Android 2.2 bt連線手機出現paired but not connected

可以與手機(sony erisson k510i) pair但是無法建立connection, 會出現paired but not connected

可以與耳機建立連線
與HBH-DS229可以連線. 連線成功後顯示 Connected to phone and media audio與WBS-802可以連線. 連線成功後顯示 Connected to phone and media audio

From http://source.android.com/porting/bluetooth.html
可以知道目前2.2版支援HFP的程度

• Handsfree Profile 1.5 in Audio Gateway role
• Three-way calling
• Phonebook over AT commands
• Volume synchronization
• eSCO
• Extensive bug fixes and compatibility improvements

From
http://www.bluetooth.com/English/Technology/Works/Pages/HFP.aspx

Getting Technical

The HFP defines two roles, that of an Audio Gateway (AG) and a Hands-Free unit (HF):

• Audio Gateway (AG) – This is the device that is the gateway of the audio, both for input and output, typically a mobile phone.
• Hands-Free Unit (HF) – This is the device acting as the Audio Gateway's remote audio input and output mechanism. It also provides some remote control means.

包含audio gateway(AG)以及控制端的HF兩個部份

所以應該是Hands-Free Unit的部份尚未實做 所以會得到paired but not connected的結果

Vincent說 3rd party會處理此部份

ps.
bluetooth profile應用的介紹
http://en.wikipedia.org/wiki/Bluetooth_profile
for Auron