Application Installation Failed in Android Studio

Question

Yesterday my app was running perfect from Android Studio but today when I started working on my app and running it i am getting error message continuously

Answer 1

I had the same issue in Android studio 2.3 when I tried to test the app using Xiaomi's Mi5 and Mi4 phones. Disabling instant run didn't help me. So here is what I did.

Turn Off MIUI optimization in the Developer Options in the phone.

Then the device will be rebooted and then you'll be able to test the app over the phone.

Using this method you can still use instant run option in android studio. So this will fix your problem at least temporary. Hope that we'll be able to use MIUI optimization in the near future updates :)