ZXing dual image / overlay after scanning

Question

I am using the ZXing library, fully integrated with jar files, in an Android application and have the following problem:

Problem:

After scanning the barcode, the scanned image remains on top of the live video with a frequency of about 50% for about 1-2 seconds.

Question:

Is there a way to show only a scanned image with 0% transparency, instead of a weird overlay? Or, better yet, can it show a custom snippet?

Thanks.

Code: [without related parts]

public static void initiateScan(Fragment fragment) { IntentIntegrator ii = new IntentIntegrator(fragment); DisplayMetrics dm = fragment.getResources().getDisplayMetrics(); ii.addExtra("SCAN_WIDTH", dm.heightPixels); ii.addExtra("SCAN_HEIGHT", dm.widthPixels / 4); ii.addExtra("SCAN_MODE", "ONE_D_MODE"); List<String> c = new ArrayList<String>(); c.add("CODE_39"); ii.initiateScan(c, -1); } public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if(requestCode==IntentIntegrator.REQUEST_CODE) { // scan from ZXing String raw_vin=null; String vin = null; boolean success=false; IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data); if(result!=null) { String content = result.getContents(); if(content!=null) { raw_vin=content; vin=raw_vin; success=true; } } } } 

Example:

Answer 1

Here is what I found in the build.gradle file for dependencies:

 compile 'com.google.zxing:core:3.2.1' compile 'com.journeyapps:zxing-android-embedded: 3.0.3@aar ' 

Try in the initiateScan method:

 public static void initiateScan(Fragment fragment) { IntentIntegrator ii = IntentIntegrator.forSupportFragment(fragment); DisplayMetrics dm = fragment.getResources().getDisplayMetrics(); ii.addExtra("SCAN_WIDTH", dm.heightPixels); ii.addExtra("SCAN_HEIGHT", dm.widthPixels / 4); ii.addExtra("SCAN_MODE", "ONE_D_MODE"); ii.initiateScan(Collections.singletonList("CODE_39")); } 

Let me know how it works for you.

Answer 2

I can’t explain why this problem occurs, but I use ZXing for my barcode scanner application without 50% transparency, just like you. The following is my solution:

Markup:

 <com.journeyapps.barcodescanner.CompoundBarcodeView android:id="@+id/barcode_scanner" android:layout_width="match_parent" android:layout_height="200dp" android:layout_margin="2dp"> </com.journeyapps.barcodescanner.CompoundBarcodeView> 

In the fragment:

 private CompoundBarcodeView barcodeView; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (container == null) { return null; } View v = inflater.inflate(R.layout.webservice_layout, container, false); barcodeView = (CompoundBarcodeView) v.findViewById(R.id.barcode_scanner); barcodeView.decodeContinuous(callback); ...... } 

Callback function:

 private BarcodeCallback callback = new BarcodeCallback() { @Override public void barcodeResult(BarcodeResult result) { if (SOAP_ACTION.equals("") || SOAP_METHOD.equals("") || soapProperty.equals("")) { barcodeView.pause(); } else { if (result.getText() != null) { barcodeView.setStatusText(result.getText()); barcodeView.pause(); new Handler().postDelayed(new Runnable() { @Override public void run() { barcodeView.resume(); } }, 1000); } } } }; 

Hope this help!

Answer 3

My approach is as follows:

 //start the scanning public void startQRCodeScanning() { IntentIntegrator integrator = IntentIntegrator.forFragment(this); integrator.setCaptureActivity(ScanActivity); integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES); integrator.setBeepEnabled(false); integrator.setOrientationLocked(true); integrator.initiateScan(); } //onActivityResult: @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data); if (result != null) { if (result.getContents() == null) { Log.d(TAG, "Cancelled scan"); //we want to finish the current activity //as it does not make sense to do anything else finishActivity(); } else { Log.d(TAG, "Scanned " + result.getContents()); setConnectionString(result.getContents()); } } else { super.onActivityResult(requestCode, resultCode, data); } } //next I have the QRCodeScanningActivity public class QRCodeScannerActivity extends Activity { private CaptureManager capture; private CompoundBarcodeView barcodeScannerView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_custom_scanner); if (getResources().getBoolean(R.bool.portrait_only)) { setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); } ActionBar actionBar = getActionBar(); if (actionBar != null) { actionBar.setDisplayOptions(ActionBar.DISPLAY_HOME_AS_UP, ActionBar.DISPLAY_HOME_AS_UP); } barcodeScannerView = (CompoundBarcodeView)findViewById(R.id.zxing_barcode_scanner); capture = new CaptureManager(this, barcodeScannerView); capture.initializeFromIntent(getIntent(), savedInstanceState); capture.decode(); } @Override protected void onResume() { super.onResume(); capture.onResume(); } @Override protected void onPause() { super.onPause(); capture.onPause(); } @Override protected void onDestroy() { super.onDestroy(); capture.onDestroy(); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); capture.onSaveInstanceState(outState); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { return barcodeScannerView.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { onBackPressed(); return true; } return super.onOptionsItemSelected(item); } } //Next you need to define the layouts and everything. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/black"> <com.journeyapps.barcodescanner.CompoundBarcodeView android:id="@+id/zxing_barcode_scanner" android:layout_width="match_parent" android:layout_height="match_parent" app:zxing_scanner_layout="@layout/barcode_scanner_layout"/> </FrameLayout> </RelativeLayout>