A reliable way to get jnienv* in the NDK

When using the NDK, almost any method requires a jnienv to invoke. This class is thread-dependent, how can you reliably get it?

First of all, as the NDK so, there must be a place called by the Android system, this call will bring a jnienv parameter, do not use it, but call:

JNIENV->GETJAVAVM (&G_JAVAVM);

Gets a JAVAVM type variable.

Then call when you need to use jnienv.

    int status;    jnienv* _jnienv = NULL;    Status = G_javavm->getenv (void * *) &_jnienv, jni_version_1_6);        if (Status < 0)    {        status = G_javavm->attachcurrentthread (&_jnienv, NULL);        if (Status < 0)        {            _jnienv = NULL;        }    }

Can reliably get the jnienv.

A reliable way to get jnienv* in the NDK