Android_RecyclerView

//RecyclerView的适配器

compile 'com.android.support:recyclerview-v7:26.+'  依赖根据版本添加

public class FenleiRecle extends RecyclerView.Adapter<FenleiRecle.MyVIewHolder>{      private Context context;    private ArrayList<Fenleifx> arr;     public FenleiRecle(Context context,ArrayList<Fenleifx> arr){         this.context=context;         this.arr=arr;         Log.e("chen", "MyVIewHolder: 7777777"+"11111111111111" );     }    @Override    public MyVIewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = View.inflate(context, R.layout.fenlei, null);        MyVIewHolder myVIewHolder = new MyVIewHolder(view);        Log.e("chen", "MyVIewHolder: 7777777"+"222222222222" );        return myVIewHolder;    }    @Override    public void onBindViewHolder(MyVIewHolder holder, int position) {        ImageView iv = holder.iv;        ImageLoader.getInstance().displayImage(arr.get(position).getImg(),iv);          holder.tv.setText(arr.get(position).getName());        Log.e("chen", "MyVIewHolder: 7777777"+"33333333333" );    }    @Override    public int getItemCount() {        return arr.size();    }    class MyVIewHolder extends RecyclerView.ViewHolder{         TextView tv;         ImageView iv;        public MyVIewHolder(View itemView) {            super(itemView);            tv = itemView.findViewById(R.id.tv);            iv = itemView.findViewById(R.id.iv);            Log.e("chen", "MyVIewHolder: 44444444444"+tv );        }    }}

//使用RecyclerView

 RecyclerView viewById = getActivity().findViewById(R.id.cxrcv);        GridLayoutManager gridLayoutManager = new GridLayoutManager(getContext(), 2, GridLayoutManager.HORIZONTAL, false);        viewById.setLayoutManager(gridLayoutManager);        viewById.setAdapter(new FenleiRecle(getContext(),arrayList));