Android的SQLite創建數據庫錯誤

我是新手與android sqlite數據庫。現在我只是嘗試創建自定義數據庫管理器，並且在oncreate（）函數中出現錯誤。我已經花了3天的時間弄清楚了，但不幸的是我仍然陷入了困境。任何輝煌的想法將不勝感激。Android的SQLite創建數據庫錯誤

public class DBManager extends SQLiteOpenHelper { 
private SQLiteDatabase db; 
private static Context myContext; 
public static final String DB_NAME = "goldenland.db"; 
public static final String TB_CAT = "tbl_categories"; 
public static final String TB_ARTICLE = "tbl_articles"; 
public static final String TB_SUBCAT = "tbl_subcategories"; 
public static final String TB_SCHEDULE = "tbl_schedule"; 
public static final String TB_CONTENT = "tbl_contents"; 
public static final String TB_CITY = "tbl_cities"; 
public static final String name = "name"; 
public static String DB_PATH = "/data/data/com.gokiri.goldenland/databases/"; 

public DBManager(Context context) { 
    super(context, DB_NAME, null, 1); 
    DBManager.myContext = context; 
} 

public void createDataBase() throws IOException { 
    boolean dbExit = checkDataBase(); 

    if (dbExit) { 
     System.out.println("Testing"); 
    } else { 
     this.getReadableDatabase(); 

     try { 
      copyDataBase(); 

     } catch (IOException e) { 
      throw new RuntimeException(e.getMessage()); 

     } 
    } 
} 

private boolean checkDataBase() { 
    SQLiteDatabase checkDb = null; 

    try { 
     String myPath = DB_PATH + DB_NAME; 

     checkDb = SQLiteDatabase.openDatabase(myPath, null, 
       SQLiteDatabase.OPEN_READWRITE); 
    } catch (SQLException e) { 

    } 

    if (checkDb != null) { 
     checkDb.close(); 
    } 
    return checkDb != null ? true : false; 
} 

public void copyDataBase() throws IOException { 

    InputStream myInput = myContext.getAssets().open("goldenland_2.sqlite"); 

    String outFileName = DB_PATH + DB_NAME; 
    OutputStream myOutput = new FileOutputStream(outFileName); 

    byte[] buffer = new byte[1024]; 
    int length; 
    while ((length = myInput.read(buffer)) > 0) { 
     myOutput.write(buffer, 0, length); 
    } 
    myOutput.flush(); 
    myOutput.close(); 
    myInput.close(); 
} 

public void openDatabase() throws SQLiteException { 

    String myPath = DB_PATH + DB_NAME; 
    db = SQLiteDatabase.openDatabase(myPath, null, 
      SQLiteDatabase.OPEN_READWRITE); 

}

Error Log Cat