android软件简约记账app开发day09-主页面模块，收支记账信息的展示

android软件简约记账app开发day09-主页面模块，收支记账信息的展示

我们第一天已经绘制了记账条目的界面，也在主界面设置了LietView来展示记账条目，今天来实现记账后再主界面的展示效果

首先在主界面设置组件对象

ListView todayLv;
List<AccountBean> mDatas;

重写onCreate方法，

@SuppressLint({"ResourceType", "WrongViewCast"})
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initTime();
    mDatas = new ArrayList<>();
    todayLv=findViewById(R.id.main_lv);
    Log.i("open52000", "onCreate: "+mDatas.toString());
    //设置适配器：加载每一行数据到列表当中
    adapter = new AccountAdapter(this, mDatas);
    Log.i("open52000", "onCreate: "+adapter.toString());
    Log.i("open52000", "onCreate: "+todayLv.toString());
    todayLv.setAdapter(adapter);
}

添加adapter类

设置ACcountAdapter来展现数据

package com.open.tally.adapter;
​
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
​
import com.open.tally.R;
import com.open.tally.db.AccountBean;
​
import java.util.Calendar;
import java.util.List;
​
public class AccountAdapter extends BaseAdapter {
    Context context;
    List<AccountBean>mDatas;
    LayoutInflater inflater;
    int year,month,day;
    public AccountAdapter(Context context, List<AccountBean> mDatas) {
        this.context = context;
        this.mDatas = mDatas;
        inflater = LayoutInflater.from(context);
        Calendar calendar = Calendar.getInstance();
        year = calendar.get(Calendar.YEAR);
        month = calendar.get(Calendar.MONTH)+1;
        day = calendar.get(Calendar.DAY_OF_MONTH);
    }
​
    @Override
    public int getCount() {
        return mDatas.size();
    }
​
    @Override
    public Object getItem(int position) {
        return mDatas.get(position);
    }
​
    @Override
    public long getItemId(int position) {
        return position;
    }
​
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.item_mainlv,parent,false);
            holder = new ViewHolder(convertView);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }
        AccountBean bean = mDatas.get(position);
        holder.typeIv.setImageResource(bean.getsImageId());
        holder.typeTv.setText(bean.getTypename());
        holder.beizhuTv.setText(bean.getBeizhu());
        holder.moneyTv.setText("￥ "+bean.getMoney());
        if (bean.getYear()==year&&bean.getMonth()==month&&bean.getDay()==day) {
            String time = bean.getTime().split(" ")[1];
            holder.timeTv.setText("今天 "+time);
        }else {
            holder.timeTv.setText(bean.getTime());
        }
        return convertView;
    }
​
    class ViewHolder{
        ImageView typeIv;
        TextView typeTv,beizhuTv,timeTv,moneyTv;
        public ViewHolder(View view){
            typeIv = view.findViewById(R.id.item_mainlv_iv);
            typeTv = view.findViewById(R.id.item_mainlv_tv_title);
            timeTv = view.findViewById(R.id.item_mainlv_tv_time);
            beizhuTv = view.findViewById(R.id.item_mainlv_tv_beizhu);
            moneyTv = view.findViewById(R.id.item_mainlv_tv_money);
​
        }
    }
}

添加查找数据库信息的方法

/*
 * 获取记账表当中某一天的所有支出或者收入情况
 * */
public static List<AccountBean>getAccountListOneDayFromAccounttb(int year,int month,int day){
    List<AccountBean>list = new ArrayList<>();
    String sql = "select * from accounttb where year=? and month=? and day=? order by id desc";
    Cursor cursor = db.rawQuery(sql, new String[]{year + "", month + "", day + ""});
    //遍历符合要求的每一行数据
    while (cursor.moveToNext()) {
        int id = cursor.getInt(cursor.getColumnIndexOrThrow("id"));
        String typename = cursor.getString(cursor.getColumnIndexOrThrow("typename"));
        String beizhu = cursor.getString(cursor.getColumnIndexOrThrow("beizhu"));
        String time = cursor.getString(cursor.getColumnIndexOrThrow("time"));
        int sImageId = cursor.getInt(cursor.getColumnIndexOrThrow("sImageId"));
        int kind = cursor.getInt(cursor.getColumnIndexOrThrow("kind"));
        float money = cursor.getFloat(cursor.getColumnIndexOrThrow("money"));
        AccountBean accountBean = new AccountBean(id, typename, sImageId, beizhu, money, time, year, month, day, kind);
        list.add(accountBean);
    }
    return list;
}

完善注主界面代码

public void onClick(View view) {
    switch (view.getId()){
        case R.id.main_iv_search:
            break;
        case  R.id.main_btn_exit:
            Intent it1=new Intent(this,RecordActivity.class);
            startActivity(it1);
            break;
        case R.id.main_btn_more:
            break;
    }
}
​
​
​
/* 获取今日的具体时间*/
private void initTime() {
    Calendar calendar = Calendar.getInstance();
    year = calendar.get(Calendar.YEAR);
    month = calendar.get(Calendar.MONTH)+1;
    day = calendar.get(Calendar.DAY_OF_MONTH);
}
​
// 当activity获取焦点时，会调用的方法
@Override
protected void onResume() {
    super.onResume();
    loadDBData();
}
// 加载数据库数据
private void loadDBData() {
    List<AccountBean> list = DBManager.getAccountListOneDayFromAccounttb(year, month, day);
    mDatas.clear();
    mDatas.addAll(list);
    adapter.notifyDataSetChanged();
}