If you want to allow users to install an app offline, sending the APK file over bluetooth seems like a reasonable way forward. Regrettably, and without any real documentation the issue, some versions of Android block this. Perhaps it's anti-piracy.
APK receive over bluetooth was blocked on:
- Nexus 4 (Android 5)
- Nexus Galaxy (Android 4.3)
- Yoga Tablet 2 Pro (Android 5)
APK receive over bluetooth works fine on:
- Samsung SM-G313F (Android 4.4.2)
- Wileyfox Swift (Android 7.1)
- Moto E2 (Android 6)
The enable installation from unknown sources setting makes no difference. If receiving APK files are blocked on a device, no notification at all appears on the client device (thanks) when one is sent. The sender should receive a notification that sending failed. If sending an APK is blocked, the workaround is to send a zip file. There we are hoping that the phone has something capable of unzipping it. Most manufacturers install something for that, but stock Android has no file browser. You can get to a file manager through settings, storage, explore.
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