Android : unable to enable bluetooth adapter

I am running an embedded system on android 2.1. The system has a开发者_StackOverflow社区 bluetooth chip. Calling getDefaultAdapter returns an adapter so BT is available however i'm not able to enable the adapter even when user gives permission.

I also tried using bluetoothadapter.enable() and its still not working.

I've tested the code on a phone and it works,

What could be going wrong?

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Do not use without explicit user action to turn on Bluetooth.

Bluetooth should never be enabled without direct user consent.

See the documentation.