ViewPager does not redraw content, remains/turns blank

Question

We\'re suffering from a very strange issue with ViewPager here. We embed lists on each ViewPager page, and trigger notifyDataSetChanged both on the list adapter and the view

Answer 1

I had similar issue. I cache views because I need only 3 views in ViewPager. When I slide forward everything is okay but when I start to slide backward occurs error, it says that "my view already has a parent". The solution is to delete unneeded items manually.

@Override
    public Object instantiateItem(ViewGroup container, int position) {
        int localPos = position % SIZE;
        TouchImageView view;
        if (touchImageViews[localPos] != null) {
            view = touchImageViews[localPos];
        } else {
            view = new TouchImageView(container.getContext());
            view.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
            touchImageViews[localPos] = view;
        }
        view.setImageDrawable(mDataModel.getPhoto(position));
        Log.i(IRViewPagerAdpt.class.toString(), "Add view " + view.toString() + " at pos: " + position + " " + localPos);
        if (view.getParent() == null) {
        ((ViewPager) container).addView(view);
    }
        return view;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object view) {
        //      ((ViewPager) container).removeView((View) view);
        Log.i(IRViewPagerAdpt.class.toString(), "remove view " + view.toString() + " at pos: " + position);
    }

..................

private static final int SIZE = 3;
private TouchImageView[] touchImageViews = new TouchImageView[SIZE];