Right-click on your project, then select android tools, then select Export signed application package. If you select the Unsigned Application Package, then you can change the apk name, but you cannot install it on an unsigned phone, as the CERTIFICATE error will appear. After choosing "Export signed application package" you will get the opportunity to sign your apk. Sign it with your existing default Android key. The key location is usually C / users / youruserid / .android / debug.store. "debug.store" is the key. The password for the key is "android". After that, in the next window, select the alias name from the drop-down list. This is the "androiddebugkey". The password for it is the same “android”. Then specify apk destination folder, specify your apk name and save it.