./gradlew connectedVariantNameAndroidTest failed-CodePudding

At Android studio's terminal key in "./gradlew connectedVariantNameAndroidTest". Result with following error message:

Task :app:connectedDebugAndroidTest FAILED

FAILURE: Build failed with an exception.

What went wrong: Execution failed for task ':app:connectedDebugAndroidTest'.

com.android.builder.testing.api.DeviceException: No connected devices!

Why?

CodePudding user response：

com.android.builder.testing.api.DeviceException: No connected devices!

From error message, you should connect a device using usb or a virtual device.