问题
I am in dev mode and have no ADB access to android 2.1 tablet. I want to just transfer quickly unsigned app to downloads and install. However installer always says Application not installed without giving reason. So I need to know how to get installer to accept an unsigned app. signed app installs fine, and I do have Unknown Sources Checked under applications.
回答1:
Go to following
Settings -> Application Settings -> check Unknown Sources.
To install the apk from command prompt you need to follow following command adb install [file].apk
as per my experience, you installing an unsigned apk from this command is not possible and the only way to install unsigned apk is from running the application from eclipse by right clicking the project and select run and than run an android application.
来源：https://stackoverflow.com/questions/5347804/how-to-get-system-installer-on-tablet-to-accept-unsigned-app