@jimcase/barcode-scanning

v7.0.0-next.5

Published

a year ago

Capacitor plugin for ML Kit Barcode Scanning.

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jimcase

capacitor plugin native

@capacitor-mlkit/barcode-scanning

Temporary package until @capacitor-mlkit/barcode-scanning next release https://github.com/capawesome-team/capacitor-mlkit/pull/226

Unofficial Capacitor plugin for ML Kit Barcode Scanning.[^1][^2]

Features

🧩 Optional ready-to-use interface without webview customizations
🏎️ Extremely fast
📷 Scan multiple barcodes at once
⏺️ Define detection area
🏞️ Reading barcodes from images
🔦 Torch and Autofocus support
🔋 Supports Android and iOS

For a complete list of supported barcodes, see BarcodeFormat.

Demo

A working example can be found here: https://github.com/robingenz/capacitor-mlkit-plugin-demo

| Android | | ------------------------------------------------------------------------------------------------------------------------------- | | |

Guides

How to build an Ionic Barcode Scanner with Capacitor

Installation

npm install @jimcase/barcode-scanning@next
npx cap sync

Attention: Please use the next tag to install the latest version of the plugin due to issue #179.

Android

Permissions

This API requires the following permissions be added to your AndroidManifest.xml before the application tag:

<!-- To get access to the camera. -->
<uses-permission android:name="android.permission.CAMERA" />
<!-- To get access to the flashlight. -->
<uses-permission android:name="android.permission.FLASHLIGHT"/>

You also need to add the following meta data in the application tag in your AndroidManifest.xml:

<meta-data android:name="com.google.mlkit.vision.DEPENDENCIES" android:value="barcode_ui"/>
<!-- To use multiple models: android:value="face,model2,model3" -->

Data Binding

Enable the databinding library by setting the dataBinding and enabled build options to true in your module-level (app-level) Gradle file (usually android/app/build.gradle):

android {
    ...
+    buildFeatures {
+        dataBinding true
+    }
+    dataBinding {
+        enabled = true
+    }
}

iOS

Minimum Deployment Target

Make sure to set the deployment target in your ios/App/Podfile to at least 15.5:

platform :ios, '15.5'

Variables

This plugin will use the following project variables (defined in your app’s variables.gradle file):

$androidxCameraCamera2Version version of com.google.mlkit:barcode-scanning (default: 1.1.0)
$androidxCameraCoreVersion version of com.google.mlkit:barcode-scanning (default: 1.1.0)
$androidxCameraLifecycleVersion version of com.google.mlkit:barcode-scanning (default: 1.1.0)
$androidxCameraViewVersion version of com.google.mlkit:barcode-scanning (default: 1.1.0)
$mlkitBarcodeScanningVersion version of com.google.mlkit:barcode-scanning (default: 17.1.0)
$playServicesCodeScannerVersion version of com.google.mlkit:barcode-scanning (default: 16.0.0)

iOS

Add the NSCameraUsageDescription key to the ios/App/App/Info.plist file, which tells the user why the app needs to use the camera:

+ <key>NSCameraUsageDescription</key>
+ <string>The app enables the scanning of various barcodes.</string>

Configuration

No configuration required for this plugin.

Demo

A working example can be found here: robingenz/capacitor-mlkit-plugin-demo

Usage

import {
  BarcodeScanner,
  BarcodeFormat,
  LensFacing,
} from '@jimcase/barcode-scanning';

const startScan = async () => {
  // The camera is visible behind the WebView, so that you can customize the UI in the WebView.
  // However, this means that you have to hide all elements that should not be visible.
  // You can find an example in our demo repository.
  // In this case we set a class `barcode-scanner-active`, which then contains certain CSS rules for our app.
  document.querySelector('body')?.classList.add('barcode-scanner-active');

  // Add the `barcodeScanned` listener
  const listener = await BarcodeScanner.addListener(
    'barcodeScanned',
    async result => {
      console.log(result.barcode);
    },
  );

