CODEWITHSUNDEEP
javaandroidsharedpreferences
birdy
birdy

Reputation: 9636

how to set a shared preference

I am trying to set a shared preference but the below code results in false on both occasions.

I first get the value of the flag when it doesn't exist and expect a false. However, then I set the value to true and fetch the flag again and this time I expect true but it is still false.

    SharedPreferences sharedPref = getSharedPreferences("myapp",0);
    //fetch value when it does not exist
    Boolean mobileFlag = sharedPref.getBoolean("mobile_flag", false);
    Log.d("mobileFlag1", mobileFlag+"");
    //set the value
    SharedPreferences.Editor editor = sharedPref.edit();
    editor.putBoolean("mobile_flag",true);
    //fetch value when it has been set. 
    mobileFlag = sharedPref.getBoolean("mobile_flag", false);
    Log.d("mobileFlag2", mobileFlag+"");

both times the results of the log messages is:

D/mobileFlag1﹕ false
D/mobileFlag2﹕ false

Upvotes: 0

Views: 60

Answers (3)

Matt
Matt

Reputation: 3912

You need to commit your changes after you finish editing variables in your SharedPreferences.

editor.commit();

Upvotes: 2

Rohan Kandwal
Rohan Kandwal

Reputation: 9326

after using editor.putBoolean("mobile_flag",true); you need to put editor.commit(). This will save your sharedPreference otherwise nothing will be saved.

Upvotes: 1

tyczj
tyczj

Reputation: 73721

You didn't commit the new value

editor.putBoolean("mobile_flag",true).commit();

Upvotes: 3

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