Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication ?Android

Question

I updated my Android Studio to version 2.0. But I had a problem, I don\'t know why?

The important error info:

Unable to instantiate applicati

Answer 1

I had the same error.

I solved it by cleaning the project ( Build > Clean Project )

Answer 2

you can also add this into your gradle to prevent making dex on debug

debug {
    // dev utilizes minSDKVersion = 21 to allow the Android gradle plugin
    // to pre-dex each module and produce an APK that can be tested on
    // Android Lollipop without time consuming dex merging processes.
    minSdkVersion 21
}

Answer 3

I also got this error with Android 2.0 in stable channel.

What I did?
- I had an older version of the app already installed on the device (which was built using older version of the Studio) which I was trying to replace by running the newer app on device.
I just uninstalled the older version completely before running the new app and the trick worked.

Answer 4

If you are sharing your app then another solution is

go to Android Studio --> Build --> Build APK

A pop up will come with APK generated successfully. Show in Explorer will get you to the generated apk folder.

Answer 5

If you don't want to disable Instant Run, just do a project clean and rerun.

Answer 6

Just go to Android Studio menu - Build --> Rebuild Project.