java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation getting while running test project?

Question

I have implemented project by using third party library(zxing) after implementation project is working fine then after I have written one test project to unit test my project.After running the test project ,the main project ,classes and it's methods are not giving any errors but if any zxing framework class is utilyzed within that method of the main project there getting the above error at run time not yet compile time.Please tell me how to resolve this issue?

score 33 · Answer 1 · edited Dec 15 '12 at 14:09

33

You are getting this error because of third party library reference added two times. You have added the application path in the build path of test project. so the library reference automatically added to test project". Remove any library reference in the test project under properties->android.

FYI, click here for detail explanation.

edited Dec 15 '12 at 14:09

Juri

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answered Nov 26 '12 at 10:45

Dasari

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score 11 · Answer 2 · answered May 15 '13 at 15:07

11

It is because zxing jar files are being loaded twice, You must set the zxing library as "Provided" (if you are compiling your code using Maven) in compile time, so it does not add the library to your bytecode. that way you wouldn't get the error

answered May 15 '13 at 15:07

Hossein Shahdoost

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score 9 · Answer 3 · answered Mar 04 '15 at 19:14

Unfortunately, the best solution which i have seen, it's to use a script with these code lines and using Espresso v2.0:

adb shell setprop dalvik.vm.dexopt-flags v=n,o=v
adb shell stop installd
adb shell start installd

Execute it before you begin to test. It's only necessary to do it once time.

score 6 · Answer 4 · answered Dec 05 '13 at 14:54

6

I changed test project setting in Intelij Idea. Go to Modules -> Dependencies, then set scope of the tested project to 'Provided'.

answered Dec 05 '13 at 14:54

Fedor

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People of the future: you now need to use `compileOnly`, as `provided` is deprecated. – Sakiboy Nov 17 '20 at 20:20

score 4 · Answer 5 · answered Sep 16 '14 at 13:09

I got this error because I was working with Guava and Espresso also contains Guava.

If you use Gradle and Android Studio you can exclude packages from the dependency like this:

androidTestCompile('com.jakewharton.espresso:espresso:1.1-r3') {
   exclude group: 'com.google.guava'
}

score 3 · Answer 6 · answered Feb 21 '14 at 14:44

3

Uncheck the jars (in my case maps and google play services jar) from "Order and Export" tab under Project's Java build path in Eclipse.But let them be added in "Libraries" tab. Click OK, Clean projects and build now. It works.

answered Feb 21 '14 at 14:44

user3167973

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score 2 · Answer 7 · answered Jan 25 '16 at 18:42

2

I have this error sometimes. Just the build->clean project helped me

answered Jan 25 '16 at 18:42

Volodymyr Machekhin

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score 2 · Answer 8 · answered Mar 01 '17 at 16:55

If you do not specifically need a device with low API version (<=19), you can leave transitive dependencies and create an emulator with higher API version.

This happens only on devices which API is lower than Lollipop (API 21). Running tests on emulators higher/equal to API 21 runs normally, without issues.

score 0 · Answer 9 · answered Dec 02 '19 at 12:49

0

I have this error on api level lower than 21. Just the build->rebuild project helped me.

answered Dec 02 '19 at 12:49

Cüneyt

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java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation getting while running test project?

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