JNI|在子线程中获得JNIEnv|AttachCurrentThread

void Call_Back_Invoke( void *user,int notify_id, unsigned int param )
{
	bool  isAttacked = false;
	JNIEnv* env;
	if(NULL == jni_tmpc.g_JVM)
	{
		LOGE("g_JVM == NULL");
		return ;
	}
	int status = (jni_tmpc.g_JVM)->GetEnv((void **) &env, jni_tmpc.g_JNI_VERSION);

	if(status < 0) {
		LOGD("callback_handler:failed to get JNI environment assuming native thread"); 
		status = jni_tmpc.g_JVM->AttachCurrentThread(&env, NULL);
		if(status < 0) {
		   LOGE("callback_handler: failed to attach current thread");
		    return;
		}
		isAttacked = true;
	}

	switch( notify_id )
    {
   	case...
		 ...
    }	
	if(isAttacked) 
	{
		(jni_tmpc.g_JVM)->DetachCurrentThread();
	}	
	LOGE("jni Call_Back_Invoke(1) notify_id = %d",notify_id );
}