Use the command adb install app-debug.apk reports an error: Failure [INSTALL_FAILED_TEST_ONLY: installPackageLI]

Solution:

1. Add the -t parameter: Enter the command adb install -t app-debug.apk

2. In the gradle.properties (project root or gradle global configuration directory ~/.gradle/) file add

android.injected.testOnly=false
Causes.

Android Studio 3.0 will automatically add the android:testOnly=”true” property to the application tag of the debug apk’s manifest file