记账本

创建一个empty activity

在activity_main.xml里编写主界面布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/list_view"
        android:layout_width="wrap_content"
        android:layout_height="650dp"
     />

    <ImageButton
        android:id="@+id/add"
        android:onClick="addAccount"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:scaleType="centerInside"
        android:layout_centerHorizontal="true"
        android:background="#00FF0000"
        android:src="@drawable/tianjia"
        android:layout_below="@+id/list_view" />
</RelativeLayout>

View Code

然后写listview，创建xml文件并命名为list_item

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="80dp">

    <TextView
        android:id="@+id/tv_title"
        android:layout_width="150dp"
        android:layout_height="80dp"
        android:layout_marginLeft="10dp"
        android:layout_alignParentLeft="true"
        android:gravity="center"
        android:singleLine="true"
        android:textSize="20sp"
        android:ellipsize="marquee"
        android:text="costTitle" />

    <TextView
        android:id="@+id/tv_date"
        android:layout_width="wrap_content"
        android:layout_height="80dp"
        android:gravity="center"
        android:textSize="20sp"
        android:layout_marginLeft="15dp"
        android:layout_toRightOf="@+id/tv_title"
        android:text="2020-05-31"/>

    <TextView
        android:id="@+id/tv_money"
        android:layout_width="wrap_content"
        android:layout_height="80dp"
        android:gravity="center"
        android:layout_alignParentRight="true"
        android:layout_marginRight="20dp"
        android:textSize="25sp"
        android:textColor="#ffbd27"
        android:text="25"/>
</RelativeLayout>

View Code

写完listView之后要为其添加适配器，创建java文件并命名为ListAdapter

package com.example.myaccountapp;

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

import java.util.List;

public class ListAdapter extends BaseAdapter {
    List<costList> mList;

    public ListAdapter(List<costList>list)
    {
        mList=list;
    }

    @Override
    public int getCount() {
        return mList.size();
    }

    @Override
    public Object getItem(int position) {
        return mList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
       View view=mLayoutInflater.inflate(R.layout.list_item,null);
       //取出数据赋值
        costList item=mList.get(position);
        TextView tv_title=view.findViewById(R.id.tv_title);
        TextView tv_date=view.findViewById(R.id.tv_date);
        TextView tv_money=view.findViewById(R.id.tv_money);
        //绑定
        tv_title.setText(mList.get(position).getTitle());
        tv_date.setText(mList.get(position).getDate());
        tv_money.setText(mList.get(position).getMoney());
        return view;

    }

    private List<costList>getmList;
    private LayoutInflater mLayoutInflater;

    public ListAdapter(Context context,List<costList>list)
    {
        mList=list;
        //通过外部传来的Context初始化LayoutInflater对象
        mLayoutInflater=LayoutInflater.from(context);
    }
}

View Code

 

标签：tv,mList,记账,position,import,public,view
来源： https://www.cnblogs.com/headl-voi/p/15877345.html