Android Studio: Application Installation Failed

Question

I\'ve been trying to learn how to use Android Studio but when I attempted to run one of the sample programs I get this error message:

Installation fai

Answer 1

This happens when your app is using any library and there is also an app installed in your device that is using the same library. Go to gradle and type:

android{
defaultConfig.applicationId="your package"
}

this will resolve your problem.