Intent Output

DataWedge 6.6

Overview

Intent Output sends the processed data to the associated foreground application as payload within an Android intent. This allows acquired data to be passed programmatically to an application, where it can be consumed or further processed. The core components of an application (its activities, services and broadcast receivers) also can be activated by intents.

An intent object is a bundle of information that describes a desired action. It includes the data to be acted upon, the category of component that should perform the action and other pertinent data and/or instructions. When an intent is initiated, Android locates an appropriate component to respond to the intent, launches a new instance of the component (if needed), and passes the intent object to it.

Components advertise the kinds of intents they can handle through intent filters, which are specified in the AndroidManifest.xml file as <intent-filter> elements. A component can have any number of intent filters, each describing a different capability.

The parameters of this feature can be configured using the Set Config API.

SEE ALSO:

Intent Output Setup

DataWedge invokes an intent though an Intent action in an Intent category as described in its AndroidManifest.xml file. For example, if the DataWedge manifest contains the lines...

<intent-filter>
    ...
    <action android:name="com.myapp.action" />
    <category android:name="android.intent.category.DEFAULT" />
    ...
</intent-filter>

...the Intent action is com.myapp.action and the Intent category is android.intent.category.DEFAULT.

When combined, these two values are like a "channel" to which an app can listen for intents that use the same combination, filtering out "noise" from other intents that use different value pairs. Once these values are known, DataWedge Intent Output must be set to match.

Important: For scanning applications that output directly to an activity, the activity must be designated as "singleTop" in the app's AndroidManifest.xml file. Failure to designate an activity in this way will cause an instance of the activity to be launched with every decode, and the acquired data sent to each newly spawned instance.

To set a DataWedge Action/Category pair:

1. Locate the Intent Output section of the Profile being configured.

2. Check "Enabled" box to activate Intent Output:
Intent Output options for the "Launcher" Profile

3. Specify action, category and delivery as described below:

Intent action - specifies the action to handle the intent

Intent category - specifies the category of intent to be handled

Intent delivery - used to select one of three delivery methods for intent-based data:

  • Send via startActivity
  • Send via startService
  • Broadcast Intent

When Intent delivery is set to Broadcast Intent, DataWedge sets the Receiver foreground flag Intent.FLAG_RECEIVER_FOREGROUND in the broadcast Intent, giving the broadcast recipient permission to run at foreground priority with a shorter timeout interval. Zebra recommends using this flag only if delays are seen in delivery of intents immediately following device boot-up.

Serial Output

When acquiring data with a device connected to a serial/USB port, data populates the intent bundle using the bundle extras listed below. Note: Some of these extras were introduced with DataWedge 6.5, as indicated.

Parameters

Extra Name: "com.symbol.datawedge.data_string"
Type: [String]
Contents: UTF8-encoded string data

Extra Name: "com.symbol.datawedge.source"
Type: [String]
Contents: Value is always “serial”

Extras Introduced with DataWedge 6.5

Extra Name: com.symbol.datawedge.device_id
Type: [String]
Contents: Device identifier (usually the port name)

Extra Name: "com.symbol.datawedge.device_name"
Type: [String]
Contents: Friendly name of the port
Example: "Serial port 1"

Extra Name: "com.symbol.datawedge.data_raw"
Type: [Byte Array]
Contents: Byte array containing the acquired data in unprocessed form

Single Decode Mode

Single mode reads and decodes a single barcode at a time, and is the most common decoding mode. For decoding multiple barcodes simultaneously, such as with UDI-compliant objects, see UDI/Multiple Decode Mode.

Parameters

Name: "com.symbol.datawedge.source"
Type: [String]
Contents: Source of incoming data
Possible values:

  • "msr"
  • "scanner"
  • "simulscan"

NOTE: Source of incoming data is "scanner" for camera, imager or scanner.

Name: "com.symbol.datawedge.label_type"
Type: [String]
Contents: Barcode label type (i.e. "EAN128")

Name: "com.symbol.datawedge.data_string"
Type: [String]
Contents: Acquired barcode characters
Example: "abcde12345"

Name: "com.symbol.datawedge.decode_data"
Type: [List <byte [ ]>]
Contents: Acquired raw (unmodified) data as an array list of byte arrays
Example: List_Item_1(array_1(byte11,byte12,byte13)),List_Item_2(array_2(byte21,byte22,byte23)) ...