  // Start the barcode scanner
  await BarcodeScanner.startScan();
};

const stopScan = async () => {
  // Make all elements in the WebView visible again
  document.querySelector('body')?.classList.remove('barcode-scanner-active');

  // Remove all listeners
  await BarcodeScanner.removeAllListeners();

  // Stop the barcode scanner
  await BarcodeScanner.stopScan();
};

const scanSingleBarcode = async () => {
  return new Promise(async resolve => {
    document.querySelector('body')?.classList.add('barcode-scanner-active');

    const listener = await BarcodeScanner.addListener(
      'barcodeScanned',
      async result => {
        await listener.remove();
        document
          .querySelector('body')
          ?.classList.remove('barcode-scanner-active');
        await BarcodeScanner.stopScan();
        resolve(result.barcode);
      },
    );

    await BarcodeScanner.startScan();
  });
};

const scan = async () => {
  const { barcodes } = await BarcodeScanner.scan({
    formats: [BarcodeFormat.QrCode],
  });
  return barcodes;
};

const isSupported = async () => {
  const { supported } = await BarcodeScanner.isSupported();
  return supported;
};

const enableTorch = async () => {
  await BarcodeScanner.enableTorch();
};

const disableTorch = async () => {
  await BarcodeScanner.disableTorch();
};

const toggleTorch = async () => {
  await BarcodeScanner.toggleTorch();
};

const isTorchEnabled = async () => {
  const { enabled } = await BarcodeScanner.isTorchEnabled();
  return enabled;
};

const isTorchAvailable = async () => {
  const { available } = await BarcodeScanner.isTorchAvailable();
  return available;
};

const setZoomRatio = async () => {
  await BarcodeScanner.setZoomRatio({ zoomRatio: 0.5 });
};

const getZoomRatio = async () => {
  const { zoomRatio } = await BarcodeScanner.getZoomRatio();
  return zoomRatio;
};

const getMinZoomRatio = async () => {
  const { zoomRatio } = await BarcodeScanner.getMinZoomRatio();
  return zoomRatio;
};

const getMaxZoomRatio = async () => {
  const { zoomRatio } = await BarcodeScanner.getMaxZoomRatio();
  return zoomRatio;
};

const openSettings = async () => {
  await BarcodeScanner.openSettings();
};

const isGoogleBarcodeScannerModuleAvailable = async () => {
  const { available } =
    await BarcodeScanner.isGoogleBarcodeScannerModuleAvailable();
  return available;
};

const installGoogleBarcodeScannerModule = async () => {
  await BarcodeScanner.installGoogleBarcodeScannerModule();
};

const checkPermissions = async () => {
  const { camera } = await BarcodeScanner.checkPermissions();
  return camera;
};

const requestPermissions = async () => {
  const { camera } = await BarcodeScanner.requestPermissions();
  return camera;
};

An example of the CSS class barcode-scanner-active with Ionic Framework could be:

// Hide all elements
body.barcode-scanner-active {
  visibility: hidden;
  --background: transparent;
  --ion-background-color: transparent;
}

// Show only the barcode scanner modal
.barcode-scanner-modal {
  visibility: visible;
}

@media (prefers-color-scheme: dark) {
  .barcode-scanner-modal {
    --background: transparent;
    --ion-background-color: transparent;
  }
}

An example of the CSS class barcode-scanner-active without Ionic Framework could be:

// Hide all elements
body.barcode-scanner-active {
  visibility: hidden;
}

// Show only the barcode scanner modal
.barcode-scanner-modal {
  visibility: visible;
}

If you can't see the camera view, make sure all elements in the DOM are not visible or have a transparent background to debug the issue.

API

startScan(...)

startScan(options?: StartScanOptions | undefined) => Promise<void>

Start scanning for barcodes.

Only available on Android and iOS.

| Param | Type | | ------------- | ------------------------------------------------------------- | | options | StartScanOptions |

Since: 0.0.1

stopScan()

stopScan() => Promise<void>

Stop scanning for barcodes.

Only available on Android and iOS.

