How to restore state after calling another activity? [closed]

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My android app is simple : a single activity contains a webview which shows user my website,in it I have a link which when user clicks on it ,the default sms program will be called.

That all works wel开发者_JAVA技巧l,but when I return from the sms ,It restarts the program(call the onCreate() method ) instead of returning to the origin state , how can I get back to the state before I turn to the sms program ?

Thanks :)

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