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I'm creating an Android app that can capture the internet traffic to analyze later. Through a VPN tunnel, I can get the packets in a byte[] array. Is it possible to create a pcpp::RawPacket in ...
lcpr_phoenix's user avatar
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1 vote
0 answers
324 views

Then my plugin, written in C, is loaded it makes an initial call to JNI_CreateJavaVM(). It seems to fail completely at random. Running it one time might fail but the next time it might succeed. It ...
Fabel's user avatar
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4 votes
2 answers
213 views

My Java application is installed to another application's "test area", resulting in longer absolute file paths than usual. I can load native libraries from a short file path: System.load(&...
Basilevs's user avatar
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5 votes
1 answer
74 views

I'm writing a demo Java app that interacts with libpq. For this, I'm using java.lang.foreing package. My problem is, I can easily pick up functions but not integer enum constants: System.load("...
Ivan Grishaev's user avatar
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0 votes
0 answers
46 views

I am developing an Android application using Qt 6 (C++) and trying to open the system camera and save the captured image to device storage. The camera app opens correctly, the photo is taken, but the ...
Anri's user avatar
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0 votes
0 answers
119 views

I’m seeing a native crash (SIGABRT) on arm64-v8a devices in a React Native Android app on Android 15 and 16. The crash originates from libfbjni.so while executing facebook::jni::JNativeRunnable::run()....
Mitesh Pithadiya's user avatar
  • 1
0 votes
0 answers
65 views

I am building a React Native (Android) application that connects to a Bluetooth LE fetal doppler device. The BLE connection works correctly and I receive live packets (0x71 command) that contain audio ...
Suraj Kumar's user avatar
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0 answers
79 views

I am not sure why this is happening so I am coming here to look for any sort of help I can get. Basically when recording any jack device such as firefox in my app it comes out as distorted. But it ...
HoosierTransfer's user avatar
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3 votes
0 answers
159 views

I have a Java application that calls a native function. That native function contains a loop, and in each iteration it launches 10 threads and waits for them to complete. Each thread performs a number ...
Daniel Junglas's user avatar
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6 votes
0 answers
473 views

In System.c, the JVM function corresponding to Java’s System.currentTimeMillis() is registered using RegisterNatives. In contrast, System.identityHashCode(Object) calls a JVM function directly based ...
YujiSoftware's user avatar
  • 1,777
0 votes
1 answer
79 views

gRPC service consistently fails with KVS Producer JNI “producer stream creation time out StatusCode: 0xf” about ~15s after “Creating Kinesis Video stream”. REST service (same repo, same JNI .so, same ...
OptimusPrime's user avatar
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3 votes
1 answer
145 views

I have an old Java JAR file that depends on .so files (shared object libraries). I understand .so files are native libraries (written in C/C++), and the JAR uses JNI (Java Native Interface) or JNA to ...
IronMan's user avatar
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0 answers
81 views

I'm trying to add the wasmtime c-api library to my app. But I'm getting the following error at runtime: java.lang.UnsatisfiedLinkError: dlopen failed: library "/Users/tufekoi/Repos/...
tufekoi's user avatar
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0 votes
0 answers
24 views

I am trying to integrate GStreamer via JNI into an existing Android Studio project. My Android.mk file looks like this: LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := rtsp-...
NotABot's user avatar
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0 votes
0 answers
104 views

I'm trying to use Cronet on Android directly from my JNI / C++ layer, not through the Java API. I already have the cronet.so (from Play Services / build output). What I'm missing are the headers (like ...
HARRSH BERMANN's user avatar
  • 1
2 votes
2 answers
576 views

I have a very large Android project with hundreds of 3rd party libraries. Some of those libraries have native .so libs inside then. I can see all .so files using Android Studio -> Analyze Apk... ...
Alexey's user avatar
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0 votes
0 answers
102 views

I have very little experience with c++ or java and I want to make an Android app with Unreal Engine 5.3, which can either scan or be opened by scanning a QR Code and do something with the Information ...
Logoiuy's user avatar
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0 votes
0 answers
153 views

Edit to describe the solution: during development, I was making changes to my path. If running java in a command prompt window, then that window must be closed and a new one opened to reflect changes ...
Tommy131313's user avatar
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0 votes
0 answers
117 views

I'm trying to call the function through the environment variable env, namely env->FindClass("android/os/BatteryManager"), but eventually the error F/libc (27883): Fatal signal 11 (...
Dmitry's user avatar
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3 votes
3 answers
202 views

I'm trying to handle EINTR error from POSIX connect call. I'm running on OSX this connect code: JNIEXPORT jint JNICALL Java_io_questdb_network_Net_connect (JNIEnv *e, jclass cl, jint fd, jlong ...
Alex des Pelagos's user avatar
  • 1,595
2 votes
1 answer
143 views

When working with JNI, can the native side obtain an _Atomic int32_t* given a Java AtomicInteger reference, and run C atomic functions on it (e.g. atomic_fetch_add)? We could call Java's methods (e.g. ...
anon's user avatar
  • 707
0 votes
0 answers
79 views

I use the following statement in unidbg to resolve a class from within an apk package: SampleClass = vm.resolveClass("path/to/class"); Then, I use the SampleClass.callStaticJniMethodObject() ...
Tiano Manti's user avatar
  • 131
0 votes
0 answers
80 views

I'm developing an Android app using Qt 6.9 that needs to scan WiFi networks. I've created a custom Java class to handle the WiFi scanning, but when I try to call it from C++ using QJniObject, I get a ...
kidtic's user avatar
  • 1
0 votes
1 answer
151 views

As mentioned above, I am using the PN532 reader to connect it with the application. Using the 'libnfc' as JNI library, I built the pn532_uart library as a shared library for 'Arm' based to use the ...
Wan Ammar's user avatar
  • 31
0 votes
1 answer
68 views

CMake is using JNI headers in /user/local/include and not the ones at $JAVA_HOME CMAKE File cmake_minimum_required(VERSION 3.24.0...3.31.1) cmake_policy(SET CMP0135 NEW) set(...
rkesters's user avatar
  • 128
0 votes
0 answers
89 views

I'm encountering a strange issue with my Android application. I'm receiving crash reports from the Play Console with the following error: Fatal Exception: java.lang.UnsatisfiedLinkError: dlopen failed:...
Ghost's user avatar
  • 96
0 votes
1 answer
206 views

My app is a game that consumes a native.so file and has a JNI layer. Whenever the OS kills my app (for example during an in-app update), I see this warning in logcat. What does it mean and how can I ...
Bungles's user avatar
  • 2,329
0 votes
1 answer
100 views

I am using the Rust jni crate, and currently have a native method defined. I am trying to figure out how I get a java field, which is a different class that I have also made, and interact with it ...
An1nterestingName's user avatar
  • 3
0 votes
0 answers
56 views

I'm try to exec Log.isLoggable after JNI_CreateJavaVM. Got the error as below with Android 14 and above. 01-02 11:35:15.704 24244 24244 F zygote64: runtime.cc:707] Pending exception java.lang....
Nelson's user avatar
  • 183
4 votes
2 answers
755 views

All examples I've come across for calling a Java method from C using the Foreign Function & Memory API involve callbacks, that is, a Java method that runs some native function with a Java callback ...
BCartolo's user avatar
  • 769
3 votes
1 answer
193 views

I have an Android app (written in Kotlin), with the processing code running in Rust. I'm using JNI (Java Native Interface) as communication layer. Goal I can successfully return a bool, but I want to ...
NumesSanguis's user avatar
  • 6,462
2 votes
0 answers
84 views

I have a Go method that returns 2 byte arrays and 2 strings defined as: // export GetDetails func GetDetails() (unsafe.Pointer, unsafe.Pointer, *C.char, *C.char) { ... return C.CBytes(arr1), C....
scottstots's user avatar
  • 344
0 votes
1 answer
87 views

I have an Android app (written in Kotlin), with the processing code running in Rust. I'm trying to send List<String> data to the Rust back-end and interpret it as a Vec<String>. The size ...
NumesSanguis's user avatar
  • 6,462
1 vote
0 answers
38 views

I am trying to pass some initialization values from jni to java. I have been able locate and correctly call the java method from my JNILib Init function but when I try to call it from a different ...
John Am's user avatar
  • 121
2 votes
1 answer
144 views

