编译PRAGMA journal_mode时，无法打开数据库文件(代码14)

Question

以下是我在DatabaseHelper类中所做的操作。

public DatabaseHelper(Context context)
    {
        super(context, DATABASENAME, null, VERSION);
        context.openOrCreateDatabase(DATABASENAME, context.MODE_PRIVATE, null);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String queryProductsAllData = "CREATE TABLE `"+TABLE_PRODUCTS+"` (n" +
                        "t`"+COLUMN_BRANDID                +"`tINTEGER,n" +
                        "t`"+COLUMN_PRODUCTID              +"`tINTEGER,n" +
                        "t`"+COLUMN_PRODUCTCODE            +"`tINTEGER,n" +
                        "t`"+COLUMN_PIECESINCASE           +"`tINTEGER,n" +
                        "t`"+COLUMN_PRODUCT_STOCK_UNITS    +"`tINTEGER DEFAULT 0,n" +
                        "t`"+COLUMN_PRODUCTADDEDBY         +"`tINTEGER,n" +
                        "t`"+COLUMN_BRANDCODE              +"`tTEXT,n" +
                        "t`"+COLUMN_BRANDNAME              +"`tTEXT,n" +
                        "t`"+COLUMN_PRODUCTNAME            +"`tTEXT,n" +
                        "t`"+COLUMN_PRODUCTSHORTNAME       +"`tTEXT,n" +
                        "t`"+COLUMN_PIECENETVOLUME         +"`tTEXT,n" +
                        "t`"+COLUMN_PRICEPOINT             +"`tTEXT,n" +
                        "t`"+COLUMN_TRADEPRICEPERCASE      +"`tTEXT,n" +
                        "t`"+COLUMN_TRADEPRICEPERPIECE     +"`tTEXT,n" +
                        "t`"+COLUMN_RETAILPRICEPERPIECE    +"`tTEXT,n" +
                        "t`"+COLUMN_SERVICECHARGEPERPIECE  +"`tTEXT,n" +
                        "t`"+COLUMN_SPDSHOPPERPRICEPERPIECE+"`tTEXT,n" +
                        "t`"+COLUMN_JTAXPERCASE            +"`tTEXT,n" +
                        "t`"+COLUMN_SPDPRICEPERCASE        +"`tTEXT,n" +
                        "t`"+COLUMN_PRODUCTADDEDON         +"`tTEXT,n" +
                        "t`"+COLUMN_PRODUCTSTATUS          +"`tINTEGERn" +
                        ");";
    db.execSQL(queryProductsAllData);
    }
 @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
    {
        db.execSQL("DROP TABLE IF EXISTS "+TABLE_PRODUCTS);
}
`

这是我拿到的日志。

 12-28 10:27:52.509    2672-2672/? E/SQLiteLog﹕ (14) cannot open file at line 31278 of [2ef4f3a5b1]
12-28 10:27:52.509    2672-2672/? E/SQLiteLog﹕ (14) os_unix.c:31278: (24) open(/data/user/0/com.vergesystems.heartbeat/databases/Heart_Beat-journal) -
12-28 10:27:52.510    2672-2672/? E/SQLiteLog﹕ (14) cannot open file at line 31278 of [2ef4f3a5b1]
12-28 10:27:52.510    2672-2672/? E/SQLiteLog﹕ (14) os_unix.c:31278: (24) open(/data/user/0/com.vergesystems.heartbeat/databases/Heart_Beat-journal) -
12-28 10:27:52.510    2672-2672/? E/SQLiteLog﹕ (14) unable to open database file
12-28 10:27:52.512    2672-2672/? E/SQLiteDatabase﹕ Failed to open database '/data/user/0/com.vergesystems.heartbeat/databases/Heart_Beat'.
    android.database.sqlite.SQLiteCantOpenDatabaseException: unable to open database file (code 14): , while compiling: PRAGMA journal_mode
            at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
            at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:887)
            at android.database.sqlite.SQLiteConnection.executeForString(SQLiteConnection.java:632)
            at android.database.sqlite.SQLiteConnection.setJournalMode(SQLiteConnection.java:318)
            at android.database.sqlite.SQLiteConnection.setWalModeFromConfiguration(SQLiteConnection.java:292)
            at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:213)
            at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:191)
            at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
            at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
            at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
            at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:806)
            at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:791)
            at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
            at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:571)
            at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:269)
            at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:223)
            at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
            at com.vergesystems.databases.ProductsTableHelper.<init>(ProductsTableHelper.java:29)

Answer 1

我发现我的代码有什么问题。我在其他助手类的构造函数中初始化TableHelper类，然后再次调用DatabaseHelper的onCreate，使其锁定数据库。

从其他TableHelper的构造函数中删除了TableHelper初始化，并将其放在需要的方法中。

谢谢。

Answer 2

删除

context.openOrCreateDatabase(DATABASENAME, context.MODE_PRIVATE, null);

您使用的是SQLiteOpenHelper，它为您进行数据库文件管理。