Since: 0.0.1

readBarcodesFromImage(...)

readBarcodesFromImage(options: ReadBarcodesFromImageOptions) => Promise<ReadBarcodesFromImageResult>

Read barcodes from an image.

Only available on Android and iOS.

| Param | Type | | ------------- | ------------------------------------------------------------------------------------- | | options | ReadBarcodesFromImageOptions |

Returns: Promise<ReadBarcodesFromImageResult>

Since: 0.0.1

scan(...)

scan(options?: ScanOptions | undefined) => Promise<ScanResult>

Scan a barcode with a ready-to-use interface without WebView customization.

On Android, this method is only available on devices with Google Play Services installed. Therefore, no camera permission is required.

Attention: Before using this method on Android, first check if the Google Barcode Scanner module is available by using isGoogleBarcodeScannerModuleAvailable().

Only available on Android and iOS.

| Param | Type | | ------------- | --------------------------------------------------- | | options | ScanOptions |

Returns: Promise<ScanResult>

Since: 0.0.1

isSupported()

isSupported() => Promise<IsSupportedResult>

Returns whether or not the barcode scanner is supported.

Available on Android and iOS.

Returns: Promise<IsSupportedResult>

Since: 0.0.1

enableTorch()

enableTorch() => Promise<void>

Enable camera's torch (flash) during a scan session.

Only available on Android and iOS.

Since: 0.0.1

disableTorch()

disableTorch() => Promise<void>

Disable camera's torch (flash) during a scan session.

Only available on Android and iOS.

Since: 0.0.1

toggleTorch()

toggleTorch() => Promise<void>

Toggle camera's torch (flash) during a scan session.

Only available on Android and iOS.

Since: 0.0.1

isTorchEnabled()

isTorchEnabled() => Promise<IsTorchEnabledResult>

Returns whether or not the camera's torch (flash) is enabled.

Only available on Android and iOS.

Returns: Promise<IsTorchEnabledResult>

Since: 0.0.1

isTorchAvailable()

isTorchAvailable() => Promise<IsTorchAvailableResult>

Returns whether or not the camera's torch (flash) is available.

Only available on Android and iOS.

Returns: Promise<IsTorchAvailableResult>

Since: 0.0.1

setZoomRatio(...)

setZoomRatio(options: SetZoomRatioOptions) => Promise<void>

Set the zoom ratio of the camera.

Only available on Android and iOS.

| Param | Type | | ------------- | ------------------------------------------------------------------- | | options | SetZoomRatioOptions |

Since: 5.4.0

getZoomRatio()

getZoomRatio() => Promise<GetZoomRatioResult>

Get the zoom ratio of the camera.

Only available on Android and iOS.

Returns: Promise<GetZoomRatioResult>

Since: 5.4.0

getMinZoomRatio()

getMinZoomRatio() => Promise<GetMinZoomRatioResult>

Get the minimum zoom ratio of the camera.

Only available on Android and iOS.

Returns: Promise<GetMinZoomRatioResult>

Since: 5.4.0

getMaxZoomRatio()

getMaxZoomRatio() => Promise<GetMaxZoomRatioResult>

Get the maximum zoom ratio of the camera.

Only available on Android and iOS.

Returns: Promise<GetMaxZoomRatioResult>

Since: 5.4.0

openSettings()

openSettings() => Promise<void>

Open the settings of the app so that the user can grant the camera permission.

Only available on Android and iOS.

Since: 0.0.1

isGoogleBarcodeScannerModuleAvailable()

isGoogleBarcodeScannerModuleAvailable() => Promise<IsGoogleBarcodeScannerModuleAvailableResult>

Check if the Google Barcode Scanner module is available.

If the Google Barcode Scanner module is not available, you can install it by using installGoogleBarcodeScannerModule().

Only available on Android.

Returns: Promise<IsGoogleBarcodeScannerModuleAvailableResult>

Since: 5.1.0

installGoogleBarcodeScannerModule()

installGoogleBarcodeScannerModule() => Promise<void>

Install the Google Barcode Scanner module.

Attention: This only starts the installation. The googleBarcodeScannerModuleInstallProgress event listener will notify you when the installation is complete.

