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Android Studio--家庭记账本（一）_家庭记账本android代码

作者：在线问答5 | 2024-07-06 14:48:44

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家庭记账本android代码

　　今天通过观看视频，根据老师所讲内容课程介绍和项目创建_Android记账本-慕课网，编译代码。实现了Android Studio记账本里面的增加功能

 源代码如下：

CostBean.java：

  1. package com.example.family;
  2.  
  3. import java.io.Serializable;
  4.  
  5. public class CostBean implements Serializable{
  6.     public String costTitle;
  7.     public String costDate;
  8.     public String costMoney;
  9.  
  10.     public String getCostTitle() {
  11.         return costTitle;
  12.     }
  13.  
  14.     public void setCostTitle(String costTitle) {
  15.         this.costTitle = costTitle;
  16.     }
  17.  
  18.     public String getCostDate() {
  19.         return costDate;
  20.     }
  21.  
  22.     public void setCostDate(String costDate) {
  23.         this.costDate = costDate;
  24.     }
  25.  
  26.     public String getCostMoney() {
  27.         return costMoney;
  28.     }
  29.  
  30.     public void setCostMoney(String costMoney) {
  31.         this.costMoney = costMoney;
  32.     }
  33.  
  34.     @Override
  35.     public String toString() {
  36.         return "CostBean{" +
  37.                 "costTitle='" + costTitle + '\'' +
  38.                 ", costDate='" + costDate + '\'' +
  39.                 ", costMoney='" + costMoney + '\'' +
  40.                 '}';
  41.     }
  42. }

CostListAdapter.java：

  1. package com.example.family;
  2.  
  3. import android.content.Context;
  4. import android.view.LayoutInflater;
  5. import android.view.View;
  6. import android.view.ViewGroup;
  7. import android.widget.BaseAdapter;
  8. import android.widget.TextView;
  9.  
  10. import java.util.List;
  11.  
  12. public class CostListAdapter extends BaseAdapter{
  13.  
  14.     private List<CostBean> mList;
  15.     private Context mContext;
  16.     private LayoutInflater mLayoutInflater;
  17.  
  18.     public CostListAdapter(Context context,List<CostBean> list){
  19.         mContext=context;
  20.         mList=list;
  21.         mLayoutInflater=LayoutInflater.from(context);
  22.     }
  23.     @Override
  24.     public int getCount() {
  25.         return mList.size();
  26.     }
  27.  
  28.     @Override
  29.     public Object getItem(int position) {
  30.         return mList.get(position);
  31.     }
  32.  
  33.     @Override
  34.     public long getItemId(int position) {
  35.         return position;
  36.     }
  37.  
  38.     @Override
  39.     public View getView(int position, View convertView, ViewGroup parent) {
  40.         ViewHolder viewHolder;
  41.         if(convertView==null){
  42.             viewHolder=new ViewHolder();
  43.             convertView=mLayoutInflater.inflate(R.layout.list_item,null);
  44.             viewHolder.mTvCostTitle=(TextView)convertView.findViewById(R.id.tv_title);
  45.             viewHolder.mTvCostDate=(TextView)convertView.findViewById(R.id.tv_date);
  46.             viewHolder.mTvCostMoney=(TextView)convertView.findViewById(R.id.tv_cost);
  47.             convertView.setTag(viewHolder);
  48.         }else{
  49.             viewHolder=(ViewHolder) convertView.getTag();
  50.         }
  51.         CostBean bean=mList.get(position);
  52.         viewHolder.mTvCostTitle.setText(bean.costTitle);
  53.         viewHolder.mTvCostDate.setText(bean.costDate);
  54.         viewHolder.mTvCostMoney.setText(bean.costMoney);
  55.         return convertView;
  56.     }
  57.  
  58.     private static class ViewHolder{
  59.         public TextView mTvCostTitle;
  60.         public TextView mTvCostDate;
  61.         public TextView mTvCostMoney;
  62.     }
  63. }

