When I run instrumentation tests from within Android Studio, I see that the app remains on the device afterwards. But I can't figure out to do this from the command line with gradlew. My intention is to run tests that save screenshots in e.g /data/data/MyApp/cache/screenshots and download these with adb pull afterwards.
./gradlew connectedAndroidTest
causes the app to be uninstalled. I also tried
./gradlew connectedAndroidTest -x uninstallAndroidTest
but that didn't make any difference. What's causing the uninstallation, and how can I avoid it?
I solved this by letting gradle only build the apk, and then handling the install/test/uninstall work with adb. Here's an approximation of my script.
PKGNAME=com.corp.app
./gradlew assembleAndroidTest
adb install -r app/build/outputs/apk/app-debug.apk
adb install -r app/build/outputs/apk/app-debug-androidTest-unaligned.apk
adb shell am instrument -w ${PKGNAME}.test/android.support.test.runner.AndroidJUnitRunner
[ -d screenshots ] || mkdir screenshots
adb pull /data/data/${PKGNAME}/cache/screenshots screenshots
# Now we can uninstall.
adb uninstall ${PKGNAME}.test
adb uninstall ${PKGNAME}