android scroll while drag & drop

Question

Hi I am trying to do a drag and drop on a ListView. It works great. But I lost the ability to click and scroll. How to I retain those two? I was thinkng the drag and drop should happen on long press of the item instead of a normal press. Here is my onTouch that is located in the MyListView that extends ListView

@Override
    public boolean onTouchEvent(MotionEvent ev) {
        final int action = ev.getAction();
        final int x = (int) ev.getX();
        final int y = (int) ev.getY();  

        if (action == MotionEvent.ACTION_DOWN && x < this.getWidth()/4) {
            this._dragMode = true;
        }

        if (!this._isDragNDrop) 
            return super.onTouchEvent(ev);

        switch (action) {
            case MotionEvent.ACTION_DOWN:
                this._startPosition = pointToPosition(x,y);
                if (this._startPosition != INVALID_POSITION) {
                    int mItemPosition = this._startPosition - getFirstVisiblePosition();
                    this._dragPointOffset = y - getChildAt(mItemPosition).getTop();
                    this._dragPointOffset -= ((int)ev.getRawY()) - y;
                    startDrag(mItemPosition,y);
                    drag(x,y);
                }   
                break;
            case MotionEvent.ACTION_MOVE:
                drag(x,y);
                break;
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
            default:
                this._dragMode = false;
                //_isDragNDrop = false;
                this._endPosition = pointToPosition(x,y);
                stopDrag(this._startPosition - getFirstVisiblePosition());
                if (this._dropListener != null && this._startPosition != INVALID_POSITION && this._endPosition != INVALID_POSITION) 
                    this._dropListener.onDrop(this._startPosition, this._endPosition);
                break;
        }
        return true;
    }

Answer 1

I implemented this solution which works for me. The following method is in my Activity and it is called in my dragEventListener when the dragEvent is ACTION_DRAG_ENTERED. Some attributes I declared:

//first visible item (getFirstVisiblePosition() does not work for me)
int firstVisible;
//number of scrolls
int nbrScroll;
//my listview to scroll
ListView mListView;
//the adapter of my listview
SimpleAdapter mAdapter;

...

public void scrollDrag(int position) {
            //this is the position of the item in my listview
            //to scroll down
            //test if the item entered is the last visible
    if (position == mListView.getLastVisiblePosition()
            && id < mListView.getCount()) {
        mAdapter.notifyDataSetChanged();
        mRightDrawerList.post(new Runnable() {
            @Override
            public void run() {
                //scroll down
                mListView.smoothScrollToPosition(mListView
                        .getLastVisiblePosition() + 1);
                firstVisible++;
            }
        });
            //to scroll up
            //test if the item entered is the first visible
    } else if (position == firstVisible && position !=0) {
        mAdapter.notifyDataSetChanged();
        mListView.post(new Runnable() {
            @Override
            public void run() {
                //scroll up
                mListView.smoothScrollToPosition(firstVisible-1);
                firstVisible --;
            }
        });
    }
}

Hope it will help someone.