1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
#include <string.h>
#include <jni.h>
#include <android/log.h>
#if 1 // Simple JNI Implementation
JNIEXPORT
jstring
JNICALL
Java_tk_oxore_NativeArmv6_DummyAct_helloJni(JNIEnv* env, jobject thiz)
{
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "Debug Log");
return (*env)->NewStringUTF(env, "Hello Form JNI");
}
#else // Alternative JNI imlementation
jstring
helloJni(JNIEnv* env, jobject thiz)
{
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "Debug Log");
return (*env)->NewStringUTF(env, "Hello Form JNI");
}
jint
JNI_OnLoad(JavaVM* vm, void* reserved)
{
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "Running JNI_OnLoad");
if (vm == NULL) {
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "vm == NULL");
return JNI_ERR;
}
JavaVMAttachArgs args;
args.version = JNI_VERSION_1_6; // choose your JNI version
args.name = NULL; // you might want to give the java thread a name
args.group = NULL; // you might want to assign the java thread to a ThreadGroup
JNIEnv* env;
if ((*vm)->AttachCurrentThread(vm, &env, &args) != JNI_OK) {
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "GetEnv != JNI_OK");
return JNI_ERR;
}
if (env == NULL) {
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "env == NULL");
return JNI_ERR;
}
if ((*env)->FindClass == NULL) {
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "No `FindClass` function provided");
return JNI_ERR;
}
// Find your class. JNI_OnLoad is called from the correct class loader context for this to work.
jclass c = (*env)->FindClass(env, "tk/oxore/NativeArmv6/DummyAct");
if (c == NULL) {
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "c == NULL");
return JNI_ERR;
}
// Register your class' native methods.
static const JNINativeMethod methods[] = {
{"helloJni", "()Ljava/lang/String;", (void*)&helloJni},
};
int rc = (*env)->RegisterNatives(env, c, methods, sizeof(methods)/sizeof(*methods));
if (rc != JNI_OK) {
__android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "rc != JNI_OK");
return rc;
}
return JNI_VERSION_1_6;
}
#endif
|
