Android JNI uses jnienv across threads

When you pass Env->callstaticvoidmethod to callback in JNI, you always hang up.

The reason is that jnienv is thread-dependent and can only be used in the corresponding created thread

The JVM is process-dependent and can be used by the JVM to get thread-related jnienv.

Initialize as follows

static void

Com_test_player_native_init (jnienv *env)

{

Jclass Clazz;

Clazz = Env->findclass ("Com/test/player");

if (clazz = = NULL) {

Return

}

Fields.post_event = Env->getstaticmethodid (Clazz, "postevent",

"(Ljava/lang/object;iiiljava/lang/object;) V");

if (fields.post_event = = NULL) {

Return

}

Set the virtual machine.

ENV->GETJAVAVM (& (FIELDS.PJVM));

}

Using env

void postevent (int msg)

{

JNIEnv *env;

Fields.pjvm->attachcurrentthread (&env, NULL);

Env->callstaticvoidmethod (MClass, fields.post_event, Mobject, msg);

Fields.pjvm->detachcurrentthread ();

}

Android JNI uses jnienv across threads