java - 为所有 Recycler View Adapters 创建基础适配器

Question

public abstract class BaseAdapters extends RecyclerView.Adapter<BaseAdapters.MyViewHolder> implements View.OnClickListener {

    protected Context parentContext;
    public int layout_id;
    protected List<?> dataList = new ArrayList<>();


    public class MyViewHolder extends RecyclerView.ViewHolder  {

         MyViewHolder(View view) {
            super(view);
            declareViews(view,this);
        }
    }

    @Override
    public void onClick(View view) {
        onClickViews(view);
    }

    @Override
    public int getItemViewType(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int i) {
        bindView(holder, i);
    }

    public void notifyList(List<?> filterdNames) {
        this.dataList = filterdNames;
        notifyDataSetChanged();
    }

    @Override
    public int getItemCount() {
        if (dataList.size() == 0)
            return 5;
        else
            return dataList.size();
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int i) {
        View itemView = LayoutInflater.from(parent.getContext()).inflate(layout_id, parent, false);
        return new MyViewHolder(itemView);
    }

    public abstract MyViewHolder bindView(MyViewHolder holder, int position);

    public abstract void onClickViews(View view);

    public abstract void declareViews(View view,MyViewHolder holder);

}

我如何使用扩展的子类中的 holder 单击每个项目选择。

Answer 1

    import android.app.Activity;
    import android.content.Context;
    import android.support.annotation.NonNull;
    import android.support.v7.widget.RecyclerView;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;

    import java.util.ArrayList;
    import java.util.List;

    public abstract class BaseAdapter extends RecyclerView.Adapter<BaseAdapter.MyViewHolder> {

        public int layout_id;
        protected List<?> dataList = new ArrayList<>();
        Context BASE_CONTEXT;
        public View itemview;

        public BaseAdapter(Context context) {
            this.BASE_CONTEXT = context;
        }

        @NonNull
        @Override
        public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
            View view = LayoutInflater.from(viewGroup.getContext()).inflate(layout_id, viewGroup, false);
            return new MyViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NonNull MyViewHolder viewHolder, int position) {
            onBindViewHold(position, dataList.get(position));
        }

        public abstract View getView(View view);

        @Override
        public int getItemCount() {
            return dataList.size() == 0 ? 0 : dataList.size();
        }


        public abstract void onBindViewHold(int position, Object itemView);

        class MyViewHolder extends RecyclerView.ViewHolder {


            public MyViewHolder(@NonNull View itemView) {
                super(itemView);
                itemview = itemView;
                getView(itemView);
            }

        }

        public <T extends View> T bind(int id) {
            return itemview.findViewById(id);
        }


    }

public class Adapter extends BaseAdapter {

    TextView tv;

    Adapter(Context context, ArrayList<String> arrayList){
      super(context);
      dataList=arrayList;
      layout_id=R.layout.content_main2;

    }


    @Override
    public View getView(View view) {
        tv = bind(R.id.tv);
        return view;
    }

    @Override
    public void onBindViewHold( final int position, Object itemView) {

        String text=(String) itemView;
        Log.e("tv",tv.toString());
        tv.setText(text);
        tv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(BASE_CONTEXT, ""+position, Toast.LENGTH_SHORT).show();
            }
        });
    }




}