How to read barcodes with the camera on Android

Question

I want my application to recognize barcodes taken by camera  Is it possible using Android SDK   Something like this  Barcode Scanner

User · Answer

There are two parts in building barcode scanning feature, one capturing barcode image using camera and second extracting barcode value from the image.

Barcode image can be captured from your app using camera app and barcode value can be extracted using Firebase Machine Learning Kit barcode scanning API.

Here is an example app https://www.zoftino.com/android-barcode-scanning-example

User · Answer

module app    implementation  com google zxing core 3 2 1   implementation  com journeyapps zxing-android-embedded 3 2 0 aar       AndroidManifest xml    lt uses-permission android name  android permission CAMERA    gt   lt uses-feature android name  android hardware camera    gt   lt uses-feature android name  android hardware camera autofocus   gt       MainActivity java   public class MainActivity extends AppCompatActivity        Button BarCode        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main            BarCode   findViewById R id button barcode           final Activity activity   this           BarCode setOnClickListener new View OnClickListener                  Override             public void onClick View v                     IntentIntegrator intentIntegrator   new IntentIntegrator activity                   intentIntegrator setDesiredBarcodeFormats intentIntegrator ALL CODE TYPES                   intentIntegrator setBeepEnabled false                   intentIntegrator setCameraId 0                   intentIntegrator setPrompt  SCAN                    intentIntegrator setBarcodeImageEnabled false                   intentIntegrator initiateScan                                          Override     protected void onActivityResult int requestCode  int resultCode  Intent data             IntentResult Result   IntentIntegrator parseActivityResult requestCode   resultCode  data           if Result    null               if Result getContents      null                   Log d  MainActivity     cancelled scan                    Toast makeText this   cancelled   Toast LENGTH SHORT  show                              else                   Log d  MainActivity     Scanned                    Toast makeText this  Scanned - gt      Result getContents    Toast LENGTH SHORT  show                                    else               super onActivityResult requestCode   resultCode   data

User · Answer

Here is sample code using camera api  import android support v7 app AppCompatActivity  import android os Bundle  import android util Log  import android util SparseArray  import android view SurfaceHolder  import android view SurfaceView  import android view View  import android widget Button  import android widget TextView  import java io IOException  import com google android gms vision CameraSource  import com google android gms vision Detector  import com google android gms vision Frame  import com google android gms vision barcode Barcode  import com google android gms vision barcode BarcodeDetector   public class MainActivity extends AppCompatActivity    TextView barcodeInfo  SurfaceView cameraView  CameraSource cameraSource    Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main        cameraView    SurfaceView  findViewById R id camera view         barcodeInfo    TextView  findViewById R id txtContent         BarcodeDetector barcodeDetector               new BarcodeDetector Builder this                       setBarcodeFormats Barcode CODE 128   QR CODE                       build         cameraSource   new CameraSource              Builder this  barcodeDetector               setRequestedPreviewSize 640  480               build         cameraView getHolder   addCallback new SurfaceHolder Callback              Override         public void surfaceCreated SurfaceHolder holder                 try                   cameraSource start cameraView getHolder                   catch  IOException ie                    Log e  CAMERA SOURCE   ie getMessage                                       Override         public void surfaceChanged SurfaceHolder holder  int format  int width  int height                        Override         public void surfaceDestroyed SurfaceHolder holder                cameraSource stop                            barcodeDetector setProcessor new Detector Processor lt Barcode gt               Override         public void release                         Override         public void receiveDetections Detector Detections lt Barcode gt  detections                 final SparseArray lt Barcode gt  barcodes   detections getDetectedItems                 if  barcodes size      0                    barcodeInfo post new Runnable           Use the post method of the TextView                     public void run                             barcodeInfo setText        Update the TextView                                 barcodes valueAt 0  displayValue                                                                                                            activity main xml   lt  xml version  1 0  encoding  utf-8   gt   lt RelativeLayout xmlns android  http   schemas android com apk res android  xmlns tools  http   schemas android com tools  android layout width  match parent  android layout height  match parent  android paddingBottom   dimen activity vertical margin  android paddingLeft   dimen activity horizontal margin  android paddingRight   dimen activity horizontal margin  android paddingTop   dimen activity vertical margin  tools context  com example gateway cameraapibarcode MainActivity  gt    lt LinearLayout     android layout width  wrap content      android layout height  wrap content      android orientation  vertical  gt        lt SurfaceView         android layout width  640px          android layout height  480px          android layout centerVertical  true          android layout alignParentLeft  true          android id    id camera view   gt        lt TextView         android text   code reader          android layout width  wrap content          android layout height  wrap content          android id    id txtContent   gt       lt Button         android layout width  wrap content          android layout height  wrap content          android text  Process          android id    id button          android layout alignParentTop  true          android layout alignParentStart  true    gt       lt ImageView         android layout width  wrap content          android layout height  wrap content          android id    id imgview   gt   lt  LinearLayout gt   lt  RelativeLayout gt    build gradle Module app   add  compile  com google android gms play-services 7 8    in dependencies

