I have a non-rooted Sony Xperia running Android 4.3 and I have recently have bought a Belkin CarAudio Connect AUX with Bluetooth. It connects fine and it all works however it left me wanting more. Currently pressing the button on the CarAudio Connect pauses and plays the audio, a feature that I wish to keep. However, I was hoping that a double tab or a long press can do a Google voice search so I can call or text people (or find out important information like the height of the Eiffel Tower) while driving.
How would I set this up? I have tried 'Bluetooth Launch' from the Play store but it didn't do anything and I couldn't find any similar apps. I was thinking a Tasker task or a similar app but I don't know how to set it up or what action to look for.