how to use shared preferences in android.... i am a beginner so help me -

i beginner of android.. in designing android app.. don't know shared preferences.. first time have use shared preferences,. 1 can in code can implement. follwoing code , please make changes in code: tell me how save values onclick of button m storing in different variable temporaryliy.

import android.app.activity; import android.content.intent; import android.os.bundle; import android.view.view; import android.view.window; import android.view.windowmanager; import android.widget.button; import android.widget.edittext; import android.widget.toast;  public class newpage extends activity {     string un = null;     string pass= null;     string fname= null;     string lname= null;     string age= null;     string city= null;     string coun= null;     string email= null;     string pno= null;     string repass= null;      @override     protected void oncreate(bundle savedinstancestate){     super.oncreate(savedinstancestate);       requestwindowfeature(window.feature_no_title);     this.getwindow().setflags(windowmanager.layoutparams.flag_fullscreen,            windowmanager.layoutparams.flag_fullscreen);              setcontentview(r.layout.create_acc);              final button b = (button) findviewbyid(r.id.button3);              b.setonclicklistener(new view.onclicklistener() {                  public void onclick(view v) {                       intent = new intent(newpage.this, signin.class);                         i.addflags(                         intent.flag_activity_clear_top |                         intent.flag_activity_new_task);                                          startactivity(i);                  }              });               final button c = (button) findviewbyid(r.id.button2);              c.setonclicklistener(new view.onclicklistener() {                  public void onclick(view v) {                       intent = new intent(newpage.this, createacc.class);                     i.addflags(                         intent.flag_activity_clear_top |                         intent.flag_activity_new_task);                         startactivity(i);                      }              });               final button = (button) findviewbyid(r.id.button1);              a.setonclicklistener(new view.onclicklistener() {                      @suppresslint("showtoast")                     public void onclick(view v){                          edittext input1= (edittext)findviewbyid(r.id.fname1);                          fname = input1.geteditabletext().tostring();                          edittext input2= (edittext) findviewbyid(r.id.lname1);                          lname = input2.geteditabletext().tostring();                          edittext input3= (edittext) findviewbyid(r.id.age1);                          age = input3.geteditabletext().tostring();                          edittext input4= (edittext) findviewbyid(r.id.city1);                          city = input4.geteditabletext().tostring();                          edittext input5= (edittext) findviewbyid(r.id.country1);                           coun = input5.geteditabletext().tostring();                          edittext input6= (edittext) findviewbyid(r.id.email1);                          email = input6.geteditabletext().tostring();                          edittext input7= (edittext) findviewbyid(r.id.pno1);                           pno = input7.geteditabletext().tostring();                          edittext input8= (edittext) findviewbyid(r.id.uname1);                         un = input8.geteditabletext().tostring();                          edittext input9= (edittext) findviewbyid(r.id.passwd1);                         pass = input9.geteditabletext().tostring();                          edittext input10= (edittext) findviewbyid(r.id.repass1);                           repass = input10.geteditabletext().tostring();                          if((fname!=null) && (lname!=null) && (age!=null) && (city!=null) && (coun!=null) && (email!=null) && (pno!=null) && (un!=null) && (pass!=null) && (repass!=null))                            {                                if(pass == repass)                             {                                 toast.maketext(newpage.this, ".....data saved....." ,toast.length_long).show();                                 intent in = new intent(newpage.this, signin.class);                                     in.addflags(                                     intent.flag_activity_clear_top |                                     intent.flag_activity_new_task);                                     startactivity(in);                             }                             else                             {                                 toast.maketext(newpage.this, ".....password doesn't match....." ,toast.length_long).show();                             }                                            }                         else                         {                         toast.maketext(newpage.this, ".....complete form please....." ,toast.length_long).show();                         }                   }              });                 } } 

to read or write sharedpreferences first need sharedpreferences

sharedpreferences prefs = getsharedpreferences(tag, context.mode_private); 

once have sharedpreferences can write them

prefs.edit().putstring(key, value).commit(); 

or can read them

prefs.getstring(key, value); 

that's pretty it. tag in preferences name you're going call sharedpreferences - can string. saved key value pair. need figure out goes in code since have no idea you're trying store.