I developed applications which use native code. All of a sudden those are not working, giving error "Unsatisfied link error: Couldn't load native library from loader dalvik.System.pathClassLoader, findLibrary returned null. I restarted adt twice. Still getting the same error. Applications which are not using native code, are working fine.
The error implies that the program is not able to find the shared libraries that you would have created.
Which devices did you try it on ?
You can check once if they are available in libs directory of your app . [/data/data/app_id/lib ]. Also check if armv7 support is required and if the directory is there in the libs , is .so present there.
Now it's working. I deleted all my virtual devices and then created a new one. However it's showing "skipped 264 frames. application may be doing too much work on main thread" many times and whenever we press a button, displaying this message in log "error loading /system/media/audio/ui/Effect_Tick.ogg"
thanks.
Related
My Android app is using 3rd party library that uses native libraries.
It is built with targetSdkVersion 21.
When running my app on Android 7 phones (in my example, LG G20), users start getting a visible error message upon process initialization.
The error message screenshot is attached.
When running the same app on Android 5.x and 6.x, there is no error shown to the user, although there is still a matching warning message in the log. Log message looks like:
library "/data/app/org.iotivity.base.examples.simpleclient-1/lib/arm/libocstack-jni.so" has invalid DT_NEEDED entry "./obj/local/armeabi/libocprovision.so"
ךibrary "/data/app/org.iotivity.base.examples.simpleclient-1/lib/arm/libocstack-jni.so" has invalid DT_NEEDED entry "./obj/local/armeabi/libocpmapi.so"
So it looks likes Android 7 "decides" to show to the end user a warning which is kept for the log only in previous versions.
I would appreciate:
1. Ideas on how the error message can be suppressed
2. Hints on what is the right solution for the issue (this is a 3rd party code, but I may try to tweak the build process)
Thanks in advance
Max
I am working with CsipSimple and try to create an account in local network...the build runs fine....but i can't make my account active....at the beginning of the project run it catches an exception java.lang.UnsatisfiedLinkError.......and it says unable to load native library...I have been searching all day long...i created armeabi-v7a under lib folder....and I have downloaded two .so file from firefox nightly build as descripted in this link.... here but i have same problem....please help me with this
Thrown when an attempt is made to invoke a native for which an implementation could not be found.
http://developer.android.com/reference/java/lang/UnsatisfiedLinkError.html
Please check this link https://stackoverflow.com/a/22121375/1761003
Please do post some code for better reply
I have a native application that always worked on Android KitKat with both Dalivik and ART runtimes, but it now crashes on Android L with the following trace:
E/art(12810): dlopen("/data/app-lib/com.mylib.example", RTLD_LAZY) failed: dlopen failed: cannot locate symbol "issetugid" referenced by "mylib.so"...
D/AndroidRuntime(12810): Shutting down VM
E/AndroidRuntime(12810): FATAL EXCEPTION: main
E/AndroidRuntime(12810): Process: com.mylib.example, PID: 12810
E/AndroidRuntime(12810): java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "issetugid" referenced by "mylib.so"...
E/AndroidRuntime(12810): at java.lang.Runtime.loadLibrary(Runtime.java:364)
E/AndroidRuntime(12810): at java.lang.System.loadLibrary(System.java:610)
Is ART runtime in Android L different from KitKat? There is no new NDK available yet, therefore, how to avoid this crash, because it seems that the function issetugid is no longer supported.
The issue has been fixed in the final Android 5.0 release. There is no need to re-compile existing binaries.
However, if the native lib is compiled with target android-21, it fails on previous Android versions (< 5.0)
I think i may have the answer, please correct me if iam wrong.I had faced similar issue and now its fixed (or i have found a workaround rather)
while registering native method to JNI, there are two ways of doing it.
1) Implement JNI_OnLoad() method in your .cpp file and register your native methods with the
appropriate classes.
Check- http://developer.android.com/training/articles/perf-jni.html#native_libraries
example - https://android.googlesource.com/platform/development/+/master/samples/SimpleJNI/jni/native.cpp
2) there is a particular naming convention to follow for the native methods, where the class path (including package) have to be added.
Check - http://docs.oracle.com/javase/6/docs/technotes/guides/jni/spec/design.html#wp615
Here we need not implement any method. The JVM discovers the native method from the symbol names it self from the binary.
The first method doesn't seem to work in Android ART runtime (ART is Optional in kitkat and it will be the only runtime in Lolipop).I am not not sure why it doesnt work. but i think the reason is because the way ART performs.(The bytecodes are converted and cached during install time itself instead of runtime, so that app runs faster). So since the native libs are not loaded (on_load is not called) the conversion to machine code fails at some point
Use the second method to register natives. it should work.
Only disadvantage is now your function names will be and long and will look horrible (i bet none of the function will fit in 100char limit).bye bye function name readability.
Hope this helps
Cheers,
Shrish
I have a wired issue. If i set up a folder called AndroidProjects and put my project in there... Android-Studio fails with gradle.
one error is:
IllegalStateException:
PsiFile not parsed for file D:/AndroidProjects/MyApplication/settings.gradle.
Wait until onPsiFileAvailable() is called.
sometimes it says that gradle has a fatal error....
if i set up my projectlocation to e.g. andropro everyting is working fine.
My thoughts:
may problems with 2 big letters in projectfoldername
may foldername is to long
may android or project are registered words in android-studio
Is there a knowen issue using foldernames like i did above?
couldn't find anything on the net.
The conversion of my Android application to the iPhone ObjectX environment as described in the XMLVM user manual works almost fine on my MAC, but I end up with 3 errors in the resulting XCode:
The first two errors simply relate to missing files, namely:
org_w3c_dom_Node.h
android_app_DatePickerDialog_OnDateSetListener.h
These are clearly not files from the converted Android application. Where can I get these from?
The third is an error that keeps coming up in the file
java_lang_String.h
The error message is:
typedef NSMutableString java_lang_String: redefinition as different kind of symbol
This error has been reported before in the XMLVM user group but as far as I know has never been answered sufficiently.
About the first error:
this is part of the Android API that has not yet been implemented.
This is the reason why it can't find the files.
Now, the second problem is not actually an error, but a warning and shouldn't stop you form compiling.
If it does, it means that in your project you have set the option to make errors from these types of warnings.
You can safely turn this off and completely ignore this warning.