DatabaseHelper.java：

  1. package com.example.family;
  2.  
  3. import android.content.ContentValues;
  4. import android.content.Context;
  5. import android.database.Cursor;
  6. import android.database.sqlite.SQLiteDatabase;
  7. import android.database.sqlite.SQLiteOpenHelper;
  8.  
  9. import androidx.annotation.Nullable;
  10.  
  11.  
  12. public class DatabaseHelper extends SQLiteOpenHelper {
  13.  
  14.     public static final String COST_MONEY = "cost_money";
  15.     public static final String COST_DATE = "cost_date";
  16.     public static final String COST_TITLE = "cost_title";
  17.     public static final String FAMILY = "family";
  18.  
  19.     public DatabaseHelper(@Nullable Context context) {
  20.         super(context, FAMILY, null, 1);
  21.     }
  22.  
  23.     @Override
  24.     public void onCreate(SQLiteDatabase db) {
  25.         db.execSQL("create table if not exists family("+
  26.                 "id integer primary key,"+
  27.                 "cost_title varchar,"+
  28.                 "cost_date varchar,"+
  29.                 "cost_money varchar)");
  30.     }
  31.  
  32.     public void insertCost(CostBean costBean){
  33.         SQLiteDatabase database=getWritableDatabase();
  34.         ContentValues cv=new ContentValues();
  35.         cv.put(COST_TITLE,costBean.costTitle);
  36.         cv.put(COST_DATE,costBean.costDate);
  37.         cv.put(COST_MONEY,costBean.costMoney);
  38.         database.insert(FAMILY,null,cv);
  39.     }
  40.  
  41.     public Cursor getAllCostData(){
  42.         SQLiteDatabase database=getWritableDatabase();
  43.         return database.query(FAMILY,null,null,null,null,null,COST_DATE+" ASC");
  44.     }
  45.  
  46.     public  void deleteAllData(){
  47.         SQLiteDatabase database=getWritableDatabase();
  48.         database.delete(FAMILY,null,null);
  49.     }
  50.     @Override
  51.     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
  52.  
  53.     }
  54. }

MainActivity.java：

  1. package com.example.family;
  2.  
  3. import android.content.DialogInterface;
  4. import android.content.Intent;
  5. import android.database.Cursor;
  6. import android.os.Bundle;
  7. import com.google.android.material.floatingactionbutton.FloatingActionButton;
  8. import com.google.android.material.snackbar.Snackbar;
  9.  
  10. import androidx.appcompat.app.AlertDialog;
  11. import androidx.appcompat.app.AppCompatActivity;
  12. import androidx.appcompat.widget.Toolbar;
  13.  
  14. import android.view.LayoutInflater;
  15. import android.view.View;
  16. import android.view.Menu;
  17. import android.view.MenuItem;
  18. import android.widget.DatePicker;
  19. import android.widget.EditText;
  20. import android.widget.ListView;
  21.  
  22. import java.io.Serializable;
  23. import java.util.ArrayList;
  24. import java.util.List;
  25. public class MainActivity extends AppCompatActivity {
  26.  
  27.     private List<CostBean> mCostBeanList;
  28.     private DatabaseHelper mDatabaseHelper;
  29.     private CostListAdapter mAdapter;
  30.  
  31.     @Override
  32.     protected void onCreate(Bundle savedInstanceState) {
  33.         super.onCreate(savedInstanceState);
  34.         setContentView(R.layout.activity_main);
  35.         Toolbar toolbar = findViewById(R.id.toolbar);
  36.         setSupportActionBar(toolbar);
  37.  
  38.         mDatabaseHelper=new DatabaseHelper(this);
  39.         mCostBeanList=new ArrayList<>();
  40.         ListView costList=(ListView)findViewById(R.id.lv_main);
  41.         initCostData();
  42.         mAdapter =new CostListAdapter(this,mCostBeanList);
  43.         costList.setAdapter(mAdapter);
  44.  
  45.  
  46.        FloatingActionButton fab = findViewById(R.id.fab);
  47.         fab.setOnClickListener(new View.OnClickListener() {
  48.             @Override
  49.             public void onClick(View view) {
  50.                 AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);
  51.                 LayoutInflater inflater=LayoutInflater.from(MainActivity.this);
  52.                 View viewDialog=inflater.inflate(R.layout.new_cost_data,null);
  53.                 final EditText title=(EditText)viewDialog.findViewById(R.id.et_cost_title);
  54.                 final EditText money=(EditText)viewDialog.findViewById(R.id.et_cost_money);
  55.                 final DatePicker date=(DatePicker) viewDialog.findViewById(R.id.dp_cost_date);
  56.                 builder.setView(viewDialog);
  57.                 builder.setTitle("New Cost");
  58.                 builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
  59.                     @Override
  60.                     public void onClick(DialogInterface dialog, int which) {
  61.                         CostBean costBean=new CostBean();
  62.                         costBean.costTitle=title.getText().toString();
  63.                         costBean.costMoney=money.getText().toString();
  64.                         costBean.costDate=date.getYear() + "-" + (date.getMonth()+1) + "-" +
  65.                                 date.getDayOfMonth();
  66.                         mDatabaseHelper.insertCost(costBean);
  67.                         mCostBeanList.add(costBean);
  68.                         mAdapter.notifyDataSetChanged();
  69.                     }
  70.                 });
  71.                 builder.setNegativeButton("Cancle",null);
  72.                 builder.create().show();
  73.             }
  74.         });
  75.     }
  76.  
  77.     private void initCostData() {
  78. //        mDatabaseHelper.deleteAllData();
  79. //        for (int i=0;i<6;i++) {
  80. //            CostBean costBean=new CostBean();
  81. //            costBean.costTitle=i+"mock";
  82. //            costBean.costDate="2020-2-4";
  83. //            costBean.costMoney="20";
  84. //            mDatabaseHelper.insertCost(costBean);
  85. //        }
  86.         Cursor cursor=mDatabaseHelper.getAllCostData();
  87.         if(cursor!=null){
  88.             while(cursor.moveToNext()){
  89.                 CostBean costBean=new CostBean();
  90.                 costBean.costTitle=cursor.getString(cursor.getColumnIndex("cost_title"));
  91.                 costBean.costDate=cursor.getString(cursor.getColumnIndex("cost_date"));
  92.                 costBean.costMoney=cursor.getString(cursor.getColumnIndex("cost_money"));
  93.                 mCostBeanList.add(costBean);
  94.             }
  95.             cursor.close();
  96.         }
  97.     }
  98.  
  99.     @Override
  100.     public boolean onCreateOptionsMenu(Menu menu) {
  101.         // Inflate the menu; this adds items to the action bar if it is present.
  102.         getMenuInflater().inflate(R.menu.menu_main, menu);
  103.         return true;
  104.     }
  105.  
  106.     @Override
  107.     public boolean onOptionsItemSelected(MenuItem item) {
  108.         int id = item.getItemId();
  109.         if (id == R.id.action_chart) {
  110.             Intent intent=new Intent(MainActivity.this,ChartsActivity.class);
  111.             intent.putExtra("cost_list", (Serializable) mCostBeanList);
  112.             startActivity(intent);
  113.             return true;
  114.         }
  115.  
  116.  
  117.         return super.onOptionsItemSelected(item);
  118.     }
  119. }

content_main.xml：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout
  3.     xmlns:android="http://schemas.android.com/apk/res/android"
  4.     xmlns:tools="http://schemas.android.com/tools"
  5.     xmlns:app="http://schemas.android.com/apk/res-auto"
  6.     android:layout_width="match_parent"
  7.     android:layout_height="match_parent"
  8.     app:layout_behavior="@string/appbar_scrolling_view_behavior"
  9.     tools:showIn="@layout/activity_main"
  10.     tools:context=".MainActivity">
  11.  
  12.     <ListView
  13.         android:layout_width="wrap_content"
  14.         android:layout_height="wrap_content"
  15.         android:id="@+id/lv_main"/>
  16.  
  17. </RelativeLayout>

list_item.xml：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:orientation="vertical"
  4.     android:layout_width="match_parent"
  5.     android:layout_height="80dp">
  6.     <TextView
  7.         android:id="@+id/tv_title"
  8.         android:layout_width="150dp"
  9.         android:layout_height="80dp"
  10.         android:layout_marginLeft="10dp"
  11.         android:layout_alignParentLeft="true"
  12.         android:gravity="center"
  13.         android:singleLine="true"
  14.         android:textSize="35sp"
  15.         android:ellipsize="marquee"
  16.         android:text="costTitle"/>
  17.  
  18.     <TextView
  19.         android:id="@+id/tv_date"
  20.         android:layout_width="100dp"
  21.         android:layout_height="80dp"
  22.         android:gravity="center"
  23.         android:textSize="20sp"
  24.         android:layout_marginLeft="15dp"
  25.         android:layout_toRightOf="@+id/tv_title"
  26.         android:text="costDate"/>
  27.     <TextView
  28.         android:id="@+id/tv_cost"
  29.         android:layout_width="100dp"
  30.         android:layout_height="80dp"
  31.         android:gravity="center"
  32.         android:layout_alignParentRight="true"
  33.         android:layout_marginRight="20dp"
  34.         android:textSize="30sp"
  35.         android:text="30"/>
  36.  
  37. </RelativeLayout>

new_cost_data.xml：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:orientation="vertical" android:layout_width="match_parent"
  4.     android:gravity="center"
  5.     android:layout_height="match_parent">
  6.  
  7.  
  8.     <EditText
  9.         android:id="@+id/et_cost_title"
  10.         android:layout_width="match_parent"
  11.         android:layout_height="match_parent"
  12.         android:layout_margin="4dp"
  13.         android:hint="Cost Title"/>
  14.  
  15.     <EditText
  16.         android:id="@+id/et_cost_money"
  17.         android:layout_width="match_parent"
  18.         android:layout_height="wrap_content"
  19.         android:layout_margin="4dp"
  20.         android:hint="Cost Money"/>
  21.  
  22.     <DatePicker
  23.         android:id="@+id/dp_cost_date"
  24.         android:layout_width="wrap_content"
  25.         android:layout_height="wrap_content"
  26.         android:layout_margin="4dp"
  27.         android:datePickerMode="spinner"
  28.         android:calendarViewShown="false"/>
  29.  
  30.  
  31. </LinearLayout>

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