android recycleview的操作规范及多个不同item设置_android recyclerview 同时修改多条item值

1、依赖：implementation ‘com.android.support:recyclerview-v7:28.0.0-rc01’，后面的版本号，与implementation 'com.android.support:appcompat-v7:28.0.0-rc01’的版本号保持一致，

2、Adapter：

package com.fpt.myrecycletest;

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 android.widget.TextView;

import java.util.List;

public class MyAdapter extends   RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<String> list;
    private Context context;
        private OnItemClickListener onItemClickListener；//外部接口调用
    public MyAdapter(List<String> list, Context context){
        this.list=list;
        this.context=context;
    }
    @NonNull
    @Override
    public MyAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    // 		这里的i最好不为final，
        View view= LayoutInflater.from(context).inflate(R.layout.list_item,viewGroup,false);
        MyAdapter.ViewHolder viewHolder=new MyAdapter.ViewHolder(view);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull MyAdapter.ViewHolder viewHolder, int i) {
    	//这里的i可以为final，但是上面的方法中，最好不要设置为final，要不然点击的时候，不同item点击的时候，i一直未某一个参数
    	//这里可以进行监听事件的接口接入
        viewHolder.mText.setText(list.get(i));
		viewHolder.mTextsetTag(i);//将各个text进行标记

    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    class ViewHolder extends RecyclerView.ViewHolder {
        TextView mText;
        ViewHolder(View itemView) {
            super(itemView);
            mText = itemView.findViewById(R.id.mian_tv);
            //设置点击事件应该在这里进行初始化
            mtext.setOnClickListener(MyAdapter.this);
        }
    }
      @Override
    public void onClick(View v) {
        int position= (int) v.getTag();
        if (onItemClickListener != null) {
            onItemClickListener.OnItemClick(v, position);
        }
    }
      public void setLayoutOnlickListener(OnItemClickListener onlickListener){
        onItemClickListener=onlickListener;
    }

}


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3、main中：

		recyclerView=findViewById(R.id.recycle);
        list=new ArrayList<>();
//        recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
        recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false));//设置横向
        recyclerView.setLayoutManager(new GridLayoutManager(this, 2));//设置3排；
//        recyclerView.setLayoutManager(new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL));//设置瀑布流：
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        for (int i=0;i<80;i++){
            list.add("冯绍峰"+i);
        }
        MyAdapter adapter=new MyAdapter(list,getBaseContext());
        recyclerView.setAdapter(adapter);

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4、在第一次了解调试recycle时，需要注意的是：在main.xml中，

<android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/recycle">
    </android.support.v7.widget.RecyclerView>
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height的高度最好为wrap_content,要不然，一item占满了整个屏幕，看似只有一个item，其实已经成功了，但你还在那捣鼓半天，还不知道自己已经成功了。
详细的可以参照这位大神的博客：https://blog.csdn.net/tuike/article/details/79064750

public class WchatDetailMainAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private static final int File_type = 0;
    private static final int Advertise_type = 1;
    private static final int Simple_type = 2;

    private List<WchatDetailInfo> list;
    private Context context;

    private int type=0;//0表示微信跳转，1表示qq跳转

    public WchatDetailMainAdapter(Context context, List<WchatDetailInfo> list,int type) {
        this.list = list;
        this.context = context;
        this.type=type;
    }

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

        RecyclerView.ViewHolder holer = null;
        if (viewType == File_type) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_recycle_wchat_detail_main_file_type, parent, false);
            holer = new FileViewHolder(view);
        } else if (viewType == Advertise_type) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_recycle_wchat_detail_main_advertise_type, parent, false);
            holer = new AdvertiseViewHolder(view);
        } else {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_recycle_wchat_detail_main_simple_type, parent, false);
            holer = new SimpleViewHolder(view);
        }
        return holer;
    }

    /**
     * 不同item管理
     * */
    @Override
    public int getItemViewType(int position) {
        if (position == 0) {
            return File_type;
        } else if (position == 1) {
            return Advertise_type;
        }
        return Simple_type;
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
        if (holder instanceof FileViewHolder) {
            FileViewHolder fileViewHolder = (FileViewHolder) holder;
            fileViewHolder.tv_size.setText(list.get(position).getSizeString());
            fileViewHolder.btn_do.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    if ("0B".equals(list.get(position).getSizeString())) {
                        ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                        return;
                    }
                    if (type==0){
                        JumpUtils.INSTANCE.fileDetailJump("其他文件", 7);
                    }else if (type==1){
                        JumpUtils.INSTANCE.fileDetailJump("其他文件", 16);
                    }
                }
            });
            return;
        }
        if (holder instanceof AdvertiseViewHolder) {
            AdvertiseViewHolder advertiseViewHolder = (AdvertiseViewHolder) holder;
            return;
        }

