Bluetooth Launch

来 Google Play 网购吧！购买内容之后，立刻就可以在您的 Android 手机或平板电脑上享用，摆脱一切同步烦恼。

Allows you to pick an activity to launch on when you use the Bluetooth button on most headsets.

This is no frills (some even call it ugly) but still works nicely. (Cut me some slack, I wrote it in 2 days, using standard UI elements from FroYo. That said, I see no reason to update it unless I'm really fixing something.)

Simply select the application to see a list of activities. Then pick the activity you want launched. For example:

Google Search

com.google.android.googlequicksearchbox.VoiceSearchActivity

That's it. Connect your headset, hit the button and you're good to go.

Notes:

Not all headsets work correctly. Some have odd behavior and do not follow the standard. I own only a couple of headsets and test to those.

Not all activities work correctly either. It is simply not possible for me to download and test every activity for every app. You are responsible for figuring out what works and what doesn't.