[TIMOB-27186] Android: Getting error when calling the getDeviceList() using hyperloop

GitHub Issue	n/a
Type	Bug
Priority	None
Status	Open
Resolution	Unresolved
Affected Version/s	n/a
Fix Version/s	n/a
Components	Hyperloop
Labels	n/a
Reporter	Fazlul Haque
Assignee	Jan Vennemann
Created	2019-06-26T14:01:42.000+0000
Updated	2019-10-28T17:12:56.000+0000

Description

Hello, One of our customer is using android.hardware.usb.UsbManager.getDeviceList() to get a list of connected us devices. The code calls this OK, but the log shows the following error. ERROR] JNIUtil: !!! Unable to convert unknown Java object class 'android.hardware.usb.UsbDevice' to JS value !!! *The test code is:*

var AndroidAppPkg = require('android.app.*');
var Activity = AndroidAppPkg.Activity;
var Context = require('android.content.Context');

var Usb = require('android.hardware.usb.*');
var UsbManager = Usb.UsbManager;
var UsbDevice = require('android.hardware.usb.UsbDevice');

function init() {
Ti.API.info("actionRS232.init");
var activity = new Activity(Titanium.App.Android.getTopActivity());
var appContext = activity.getApplicationContext();
var obj = appContext.getSystemService(Context.USB_SERVICE);
var mgr = UsbManager.cast(obj);
var list = mgr.getDeviceList();

var devices = {};
for (var k in list) {
Ti.API.info(k + ": " + typeof list[k]);
}
}

init() being called from the Window onOpen event. *The output is:* [INFO] /dev/bus/usb/002/003: undefined *Test Environment:* SDK: 8.0.2.GA Hyperloop: 4.0.2 (Android) Testing on Tablet Android 7 Please let us know if you need any more information. Thanks

Comments

Andy Bingham 2019-06-28

Worth pointing out here that the error only occurs if you have a USB slave device attached to the android unit. I have replicated this on two tablets, one using an OTG cable from the single mini-usb port, the other has a separate full USB 2 port. The connected devices used were a USB gamepad and a USB to serial convertor (which is my actual use case here) If you need any more, do let me know Andy
Andy Bingham 2019-08-13

Is there any update on this issue? It has been a few weeks and is holding up a customer project, so is a priority for me. If nothing is likely to be done to help me, then I will have to look for another solution for the customer.

Michael Gangolf 2019-08-13

[~andybingham] do you need to use Hyperloop for this? You can always write a normal Android module and pass the date to your app e.g. using an event:

   	// Methods
   	@Kroll.method
   	public void getDeviceList()
   	{
   		manager = (UsbManager) activity.getSystemService(activity.USB_SERVICE);
   		deviceList = manager.getDeviceList();
   		Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
   		
   		HashMap listDevices = new HashMap();
   		
   		while (deviceIterator.hasNext()) {
   		   UsbDevice device = deviceIterator.next();
   		   listDevices.put("deviceId", device.getDeviceId());
   		   listDevices.put("name", device.getDeviceName());
   		   listDevices.put("class", device.getDeviceClass());
   		   listDevices.put("subclass", device.getDeviceSubclass());
   		   listDevices.put("vendorId", device.getVendorId());
   		   listDevices.put("productId", device.getProductId());
   		}
   		KrollDict kd = new KrollDict();
   		kd.put("devices", listDevices);
   		fireEvent("complete", kd);
   	}

Andy Bingham 2019-08-13

Michael, thanks for this, I guess you idea might work, but I have no experience with native code or module development, so had turned to hyperloop as it seemed to be a way to access the native library from titanium without having to do a module. If they cannot fix this issue, then I guess I will have to start to teach myself how to do this in a native module? Andy

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