Problem debugging Android O (API 26)

cocokecocoke FRMember
edited October 2017 in Visual Studio

Hi, I've just update my OP3 on android O, and I'm facing a issue while I want to test my Xamarin Forms app:
The generation work, and I can install the APK with the command adb install -r
But if I want to debbug in Visual Studio I've got this error :

Failure [INSTALL_FAILED_ALREADY_EXISTS: Attempt to re-install Mono.Android.DebugRuntime without first uninstalling.]

Anyone have an idea ?


  • SpawnSPSpawnSP USMember


    I'm having the exact same problem here. OP3 with Android O. Same error message.
    Tried uninstalling Mono.Android.DebugRuntime using adb, but same result.

  • cocokecocoke FRMember

    I've downgrade this morning to OxygenOS Open Beta 24 (special version for downgrade) on Nougat, no more bug :)

  • Amit02Amit02 INMember ✭✭

    I followed these steps:

    1) Disabled the "Use Shared Runtime"
    Project> Properties > Android Options and disable Use Shared Runtime.

    2) Deleted bin and obj folder.

    3) Rebuild & Run.

    It is working fine for me on OP3t.

    Hope it will help you.


  • Thanks Amit02. The solution worked at my end.

  • DSMPDSMP Member

    Hello try install samsung driver:

    its helped me. Now, i dont must mannually uninstall app from my OP3 Oreo.

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