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

android {
    buildTypes {
        debug {
            debuggable true
        }

and In the AndroidManifest.xml file, add android:debuggable="true" to the element.

https://developer.android.com/studio/run/device.html#setting-up

it works for me..