android jacoco coverage empty with gradle

Question

I\'m trying to make jacoco create a code coverage report for my android test project. I have the following in build.gradle:

apply plugin: \'com.android.appli         


        

Answer 1

Sometimes due to some security restrictions on the underlying hardware you are unable to get coverage reports. In my case I was using android:sharedUserId="android.uid.system" and due to this it was not picking up any coverage and was giving me an empty file.

So I agree naran that you should try running it on different devices and make sure your app is not using android:sharedUserId="android.uid.system".

Answer 2

Jacoco should be inside of the android closure and the jacoco plugin declaration is not necessary:

apply plugin: 'com.android.application'
...
android {
    buildTypes {
        release {
        }
        debug {
            testCoverageEnabled true
        }
    }
    jacoco {
        toolVersion = "0.7.1.201405082137"
    }
}