how to know user has clicked the call and email send in android
<p>I have an app that allow to send email and phone another user. I would like to know how many people have really called and sent email to another users. However,when user click the button that in my app to call the people, and it will go to the standard android call page and same as the email. When it goes to another activity or even another app, I have no idea whether the user has click 'call/send' button or cancel button. </p>

<p>anybody know that how to know that if the user has really clicked on the call button ? </p>

<p>thanks a lot!</p>

<p>regards
justicepenny</p>
