title: Reading 3 of 9 extended bar codes using zxing - in Android
body: <p>I am working on replacing an expensive set of bespoke bar code readers with a nice and simple android app.</p>
  
  <p>I am calling the zxing package, and am able to read most bar codes, apart from Code 3 of 9 extended, which is the current standard barcode in our business (with over 2000 barcodes already in circulation).</p>
  
  <p>Is there a way of extending the zxing package to include Code 3 of 9 Extended bar codes??</p>
  
  <p>My current code, which opens the google goggles app and successfully displays QR code and most 1D barcodes information via a Toast call, and I have tried explicitly defining which codes to read but have commented that line out as without it, the scanner should read all possible codes (just for testing):</p>
  
  <pre><code>mGetScanButton = (Button) findViewById(R.id.buttonScan);
  mGetScanButton.setOnClickListener(new View.OnClickListener() {
  
  
          @Override
          public void onClick(View v) {
               Intent intent = new Intent("com.google.zxing.client.android.SCAN");
                  //intent.putExtra("SCAN_FORMATS", "CODE_39,CODE_93,CODE_128,DATA_MATRIX,ITF,CODABAR,EAN_13,EAN_8,UPC_A,QR_CODE" );
                  startActivityForResult(intent, 0);
          }
  
  });
  
  public void onActivityResult(int requestCode, int resultCode, Intent intent) {
      if (requestCode == 0) {
          if (resultCode == RESULT_OK) {
              //  The Intents Fairy has delivered us some data!
              String contents = intent.getStringExtra("SCAN_RESULT");
              //code below will be deleted after testing
              //String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
              // Toast call to display code when read
              Toast.makeText(this, contents, Toast.LENGTH_LONG).show();
              // Handle successful scan
          } else if (resultCode == RESULT_CANCELED) {
              // Handle cancel
          }
      }
  
  }
  </code></pre>
  
  <p>Your assistance is much appreciated, I would prefer not to ask the staff to replace all the bar codes... although this may be required!</p>
  
  <p>Example of Code 39 extended - encoded number = <em>25</em></p>
  
  <p><img src="https://i.stack.imgur.com/LzSpS.jpg" alt=" "></p>
  
  <p>EDIT : My app is actually opening the Google Goggle app rather than the Barcode Scanner app from zxing!  I have now installed the correct Barcode Scanner app, and it works.  Many thanks all!</p>