Only available on Android.

Since: 5.1.0

checkPermissions()

checkPermissions() => Promise<PermissionStatus>

Check camera permission.

Only available on Android and iOS.

Returns: Promise<PermissionStatus>

Since: 0.0.1

requestPermissions()

requestPermissions() => Promise<PermissionStatus>

Request camera permission.

Only available on Android and iOS.

Returns: Promise<PermissionStatus>

Since: 0.0.1

addListener('barcodeScanned', ...)

addListener(eventName: 'barcodeScanned', listenerFunc: (event: BarcodeScannedEvent) => void) => Promise<PluginListenerHandle>

Called when a barcode is scanned.

Available on Android and iOS.

| Param | Type | | ------------------ | --------------------------------------------------------------------------------------- | | eventName | 'barcodeScanned' | | listenerFunc | (event: BarcodeScannedEvent) => void |

Returns: Promise<PluginListenerHandle>

Since: 0.0.1

addListener('barcodesScanned', ...)

addListener(eventName: 'barcodesScanned', listenerFunc: (event: BarcodesScannedEvent) => void) => Promise<PluginListenerHandle>

Called when barcodes are scanned.

Available on Android and iOS.

| Param | Type | | ------------------ | ----------------------------------------------------------------------------------------- | | eventName | 'barcodesScanned' | | listenerFunc | (event: BarcodesScannedEvent) => void |

Returns: Promise<PluginListenerHandle>

Since: 6.2.0

addListener('scanError', ...)

addListener(eventName: 'scanError', listenerFunc: (event: ScanErrorEvent) => void) => Promise<PluginListenerHandle>

Called when an error occurs during the scan.

Available on Android and iOS.

| Param | Type | | ------------------ | ----------------------------------------------------------------------------- | | eventName | 'scanError' | | listenerFunc | (event: ScanErrorEvent) => void |

Returns: Promise<PluginListenerHandle>

Since: 0.0.1

addListener('googleBarcodeScannerModuleInstallProgress', ...)

addListener(eventName: 'googleBarcodeScannerModuleInstallProgress', listenerFunc: (event: GoogleBarcodeScannerModuleInstallProgressEvent) => void) => Promise<PluginListenerHandle>

Called when the Google Barcode Scanner module is installed.

Available on Android.

| Param | Type | | ------------------ | --------------------------------------------------------------------------------------------------------------------------------------------- | | eventName | 'googleBarcodeScannerModuleInstallProgress' | | listenerFunc | (event: GoogleBarcodeScannerModuleInstallProgressEvent) => void |

Returns: Promise<PluginListenerHandle>

Since: 5.1.0

removeAllListeners()

removeAllListeners() => Promise<void>

Remove all listeners for this plugin.

Since: 0.0.1

Interfaces

StartScanOptions

| Prop | Type | Description | Default | Since | | ---------------- | ------------------------------------------------- | ---------------------------------------------------------------------------------------- | ----------------------------------- | ----- | | formats | BarcodeFormat[] | Improve the speed of the barcode scanner by configuring the barcode formats to scan for. | | 0.0.1 | | lensFacing | LensFacing | Configure the camera (front or back) to use. | | 0.0.1 | | resolution | Resolution | Configure the resolution of the captured image that is used for barcode scanning. | Resolution['1280x720'] | 7.0.0 |

ReadBarcodesFromImageResult

| Prop | Type | Description | Since | | -------------- | ---------------------- | ---------------------- | ----- | | barcodes | Barcode[] | The detected barcodes. | 0.0.1 |

