Android Studio and then created a simple app, but when I built the app into APK
'Build APK' and I installed it on my Android It brings up the message “App is not installed”, anyone knows why?
I think it is not the fault of Kotlin (or Kotlin plugin). I am recently developing Android apps with Kotlin and nothing wrong occurred so far.
The followings may cause such problem:
- In your android device has already installed an app with the same package (app id) but diffrent singture.
- In your android device has already installed an app with the same package (app id) but higher version code.
- Your device is not prepared for debuging with computer. (is Developer options turned on? is there any securety options?)
- The min api level is higher than your device’s (if you are using old devices)