java - passing EditText content by SharedPreference -

in application have 2 activities , want type url address in edittext of settingsactivity , use in mainactivity can't ...

this settingsactivity :

 public class settingsactivity extends activity {  switch aswitch; edittext edittext; string url_endpoint;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_settings);      edittext = (edittext) findviewbyid(r.id.etend);     sharedpreferences sp = getsharedpreferences("edittext", activity.mode_private);     sharedpreferences.editor edt = sp.edit();     string urlvalue = edittext.gettext().tostring();     edt.putstring("url", urlvalue);     edt.commit();     edittext.settext(sp.getstring("url" , urlvalue)); } 

and mainactivity :

 public class mainactivity extends activity {   string url_endpoint;    @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_monitoring);       //get url endpoint settingsactivity     sharedpreferences sp = getsharedpreferences("edittext", activity.mode_private);     string url = sp.getstring("url", "");     url_endpoint = url; 

first, have @ android's lifecycle

now, said, oncreate method called once when activity created, can see in picture.

for reason, getting text of edittext in oncreate method result in empty text (if not pre-populated).

since think want create settings activity set stuffs mainactivity, have 2 ways achieving goal:

1. you can add "save" button. reccomend since user might input , change mind, , way clicking "back" cancel operation.
2. you can save edittext value @ onpause of settingsactivity. method override value every time user exits activity no matter what.

note: remember popolate text of settingsactivity in oncreate/onresume, or empty.

also point that, can see in picture, once come settings activity oncreate not called again. have, in onresume method, take value sharedpreference , put in mainactivity's textview.

first, reccomend study lifecycle because it's core information programming android.