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Editorial Team
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Asked: 2026-06-11T23:03:15+00:00

Platform: MonoDroid v4.2.4 IDE: Visual Studio 2012 Minimum SDK version: API 12 I’m having

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  • Platform: MonoDroid v4.2.4
  • IDE: Visual Studio 2012
  • Minimum SDK version: API 12

I’m having runtime issues when trying to utilize the LocalBroadcastManager class included in the Android.Support.v4.Content namespace. In my IDE, I’ve explicitly added the reference and can scope the namespace/class fine, and, after writing some code, compiles as expected. However, upon application deployment and launch, I’m prompted with the error: “NoClassDefFoundError: android/support/v4/content/LocalBroadcastManager”

Here’s the code that prompts the runtime error (DSC_Discconected_From_Device is a class that inherits from BroadcastReceiver). It stops execution at the last line. 

        IntentFilter filter = new IntentFilter(UsbManager.ActionUsbDeviceDetached);

        DSC_Disconnected_From_Device Receiver = new DSC_Disconnected_From_Device();

        LocalBroadcastManager.GetInstance(this).RegisterReceiver(Receiver, filter);

Under the SDK manager, all the API packages are installed, as well as the “Support Library” package under extras.

Where is it looking for the definition of the class? I’ve presumably copied the source, LocalBroadcastManager.java, to paths in the android-sdk framework where it “might” be looking. For example: ..\android-sdk\extras\android\support\v4\src\honeycomb\android\support\v4\content\LocalBroadcastManager.java

Ideas?

Edit: Forgot to mention that my project already references the support library, android-support-v4, in the folder “libs”, located in the root of my project. I had to create the directory and add it through Visual Studio.

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1 Answer

  1. Editorial Team

    The problem seems to be related to the “properties” of the android-support-v4.jar library.

    By default, the “Build Action” listed in the Advanced Properties in Visual Studio had a value of Content. I switched the value to AndroidJavaLibrary and the runtime error has disappeared.

    However, the BroadcastReceiver isn’t receiving the USB disconnect intent, hmm… Will update this answer accordingly.

    Edit: I could never get a LocalBroadcastReceiver to work, so I had to use a regular one.

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