RecyclerView的适配器

//适配器   
 public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
    private List<Userbean.NewslistBean> list;
    private Context context;

    public MyAdapter(List<Userbean.NewslistBean> list, MainActivity context) {
        this.list = list;
        this.context = context;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.item,parent,false);
        return new MyViewHolder(view);
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        MyViewHolder my = (MyViewHolder) holder;
        my.tv.setText(list.get(position).getTitle());
        Uri uri = Uri.parse(list.get(position).getPicUrl());
        my.img.setImageURI(uri);
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    class MyViewHolder extends RecyclerView.ViewHolder{

        private final TextView tv;
        private final SimpleDraweeView img;

        public MyViewHolder(View itemView) {
            super(itemView);
            img = itemView.findViewById(R.id.img);
            tv = itemView.findViewById(R.id.tv_01);
        }
    }

}
//主页面

public class MainActivity extends AppCompatActivity implements IMainActivity {

    private RecyclerView mRv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        GoodsP goodsP = new GoodsP(this);
        goodsP.add();
        mRv.setLayoutManager(new LinearLayoutManager(this));
    }

    @Override
    public void show(List<Userbean.NewslistBean> list) {
        MyAdapter myAdapter = new MyAdapter(list, this);
        mRv.setAdapter(myAdapter);
    }

    private void initView() {
        mRv = (RecyclerView) findViewById(R.id.rv);
    }
}