Barcode scanning tool class, which is used to check permissions and start the barcode scanning page. This class provides the Default View and Bitmap modes for barcode scanning and a QR code generation API.

Constant Summary

Type	Name	Desc
int	SUCCESS	The code scanning view can be started.
int	ERROR_NO_CAMERA_PERMISSION	No camera permission.
int	ERROR_NO_READ_PERMISSION	No read permission.
String	RESULT	Defines the result key.

Public Method Summary

Return type	Method name
int	public static int startScan(android.app.Activity activity, int requestCode, HmsScanAnalyzerOptions option)
HmsScan[]	public static HmsScan[] decodeWithBitmap(android.content.Context context, android.graphics.Bitmap bitmap, HmsScanAnalyzerOptions format)
Bitmap	public static android.graphics.Bitmap buildBitmap(String content, int type, int width, int height, HmsBuildBitmapOption options) throw WriterException

Constants

Constant

public static final int SUCCESS

The code scanner view can be started.
Constant Value: 0

Constant

public static final int ERROR_NO_CAMERA_PERMISSION

No camera permission.
Constant Value: 1

Constant

public static final int ERROR_NO_READ_PERMISSION

No read permission.
Constant Value: 2

Constant

public static final String RESULT

Defines the result key.

Constant Value: SCAN_RESULT

Public Methods

Method

public static int startScan(android.app.Activity activity, int requestCode, HmsScanAnalyzerOptions option)

Checks the camera and storage permissions required for scanning. If the permissions are available, start the code scanning view provided by HUAWEI Scan Kit. If the permissions are unavailable, stay on the existing page.

Parameters

Parameter name	Parameter desc
activity	A scanning request activity.
requestCode	A scanning request code, which is used to check whether the activity is returned by the code scanning view.
option	Barcode scanning format option.

Return

Type	desc
int	Scanning request result status. The values SUCCESS, ERROR_NO_CAMERA_PERMISSION, and ERROR_NO_READ_PERMISSION indicate a successful request, no camera permission, and no storage permission, respectively.

Method

public static HmsScan[] decodeWithBitmap(android.content.Context context, android.graphics.Bitmap bitmap, HmsScanAnalyzerOptions format)

Bitmap decoding API.

Parameters

Parameter name	Parameter desc
context	Request context, which is generally the activity object that is being called, for example MainActivity.this.
bitmap	Image to be decoded. For optimal effect, it is recommended that the image resolution range from 960px × 540px to 1920px × 1080px, with a maximum image size of 50 MB.
format	Specified barcode scanning format.

Return

Type	desc
HmsScan[]	Image decoding result.

public static android.graphics.Bitmap buildBitmap(String content, int type, int width, int height, HmsBuildBitmapOption options) throw WriterException

Generates 1D or 2D barcodes.

Parameters

Generated QR code image.Type	desc
content	QR code content.
type	Barcode format.
width	Width of a QR code to be generated.
height	Height of a QR code to be generated.
options	Barcode generation option.

Return

Type	desc
android.graphics.Bitmap	Barcode.

Throws

Type	desc
WriterException	Barcode generation exception.

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