模仿应用市场上记账软件实现记账软件的基本功能，并将记账的结果保存到Android本地数据库，并且功能 中至少需要包含recycleview控件显示所有的记账条目Android Studio代码

以下是一个简单的记账软件的Android Studio代码示例，实现了基本的记账功能并将结果保存到本地数据库中：

1. 首先在布局文件中添加一个EditText和一个Button，用于输入金额和提交记账条目：

<EditText
    android:id="@+id/editTextAmount"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="numberDecimal"
    android:hint="输入金额" />

<Button
    android:id="@+id/buttonAdd"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="添加" />

2. 在Activity中获取EditText和Button的引用，并设置点击事件：

public class MainActivity extends AppCompatActivity {

    private EditText editTextAmount;
    private Button buttonAdd;

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

        editTextAmount = findViewById(R.id.editTextAmount);
        buttonAdd = findViewById(R.id.buttonAdd);

        buttonAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 将记账条目添加到数据库中
                addEntryToDatabase();
                
                // 清空输入框
                editTextAmount.setText("");
            }
        });
    }

    private void addEntryToDatabase() {
        // 获取当前时间
        Date now = new Date();

        // 获取输入的金额
        double amount = Double.parseDouble(editTextAmount.getText().toString());

        // 创建一个新的记账条目
        Entry entry = new Entry(amount, now);

        // 将记账条目添加到数据库中
        DatabaseHelper.getInstance(this).addEntry(entry);
    }
}

3. 创建一个Entry类，用于表示一个记账条目：

public class Entry {

    private double amount;
    private Date date;

    public Entry(double amount, Date date) {
        this.amount = amount;
        this.date = date;
    }

    public double getAmount() {
        return amount;
    }

    public Date getDate() {
        return date;
    }
}

4. 创建一个DatabaseHelper类，用于管理数据库的创建和更新以及数据的插入和查询：

public class DatabaseHelper extends SQLiteOpenHelper {

    private static final String DATABASE_NAME = "entries.db";
    private static final int DATABASE_VERSION = 1;

    private static DatabaseHelper instance;

    private DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    public static synchronized DatabaseHelper getInstance(Context context) {
        if (instance == null) {
            instance = new DatabaseHelper(context.getApplicationContext());
        }
        return instance;
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE entries (_id INTEGER PRIMARY KEY AUTOINCREMENT, amount REAL, date INTEGER)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // 数据库升级时的操作
    }

    public void addEntry(Entry entry) {
        SQLiteDatabase db = getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put("amount", entry.getAmount());
        values.put("date", entry.getDate().getTime());

        db.insert("entries", null, values);

        db.close();
    }

    public List<Entry> getAllEntries() {
        List<Entry> entries = new ArrayList<>();

        SQLiteDatabase db = getReadableDatabase();

        Cursor cursor = db.rawQuery("SELECT * FROM entries ORDER BY date DESC", null);

        while (cursor.moveToNext()) {
            double amount = cursor.getDouble(cursor.getColumnIndex("amount"));
            long dateInMillis = cursor.getLong(cursor.getColumnIndex("date"));
            Date date = new Date(dateInMillis);

            Entry entry = new Entry(amount, date);
            entries.add(entry);
        }

        cursor.close();
        db.close();

        return entries;
    }
}

5. 在布局文件中添加一个RecyclerView控件，用于显示所有的记账条目：

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerViewEntries"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

6. 在Activity中获取RecyclerView的引用，并且将Adapter和LayoutManager设置给RecyclerView：

public class MainActivity extends AppCompatActivity {

    private EditText editTextAmount;
    private Button buttonAdd;
    private RecyclerView recyclerViewEntries;

    private EntriesAdapter entriesAdapter;

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

        editTextAmount = findViewById(R.id.editTextAmount);
        buttonAdd = findViewById(R.id.buttonAdd);
        recyclerViewEntries = findViewById(R.id.recyclerViewEntries);

        // 创建一个EntriesAdapter，并将其设置给RecyclerView
        entriesAdapter = new EntriesAdapter(DatabaseHelper.getInstance(this).getAllEntries());
        recyclerViewEntries.setAdapter(entriesAdapter);

        // 设置LinearLayoutManager给RecyclerView
        recyclerViewEntries.setLayoutManager(new LinearLayoutManager(this));

        buttonAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 将记账条目添加到数据库中
                addEntryToDatabase();

                // 清空输入框
                editTextAmount.setText("");

                // 更新RecyclerView的数据
                entriesAdapter.updateEntries(DatabaseHelper.getInstance(MainActivity.this).getAllEntries());
            }
        });
    }

    private void addEntryToDatabase() {
        // 获取当前时间
        Date now = new Date();

        // 获取输入的金额
        double amount = Double.parseDouble(editTextAmount.getText().toString());

        // 创建一个新的记账条目
        Entry entry = new Entry(amount, now);

        // 将记账条目添加到数据库中
        DatabaseHelper.getInstance(this).addEntry(entry);
    }
}

7. 创建一个EntriesAdapter类，用于将数据绑定到RecyclerView的ViewHolder上：

public class EntriesAdapter extends RecyclerView.Adapter<EntriesAdapter.EntryViewHolder> {

    private List<Entry> entries;

    public EntriesAdapter(List<Entry> entries) {
        this.entries = entries;
    }

    @NonNull
    @Override
    public EntryViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_entry, parent, false);
        return new EntryViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull EntryViewHolder holder, int position) {
        Entry entry = entries.get(position);

        holder.textViewAmount.setText(String.format(Locale.getDefault(), "%.2f", entry.getAmount()));
        holder.textViewDate.setText(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault()).format(entry.getDate()));
    }

    @Override
    public int getItemCount() {
        return entries.size();
    }

    public void updateEntries(List<Entry> entries) {
        this.entries = entries;
        notifyDataSetChanged();
    }

    static class EntryViewHolder extends RecyclerView.ViewHolder {

        TextView textViewAmount;
        TextView textViewDate;

        EntryViewHolder(@NonNull View itemView) {
            super(itemView);

            textViewAmount = itemView.findViewById(R.id.textViewAmount);
            textViewDate = itemView.findViewById(R.id.textViewDate);
        }
    }
}

8. 在布局文件中添加一个list_item_entry.xml文件，用于表示每个记账条目的布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="16dp">

    <TextView
        android:id="@+id/textViewAmount"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:textSize="16sp"
        android:textStyle="bold"
        android:textColor="@android:color/black" />

    <TextView
        android:id="@+id/textViewDate"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:textSize="12sp"
        android:textColor="@android:color/darker_gray" />

</LinearLayout>

这样，我们就完成了一个简单的记账软件的开发，并且将数据保存到了本地数据库中，并且使用RecyclerView控件显示所有的记账条目。