Android Asynchronous Http Client (loopj) and the Persistent Cookie Store -

i new android development. had few questions on best way make libraries mentioned above work optimally.

currently, have 3 activities in app. mainactivity, loginactivity , homeactivity. app launches mainactivity supposed check if person logged in. if person logged in, redirect home, else redirect login.

as mentioned in documentation, created restclient class. can make request in loginactivity , response. code login.

public void login() {         requestparams params = new requestparams();         params.put(auth_parameter_email, memail);         params.put(auth_parameter_password, mpassword);          restclient.setcookiestore(new persistentcookiestore(this));         restclient.post(auth_url, params, new jsonhttpresponsehandler() {             @override             public void onfinish() {                 showprogress(false);             }              @override             public void onsuccess(jsonobject response) {                 string response_status = null;                 try {                     response_status = response.getstring(auth_response_status);                 } catch (jsonexception e) {                     toast.maketext(loginactivity.this,                             "error: " + e.tostring(), toast.length_long).show();                     log.e(tag, e.tostring());                 }                 if (response_status.equals(auth_success_status)) {                     finish();                 } else {                     mpasswordview                             .seterror(getstring(r.string.error_incorrect_password));                     mpasswordview.requestfocus();                 }             }              @override             public void onfailure(throwable e, string content) {                 toast.maketext(loginactivity.this, "error: " + e.tostring(),                         toast.length_long).show();                 log.e(tag, e.tostring());             }          });     } 

questions

1. this going create new cookie store each time request made. should put created once? should put in oncreate of mainactivity , assign global variable? best practice?
2. in mainactivity, how can check session cookie sent server? know in shared preferences, how can it? documentation doesnt variable stored under in sharedpreferences.
3. when need logout someone, delete shared preferences or erase cookie store or both? automatically kept in sync?
4. when app restarts, how initialise cookie store saved data in sharedpreferences?
5. if know of open-sourced code implements this, ill happy @ , answer these questions myself. provide link!

i realize level of understanding here low please bare me! :)

so here have done until now. works, not sure if best practice.

1) cookie store initialises sharedpreference. create new 1 each time need it. sure use same context each time. using getapplicationcontext()

2) , 4) cookie store handels you. create new 1 same context 1 created earlier. long consistent, cookies initialise properly.

3) cookie store keeps shared preferences , local attributes in sync call (new persistentcookiestore(getapplicationcontext())).clear();

my code

restclient.java

public static void setcookiestore(persistentcookiestore cookiestore) {     client.setcookiestore(cookiestore); } 

loginactivity.java

restclient.setcookiestore(new persistentcookiestore(getapplicationcontext())); 

mainactivity.java

private void loginrouter() {     persistentcookiestore mcookiestore = new persistentcookiestore(             getapplicationcontext());     list<cookie> cookies = mcookiestore.getcookies();     (cookie c : cookies) {         if (c.getname().equals("session")) {             startactivity(new intent(this, homeactivity.class));             finish();         }     }     launchsplashpage(); }