android.support.v4.view.PagerAdapter#notifyDataSetChanged ( )源码实例Demo

private static void bind(ViewPager container, final ItemView itemView, final List<?> datas, final OnItemClickListener<?> onItemClickListener) {
    PagerAdapter adapter;
    if (datas != null && !datas.isEmpty()) {
        adapter = container.getAdapter();
        if(adapter == null) {
            // initialize, adapter is only set once !!!
            container.setAdapter(adapter = new CommonPagerAdapter<Object>(container.getContext(), itemView.layoutRes(), (List<Object>)datas) {
                @Override
                protected void convert(ViewHolder holder, Object data, int position) {
                    DataBindingUtil.bind(holder.itemView).setVariable(itemView.bindingVariable(), data);
                }
            });

            ((CommonPagerAdapter<Object>)adapter).setOnItemClickListener((OnItemClickListener<Object>)onItemClickListener);
        }

        adapter.notifyDataSetChanged();
    }
}
 

@Override
public void onRtlPropertiesChanged(int layoutDirection) {
    super.onRtlPropertiesChanged(layoutDirection);
    int viewCompatLayoutDirection = layoutDirection == View.LAYOUT_DIRECTION_RTL ?
            ViewCompat.LAYOUT_DIRECTION_RTL :
            ViewCompat.LAYOUT_DIRECTION_LTR;
    if (viewCompatLayoutDirection != mLayoutDirection) {
        PagerAdapter adapter = super.getAdapter();
        int position = 0;
        if (adapter != null) {
            position = getCurrentItem();
        }
        mLayoutDirection = viewCompatLayoutDirection;
        if (adapter != null) {
            adapter.notifyDataSetChanged();
            setCurrentItem(position);
        }
    }
}
 

@BindingAdapter(value = {"fragments", "curIndex"}, requireAll = false)
public static void bind(ViewPager container, final List<? extends Fragment> fragments, int curIndex) {
    if(!(container.getContext() instanceof FragmentActivity))
        throw new IllegalArgumentException(TAG + "context must instanceof FragmentActivity");
    FragmentManager fm = ((FragmentActivity) container.getContext()).getSupportFragmentManager();

    if (fragments != null && !fragments.isEmpty()) {
        PagerAdapter adapter = container.getAdapter();
        if(adapter == null) {
            // initialize, fragments are only added once !!!
            container.setAdapter(adapter = new FragmentPagerAdapter(fm) {
                @Override
                public Fragment getItem(int position) {
                    return fragments.get(position);
                }

                @Override
                public int getCount() {
                    return fragments.size();
                }
            });
        }

        adapter.notifyDataSetChanged();

        if(curIndex >= 0 && curIndex < fragments.size())
            container.setCurrentItem(curIndex);
    }
}
 

public static
void run(FeedsActivity activity)
{
    s_tagList = getTagsFromIndex(activity, activity.m_index);
    PagerAdapter adapter = s_viewPager.getAdapter();
    adapter.notifyDataSetChanged();
}