Android studio项目能实现增删改查功能

是的，Android Studio项目可以实现增删改查功能。你可以使用SQLite数据库来存储数据，并使用Java代码来实现增删改查操作。这里是一个简单的示例：

1. 创建一个SQLite数据库和表格来存储数据。

public class DBHelper extends SQLiteOpenHelper {
    private static final String DATABASE_NAME = "mydatabase.db";
    private static final int DATABASE_VERSION = 1;

    private static final String TABLE_NAME = "mytable";
    private static final String COLUMN_ID = "id";
    private static final String COLUMN_NAME = "name";
    private static final String COLUMN_AGE = "age";

    private static final String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + "("
            + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"
            + COLUMN_NAME + " TEXT,"
            + COLUMN_AGE + " INTEGER)";

    public DBHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CREATE_TABLE);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        onCreate(db);
    }
}

2. 实现增删改查操作。

public class MyDAO {
    private SQLiteDatabase db;
    private DBHelper dbHelper;

    public MyDAO(Context context) {
        dbHelper = new DBHelper(context);
        db = dbHelper.getWritableDatabase();
    }

    public void addData(String name, int age) {
        ContentValues values = new ContentValues();
        values.put(DBHelper.COLUMN_NAME, name);
        values.put(DBHelper.COLUMN_AGE, age);
        db.insert(DBHelper.TABLE_NAME, null, values);
    }

    public void deleteData(int id) {
        db.delete(DBHelper.TABLE_NAME, DBHelper.COLUMN_ID + "=?", new String[]{String.valueOf(id)});
    }

    public void updateData(int id, String name, int age) {
        ContentValues values = new ContentValues();
        values.put(DBHelper.COLUMN_NAME, name);
        values.put(DBHelper.COLUMN_AGE, age);
        db.update(DBHelper.TABLE_NAME, values, DBHelper.COLUMN_ID + "=?", new String[]{String.valueOf(id)});
    }

    public List<MyData> getAllData() {
        List<MyData> dataList = new ArrayList<>();
        Cursor cursor = db.query(DBHelper.TABLE_NAME, null, null, null, null, null, null);
        while (cursor.moveToNext()) {
            int id = cursor.getInt(cursor.getColumnIndex(DBHelper.COLUMN_ID));
            String name = cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_NAME));
            int age = cursor.getInt(cursor.getColumnIndex(DBHelper.COLUMN_AGE));
            dataList.add(new MyData(id, name, age));
        }
        return dataList;
    }
}

其中，MyData是一个简单的Java类，用于存储从数据库中读取的数据。

这只是一个简单的示例，实际实现中可能需要更多的代码和复杂的逻辑。