Questions tagged [jbytearray]
7 questions
3
votes
0 answers
JNI C++ -> Java bitmap header info and bytes to jbytearray
I'm using JNI to pass an image from C++ to Java, im trying to send the bytes in a jbyteArray over to Java in byte[]. However I'm getting an error which has most likely have to do something with the size of the bytes being send.
I have tried int len…
MicroHat11
- 227
- 3
- 12
1
vote
1 answer
How to transfer encrypt data from c++ to java
I've a simple encryption program using JNI(JAVA , C++ .
Briefly :
I pass a simple string into c++ program.
C++ program encrypts that string for me and return cipher string.
I'll print ciphertext for a client.
Problem :
When I encrypt in c++ and…
Mehrdad HosseinNejad Yami
- 1,612
- 1
- 13
- 24
1
vote
1 answer
Sending jbyte array to Java method failed using JNI
Consider this java method:
public int write(byte[] src, int timeoutMillis) throws IOException {
System.out.println("Write function started.");
System.out.println("buffer = " + src.length);
System.out.println("buffer = " + src[0]);
…
a.toraby
- 3,232
- 5
- 41
- 73
0
votes
1 answer
How to convert ArrayList to vector for JNI?
I want to convert ArrayList in java to vector in c++. How can I do this?
Input: jobject input in c++, which is ArrayList in JAVA.
Output: class named vector in c++;
//Find jclass 4 ArrayList, just test jposCommits and jnegCommits are instances of…
Felix LL
- 133
- 4
0
votes
1 answer
I'm trying to modify a byte array and send it from c++ to java via the JNI
This is my function:
void FrameReceived(int width, int height, const char *rawImageBytes, int size, jboolean remote)
{
if(size == 0)
return;
jboolean isAttached;
JNIEnv *env;
jint jParticipant;
jint jWidth;
jint jHeight;
jbyte…
rosu alin
- 5,674
- 11
- 69
- 150
-1
votes
1 answer
How to write jbyteArray( or byte array) to txt file c++?
I have an image in a form that jbytearray in c++. I need to write it to txt file. I did many solutions on stackoverflow but none of them worked for me.
when I cast jbyteArray into char *, it is successfully write it, but i need to write it as a…
ozer
- 241
- 2
- 12
-1
votes
1 answer
Convert between unsigned char array to jbytearray and data loss
I want to convert unsigned char array to jbytearray and jbytearray to unsigned char array.
Here is what I want to do:
phase 1)
unsigned char data1[] to jbytearray in jni.
jbytearray to byte[] in java
base 64 encoding byte[] to String and save in…
oldman77
- 19
- 4