title: Android C/C++ native calls Java APIs
body: <p>There are lots of examples that Android C/C++ native calls Java APIs.
  However, all of these examples I have read are the Android Java APIs call native
  first and then the native calls other Java APIs by using the passed JNI-ENV.</p>
  
  <p>Without the passed JNI-ENV, how can the C/C++ get it?
  Is it possible that C/C++ native calls Java APIs  without JNI-ENV?</p>
  
  <p>Can you give an example or a link for it if it is possible?</p>
  
  <p>Thanks!</p>