[移动开发]Android RecyclerView适配器简单抽取(封装)

这里我们主要对RecyclerView进行抽取, 以此达到减少代码量
话不多说 直接上代码 照常使用即可 new适配器时不需要传上下文

package com.example.text_1.utils;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;

public abstract class BaseAdapter<T> extends RecyclerView.Adapter {
    private List<T> list;
    private Context context;

    public BaseAdapter(List<T> list) {
        this.list = list;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        context = parent.getContext();
        return new ViewHolder(LayoutInflater.from(context).inflate(setLayout(), parent, false));
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        ViewHolder holder1 = (ViewHolder) holder;
        onBindView(list, list.get(position), position, holder1, context, holder1.itemView);
        if (onItemClick != null) {
            holder1.itemView.setOnClickListener(v -> {
                onItemClick.OnClick(position);
            });

            holder1.itemView.setOnLongClickListener(v -> {       
                onItemClick.OnLongClick(position);
                return true;
            });
        }
    }

    public abstract void onBindView(List<T> list, T data, int pos, RecyclerView.ViewHolder holder, Context context, View view);

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

    public abstract int setLayout();

    public class ViewHolder extends RecyclerView.ViewHolder {
        public ViewHolder(View itemView) {
            super(itemView);
        }
    }

    public void showToast(Object o) {
        Toast.makeText(context, o.toString(), Toast.LENGTH_SHORT).show();
    }

    public OnItemClick onItemClick;

    public void setOnItemClick(OnItemClick onItemClick) {
        this.onItemClick = onItemClick;
    }

    public interface OnItemClick {
        void OnClick(int pos);
        default void OnLongClick(int pos) {

        }
    }
}

具体用法:

package com.example.text_1.adapter;

import android.content.Context;
import android.view.View;
import android.widget.TextView;

import androidx.recyclerview.widget.RecyclerView;
import com.example.text_1.R;
import com.example.text_1.bean.ProjectBean;
import com.example.text_1.utils.BaseAdapter;
import java.util.List;
import butterknife.BindView;
import butterknife.ButterKnife;

public class ProjectAdapter extends BaseAdapter<ProjectBean.FreeBean.CourseBean> {
    @BindView(R.id.tv_teacher_name)
    TextView tvTeacherName;
    @BindView(R.id.tv_title)
    TextView tvTitle;

    public ProjectAdapter(List<ProjectBean.FreeBean.CourseBean> list) {
        super(list);
    }

    @Override
    public void onBindView(List<ProjectBean.FreeBean.CourseBean> list, ProjectBean.FreeBean.CourseBean data, int pos, RecyclerView.ViewHolder holder, Context context, View view) {
        ButterKnife.bind(this,view);
        tvTitle.setText("题目:" + data.title);
        tvTeacherName.setText("讲师:" + data.teacherName);
    }

    @Override
    public int setLayout() {
        return R.layout.item_project_layout;
    }
}

点击事件监听:

        adapter.setOnItemClick(pos -> {
            //此处处理逻辑即可
            Toast.makeText(getContext(), list.get(pos).title, Toast.LENGTH_SHORT).show();
        });