Android仪器测试由于RenderScript而失败

Question

I am building some ui tests with Espresso and everything works fine until I access a view in the application where RenderScript is used to blur an image.

The test fails with the error:

java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation

From what I googled it seems this happens because there are 2 instances of the same class in the test application, and the majority of solutions hint that the problem may be the guava library added twice. But this is not my case, as it fails very clearly on a line of code where RenderScript is instantiated.

Have you experienced something similar? I would appreciate any guidance.

Answer 1

OK, so I used a little hack to fix this problem.

The hack is to have a flag class (can be empty) in androidTest->java->com (location is not particular but is important to be part of androidTest ).

Something like this:

public class TestsRunningFlag {
}

Then have an utility method that checks if that class can be loaded.

    /**
     * A hacky way to determine whether the application is running normally,
     * or as part of an instrumentation test.
     */
    public static boolean isTestMode(Context context) {
        boolean result;
        try {
            context.getClassLoader().loadClass("com.TestsRunningFlag");
            result = true;
        } catch (final Exception e) {
            result = false;
        }
        return result;
    }

And then based on whether I am in test mode or not, I use RenderScript to process the image or not.