'clear cache' from settings removes .so files in data directory

Question

My application is having native code so my data directory is having lib directory /data/data/mypackage/lib/libxxx.so

when I remove cache by 'clear cache' button in settings after swipe kill from recent list, sometimes it removes .so files keeping lib directory. (it happens in LG k10 with Android 7.0). It works well on first use before clearing cache while lib folder is having libxxx.so.

I load my lib by following code.

static {
        System.loadLibrary("xxx");
    }

after clearing cache and relaunch of application , it gives following error

java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/system/framework/com.google.android.maps.jar", zip file "/data/app/mypackage-1/base.apk"],nativeLibraryDirectories=[/data/app/mypackage-1/lib/arm, /system/fake-libs, /data/app/mypackage-1/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]]] couldn't find "libxxx.so"

The only option after this error is to reinstall the application as .so files are removed for unknown reason.

What can I do in such case?

Note : mypackage is package name of my app and libxxx.so is native lib. Original names I am hiding for some reasons.

Where have you put this line of code? `System.loadLibrary("xxx");` — Abhishek Jain, Jul 08 '17 at 10:30
Check if this directory still has the libxxx.so file. `/data/app/mypackage/lib/` — Abhishek Jain, Jul 08 '17 at 13:08
my device is not rooted. so is there any way to check that directory ? I cannot open it through adb shell or ddms. — MohK, Jul 10 '17 at 06:50
How did you check that files were removed from `/data/data/mypackage/lib/` directory? — Abhishek Jain, Jul 10 '17 at 06:52
You can test this on an emulator. You should be able to access these directories there. — Abhishek Jain, Jul 10 '17 at 06:53
on Emulator I am not getting this error. only in this LG device. — MohK, Jul 10 '17 at 06:55
try using `run-as -your.app.package-` when in adb shell, i dont have debugable application with native libraries, but it seams to show libs also — V-master, Jul 10 '17 at 07:03
yes I am using the same method but it's not allowing to go into /data/app directory — MohK, Jul 10 '17 at 07:16
and it is not possible to `ls lib`? `ls lib` gives me empty folder, where 'ls data/app-lib/package` gives me no such file error — V-master, Jul 10 '17 at 08:45
`ls lib` after run-as gives empty directory and `ls data/app-lib/package` not working for me — MohK, Jul 10 '17 at 09:20
I also have this problem, on android 7.1.1 emulator. When I clear data libs dir are empty — Andrzej, May 23 '18 at 05:57
this working for me: https://stackoverflow.com/questions/18111739/why-do-some-android-phones-cause-our-app-to-throw-an-java-lang-unsatisfiedlinker — Andrzej, May 23 '18 at 06:52
Thanx @Andrzej, you mean to say https://stackoverflow.com/a/24296556/1602333 this is working , right? — MohK, May 23 '18 at 10:33

'clear cache' from settings removes .so files in data directory

0 Answers0