The Android NDK application with a native library (.so) is able to operate on the device but is not recognizable on the emulator.

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This can happen for various reasons, but most commonly it is because the emulator is not set up with the appropriate system libraries required by the native library.

To fix this issue, you can try the following steps:

1. Check that the emulator is running the correct system image that is compatible with the native library.

2. Make sure that the system libraries required by the native library are present in the emulator. You can check this by accessing the emulator using ADB (Android Debug Bridge) and then listing the libraries present in the system.

3. If the required libraries are not present in the emulator, you can try copying them manually to the emulator. To do this, you can first extract the library files from the device, and then push them to the emulator using ADB.

4. If none of the above steps work, you can try building a new emulator image that includes the required system libraries. You can also use a third-party emulator such as Genymotion, which has better support for native libraries.

In any case, it's important to make sure that your application works on both the emulator and the device, so you should test it on both platforms.