Barcode

| Prop | Type | Description | Since | | ------------------- | ------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- | ----- | | bytes | number[] | Raw bytes as it was encoded in the barcode. | 0.0.1 | | calendarEvent | BarcodeCalendarEvent | Calendar event info. | 7.0.0 | | contactInfo | BarcodeContactInfo | Person's or organization's business card. | 7.0.0 | | cornerPoints | [[number, number], [number, number], [number, number], [number, number]] | The four corner points of the barcode in clockwise order starting with top-left. This property is currently only supported by the startScan(...) method. | 0.0.1 | | displayValue | string | The barcode value in a human readable format. | 0.0.1 | | driverLicense | BarcodeDriverLicense | Driver license or ID card. | 7.0.0 | | email | BarcodeEmail | An email message from a 'MAILTO:'. | 7.0.0 | | format | BarcodeFormat | The barcode format. | 0.0.1 | | geoPoint | BarcodeGeoPoint | GPS coordinates from a 'GEO:'. | 7.0.0 | | phone | BarcodePhone | Phone number info. | 7.0.0 | | rawValue | string | The barcode value in a machine readable format. | 0.0.1 | | sms | BarcodeSms | A sms message from a 'SMS:'. | 7.0.0 | | urlBookmark | BarcodeUrlBookmark | A URL and title from a 'MEBKM:'. | 7.0.0 | | valueType | BarcodeValueType | The barcode value type. | 0.0.1 | | wifi | BarcodeWifi | A wifi network parameters from a 'WIFI:'. | 7.0.0 |

BarcodeCalendarEvent

| Prop | Type | Description | Since | | ----------------- | ------------------- | ---------------------------------------- | ----- | | description | string | The event description. | 7.0.0 | | end | string | The event end date as ISO 8601 string. | 7.0.0 | | location | string | The event location. | 7.0.0 | | organizer | string | The event organizer. | 7.0.0 | | start | string | The event start date as ISO 8601 string. | 7.0.0 | | status | string | The event status. | 7.0.0 | | summary | string | The event summary. | 7.0.0 |

BarcodeContactInfo

| Prop | Type | Description | Since | | ------------------ | ------------------------------------------------- | --------------------------- | ----- | | addresses | Address[] | The contact's addresses. | 7.0.0 | | emails | BarcodeEmail[] | The contact's emails. | 7.0.0 | | personName | PersonName | The contact's name. | 7.0.0 | | organization | string | The contact's organization. | 7.0.0 | | phones | BarcodePhone[] | The contact's phones. | 7.0.0 | | title | string | The contact's title. | 7.0.0 | | urls | string[] | The contact's urls. | 7.0.0 |

Address

| Prop | Type | Description | Since | | ------------------ | --------------------------------------------------- | --------------------------------------------------- | ----- | | addressLines | string[] | Formatted address, multiple lines when appropriate. | 7.0.0 | | type | AddressType | Address type. | 7.0.0 |

BarcodeEmail

| Prop | Type | Description | Since | | ------------- | ----------------------------------------------------------- | ----------------------- | ----- | | address | string | The email address. | 7.0.0 | | body | string | The email body. | 7.0.0 | | subject | string | The email subject. | 7.0.0 | | type | EmailFormatType | The email address type. | 7.0.0 |

PersonName

| Prop | Type | Description | Since | | ------------------- | ------------------- | ------------------------------------------------------------------------------------ | ----- | | first | string | First name. | 7.0.0 | | formattedName | string | The formatted name. | 7.0.0 | | last | string | Last name. | 7.0.0 | | middle | string | Middle name. | 7.0.0 | | prefix | string | Name prefix. | 7.0.0 | | pronunciation | string | Text string to be set as the kana name in the phonebook. Used for Japanese contacts. | 7.0.0 | | suffix | string | Name suffix. | 7.0.0 |

BarcodePhone

| Prop | Type | Description | Since | | ------------ | ----------------------------------------------------------- | ---------------------- | ----- | | number | string | The phone number. | 7.0.0 | | type | PhoneFormatType | The phone number type. | 7.0.0 |

