How to access android Shared preferences(using java) on the flutter end (using dart)?

Question

I have tried to many days but getting null value on flutter side.

I have shared the code. Please let me know is there anything wrong?

I also refer the link How to access flutter Shared preferences on the android end (using java) but it it exact opposite my requirements.

MainActivity.java

SharedPreferences  prefs = contextApplication.getSharedPreferences("preference", MODE_PRIVATE);
//save in shared prefs
prefs.edit().putString("hashMapEventsInBg_session", hashMapString).apply();

main.dart

 SharedPreferences  sp = await SharedPreferences.getInstance();
  var demosession = sp.getString("hashMapEventsInBg_session");

Josteve · Answer 1 · 2021-05-26T11:29:33.913

3

What you can do is:

1. Set the name in `getSharedPreferences` to `"FlutterSharedPreferences"`.

getSharedPreferences("FlutterSharedPreferences", MODE_PRIVATE)

2. Always prefix `"flutter."` in the key of any pair.

putString("flutter.test", "Hello")

Kotlin Code.

  val prefs: SharedPreferences = getSharedPreferences("FlutterSharedPreferences", MODE_PRIVATE)
  prefs.edit().putString("flutter.test", "Hello").apply()

3. Read the value like this in Flutter.

String test = (await SharedPreferences.getInstance()).getString("test"); //returns Hello.

edited May 26 '21 at 11:29

answered Jan 14 '21 at 14:53

Josteve

11,459
1
23
35

Hi , have updated the boolean value inside native code ,when I tried to retrive value from flutter side , I didn't get the updated value, please help – Anoop Mar 10 '21 at 08:17
Can you share the code in a new question and send the link? – Josteve Mar 10 '21 at 11:57
It is giving null value only. The above code is not working for me. Please help – Akshay Chopra Apr 07 '22 at 05:21

score 2 · Answer 2 · answered Mar 24 '21 at 12:50

if you use android java

on android side

 Map<String, String> data = yourdata;
 SharedPreferences preferences = this.getSharedPreferences("FlutterSharedPreferences",MODE_PRIVATE);
 JSONObject jsonObject = new JSONObject(message);
 String jsonString = jsonObject.toString();
 SharedPreferences.Editor editor = preferences.edit();
 editor.putString("flutter.msg",jsonString);
 editor.apply();

on flutter side

SharedPreferences preferences = await SharedPreferences.getInstance();
    if(preferences.containsKey('msg')){
       final message  =  preferences.getString('msg');
        Map data = json.decode(message);
         
    }

score 0 · Answer 3 · answered Jan 14 '21 at 12:17

Package for using shared preference in flutter : https://pub.dev/packages/shared_preferences

To understand more about using shared preference in flutter : https://medium.com/flutterdevs/using-sharedpreferences-in-flutter-251755f07127

https://flutter.dev/docs/cookbook/persistence/key-value

How to access android Shared preferences(using java) on the flutter end (using dart)?

3 Answers3

1. Set the name in getSharedPreferences to "FlutterSharedPreferences".

2. Always prefix "flutter." in the key of any pair.

Kotlin Code.

3. Read the value like this in Flutter.

1. Set the name in `getSharedPreferences` to `"FlutterSharedPreferences"`.

2. Always prefix `"flutter."` in the key of any pair.