How to retrieve shared preferences into a non-activity class from an activity class in Android?

Question

I have a value in an activity class. I want to use that value in a non activity class. Normally, to share data between activity classes, I use like,

FirstActivityClass.java

SharedPreferences notification_id = getSharedPreferences("NOTIFICATION_ID", MODE_PRIVATE);
SharedPreferences.Editor notificationIDEditor = notification_id.edit();
notificationIDEditor.putString("notification_id", notificationId)                
notificationIDEditor.apply();

And to retrieve the value of notification_id in another class,

SecondActivityClass.java

SharedPreferences notificationIDSharedRetrieve = getSharedPreferences("NOTIFICATION_ID", MODE_PRIVATE);
notificationID = notificationIDSharedRetrieve .getString("notification_id", null);

But suppose the second class was a non-activity class, how can I retrieve the data in a non-activity class?

if `second class was a non-activity class` then pass Context to second class for accessing `getSharedPreferences ` method — ρяσѕρєя K, Jun 02 '16 at 08:03
Some syntax, or knowledge about methodology for this, would help. — harshvardhan, Jun 02 '16 at 08:03
Maybe [this](http://stackoverflow.com/questions/3549596/sharing-data-amongst-activities-and-services) helps — GAVD, Jun 02 '16 at 08:41

score 2 · Accepted Answer · answered Jun 02 '16 at 08:08

you can send your Activity context to your calss by creating a custom constructor for example:

class A
{
Context con;
public A(Context con)
    {
    this.con=con
    }
}



Activity B
{
Context con;
  @Override
  public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         this.con=getContext();
         A = new A(this.con);
    }
}

score 0 · Answer 2 · answered Jun 02 '16 at 08:50

0

You can cache the global Application context.

myApplicationContext.getSharedPreferences(NOTIFICATION_ID", MODE_PRIVATE)

answered Jun 02 '16 at 08:50

jackson.ke

29
5

How to retrieve shared preferences into a non-activity class from an activity class in Android?

2 Answers2