java - Android SharedPreferences from onclick in a fragment -

i hoping can give me direction on how access sharedpreferences within button's onclick event defined within onviewcreated event.

i can set values of interface within onviewcreated event calling:

sharedpreferences prefs = this.getactivity().getsharedpreferences(     "com.example.app", context.mode_private); 

and obtaining appropriate values, have button on interface pressed save changes , can't seem come proper way access sharedpreferences within button's click event:

button btn = (button)view.findviewbyid(r.id.btnsave); btn.setonclicklistener(new view.onclicklistener() {     public void onclick(view v) {         // perform action on click         log.d("test","here");         sharedpreferences prefs = this.getactivity().getsharedpreferences(                 "com.example.app", context.mode_private);      } }); 

this code doesn't work since here referring view , getactivity doesn't work view. can tell me how access activity here can access sharedpreferences?

hi there , welcome stackoverflow.

the reason why can't access sharedpreferences because this not fragment: if closer, you'll realize have 2 nested contexts, this onclicklistener object (that inside fragment).

when need access "parent context", this:

 public class mycoolfragment extends fragment {      // here "this" in fact fragment,     // this.getactivity().getsharedpreferences() exist      .     .     .      button btn = (button)findviewbyid(r.id.btnsave);     btn.setonclicklistener(new view.onclicklistener() {         public void onclick(view v) {              // perform action on click             // "this" no longer fragment, view.onclicklistener             // access parent context prepend class name:              // mycoolfragment.this.getactivity().getsharedpreferences work:               sharedpreferences prefs = mycoolfragment.this.getactivity().getsharedpreferences()                     "com.example.app", context.mode_private);          }     }); 

it typical in java have deeply-nested contexts, have tell java this want.

also, remember you can context view., inside click handler do:

        button btn = (button)view.findviewbyid(r.id.btnsave);         btn.setonclicklistener(new view.onclicklistener() {             public void onclick(view v) {                 // perform action on click                 activity myactivity=(activity)(v.getcontext()); // views have reference context                 sharedpreferences prefs =myactivity.getsharedpreferences(                         "com.example.app", context.mode_private);              }         }); 

hope helps !