android數據庫被鎖定

我剛學習android和CRUD動作到SQLitedatabase中。它工作得很好。android數據庫被鎖定

我正確地重命名數據庫和表，然後我得到錯誤;

前：

public static String DBName = "Example"; 
public static String tableName = "Resource";

後：

public static String DBName = "FAEXPED"; 
public static String tableName = "Client";

我的課：

public class DBHelper extends SQLiteOpenHelper { 

    public SQLiteDatabase DB; 
    public String DBPath; 
    public static String DBName = "FAEXPED"; 
    public static final int version = '1'; 
    public static Context currentContext; 
    public static String tableName = "Client"; 

    public static final String KEY_CodeClient = "CodeClient"; 
    public static final String KEY_RsNom = "RaisonSocial"; 
    public static final String KEY_Ville = "Ville"; 
    public static final String KEY_Tel = "Tel"; 

    private static final String TAG = "Create_The_DB"; 

    private static final String TABLE_CREATE = "CREATE TABLE IF NOT EXISTS " + 
      tableName + " ("+ KEY_CodeClient + " VARCHAR PRIMARY KEY, "+ KEY_RsNom +" VARCHAR," + KEY_Ville + " VARCHAR,"+ KEY_Tel +" VARCHAR)"; 

    public DBHelper(Context context) { 
     //super(context, name, factory, version); 
     // TODO Auto-generated constructor stub 

     super(context, DBName, null, version); 
     currentContext = context; 
     DBPath = "/data/data/" + context.getPackageName() + "/databases"; 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     // TODO Auto-generated method stub 
     Log.w(TAG, TABLE_CREATE); 
     boolean dbExists = checkDbExists();  
     if (dbExists) { 
     // do nothing 

     } else { 
     DB = currentContext.openOrCreateDatabase(DBName, 0, null); 
     DB.execSQL(TABLE_CREATE); 
    } 

    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     // TODO Auto-generated method stub 
     Log.w(TAG, "Upgrading database from version " + oldVersion + " to " 
       + newVersion + ", which will destroy all old data"); 
       db.execSQL("DROP TABLE IF EXISTS " + TABLE_CREATE); 
       onCreate(db); 

    } 

    private boolean checkDbExists() { 
     SQLiteDatabase checkDB = null; 

     try { 
      String myPath = DBPath + DBName; 
      checkDB = SQLiteDatabase.openDatabase(myPath, null, 
        SQLiteDatabase.OPEN_READONLY); 

     } catch (SQLiteException e) { 
      // database does't exist yet. 
     } 

     if (checkDB != null) { 
      checkDB.close(); 
     } 

     return checkDB != null ? true : false; 
    } 


}

我thougt，當我重新命名它，它會爲我創建一個新的數據庫和新的桌子，是那個核心？

07-15 17:26:01.648: W/Create_The_DB(30510): CREATE TABLE IF NOT EXISTS Client (CodeClient VARCHAR PRIMARY KEY, RaisonSocial VARCHAR,Ville VARCHAR,Tel VARCHAR) 
07-15 17:26:01.648: E/SQLiteLog(30510): (14) cannot open file at line 30247 of [00bb9c9ce4] 
07-15 17:26:01.656: E/SQLiteLog(30510): (14) os_unix.c:30247: (2) open(/data/data/com.soft8.sql_test/databasesFAEXPED) - 
07-15 17:26:01.679: E/SQLiteDatabase(30510): Failed to open database '/data/data/com.soft8.sql_test/databasesFAEXPED'. 
07-15 17:26:01.679: E/SQLiteDatabase(30510): android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database 
07-15 17:26:01.679: E/SQLiteDatabase(30510): at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method) 
07-15 17:26:01.679: E/SQLiteDatabase(30510): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:279) 
07-15 17:26:01.679: E/SQLiteDatabase(30510): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:218) 
07-15 17:26:01.679: E/SQLiteDatabase(30510): at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:464) 
07-15 17:26:01.679: E/SQLiteDatabase(30510): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:186)

來源

2014-07-15 user609511

您是否嘗試將數據庫版本更新爲2？ – JDJ

您還將字符'1'存儲在'version'常量中，而不是整數1.您還應該使常量大寫。 – JDJ

這發生在我身上，在iOS上有些類似，嘗試在每次CRUD操作後關閉與數據庫的連接。並且提示，使用ORMLite對於Android上的Sqlite是一個很好的選擇。

來源

2014-07-15 15:48:03 Joseph

android數據庫被鎖定

回答

相關問題