How to get total coverage (Percentage of covered lines) during running Android app?

[Venelin Valkov]

Hi all,

I am interested in getting total coverage (or percentage) during running an Android application. I already managed to generate report after manual testing as described here:

http://curiousily.com/dev/2017/03/02/code-coverage-for-manual-android-testing.html 

However, the whole report is not really needed (at least not always). A number from 0 to 100, describing the current coverage, will be enough.

My understanding of JaCoCo is very limited. That said, I believe that the actual process of generating the final report is comprised of 3 steps:

1. Instrument app

2. Record ExecutionData

3. Using the ExecutionData and the class files generate final report

As roughly described here:

https://github.com/jacoco/jacoco/blob/master/org.jacoco.examples/src/org/jacoco/examples/CoreTutorial.java

So my question comes down to this:

Can I extract a rough estimate of the code coverage (number of executed lines and number of total lines) during the current session. If so, how?

Thanks for making JaCoCo!

Kind regards,

Venelin