Android Question ioio service and open_accessory

[jimseng]

Hello all.
I am trying to get my head around usb_accessory and a ioio. (I have struggled for a couple of days to get the ioio otg to work but I have it working in my app using open_accessory.
I have a service that starts when a text message is received that tries to initialise a connection with a ioio board. The problem seems to be that the app starts before android asks to allow the app to access the accessory. Even when I check "use by default" it still asks every time.
I am rather new to this so if anybody has done something like this I would like to hear about it.
Basically my app doesn't connect to the device and quits.
Is it something to do with the AndroidManifest.xml?

 

[Erel]

Have you created a device filter file as explained here: https://www.b4x.com/android/forum/threads/usbserial-library-2-0-supports-more-devices.28176/#content

 

[jimseng]

Well I have tried but I don't really understand it.

 

[Erel]

Delete the xml file if you already added it and try this manifest editor code (requires B4A v5.8+):

AddActivityText(main, <intent-filter>
        <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
    </intent-filter>
    <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
        android:resource="@xml/device_filter" />)
CreateResource(xml, device_filter.xml, 
<resources>
<usb-accessory model="IOIO" />
</resources>
)