BarcodeDriverLicense

| Prop | Type | Description | Since | | -------------------- | ------------------- | -------------------------------------------------- | ----- | | addressCity | string | City of holder's address. | 7.0.0 | | addressState | string | State of holder's address. | 7.0.0 | | addressStreet | string | Street of holder's address. | 7.0.0 | | addressZip | string | Postal code of holder's address. | 7.0.0 | | birthDate | string | Birthdate of the holder. | 7.0.0 | | documentType | string | "DL" for driver's licenses, "ID" for ID cards. | 7.0.0 | | expiryDate | string | Expiration date of the license. | 7.0.0 | | firstName | string | Holder's first name. | 7.0.0 | | gender | string | Holder's gender. | 7.0.0 | | issueDate | string | Issue date of the license. | 7.0.0 | | issuingCountry | string | ISO 3166-1 alpha-3 code in which DL/ID was issued. | 7.0.0 | | lastName | string | Holder's last name. | 7.0.0 | | licenseNumber | string | Driver license ID number. | 7.0.0 | | middleName | string | Holder's middle name. | 7.0.0 |

BarcodeGeoPoint

| Prop | Type | Description | Since | | --------------- | ------------------- | ----------- | ----- | | latitude | number | Latitude. | 7.0.0 | | longitude | number | Longitude. | 7.0.0 |

BarcodeSms

| Prop | Type | Description | Since | | ----------------- | ------------------- | ------------------------------- | ----- | | phoneNumber | string | The phone number of the sms. | 7.0.0 | | message | string | The message content of the sms. | 7.0.0 |

BarcodeUrlBookmark

| Prop | Type | Description | Since | | ----------- | ------------------- | -------------------------- | ----- | | url | string | The URL of the bookmark. | 7.0.0 | | title | string | The title of the bookmark. | 7.0.0 |

BarcodeWifi

| Prop | Type | Description | Since | | -------------------- | ----------------------------------------------------------------- | ----------------------------- | ----- | | encryptionType | WifiEncryptionType | Encryption type of the WI-FI. | 7.0.0 | | password | string | Password of the WI-FI. | 7.0.0 | | ssid | string | SSID of the WI-FI. | 7.0.0 |

ReadBarcodesFromImageOptions

| Prop | Type | Description | Since | | ------------- | ---------------------------- | ---------------------------------------------------------------------------------------- | ----- | | formats | BarcodeFormat[] | Improve the speed of the barcode scanner by configuring the barcode formats to scan for. | 0.0.1 | | path | string | The local path to the image file. | 0.0.1 |

ScanResult

| Prop | Type | Description | Since | | -------------- | ---------------------- | ---------------------- | ----- | | barcodes | Barcode[] | The detected barcodes. | 0.0.1 |

ScanOptions

IsSupportedResult

| Prop | Type | Description | Since | | --------------- | -------------------- | --------------------------------------------------------------------------------------- | ----- | | supported | boolean | Whether or not the barcode scanner is supported by checking if the device has a camera. | 0.0.1 |

IsTorchEnabledResult

| Prop | Type | Description | Since | | ------------- | -------------------- | ------------------------------------ | ----- | | enabled | boolean | Whether or not the torch is enabled. | 0.0.1 |

IsTorchAvailableResult

| Prop | Type | Description | Since | | --------------- | -------------------- | -------------------------------------- | ----- | | available | boolean | Whether or not the torch is available. | 0.0.1 |

SetZoomRatioOptions

| Prop | Type | Description | Since | | --------------- | ------------------- | ---------------------- | ----- | | zoomRatio | number | The zoom ratio to set. | 5.4.0 |

GetZoomRatioResult

| Prop | Type | Description | Since | | --------------- | ------------------- | --------------- | ----- | | zoomRatio | number | The zoom ratio. | 5.4.0 |

GetMinZoomRatioResult

| Prop | Type | Description | Since | | --------------- | ------------------- | ----------------------- | ----- | | zoomRatio | number | The minimum zoom ratio. | 5.4.0 |

GetMaxZoomRatioResult

| Prop | Type | Description | Since | | --------------- | ------------------- | ----------------------- | ----- | | zoomRatio | number | The maximum zoom ratio. | 5.4.0 |

IsGoogleBarcodeScannerModuleAvailableResult

| Prop | Type | Description | Since | | --------------- | -------------------- | ------------------------------------------------------------------------------------- | ----- | | available | boolean | Whether or not the Google Barcode Scanner module is available. | 5.1.0 |

