android - A correct way to convert byte[] in java to unsigned char* in C++, and vice versa? -

i'm newbie in c++ , jni, try find correct way convert byte[] in java unsigned char* in c++ using jni, , vice versa ! (i'm working on android) after looking solution in google , so, haven't found details way convert byte[] in java c++. please me, , provide solution vice versa (unsigned char* in c++ byte[] in java). much

• byte[] in java unsigned char* in c++:

java :

private static native void nativereceivedatafromserver(byte[] value, int length); 

jni:

... (jnienv* env, jobject thiz, jbytearray array, jint array_length) {     ??? } 

ps: modified question being real question problem :(

you can use convert unsigned char array jbytearray

jbytearray as_byte_array(unsigned char* buf, int len) {     jbytearray array = env->newbytearray (len);     env->setbytearrayregion (array, 0, len, reinterpret_cast<jbyte*>(buf));     return array; } 

to convert other way around...

unsigned char* as_unsigned_char_array(jbytearray array) {     int len = env->getarraylength (array);     unsigned char* buf = new unsigned char[len];     env->getbytearrayregion (array, 0, len, reinterpret_cast<jbyte*>(buf));     return buf; }