Android sqlite数据库不是在eclips的“我的文件资源管理器”中创建的

我正在创建数据库，但当我运行应用程序时，数据库没有创建，catlog中没有错误，请帮助我。 并且在fileexplorer/data/data中没有创建文件夹名称数据库 而且，当我在MySQLiteHelper中将某些内容打印到控制台类时，也不会在控制台上打印任何内容。 请先帮我谢谢

公共类MySQLiteHelper扩展了SQLiteOpenHelper{

public static final String TABLE_NAME_BOY = "question_boy";
public static final String ID_BOY = "_id";
public static final String QUESTION_BOY = "questions";
public static final String ANSWER_BOY = "answer";

public static final String TABLE_NAME_GIRL = "questions_girl";
public static final String ID_GIRL = "_id";
public static final String QUESTION_GIRL = "questions";
public static final String ANSWER_GIRL = "answer";

private static final String DATABASE_NAME = "bg.database";
private static final int DATABASE_VERSION = 3;

private static final String CREATE_TABLE_BOY = "create table "
        + TABLE_NAME_BOY + "(" + ID_BOY
        + "integer primary key autoincrement, " + QUESTION_BOY + " text, "
        + ANSWER_BOY + " text);";

private static final String CREATE_TABLE_GIRL = "create table "
        + TABLE_NAME_GIRL + "(" + ID_GIRL
        + "integer primary key autoincrement, " + QUESTION_GIRL + " text, "
        + ANSWER_GIRL + " text);";

public MySQLiteHelper(Context context, String name,
        CursorFactory factory, int version) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
    // TODO Auto-generated constructor stub
}

@Override
public void onCreate(SQLiteDatabase db) {
    // TODO Auto-generated method stub

    db.execSQL(CREATE_TABLE_BOY);
    db.execSQL(CREATE_TABLE_GIRL);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    // TODO Auto-generated method stub
    Log.w(MySQLiteHelper.class.getName(),

            "Upgrading database from version " + oldVersion + " to "

                        + newVersion + ", which will destroy all old data");

db.execSQL("DROP TABLE IF EXISTS" + TABLE_NAME_BOY);
db.execSQL("DROP TABLE IF EXISTS" + TABLE_NAME_GIRL);

onCreate(db);
}

---

}

除非您的设备已根目录，否则无法访问该文件

看看这个问题：

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这应该为您创建一个数据库

public class DBHandler extends SQLiteOpenHelper {

    private SQLiteDatabase sqliteDatabaseInstance_ = null;

    public DBHandler(Context context){

        super(context, "TESTDATABASE.db", null, 1);
        sqliteDatabaseInstance_ = getWritableDatabase();
        sqliteDatabaseInstance_.execSQL("PRAGMA foreign_keys = ON;");
    }

@Override
    public void onCreate(SQLiteDatabase db) {

        try {

            db.execSQL("CREATE TABLE ACCOUNT (accountId INTEGER PRIMARY KEY, name TEXT)");

            db.execSQL("CREATE TABLE ORDER_DETAILS (orderNo INTEGER, accountId INTEGER," +
                    "FOREIGN KEY (accountId) REFERENCES ACCOUNT(accountId))");
        }catch (SQLiteConstraintException sqliteConstraintException) {

            System.out.println("sqliteConstraintException: " + sqliteConstraintException.getMessage());
        }catch (Exception e) {

            System.out.println("Exception in DBHandler.onCreate: "+e.getMessage());
        }
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {}

}

您的数据库文件应在

转到文件资源管理器------->data------->data------->com.test------->TESTDATA.db

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希望这有帮助。

我只是想创建一个空数据库，但数据库文件没有在数据文件夹中创建