Android sqlite中判断某个表是不是存在方法

/**     * 判断某张表是否存在     * @param tabName 表名     * @return     */    public boolean tabbleIsExist(String tableName){            boolean result = false;            if(tableName == null){                    return false;            }            SQLiteDatabase db = null;            Cursor cursor = null;            try {                    db = this.getReadableDatabase();                    String sql = "select count(*) as c from Sqlite_master  where type ='table' and name ='"+tableName.trim()+"' ";                    cursor = db.rawQuery(sql, null);                    if(cursor.moveToNext()){                            int count = cursor.getInt(0);                            if(count>0){                                    result = true;                            }                    }                                } catch (Exception e) {                    // TODO: handle exception            }                            return result;    }