转换字节[]在Java中的无符号的char *在C ++中,反之亦然正确的方法是什么? [英] A correct way to convert byte[] in java to unsigned char* in C++, and vice versa?
问题描述
我是新手C ++和JNI,我试图找到在Java字节[]转换为无符号的char *在C ++中使用JNI一个正确的方法,反之亦然! (我工作的机器人) 经过寻找在谷歌的解决方案和SO,我还没有找到一个很好的细节的方式转换成字节[]在Java和C ++。请帮助我,并提供一个相反的解决方案(无符号字符* C ++中为byte []在Java)。非常感谢
I'm newbie in C++ and JNI, I try to find a correct way to convert byte[] in java to unsigned char* in C++ by using JNI, and vice versa ! (I'm working on android) After looking for a solution in google and SO, I haven't found a good details way to convert byte[] in java to C++. Please help me, and provide a solution for a vice versa (unsigned char* in C++ to byte[] in java). Thanks very much
- 字节[]在Java中的无符号的char *在C:
JAVA:
private static native void nativeReceiveDataFromServer(byte[] value, int length);
JNI:
... (JNIEnv* env, jobject thiz, jbyteArray array, jint array_length)
{
???
}
PS:我修改我的问题的是我的问题一个真正的问题:(
PS: I modified my question for being a real question for my problem :(
推荐答案
您可以使用此转换无符号的字符
阵列成 jbyteArray
You can use this to convert unsigned char
array into a 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;
}
到周围的其他方法转换...
to convert the 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;
}
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