无需滚动到顶部即可更新 recyclerView Adapter

Question

我在添加一些数据后尝试更新我的适配器但它没有更新，当我切换其他活动并回来时，适配器这次更新了我的代码：

    void updateAdapter(){
    adapter.setData(getData());
    adapter.notifyDataSetChanged();
    Log.d("TAG"," DATA SIZE AFTER UPDATE : "+getData().size() +" items : "+adapter.getItemCount());

}

我的适配器：

    private void createAdapter(final RecyclerView recyclerView , final List<Information> data) {
    List<Information> content = new ArrayList<>();

    Log.d("TAG","createAdapter Called");

    final int[] currentRowPosition = {0};
    content = data;
    final List<Information> finalContent = content;
     adapter = new ParallaxRecyclerAdapter<Information>(finalContent) {

/// my onBindViewHolder
        @Override
        public void onBindViewHolderImpl(final RecyclerView.ViewHolder viewHolder, final ParallaxRecyclerAdapter<Information> adapter, final int i) {


            currentRowPosition[0] = i;

            if ( i <= finalContent.size() -1 ){

                ((ViewHolder) viewHolder).linearLayout.setVisibility(View.GONE);

            final Information current = finalContent.get(i);

            ((ViewHolder) viewHolder).DESCRIPTION.setText(current.description);

        }else {

                 // this is my loadMore button which stays at the last row of recyclerView 
                ((ViewHolder) viewHolder).setIsRecyclable(false);
                ((ViewHolder) viewHolder).linearLayout.setVisibility(View.VISIBLE);
                ((ViewHolder) viewHolder).itemView.getLayoutParams().height = 100;


                ((ViewHolder) viewHolder).LOADMORE.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        fetchNext();
                    }
                });

            }

        }
//my on create View Holder
        @Override
        public RecyclerView.ViewHolder onCreateViewHolderImpl(ViewGroup viewGroup, final ParallaxRecyclerAdapter<Information> adapter, int i) {

            return  new ViewHolder(getActivity().getLayoutInflater().inflate(R.layout.custom_row, viewGroup, false));

        }

        @Override
        public int getItemCountImpl(ParallaxRecyclerAdapter<Information> adapter) {
            return finalContent.size()+1;
        }
    });
// adding header to recyclerView  
    recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
    View header = getActivity().getLayoutInflater().inflate(R.layout.header, recyclerView, false);

    headerImageView =  (ImageView) header.findViewById(R.id.headerImageView);
    //setting CoverImage

    adapter.setParallaxHeader(header, recyclerView);

    adapter.setData(content);
    recyclerView.setAdapter(adapter);

}

知道如何在 RecyclerView 上实时更新添加新项目吗？任何指导都会对我有帮助

Answer 1

适配器类

public void add(List<Information> informations){
try{
finalContent.addAll(informations);
}catch(Exception e){
e.printstacktrace();
}
notifyDataSetChanged();
}