android - How can I know that the activity is return from system setting page? -

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the main activity :

public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     this.requestwindowfeature(window.feature_no_title);     setcontentview(r.layout.logo);      tools.checknetword(logoactivity.this);   }

when activity starts ,it check out there's availabe network

public static void checknetword(final context context) {     if (!tools.isnetworkavailabe(context)) {         new alertdialog.builder(context).seticon(r.drawable.hi).settitle(r.string.logo_dialog_title).setmessage(r.string.set_network)                 .setpositivebutton(r.string.ok, new dialoginterface.onclicklistener() {                     @override                     public void onclick(dialoginterface dialoginterface, int i) {                         //跳转到设置界面                         context.startactivity(new intent(settings.action_wireless_settings));                     }                 }).setnegativebutton(r.string.cancel, new dialoginterface.onclicklistener() {             @override             public void onclick(dialoginterface dialoginterface, int i) {                 ((activity)context).finish();             }         }).create().show();     } }

so user may click positive button ,and brougt system setting page. when reset network , click button. go activity. should do?that want go on check if network ok. use onrestart method? seems no work...

use method startactivityforresult(intent, int) , implement onactivityresult(int, int, intent) . read more here


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