开发家庭记账本APP——进度十

今天将数据库中记录的数据全部导入到主页面中，进行一个收入及支出的记录的显示

代码如下:

适配器AccountAdapter.java

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import java.util.List;

public class AccountAdapter extends ArrayAdapter {
    private final int resourceId;
    public AccountAdapter(Context context,int textViewResourceId,List<Account> objects){
        super(context,textViewResourceId,objects);
        resourceId=textViewResourceId;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent){
        Account account = (Account) getItem(position); // 获取当前项的Account/实例
        View view = LayoutInflater.from(getContext()).inflate(resourceId, null);//实例化一个对象
        TextView typetv,nametv,moneytv,timetv,notetv;
        typetv=view.findViewById(R.id.item_main_lv_type);
        nametv=view.findViewById(R.id.item_main_lv_name);
        moneytv=view.findViewById(R.id.item_main_lv_money);
        timetv=view.findViewById(R.id.item_main_lv_time);
        notetv=view.findViewById(R.id.item_main_lv_note);
        typetv.setText(account.getType());
        nametv.setText(account.getName());
        moneytv.setText(account.getMoney());
        timetv.setText(account.getTime());
        notetv.setText(account.getNote());
        return view;
    }
}

MainActivity.java

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {//ListView
    private List<Account> accountList=new ArrayList<Account>();
    private ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //ListView
        initAccount();//初始化
        AccountAdapter adapter=new AccountAdapter(MainActivity.this,R.layout.item,accountList);
        listView=findViewById(R.id.main_lv);//绑定listview
        listView.setAdapter(adapter);//设置adapter

    }
    private void initAccount(){
        //从数据库里面把数据取出来
        MyDatabaseHelper databaseHelper=new MyDatabaseHelper(this);
        SQLiteDatabase db=databaseHelper.getWritableDatabase();
        Cursor cursor=db.query("AcountBook",null,null,null,null,null,null);
        while(cursor.moveToNext()){
            String type=cursor.getString(cursor.getColumnIndex("type"));
            String name=cursor.getString(cursor.getColumnIndex("name"));
            String money=cursor.getString(cursor.getColumnIndex("money"));
            String time=cursor.getString(cursor.getColumnIndex("time"));
            String note=cursor.getString(cursor.getColumnIndex("note"));
            Account account=new Account(type,name,note,time,money);
            accountList.add(account);
        }
    }
}