个人作业——家庭记账本

主要代码：

MainActivity.java

package com.example.jizhangben;

import android.content.DialogInterface;
import android.database.Cursor;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ListView;

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

public class MainActivity extends AppCompatActivity {

    private List<CostBean> mCostBeanList;
    private DatabaseHelper mDatabaseHelper;
    private CostListAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        mDatabaseHelper=new DatabaseHelper(this);
        mCostBeanList=new ArrayList<>();
        ListView costList= (ListView) findViewById(R.id.lv_main);
        initCostData();
        adapter = new CostListAdapter(this, mCostBeanList);
        costList.setAdapter(adapter);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);
                LayoutInflater inflate=LayoutInflater.from(MainActivity.this);
                View viewDialog=inflate.inflate(R.layout.new_cost_data,null);
                final EditText tltle= (EditText) viewDialog.findViewById(R.id.et_cost_title);
                final EditText money= (EditText) viewDialog.findViewById(R.id.et_cost_money);
                final DatePicker date= (DatePicker) viewDialog.findViewById(R.id.dp_cost_date);
                builder.setView(viewDialog);
                builder.setTitle("添加记录");
                builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        CostBean costBean=new CostBean();
                        costBean.CostTitle=tltle.getText().toString();
                        costBean.CostMoney=money.getText().toString();
                        costBean.CostDate=date.getYear()+"-"+(date.getMonth()+1)+"-"+
                                date.getDayOfMonth();
                        mDatabaseHelper.insertCost(costBean);
                        mCostBeanList.add(costBean);
                        adapter.notifyDataSetChanged();
                    }
                });
                builder.setNegativeButton("取消",null);
                builder.create().show();
            }
        });
    }

    private void initCostData() {
        // mDatabaseHelper.deleteAllData();
        //      for (int i=0;i<6;i++) {
        //         CostBean costBean=new CostBean();
        //        costBean.CostTitle=i+"mock";
        //       costBean.CostDate="11-11";
        //      costBean.CostMoney="21";
        //      mDatabaseHelper.insertCost(costBean);
        //     }
        Cursor cursor=mDatabaseHelper.getAllCostData();
        if(cursor!=null){
            while(cursor.moveToNext()){
                CostBean costBean=new CostBean();
                costBean.CostTitle=cursor.getString(cursor.getColumnIndex("cost_title"));
                costBean.CostDate=cursor.getString(cursor.getColumnIndex("cost_date"));
                costBean.CostMoney=cursor.getString(cursor.getColumnIndex("cost_money"));
                mCostBeanList.add(costBean);
            }
            cursor.close();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

CostBean.java

package com.example.jizhangben;

public class CostBean {

    public String CostTitle;
    public String CostDate;
    public String CostMoney;

}

CostListAdapter.java

package com.example.jizhangben;
        import android.content.Context;
        import android.view.LayoutInflater;
        import android.view.View;
        import android.view.ViewGroup;
        import android.widget.BaseAdapter;
        import android.widget.TextView;

        import java.util.List;

/**
 * Created by 惠普 on 2021/2/18.
 */

public class CostListAdapter extends BaseAdapter {

    private List<CostBean> mList;
    private Context mContext;
    private LayoutInflater mLayoutInflater;

    public CostListAdapter(Context context,List<CostBean> list){
        mContext=context;
        mList=list;
        mLayoutInflater=LayoutInflater.from(context);
    }
    @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) {
        ViewHolder viewHolder;
        if(convertView==null){
            viewHolder=new ViewHolder();
            convertView=mLayoutInflater.inflate(R.layout.list_item,null);
            viewHolder.mTvCostTitle=(TextView)convertView.findViewById(R.id.tv_title);
            viewHolder.mTvCostDate=(TextView)convertView.findViewById(R.id.tv_date);
            viewHolder.mTvCostMoney=(TextView)convertView.findViewById(R.id.tv_cost);
            convertView.setTag(viewHolder);
        }else{
            viewHolder= (ViewHolder) convertView.getTag();
        }
        CostBean bean=mList.get(position);
        viewHolder.mTvCostTitle.setText(bean.CostTitle);
        viewHolder.mTvCostDate.setText(bean.CostDate);
        viewHolder.mTvCostMoney.setText(bean.CostMoney);
        return convertView;
    }

    private static class ViewHolder{
        public TextView mTvCostTitle;
        public TextView mTvCostDate;
        public TextView mTvCostMoney;
    }