User · Answer

I had an issue with the parseActivityForResult arguments  I got this to work   package JMA BarCodeScanner   import android app Activity  import android content Intent  import android os Bundle  import android util Log  import android view View  import android widget Button  import android widget TextView   public class JMABarcodeScannerActivity extends Activity        Button captureButton      TextView tvContents      TextView tvFormat      Activity activity        Override     public void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout main            activity   this          captureButton    Button findViewById R id capture           captureButton setOnClickListener listener           tvContents    TextView findViewById R id tvContents           tvFormat    TextView findViewById R id tvFormat              public void onActivityResult int requestCode  int resultCode  Intent intent                   switch  requestCode                         case IntentIntegrator REQUEST CODE              if  resultCode    Activity RESULT OK                                 IntentResult intentResult   IntentIntegrator parseActivityResult requestCode  resultCode  intent                    if  intentResult    null                                        String contents   intentResult getContents                       String format   intentResult getFormatName                       tvContents setText contents toString                        tvFormat setText format toString                           this elemQuery setText contents                        this resume   false                     Log d  SEARCH EAN    OK  EAN      contents      FORMAT      format                     else                       Log e  SEARCH EAN    IntentResult je NULL                                                  else if  resultCode    Activity RESULT CANCELED                    Log e  SEARCH EAN    CANCEL                                       private View OnClickListener listener   new View OnClickListener              Override         public void onClick View v                 IntentIntegrator integrator   new IntentIntegrator activity                integrator initiateScan                         Latyout for Activity    lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout xmlns android  http   schemas android com apk res android      android orientation  vertical      android layout width  fill parent      android layout height  fill parent  gt       lt Button         android id    id capture          android layout width  fill parent          android layout height  wrap content          android text  Take a Picture   gt        lt TextView xmlns android  http   schemas android com apk res android          android id    id tvContents          android layout width  wrap content          android layout height  wrap content   gt        lt TextView xmlns android  http   schemas android com apk res android          android id    id tvFormat          android layout width  wrap content          android layout height  wrap content   gt   lt  LinearLayout gt

User · Answer

2016 update  With the latest release of Google Play Services  v7 8  you have access to the new Mobile Vision API  That s probably the most convenient way to implement barcode scanning now  and it also works offline   From the Android Barcode API      The Barcode API detects barcodes in real-time  on device  in any orientation  It can also detect multiple barcodes at once       It reads the following barcode formats          1D barcodes  EAN-13  EAN-8  UPC-A  UPC-E  Code-39  Code-93  Code-128  ITF  Codabar   2D barcodes  QR Code  Data Matrix  PDF-417  AZTEC         It automatically parses QR Codes  Data Matrix  PDF-417  and Aztec values  for the following supported formats          URL   Contact information  VCARD  etc     Calendar event   Email   Phone   SMS   ISBN   WiFi   Geo-location  latitude and longitude    AAMVA driver license ID

User · Answer

It s not built into the SDK  but you can use the Zxing library  It s free  open source  and Apache-licensed   The 2016 recommendation is to use the Barcode API  which also works offline

User · Answer

Here is a sample code  my app uses ZXing Barcode Scanner    You need these 2 classes  IntentIntegrator and IntentResult Call scanner  e g  OnClickListener  OnMenuItemSelected       PRODUCT MODE  - it scans standard 1D barcodes  you can add more     IntentIntegrator initiateScan this               Warning                ZXing Barcode Scanner is not installed  download                Yes    No               PRODUCT MODE     Get barcode as a result   public void onActivityResult int requestCode  int resultCode  Intent intent        switch  requestCode      case IntentIntegrator REQUEST CODE       if  resultCode    Activity RESULT OK             IntentResult intentResult               IntentIntegrator parseActivityResult requestCode  resultCode  intent            if  intentResult    null                String contents   intentResult getContents               String format   intentResult getFormatName                this elemQuery setText contents              this resume   false             Log d  SEARCH EAN    OK  EAN      contents      FORMAT      format             else              Log e  SEARCH EAN    IntentResult je NULL                      else if  resultCode    Activity RESULT CANCELED            Log e  SEARCH EAN    CANCEL                    contents holds barcode number

User · Answer

With Google Firebase ML Kit s barcode scanning API  you can read data encoded using most standard barcode formats   https   firebase google com docs ml-kit read-barcodes authuser 0  You can follow this link to read barcodes efficiently

User · Answer

You can also use barcodefragmentlib which is an extension of zxing but provides barcode scanning as fragment library  so can be very easily integrated   Here is the supporting documentation for usage of library

[android] How to read barcodes with the camera on Android?

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