Thanks, for your answer but I try that with same result.
java.lang.UnsatisfiedLinkError: Couldn't load libserial_port from loader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/net.nowyouseeme.newprinter-2.apk"],nativeLibraryDirectories=[/data/app-lib/net.nowyouseeme.newprinter-2, /vendor/lib, /system/lib]]]: findLibrary returned null
unfiltered logs
Trying to load lib libjavacore.so 0x0
Added shared lib libjavacore.so 0x0
Trying to load lib libnativehelper.so 0x0
Added shared lib libnativehelper.so 0x0
No JNI_OnLoad found in libnativehelper.so 0x0, skipping init
Note: class Landroid/app/ActivityManagerNative; has 179 unimplemented (abstract) methods
Calling main entry com.android.commands.pm.Pm
No content provider found for permission revoke: file:///data/local/tmp/PrinterTest.apk
No content provider found for permission revoke: file:///data/local/tmp/PrinterTest.apk
Copying native libraries to /data/app-lib/vmdl-1293422886
Force stopping net.nowyouseeme.newprinter appid=10086 user=-1: uninstall pkg
Killing 9008:net.nowyouseeme.newprinter/u0a86 (adj 9): stop net.nowyouseeme.newprinter
Scheduling restart of crashed service net.nowyouseeme.newprinter/.starter in 1000ms
Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@424c3ce0 attribute=null, token = android.os.BinderProxy@4216b708
WIN DEATH: Window{420553d8 u0 net.nowyouseeme.newprinter/net.nowyouseeme.newprinter.main}
Package net.nowyouseeme.newprinter codePath changed from /data/app/net.nowyouseeme.newprinter-2.apk to /data/app/net.nowyouseeme.newprinter-1.apk; Retaining data and using new
Read Node State Ok
Read Node State Ok