DataBaseHelper.java

package com.example.jizhangben;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by 惠普 on 2021/2/20.
 */

public class DatabaseHelper extends SQLiteOpenHelper {

    public static final String COST_MONEY = "cost_money";
    public static final String COST_DATE = "cost_date";
    public static final String COST_TITLE = "cost_title";
    public static final String IMOOC_COST = "Homework";

    public DatabaseHelper(Context context) {
        super(context, "homework", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("create table if not exists Homework(" +
                "id integer primary key, " +
                "cost_title varchar, "+
                "cost_date varchar, "+
                "cost_money varchar)");
    }

    public void insertCost(CostBean costBean){
        SQLiteDatabase database=getWritableDatabase();
        ContentValues cv=new ContentValues();
        cv.put(COST_TITLE,costBean.CostTitle);
        cv.put(COST_DATE,costBean.CostDate);
        cv.put(COST_MONEY,costBean.CostMoney);
        database.insert(IMOOC_COST,null,cv);
    }

    public Cursor getAllCostData(){
        SQLiteDatabase database=getWritableDatabase();
        return database.query(IMOOC_COST, null, null, null, null, null, COST_DATE+" ASC");
    }

    public void deleteAllData(){
        SQLiteDatabase database=getWritableDatabase();
        database.delete(IMOOC_COST,null,null);
    }
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    }
}

AndroidMainifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.jizhangben">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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="com.example.jizhangben.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_main" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:srcCompat="@android:drawable/ic_dialog_email" />

</android.support.design.widget.CoordinatorLayout>

content_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    android:paddingBottom="16dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingTop="16dp"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.example.homework.MainActivity"
    tools:showIn="@layout/activity_main">

    <ListView
        android:id="@+id/lv_main"
        android:layout_width="336dp"
        android:layout_height="463dp"
        tools:layout_editor_absoluteY="8dp"
        tools:layout_editor_absoluteX="8dp" />

</android.support.constraint.ConstraintLayout>

list_item.xml

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


    <TextView
        android:id="@+id/tv_title"
        android:layout_width="100dp"
        android:layout_height="80dp"
        android:gravity="center"
        android:textSize="20sp"
        android:layout_marginLeft="15dp"
        android:textColor="#836F91"
        android:layout_toRightOf="@+id/tv_date"
        android:text="costTitle"/>


    <TextView
        android:id="@+id/tv_date"
        android:layout_width="wrap_content"
        android:layout_height="80dp"
        android:layout_marginLeft="10dp"
        android:layout_alignParentLeft="true"
        android:gravity="center"
        android:singleLine="true"
        android:textSize="25sp"
        android:ellipsize="marquee"
        android:focusable="true"
        android:marqueeRepeatLimit="marquee_forever"
        android:focusableInTouchMode="true"
        android:textColor="#836F91"
        android:text="costDate"/>

    <TextView
        android:id="@+id/tv_cost"
        android:layout_width="wrap_content"
        android:layout_height="80dp"
        android:gravity="center"
        android:layout_alignParentRight="true"
        android:textSize="25sp"
        android:textColor="#836F91"
        android:layout_marginRight="20dp"
        android:text="30"/>
</RelativeLayout>

new_cost_data.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:gravity="center"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <EditText
        android:id="@+id/et_cost_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="4dp"
        android:hint="消费原因"/>

    <EditText
        android:id="@+id/et_cost_money"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="4dp"
        android:hint="消费金额"/>

    <DatePicker
        android:id="@+id/dp_cost_date"
        android:layout_margin="4dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />


</LinearLayout>