        if (holder instanceof SimpleViewHolder) {
            SimpleViewHolder simpleViewHolder = (SimpleViewHolder) holder;
            simpleViewHolder.tv_simple_hint.setText(list.get(position).getHint());
            simpleViewHolder.tv_simple_size.setText(list.get(position).getSizeString());
            simpleViewHolder.tv_simple_type.setText(list.get(position).getType());
            simpleViewHolder.simple_btn_do.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (type==0){
                        switch (position) {
                            case 2:
//                            图片
                                if ("0B".equals(list.get(position).getSizeString())) {
                                    ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                                    return;
                                }
                                Log.d("----", "onClick图片: ");
                                JumpUtils.INSTANCE.fileDetailJump("图片", 8);
                                break;
                            case 3:
//                            视频
                                if ("0B".equals(list.get(position).getSizeString())) {
                                    ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                                    return;
                                }
                                JumpUtils.INSTANCE.fileDetailJump("视频", 9);
                                break;
                            case 4:
//                            文档
                                if ("0B".equals(list.get(position).getSizeString())) {
                                    ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                                    return;
                                }
                                Log.d("----", "onClick文档: ");
                                JumpUtils.INSTANCE.fileDetailJump("文档", 10);
                                break;
                            case 5:
//                            音频
                                if ("0B".equals(list.get(position).getSizeString())) {
                                    ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                                    return;
                                }
                                JumpUtils.INSTANCE.fileDetailJump("音频", 11);
                                break;
                        }
                    }else if (type==1){
//                        qq跳转
                        switch (position) {
                            case 2:
//                            图片
                                if ("0B".equals(list.get(position).getSizeString())) {
                                    ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                                    return;
                                }
                                Log.d("----", "onClick图片: ");
                                JumpUtils.INSTANCE.fileDetailJump("图片", 12);
                                break;
                            case 3:
//                            视频
                                if ("0B".equals(list.get(position).getSizeString())) {
                                    ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                                    return;
                                }
                                JumpUtils.INSTANCE.fileDetailJump("视频", 13);
                                break;
                            case 4:
//                            文档
                                if ("0B".equals(list.get(position).getSizeString())) {
                                    ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                                    return;
                                }
                                Log.d("----", "onClick文档: ");
                                JumpUtils.INSTANCE.fileDetailJump("文档", 14);
                                break;
                            case 5:
//                            音频
                                if ("0B".equals(list.get(position).getSizeString())) {
                                    ToastUtils.INSTANCE.showCustomToast("暂无文件", context);
                                    return;
                                }
                                JumpUtils.INSTANCE.fileDetailJump("音频", 15);
                                break;
                        }
                    }

                }
            });

            FragmentHomeFileAdapter adapter = new FragmentHomeFileAdapter(new OnRecycleItemClickListener<FileInfo>() {
                @Override
                public void onItemClick(@NotNull View view, int position, FileInfo data) {

                }
            });
            List<FileInfo> listInfo = new ArrayList<>();

            if (list.get(position).getList().size()>4){
                for (int i = 0; i < 4; i++) {
                    listInfo.add(list.get(position).getList().get(i));
                }
            }else {
                for (int i=0;i<list.get(position).getList().size();i++){
                    listInfo.add(list.get(position).getList().get(i));
                }
            }

            adapter.setTotalNumber(list.get(position).getList().size());
            simpleViewHolder.recyclerView.setLayoutManager(new GridLayoutManager(context, 4));
            simpleViewHolder.recyclerView.setAdapter(adapter);
            simpleViewHolder.recyclerView.setNestedScrollingEnabled(false);

            adapter.appendToList(listInfo);
            adapter.notifyDataSetChanged();

            return;
        }
    }

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

    public class FileViewHolder extends RecyclerView.ViewHolder {
        TextView tv_size;
        TextView btn_do;

        public FileViewHolder(@NonNull View itemView) {
            super(itemView);
            tv_size = itemView.findViewById(R.id.item_wchat_detail_file_tv_size);
            btn_do = itemView.findViewById(R.id.item_wchat_detail_file_btn);
        }
    }

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

    public class SimpleViewHolder extends RecyclerView.ViewHolder {
        TextView tv_simple_size, tv_simple_type, tv_simple_hint;
        TextView simple_btn_do;
        RecyclerView recyclerView;

        public SimpleViewHolder(@NonNull View itemView) {
            super(itemView);
            tv_simple_hint = itemView.findViewById(R.id.item_wchat_main_simple_tv_hint);
            tv_simple_type = itemView.findViewById(R.id.item_wchat_main_simple_tv_type);
            tv_simple_size = itemView.findViewById(R.id.item_wchat_main_simple_tv_size);
            simple_btn_do = itemView.findViewById(R.id.item_wchat_main_simple_btn);
            recyclerView = itemView.findViewById(R.id.item_wchat_main_simple_recycle);
        }
    }
}

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