Is it possible to store an Array into an EncryptedLocalStore item? AIR

问题

I want to save my Array's strucure and load it the next time I open my AIR application. Is there a way to store it to an EncryptedLocalStore item then get it later when I re-open the app?

回答1:

EncryptedLocalStore.setItem() method takes a byte array when storing contents. To store an array, just use ByteArray.writeObject() method (as described in http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/utils/ByteArray.html#writeObject()) to convert your Array to a ByteArray - and then persist the same to the ELS.

var array:Array = getArray();
var byteArray:ByteArray = new ByteArray();
byteArray.writeObject(array);
EncryptedLocalStore.setItem('somekey', byteArray);

Hope this helps.

Update: Added code to retrieve the array back.

var byteArray:ByteArray = EncryptedLocalStore.getItem('somekey');
var array:Array = byteArray.readObject() as Array;

Update: For custom classes.

In case you want to serialize your own custom classes to the ByteArray, you may have to call registerClassAlias() before writing the object to the ByteArray. For eg.

registerClassAlias("com.example.eg", ExampleClass);

回答2:

I have found that it is easiest to to serialize the Array to a string and then store that string in the ELS. Then when you pull it out deserialize it back into an Array.

来源：https://stackoverflow.com/questions/7610526/is-it-possible-to-store-an-array-into-an-encryptedlocalstore-item-air