PermissionStatus

| Prop | Type | Since | | ------------ | ----------------------------------------------------------------------- | ----- | | camera | CameraPermissionState | 0.0.1 |

PluginListenerHandle

| Prop | Type | | ------------ | ----------------------------------------- | | remove | () => Promise<void> |

BarcodeScannedEvent

| Prop | Type | Description | Since | | ------------- | ------------------------------------------- | ------------------- | ----- | | barcode | Barcode | A detected barcode. | 0.0.1 |

BarcodesScannedEvent

| Prop | Type | Description | Since | | -------------- | ---------------------- | ---------------------- | ----- | | barcodes | Barcode[] | The detected barcodes. | 6.2.0 |

ScanErrorEvent

| Prop | Type | Description | Since | | ------------- | ------------------- | ------------------ | ----- | | message | string | The error message. | 0.0.1 |

GoogleBarcodeScannerModuleInstallProgressEvent

| Prop | Type | Description | Since | | -------------- | --------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------- | ----- | | state | GoogleBarcodeScannerModuleInstallState | The current state of the installation. | 5.1.0 | | progress | number | The progress of the installation in percent between 0 and 100. | 5.1.0 |

Type Aliases

CameraPermissionState

PermissionState | 'limited'

PermissionState

'prompt' | 'prompt-with-rationale' | 'granted' | 'denied'

Enums

BarcodeFormat

| Members | Value | Description | Since | | ---------------- | -------------------------- | ---------------------------------- | ----- | | Aztec | 'AZTEC' | Only available on Android and iOS. | 0.0.1 | | Codabar | 'CODABAR' | Only available on Android and iOS. | 0.0.1 | | Code39 | 'CODE_39' | Only available on Android and iOS. | 0.0.1 | | Code93 | 'CODE_93' | Only available on Android and iOS. | 0.0.1 | | Code128 | 'CODE_128' | Only available on Android and iOS. | 0.0.1 | | DataMatrix | 'DATA_MATRIX' | Only available on Android and iOS. | 0.0.1 | | Ean8 | 'EAN_8' | Only available on Android and iOS. | 0.0.1 | | Ean13 | 'EAN_13' | Only available on Android and iOS. | 0.0.1 | | Itf | 'ITF' | Only available on Android and iOS. | 0.0.1 | | Pdf417 | 'PDF_417' | Only available on Android and iOS. | 0.0.1 | | QrCode | 'QR_CODE' | Only available on Android and iOS. | 0.0.1 | | UpcA | 'UPC_A' | Only available on Android and iOS. | 0.0.1 | | UpcE | 'UPC_E' | Only available on Android and iOS. | 0.0.1 |

LensFacing

| Members | Value | Since | | ----------- | -------------------- | ----- | | Front | 'FRONT' | 0.0.1 | | Back | 'BACK' | 0.0.1 |

Resolution

| Members | Value | Since | | ----------------- | -------------- | ----- | | '640x480' | 0 | 7.0.0 | | '1280x720' | 1 | 7.0.0 | | '1920x1080' | 2 | 7.0.0 |

AddressType

| Members | Value | Since | | ------------- | -------------- | ----- | | HOME | 0 | 7.0.0 | | UNKNOWN | 1 | 7.0.0 | | WORK | 2 | 7.0.0 |

EmailFormatType

| Members | Value | Since | | ------------- | -------------- | ----- | | HOME | 0 | 7.0.0 | | UNKNOWN | 1 | 7.0.0 | | WORK | 2 | 7.0.0 |

PhoneFormatType

| Members | Value | Since | | ------------- | -------------- | ----- | | FAX | 0 | 7.0.0 | | HOME | 1 | 7.0.0 | | MOBILE | 2 | 7.0.0 | | UNKNOWN | 3 | 7.0.0 | | WORK | 4 | 7.0.0 |

