Android equivalent of NSUserDefaults in iOS

Question

I'd like to save some simple data. On the iPhone, I can do it with NSUserDefaults in Objective-C.

What is the similar command here in Android?

I'm just saving a few variables, to be reused as long as the application is installed. I don't want to use a complicated database just to do that.

score 229 · Accepted Answer · edited Feb 14 '23 at 10:26

229

This is the most simple solution I've found:

//--Init
int myvar = 12;


//--SAVE Data
SharedPreferences preferences = context.getSharedPreferences("MyPreferences", Context.MODE_PRIVATE);  
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("var1", myvar);
editor.apply();


//--READ data       
myvar = preferences.getInt("var1", 0);

Where 'context' is the current context (e.g. in an activity subclass could be this).

edited Feb 14 '23 at 10:26

J. Doe

12,159
9
60
114

answered Aug 27 '10 at 14:17

christian Muller

5,016
6
34
44

this is the way to go for storing very simple things, its simple and straight to the point – smith324 Aug 27 '10 at 15:05
I fixed the error in the code (was calling the non-existent getPreferences, not getSharedPreferences). – Ben Clayton Oct 19 '12 at 14:08
17

Update 2015: Android recommends the use of apply() now over commit() because apply() operates on a background thread instead of storing the persistent data immediately and possible blocking the main thread. – AppsIntheParkNYC Jul 06 '15 at 11:02
Is there a way to access this SharedPreferences from jni code? – IgorGanapolsky Apr 12 '16 at 16:16
2

To get the 'context' from within `AppCompatActivity`, you can use `getApplicationContext()` – Brainware Jul 22 '16 at 23:13
An Activity *is* your context. So use 'this' as context in Activities. In Fragments you'll want to use requireActivity(). – Steffen Vangsgaard Feb 10 '23 at 10:22

Android equivalent of NSUserDefaults in iOS

1 Answers1

Linked