Measurement Computing DAQFlex for Android Quick Start - Manual (Page 4)

Guidelines for developing a DAQFlex for Android project
4
This folder contains the file device_filter.xml , which the Android device uses to determine which USB
devices can be used by the application. An example file provides support for the USB-7202 and USB-7204 is
shown in Figure 3
Figure 3. device_filter.xml example projects
You can add any number of devices to this file to run with the software. The product IDs for each
DAQFlex-supported device are listed below.
DAQFlex device Product ID
USB-1208FS-Plus 232
USB-1408FS-Plus 233
USB-1608FS-Plus 234
USB-7202 242
USB-7204 240
USB-2001-TC 249
USB-2408 253
USB-2408-2AO 254
USB-1608G 272
USB-1608GX 273
USB-1608GX-2AO 274
USB-201 275
USB-204 276
Guidelines for developing a DAQFlex for Android project
Finding a DAQDevice
Call the DeviceManager getDevices() method to return a list of available DaqDevices . This list can then
be directly passed to an ArrayAdapter object for use in a spinner. Unlike the desktop version of DAQFlex, the
device serial number and ID is not available when running DAQFlex on an Android tablet. You must grant
permission for the device and open the device before requesting this information from the hardware.
Acquiring Permission
The Android API requires permission for every USB device. To acquire permission for the USB device, call the
DaqDevice requestPermission() method to open the Android USB Permission dialog box. The resulting
broadcast is handled in the standard way for USB devices on Android.
Refer to the example in the DeviceSelector class of the ExampleShared project.
Managing the Lifecycle
After the device has permission, but before you send any commands to the DaqDevice , call the open()
method to prepare the device to receive commands.