Question

I’m using SharedPreferences in my application to store the last User id who logged in in my application,and I’m trying to do that from non-activity class, which cause me a NullPointerException in the second line of code :

Context mContext;
SharedPreferences lastUser = PreferenceManager.getDefaultSharedPreferences(mContext);
SharedPreferences.Editor editor = lastUser.edit();

I’ve tried with every possible variation of mContext :

• Acticity.this.mContext;
• this.mContext.getApplicationContext();
• this.mContext;

but they didn’t solve my problem.
Can anybody give me some solution how to get rid of this problem and how to use Context in static way, without getting NullPointerException?

Answer 1

i think you had not initialize context of non Activity class, to get away through refer this Android saving data in Internal Storage NullPointerException