2月10日

完成安卓的记账本的基本框架的构成：主要今天完成的是外框和fragment和适配器

适配器的代码

package com.eb.writeaccount;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Switch;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.DiffUtil;
import androidx.recyclerview.widget.ListAdapter;
import androidx.recyclerview.widget.RecyclerView;

public class MyAdapter extends ListAdapter<Word,MyAdapter.MyViewHolder> {

    private MyViewModel myViewModel;
    MyAdapter( MyViewModel wordViewModel) {
        super(new DiffUtil.ItemCallback<Word>() {
            @Override
            public boolean areItemsTheSame(@NonNull Word oldItem, @NonNull Word newItem) {
                return oldItem.getId() == newItem.getId();
            }

            @Override
            public boolean areContentsTheSame(@NonNull Word oldItem, @NonNull Word newItem) {
                return (oldItem.getMoney().equals(newItem.getMoney())
                        && oldItem.getAtime().equals(newItem.getMoney())
                       );
            }
        });

        this.myViewModel = wordViewModel;
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View itemView;
        itemView = layoutInflater.inflate(R.layout.word,parent,false);
        final MyViewHolder holder = new MyViewHolder(itemView);
        return holder;
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        final Word word = getItem(position);
        holder.textViewNumber.setText(String.valueOf(position + 1));
        holder.textViewmoney.setText(word.getMoney());
        holder.textViewtime.setText(word.getAtime());
    }
    public void onViewAttachedToWindow(@NonNull MyViewHolder holder) {
        super.onViewAttachedToWindow(holder);
        holder.textViewNumber.setText(String.valueOf(holder.getAdapterPosition() + 1));
    }
    static class MyViewHolder extends RecyclerView.ViewHolder {
        TextView textViewNumber,textViewmoney,textViewtime;


        MyViewHolder(@NonNull View itemView) {
            super(itemView);
            textViewNumber = itemView.findViewById(R.id.textViewnumber);
            textViewmoney = itemView.findViewById(R.id.textViewmoney);
            textViewtime = itemView.findViewById(R.id.textViewtime);


        }
    }
}