android - 在 Sqlite 中插入行很慢

Question

我正在尝试将行插入到 SQLite 数据库中。插入 130 行需要 7 秒，这对我来说似乎很慢。

表定义是:

    sd.execSQL("CREATE TABLE " + V2VocabsTable.TABLE_NAME + " (" 
            + V2VocabsTable.ID   + " VARCHAR(10) PRIMARY KEY ," 
            + V2VocabsTable.NAME    + " VARCHAR(255), " 
            + V2VocabsTable.LOADED  + " VARCHAR(1) " 
            + ");"
            );

要插入一行，我使用以下代码:

public void addTableStatus(String tableId, String name) {

    Log.d("DB","Before Insert");

    ContentValues cv = new ContentValues();
    cv.put(V2VocabsTable.ID, "Table " + tableId);
    cv.put(V2VocabsTable.NAME, name);
    cv.put(V2VocabsTable.LOADED, "NO");
    SQLiteDatabase sd = getWritableDatabase();
    long result = sd.insert(V2VocabsTable.TABLE_NAME,   null, cv);

    Log.d("DB","After Insert :: " + result);
    }

日志文件中的时间是:

 12-17 23:00:11.445: D/SQLDB(25384): Init
 12-17 23:00:11.455: D/DB(25384): Before Insert
 12-17 23:00:11.505: D/SQLDB(25384): Open
 12-17 23:00:11.895: D/DB(25384): After Insert :: 1
 12-17 23:00:11.895: D/DB(25384): 0001 :: AdministrativeSex-v1.0.xml
 12-17 23:00:11.895: D/DB(25384): Before Insert
 12-17 23:00:11.965: D/DB(25384): After Insert :: 2
 12-17 23:00:11.965: D/DB(25384): 0002 :: MaritalStatus-v1.0.xml
 12-17 23:00:11.965: D/DB(25384): Before Insert
 12-17 23:00:12.005: D/DB(25384): After Insert :: 3
 12-17 23:00:12.005: D/DB(25384): 0004 :: PatientClass-v1.0.xml
 12-17 23:00:12.005: D/DB(25384): Before Insert
 12-17 23:00:12.145: D/DB(25384): After Insert :: 4

 12-17 23:00:18.815: D/DB(25384): Before Insert
 12-17 23:00:18.865: D/DB(25384): After Insert :: 131
 12-17 23:00:18.865: D/DB(25384): ZU057 :: LocationHiding-v1.0.xml
 12-17 23:00:18.865: D/DB(25384): Before Insert
 12-17 23:00:18.925: D/DB(25384): After Insert :: 132

这对我来说似乎太慢了，是什么让它变慢了？

Answer 1

public DataBase openWithTrans() throws SQLException {
    ourHelper = new DataBaseHelper(ourContext, DATABASE_NAME,
            DATABASE_LOCATION);
    db = ourHelper.getWritableDatabase();
    db.beginTransaction();
    return this;
}

public void closeWithTrans() {
    try {

        db.setTransactionSuccessful();


    } catch (Exception e) {
        e.printStackTrace();
    }finally{

        db.endTransaction();
        Debug.debugMsg("end trans successful");
        db.close();
        Debug.debugMsg("close db successful");
        if (ourHelper != null) {
            ourHelper.close();
        }
    }

}

以上代码将使您能够进行交易。在交易模式下，您应该可以大大提高速度。正如评论所指出的，您开始交易然后插入您的 x 行然后关闭它。