adobeair：在本地保存数据片段

Posted 2021-02-25

Adobe AIR offers an ability to save small snippets of data locally (eg. users' settings). Works also on android. EncryptedLocalStore is stored encrypted using AES-CBC 128-bit method. It is not recommended to store more than 10 MB of data because of reading/decrypting speed of AIR.

// To save variable to ELS (EncryptedLocalStore)
var str:String = "Bob"; 
var bytes:ByteArray = new ByteArray(); 
bytes.writeUTFBytes(str); 
EncryptedLocalStore.setItem("firstName", bytes);
 
// Read it from ELS
var storedValue:ByteArray = EncryptedLocalStore.getItem("firstName"); 
trace(storedValue.readUTFBytes(storedValue.length)); // traces "Bob"
 
// Remove it from ELS
EncryptedLocalStore.removeItem("firstName"); 
 
// Remove EVERY data from ELS
EncryptedLocalStore.reset();