Enumerate Scanners

ENUMERATE_SCANNERS

Introduced in DataWedge 6.3.

Generates a numbered list (index) of scanners available on the device.

IMPORTANT: The scanner index is not fixed for all devices. It varies depending on the number of supported internal and/or external scanners installed and/or connected to the device at the time the index is generated.

Function Prototype

Intent i = new Intent();
i.setAction("com.symbol.datawedge.api.ACTION");
i.putExtra("com.symbol.datawedge.api.ENUMERATE_SCANNERS", "");

Parameters

ACTION [String]: "com.symbol.datawedge.api.ENUMERATE_SCANNERS"

Return Values

The enumerated list of scanners is returned via the broadcast intent com.symbol.datawedge.api.ACTION_ENUMERATEDSCANNERLIST. The list of scanners is returned as a string array (see below).

Bundle Extras

SCANNER_NAME [String]:

SCANNER_INDEX [String]:

SCANNER_CONNECTION_STATE [String]:

SCANNER_IDENTIFIER [String]: in each scanner info bundle for each scanner supported in the device (introduced in DataWedge 6.5). Both parameters are supported in DataWedge 6.6; the scanner identifier value takes precedence if an index also is referenced in the code.

Possible values:

• AUTO - Automatic scanner selection
• INTERNAL_IMAGER - Built-in imager scanner
• INTERNAL_LASER - Built-in laser scanner
• INTERNAL_CAMERA - Built-in camera scanner
• SERIAL_SSI - Pluggable Z-back scanner for ET50/ET55
• BLUETOOTH_SSI - RS507 Bluetooth scanner
• BLUETOOTH_RS6000 - RS6000 Bluetooth scanner
• BLUETOOTH_DS3678 - DS3678 Bluetooth scanner
• PLUGABLE_SSI - Serial SSI scanner RS429 (for use with WT6000)
• PLUGABLE_SSI_RS5000 - Serial SSI scanner RS5000 (for use with WT6000)
• USB_SSI_DS3608 - DS3608 pluggable USB scanner

Error and debug messages are logged to the Android logging system, which can be viewed and filtered by the logcat command. Use logcat from an ADB shell to view the log messages:

$ adb logcat -s DWAPI

Error messages are logged for invalid actions and parameters.

Example Code

Enumerate scanners

//
//  Call before sending the enumeration query
//
public void registerReciever(){
    IntentFilter filter = new IntentFilter();
    filter.addAction("com.symbol.datawedge.api.RESULT_ACTION");//RESULT_ACTION
    filter.addCategory(Intent.CATEGORY_DEFAULT);
    registerReceiver(enumeratingBroadcastReceiver, filter);
}
//
// Send the enumeration command to DataWedge
//
public void enumerateScanners(){
    Intent i = new Intent();
    i.setAction("com.symbol.datawedge.api.ACTION");
    i.putExtra("com.symbol.datawedge.api.ENUMERATE_SCANNERS", "");
    this.sendBroadcast(i);
}

public void unRegisterReciever(){
    unregisterReceiver(enumeratingBroadcastReceiver);
}

//
// Create broadcast receiver to receive the enumeration result
//
private BroadcastReceiver enumeratingBroadcastReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        Log.d(TAG, "Action: " + action);
        if(action.equals("com.symbol.datawedge.api.RESULT_ACTION")){
            //
            // enumerate scanners
            //
            if(intent.hasExtra("com.symbol.datawedge.api.RESULT_ENUMERATE_SCANNERS")) {
            ArrayList<Bundle> scannerList = (ArrayList<Bundle>) intent.getSerializableExtra("com.symbol.datawedge.api.RESULT_ENUMERATE_SCANNERS");
            if((scannerList != null) && (scannerList.size() > 0)) {
                for (Bundle bunb : scannerList){
                    String[] entry = new String[4];
                    entry[0] = bunb.getString("SCANNER_NAME");
                    entry[1] = bunb.getBoolean("SCANNER_CONNECTION_STATE")+"";
                    entry[2] = bunb.getInt("SCANNER_INDEX")+"";

                    entry[3] = bunb.getString("SCANNER_IDENTIFIER");

                    Log.d(TAG, "Scanner:" + entry[0]  + " Connection:" + entry[1] + " Index:" + entry[2] + " ID:" + entry[3]);
                    }
                }
            }
        }
    }
};

Get scanner details

// RESULT_ACTION_EXTRA_ENUMERATE_SCANNERS

if(intent.hasExtra("com.symbol.datawedge.api.RESULT_ENUMERATE_SCANNERS")) {
    Log.d(TAG, ">>> RESULT_ACTION_EXTRA_ENUMERATE_SCANNERS <<<");
    ArrayList<Bundle> scannerList = (ArrayList<Bundle>) intent.getSerializableExtra("com.symbol.datawedge.api.RESULT_ENUMERATE_SCANNERS");
    if((scannerList != null) && (scannerList.size() > 0)) {
        for ( Bundle bunb: scannerList) {

            String ScannerName = bunb.getString("SCANNER_NAME");
            int ScannerIndex = bunb.getInt("SCANNER_INDEX"));
            Boolean ScannerConnectionState = bunb.getBoolean("SCANNER_CONNECTION_STATE");
            String ScannerId = bunb.getString("SCANNER_IDENTIFIER");

        }
    }
}

Comments

The scanner and its parameters are set based on the currently active Profile.

---

SEE ALSO:

Zebra Support Central | Integrator Guides, Product Manuals, Software Downloads and Support

LaunchPad | Zebra Developer Community

Intent | Android Developers

Intents and Intent Filters | Android Developers

Android Intents | Tutorial