInstanceOf[MyActivity]
  override def onInterceptTouchEvent(ev:MotionEvent):Boolean = {
    var bound:Rect = new Rect()
    parent.mMap.getHitRect(bound)
    if(bound.contains(ev.getX.toInt,ev.getY.toInt))
      false
    else
      super.onInterceptTouchEvent(ev)
  }
}

This code is in Scala but you get the idea.

Note I've ended up using a raw map view (as shown in android-sdks\extras\google\google_play_services\samples\maps\src\com\example\mapdemoRawMapViewDemoActivity.java). Guess you can do the pretty much same thing with fragments, I just never liked fragments in the first place.

I think Google owes me an apology.