BarcodeValueType

| Members | Value | Since | | -------------------- | ------------------------------ | ----- | | CalendarEvent | 'CALENDAR_EVENT' | 0.0.1 | | ContactInfo | 'CONTACT_INFO' | 0.0.1 | | DriversLicense | 'DRIVERS_LICENSE' | 0.0.1 | | Email | 'EMAIL' | 0.0.1 | | Geo | 'GEO' | 0.0.1 | | Isbn | 'ISBN' | 0.0.1 | | Phone | 'PHONE' | 0.0.1 | | Product | 'PRODUCT' | 0.0.1 | | Sms | 'SMS' | 0.0.1 | | Text | 'TEXT' | 0.0.1 | | Url | 'URL' | 0.0.1 | | Wifi | 'WIFI' | 0.0.1 | | Unknown | 'UNKNOWN' | 0.0.1 |

WifiEncryptionType

| Members | Value | Since | | ---------- | -------------- | ----- | | OPEN | 1 | 7.0.0 | | WEP | 2 | 7.0.0 | | WPA | 3 | 7.0.0 |

GoogleBarcodeScannerModuleInstallState

| Members | Value | Since | | --------------------- | -------------- | ----- | | UNKNOWN | 0 | 5.1.0 | | PENDING | 1 | 5.1.0 | | DOWNLOADING | 2 | 5.1.0 | | CANCELED | 3 | 5.1.0 | | COMPLETED | 4 | 5.1.0 | | FAILED | 5 | 5.1.0 | | INSTALLING | 6 | 5.1.0 | | DOWNLOAD_PAUSED | 7 | 5.1.0 |

Common Issues

`NullPointerException` during `startScan(...)`

The following error may occur when calling the startScan(...) method: Attempt to invoke virtual method 'void androidx.camera.view.PreviewView.setScaleType(androidx.camera.view.PreviewView$ScaleType)' on a null object reference. In this case, make sure that the databinding library is enabled (see Data Binding).

Terms & Privacy

This plugin uses the Google ML Kit:

Changelog

See CHANGELOG.md.

License

See LICENSE.

[^1]: This project is not affiliated with, endorsed by, sponsored by, or approved by Google LLC or any of their affiliates or subsidiaries. [^2]: QR Code is a registered trademark of DENSO WAVE INCORPORATED.

Published

Vulnerabilities

Links

Maintainers

Keywords

Readme

@capacitor-mlkit/barcode-scanning

Features

Demo

Guides

Installation

Android

Permissions

Data Binding

iOS

Minimum Deployment Target

Variables

iOS

Configuration

Demo

Usage

API

startScan(...)

stopScan()

readBarcodesFromImage(...)

scan(...)

isSupported()

enableTorch()

disableTorch()

toggleTorch()

isTorchEnabled()

isTorchAvailable()

setZoomRatio(...)

getZoomRatio()

getMinZoomRatio()

getMaxZoomRatio()

openSettings()

isGoogleBarcodeScannerModuleAvailable()

installGoogleBarcodeScannerModule()

checkPermissions()

requestPermissions()

addListener('barcodeScanned', ...)

addListener('barcodesScanned', ...)

addListener('scanError', ...)

addListener('googleBarcodeScannerModuleInstallProgress', ...)

removeAllListeners()

Interfaces

StartScanOptions

ReadBarcodesFromImageResult

Barcode

BarcodeCalendarEvent

BarcodeContactInfo

Address

BarcodeEmail

PersonName

BarcodePhone

BarcodeDriverLicense

BarcodeGeoPoint

BarcodeSms

BarcodeUrlBookmark

BarcodeWifi

ReadBarcodesFromImageOptions

ScanResult

ScanOptions

IsSupportedResult

IsTorchEnabledResult

IsTorchAvailableResult

SetZoomRatioOptions

GetZoomRatioResult

GetMinZoomRatioResult

GetMaxZoomRatioResult

IsGoogleBarcodeScannerModuleAvailableResult

PermissionStatus

PluginListenerHandle

BarcodeScannedEvent

BarcodesScannedEvent

ScanErrorEvent

GoogleBarcodeScannerModuleInstallProgressEvent

Type Aliases

CameraPermissionState

`NullPointerException` during `startScan(...)`