I have a graphical JavaFX application that is launching a secondary child process using Javaw.exe. Javaw.exe is chosen because I do not want a console window to be visible. After a short amount of ...
Jake Henry's user avatar
  • 357
-1 votes
1 answer
149 views

I'm working on a class project and about half of our group knows c++ and the other half only knows Java FX. Our project is a synthesizer, which involves a good amount of DSP and GUI stuff. I figured ...
Taylor's user avatar
  • 3
1 vote
0 answers
86 views

Running a Java program on a raspberry Pi 5.0 (64bit) under Open-JDK-17. I'm trying to get Bluetooth working (64bit) with the bluecove Java API. One of my shared libs libbluecove_aarch64.so does not ...
Quentin Meek's user avatar
  • 39
0 votes
0 answers
232 views

For some time I am trying to solve a bug in our native C++ shared library using traces but it is not easily reproducable (multithreading/networking involved). We have Android (Java) code instantiating ...
nikoladsp's user avatar
  • 155
0 votes
1 answer
174 views

Recently, I have been working on a small gui app that uses GTK4. This gui app uses a combination of Java and Rust (I am using the jni crate for interop). I am creating the Gui window using the Gtk-rs ...
Radon's user avatar
  • 126
0 votes
1 answer
55 views

I am using fmod library in my Android app to filter sound. There is a crash in GP console and I can't reproduce it on my device. Here is the backtrace: JNI DETECTED ERROR IN APPLICATION: java_object ==...
filipst's user avatar
  • 1,573
13 votes
2 answers
312 views

I think I've found a bug, but I'm not sure whether to blame the JVM, JNI, NASM, GCC, or ld. The bug causes my compiled modding language called grug (see this for videos and explanations) to ...
MyNameIsTrez's user avatar
  • 682
4 votes
1 answer
324 views

My goal is to catch SIGSEGV (infinite recursion), SIGALRM (infinite loops, raised by a timer), and SIGFPE (division by 0) from native code, since I want to prevent Minecraft (Java) from crashing or ...
MyNameIsTrez's user avatar
  • 682
0 votes
0 answers
47 views

I'm working on an Android app consisting of Kotlin (for the UI/UX) and C++ (app logic). I'm using JNI to bridge C++ to Kotlin. When a new thread is created, AttachCurrentThread is invoked to attach ...
NightFuryLxD's user avatar
  • 927
1 vote
0 answers
73 views

I have a program in jni (java native interface), which should display the text "hello world" in C #include "MyJavaClass.h" #include <jni.h> #include <stdio.h> // ...
Cabralito's user avatar
  • 23
0 votes
1 answer
97 views

I am working in Java on Windows OS. I’m using System.loadLibrary to load called A.dll, which exposes some JNI functions. A.dll depends on B.dll. I put A.dll and B.dll on a repo, told my colleague to ...
aniceempanada's user avatar
  • 1
0 votes
1 answer
127 views

I am developing a custom Gluon Attach plugin and encountering issues with passing a Java Runnable object from Java to JNI. Despite reviewing the Gluon Attach plugin source code (which unfortunately ...
CTO - Abid Maqbool's user avatar
  • 165
1 vote
0 answers
84 views

I have a C++ method : class classA { public: bool methodA(const char* a, const int b, char* c); } This is used in the C++ application as follows: int q = 5; char returnOutput[512] = "...
Shreyak Mysore Shamprasad's user avatar
  • 59
1 vote
1 answer
141 views

I have been trying to debug a non user perceivable crash in my app (I think it happens in the background) that originated from the Android Runtime due to possibly a deadlock/thread contention. ...
peakpeakt's user avatar
  • 67
1 vote
1 answer
116 views

Two doubts from JNI Design Overview docs: The JNI interface pointer is only valid in the current thread. A native method, therefore, must not pass the interface pointer from one thread to another. A ...
Jatin guglani's user avatar
  • 267
0 votes
0 answers
66 views

I have a Java program that uses a native DLL file. It works perfectly on my development machine but fails with a UnsatisfiedLinkError or a "file not found" error when I run it on another ...
Hannan Sani's user avatar
  • 1

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