android adb INSTALL_FAILED_TEST_ONLY

转载http://blog.sina.com.cn/s/blog_6cbd24890102x0ki.html

Note: The Run button builds an APK with testOnly="true", which means the APK can only be installed via adb (which Android Studio uses). If you want a debuggable APK that people can install without adb, select your debug variant and click Build > Build APK(s).

也就是说，只要在AndroidStudio3.0内，点击绿三角运行Run，跑出来的apk，一定是TEST_ONLY的。

给第三方安装的apk，不能直接用Run出来的了，必须跑一下Build Apks。