cepr / android-serialport-api Goto Github PK

as title sad

java.io.IOException: Cannot run program "/system/bin/su": error=2, No such file or directory

from SerialPortFinder.java line 41

File dev = new File("/dev");

I always get null as result of dev

my log show:

type=1400 audit(0.0:49408): avc: denied { read } for name="/" dev="tmpfs" ino=4097 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:device:s0 tclass=dir permissive=0

What should I do?

Please add a readme to explain purpose and useage

https://gist.github.com/jxson/1784669

I am trying to build app using this code, I have already built an app using this but it is not receiving feedback from device. If anyone has written new code can someone share the link.

Hi,
I have implemented this in my app , but when I was reading , the received data was different from what is sent.
There is no encryption done on sender end , it is just sending as it is ( verified it with windows terminal program )

Here is the response details
Sent : 954605E6
Received : ceٲVVM

More conversions I tried:
Sent:
Hex: 57 53 52 54 48 53 69 54
Decimal: 39 35 34 36 30 35 45 36
Binary : 00111001 00110101 00110100 00110110 00110000 00110101 01000101 00110110

Received:
Hex: 99 101 217 178 86 86 77 3
Decimal: 63 65 d9 b2 56 56 4d 03
Binary : 01100011 01100101 11011001 10110010 01010110 01010110 01001101 00000011

I don't have experience with this kind of communications

NOTE : Communication is via UART cable , app running in a custom device (HOwen , Hero)

Thank you

jclass cFileDescriptor = env->FindClass("java/io/FileDescriptor");
jmethodID iFileDescriptor = env->GetMethodID(cFileDescriptor,"","()V");
jfieldID descriptorID = env->GetFieldID( cFileDescriptor, "descriptor", "I");
mFileDescription = env->NewObject(cFileDescriptor,iFileDescriptor);
env->SetIntField(mFileDescription,descriptorID,(jint)fd);

Android Studio 4.1.1 says "Class 'FileDescriptor' has no field named 'descriptor'. "

Could you generate a 64bit version of the .so ?

our application gets build with

abiFilters "armeabi", "armeabi-v7a", "arm64-v8a", "x86", "mips", "x86_64"

therefore for we need to have a 64 bit version.

I am trying to do serial communication using this code,
but is flow control impossible using sercd? I would like to know how to connect.

I want to do serial communication with cts/rts flowcontrol.

java.lang.UnsatisfiedLinkError: dlopen failed: /data/app/com.example.myapplication-2/lib/arm/libserial_port.so: has text relocations