Measurement-computing DAQFlex for Android Quick Start Instrukcja Użytkownika Pobierz pdf (Strona 4)

Guidelines for developing a DAQFlex for Android project

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.

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Measurement-computing DAQFlex for Android Quick Start Instrukcja Użytkownika Strona 4