{"id":6527,"date":"2021-01-08T14:17:31","date_gmt":"2021-01-08T08:47:31","guid":{"rendered":"https:\/\/www.innovationm.com\/blog\/?p=6527"},"modified":"2021-01-08T14:17:31","modified_gmt":"2021-01-08T08:47:31","slug":"detect-barcode-using-google-vision-api","status":"publish","type":"post","link":"https:\/\/www.innovationm.com\/blog\/detect-barcode-using-google-vision-api\/","title":{"rendered":"Detect Barcode Using Google Vision API"},"content":{"rendered":"

Barcode is a method of representing data in a visual, machine-readable form. <\/span>It represents data by varying parallel lines in width and distance<\/span>. In other words, we can say a barcode is a way to encode information in a visual pattern that a device (a barcode scanner) can read (those black lines and white spaces). <\/span>A barcode scanner can read and translate this black and white bar pattern into a line of test that your retail point of sale system can understand.<\/span><\/p>\n

Applications of Barcode:<\/strong><\/p>\n

1.<\/strong> Barcodes are used to identify products in retail stores.<\/span><\/p>\n

2.<\/strong> Barcodes save time because It offers <\/span>fast recognition and implementation of data.<\/span><\/p>\n

3.<\/strong> Barcode provides security for our data.<\/span><\/p>\n

Formats of Barcodes:<\/strong><\/p>\n

1.<\/strong> Code 128<\/span><\/p>\n

(FORMAT_CODE_128)<\/pre>\n
2.<\/strong> Code 39<\/span><\/p>\n
(FORMAT_CODE_39)<\/pre>\n
3.<\/strong> Code 93<\/span><\/p>\n
(FORMAT_CODE_93)<\/pre>\n
4.<\/strong> Codabar<\/span><\/p>\n
(FORMAT_CODABAR)<\/pre>\n
5.<\/strong> EAN-13 <\/span><\/p>\n
(FORMAT_EAN_13)<\/pre>\n
6.<\/strong> EAN-8 <\/span><\/p>\n
(FORMAT_EAN_8)<\/pre>\n
7.<\/strong> ITF <\/span><\/p>\n
(FORMAT_ITF)<\/pre>\n
8.<\/strong> UPC-A <\/span><\/p>\n
(FORMAT_UPC_A)<\/pre>\n
9.<\/strong> UPC-E<\/span><\/p>\n
(FORMAT_UPC_E)<\/pre>\n
10.<\/strong> QR Code <\/span><\/p>\n
(FORMAT_QR_CODE)<\/pre>\n
11.<\/strong> PDF417<\/span><\/p>\n
(FORMAT_PDF417)<\/pre>\n
12.<\/strong> Aztec<\/span><\/p>\n
(FORMAT_AZTEC)<\/pre>\n
13.<\/strong> Data Matrix <\/span><\/p>\n
(FORMAT_DATA_MATRIX)<\/pre>\n
The Steps to Execution:\u00a0<\/strong><\/p>\n
Barcodes deliver automatic product identification<\/span>, extremely fast recognition and implementation of data. There are following steps as below:<\/span><\/p>\n
1.<\/strong>\u00a0 At Build.Gradle file\u00a0<\/span><\/p>\n
Add dependency of google ml kit\r\n\r\n\u00a0\u00a0\u00a0\u00a0dependencies {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ Use this dependency for implementing barcode in your app\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0implementation 'com.google.mlkit:barcode-scanning:16.1.0'\r\n\r\n\u00a0\u00a0\u00a0\u00a0}<\/pre>\n
2.<\/strong> In your project-level <\/span>build.gradle<\/span> file, Ensure that both your <\/span>buildscript<\/span> and <\/span>allprojects<\/span> sections include Google’s Maven repository.<\/span><\/p>\n
3.<\/strong> Include surfaceview in the layout file.<\/span><\/p>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n\r\n<FrameLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n\r\n\u00a0\u00a0\u00a0xmlns:tools=\"http:\/\/schemas.android.com\/tools\"\r\n\r\n\u00a0\u00a0\u00a0android:layout_width=\"match_parent\"\r\n\r\n\u00a0\u00a0\u00a0android:layout_height=\"match_parent\"\r\n\r\n\u00a0\u00a0\u00a0android:orientation=\"vertical\"\r\n\r\n\u00a0\u00a0\u00a0tools:context=\".ui.activity.BarcodeScaneerActivity\">\r\n\r\n\u00a0\u00a0\u00a0<SurfaceView\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:id=\"@+id\/sfvCameraPreview\"\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:layout_width=\"match_parent\"\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:layout_height=\"match_parent\"\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:background=\"#40000000\"\/>\r\n\r\n\u00a0\u00a0\u00a0<androidx.appcompat.widget.LinearLayoutCompat\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:layout_width=\"match_parent\"\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:layout_height=\"300dp\"\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:layout_gravity=\"center\"\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:layout_margin=\"30dp\"\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:background=\"#73FFFFFF\"\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:alpha=\"0.35\">\r\n\r\n\u00a0\u00a0\u00a0<\/androidx.appcompat.widget.LinearLayoutCompat>\r\n\r\n<\/FrameLayout><\/pre>\n
4.<\/strong> Create an Instance of BarcodeDetector class because It will detect the barcode of any format.<\/span><\/p>\n
BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(this).build();<\/pre>\n
By default, it detects all format of barcodes.<\/span><\/p>\n
5.<\/strong> If we want to detect QRCode or any specific type of barcode then we have to set barcode format.<\/span><\/p>\n
BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(this)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.setBarcodeFormats(Barcode.QR_CODE)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.build();<\/pre>\n
6.<\/strong> Create an instance of CameraSource and pass the instance of Barcode detector.<\/span><\/p>\n
CameraSource cameraSource = new CameraSource.Builder(this, barcodeDetector)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.setFacing(CameraSource.CAMERA_FACING_BACK)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.setAutoFocusEnabled(true)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.setRequestedPreviewSize(1024, 768)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.build();<\/pre>\n
7.<\/strong> Register the callbacks of surfaceview and start the camera after surface created<\/span><\/p>\n
and stop the camera on destroying the surface.<\/span><\/p>\n
cameraPreview.getHolder().addCallback(new SurfaceHolder.Callback() {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@SuppressLint(\"MissingPermission\")\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Override\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public void surfaceCreated(SurfaceHolder holder) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0try {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cameraSource.start(cameraPreview.getHolder());\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} catch (IOException e) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0e.printStackTrace();\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Override\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Override\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public void surfaceDestroyed(SurfaceHolder holder) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cameraSource.stop();\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0});<\/pre>\n
8.<\/strong> Add callback of barcode processor for receiving barcode after scanning the barcode.<\/span>\u00a0 \u00a0<\/span>\u00a0<\/span><\/p>\n
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Override\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public void release() {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Override\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public void receiveDetections(@NonNull Detector.Detections<Barcode> detections) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0SparseArray<Barcode> barCodes = detections.getDetectedItems();\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (barCodes.size() > 0) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Intent intent = new Intent();\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0intent.putExtra(AppConstants.BARCODE, barCodes.valueAt(0));\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0setResult(CommonStatusCodes.SUCCESS, intent);\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0finish();\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0});<\/pre>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
Barcode is a method of representing data in a visual, machine-readable form. It represents data by varying parallel lines in width and distance. In other words, we can say a barcode is a way to encode information in a visual pattern that a device (a barcode scanner) can read (those black lines and white spaces). […]<\/p>\n","protected":false},"author":1,"featured_media":6528,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[566,14],"class_list":["post-6527","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-android","tag-detect-barcode-using-google-vision-api","tag-innovationm"],"yoast_head":"\nDetect Barcode Using Google Vision API - InnovationM - Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.innovationm.com\/blog\/detect-barcode-using-google-vision-api\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Detect Barcode Using Google Vision API - InnovationM - Blog\" \/>\n<meta property=\"og:description\" content=\"Barcode is a method of representing data in a visual, machine-readable form. 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It represents data by varying parallel lines in width and distance. In other words, we can say a barcode is a way to encode information in a visual pattern that a device (a barcode scanner) can read (those black lines and white spaces). 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