Name: "com.symbol.datawedge.decoded_mode"
Type: [String]
Contents: Mode used to decode the incoming data
Possible values:

  • "multiple_decode"
  • "single_decode"

UDI/Multiple Decode Mode

When decoding a UDI-compliant object, data is acquired from multiple barcodes simultaneously and output as a multi-decode bundle, which differs from a single-decode bundle. DataWedge also can acquire multiple non-UDI barcodes in a single scan. This section applies to both modes.

Parameters

Name: "com.symbol.datawedge.decode_mode"
Type: [String]
Contents: Mode used to decode incoming data
Possible values:

  • "multiple_decode"
  • "single_decode"

Name: "com.symbol.datawedge.smart_decode_type"
Type: [String]
Contents: Decode type
Possible values:

  • “udi”
  • “multibarcode”

Name: "com.symbol.datawedge.data_string"
Type: [String]
Contents: Acquired barcode characters
Example: "abcde12345"

Name: "com.symbol.datawedge.decode_data"
Type: [List <byte [ ]>]
Contents: Acquired raw (unmodified) data as an array list of byte arrays
Example: List_Item_1(array_1(byte11,byte12,byte13)), List_Item_2(array_2(byte21,byte22,byte23)) ...

Name: "com.symbol.datawedge.source"
Type: [String]
Contents: Source of incoming data
Possible values:

  • "msr"
  • "scanner"
  • "simulscan"

Name: "com.symbol.datawedge.label_id"
Type: [String]
Contents: UDI type of incoming data
Possible values:

  • “UDI_HIBCC”
  • “UDI_GS1”
  • “UDI_ICCBBA”
  • “UNDEFINED”

Name: "com.symbol.datawedge.barcodes"
Type: [List <Bundle>]
Contents: See Bundle description (below)

Name: "com.symbol.datawedge.tokenized_data"
Type: [List <Bundle>]
Contents: See Bundle description (below)
Note: Source of incoming data is "scanner" for camera, imager or scanner

Barcode Bundle

Bundle name: "com.symbol.datawedge.barcodes"

Parameters

Name: "com.symbol.datawedge.label_type"
Type: [String]
Contents: Barcode label type, original symbology (i.e. "EAN128")

Name: "com.symbol.datawedge.decode_data"
Type: [byte [ ] ]
Contents: Acquired raw (unmodified) data as a byte array

Name: "com.symbol.datawedge.data_string"
Type: [String]
Contents: Acquired barcode characters
Example: "abcde12345"

Tokenized Data Bundle

Bundle name: "com.symbol.datawedge.tokenized_data"

Parameters

Name: "token_id"
Type: [String]
Contents: Data in a UDI-defined tag
Possible values: (see token IDs, below)

Name: "token_data_type"
Type: [String]
Contents: Incoming data type
Example: date, long, string

Name: "token_format"
Type: [String]
Contents: Format of incoming string
Example: YYYYMMDD

Name: "token_string_data"
Type: [String]
Contents: Acquired barcode characters
Example: "abcde12345"

Name: "token_binary_data"
Type: [byte [ ] ]
Contents: Acquired barcode data as a byte array

Token IDs

Token ID: di
Display Name: Device identifier

Token ID: manufacturing_date_original
Display Name: Manufacturing date

Token ID: expiration_date_original
Display Name: Expiration date

Token ID: lot_number
Display Name: Lot number

Token ID: serial_number
Display Name: Serial number

Token ID: mpho_lot_number
Display Name: Medical products of human origin (MPHO) lot number

Token ID: donation_id
Display Name: Donation ID number

Token ID: labeler_identification_code
Display Name: Labeler ID code

Token ID: product_or_catalog_number
Display Name: Product or catalog number

Token ID: unit_of_measure_id
Display Name: Unit of measure ID

Token ID: Quantity
Display Name: Quantity

Other Decode Tags

The decode-related data added to an intent bundle can be retrieved using specific string tags. Use the JavaScript call below with the string tags in the section that follows.


Intent.getStringtExtra()

Tag: LABEL_TYPE_TAG
Type: [String]
Name: "com.symbol.datawedge.label_type"
Contents: Barcode label type
Example: "EAN128"

Tag: DATA_STRING_TAG
Type: [String]
Name: "com.symbol.datawedge.data_string"
Contents: Acquired barcode characters
Example: "abcde12345"

Note: When multiple barcodes are acquired simultaneously, the decoded data is concatenated and sent out as a single string.

**Tag**: DECODE_DATA_TAG
**Type**: [byte [ ] ]

Name: "com.symbol.datawedge.decode_data"
Contents: Decoded data returned as a list of byte arrays.

Note: In most cases there will be one byte array per decode.

Other DataWedge Output Options:

Related guides: