title: create a permissions to restrict third party apps calling an activity android
body: <p>I am having two android apps signed with same certificate. Also i am using the activity of one app in other android app by specifying a name in "intent-filter" tag. But because of "intent-filter" tag any third party app can call my activity.</p>
  
  <p>Since both the apps are having the same certificates signed, can i restrict other apps calling my activity by providing some permisions? Any suggestions on this would be helpful to me.</p>
  
  <p>-Ron...</p>