scanBarcodes returns undefined upon scanning a QR code about vision-camera-code-scanner

[SirFitz]

I addressed the issues using patch-package, the google mlkit dependency route changed and I also made some updates to the Android SDK versions and dependency versions for compatibility:

diff --git a/node_modules/vision-camera-code-scanner/android/build.gradle b/node_modules/vision-camera-code-scanner/android/build.gradle
index b6bd964..4567cfb 100644
--- a/node_modules/vision-camera-code-scanner/android/build.gradle
+++ b/node_modules/vision-camera-code-scanner/android/build.gradle
@@ -18,11 +18,11 @@ def safeExtGet(prop, fallback) {
 }
 
 android {
-    compileSdkVersion safeExtGet('VisionCameraCodeScanner_compileSdkVersion', 30)
+    compileSdkVersion safeExtGet('compileSdkVersion', 30)
     ndkVersion "21.4.7075529"
     defaultConfig {
-        minSdkVersion safeExtGet('VisionCameraCodeScanner_minSdkVersion', 21)
-        targetSdkVersion safeExtGet('VisionCameraCodeScanner_targetSdkVersion', 31)
+        minSdkVersion safeExtGet('minSdkVersion', 21)
+        targetSdkVersion safeExtGet('targetSdkVersion', 31)
         versionCode 1
         versionName "1.0"
 
@@ -56,6 +56,6 @@ dependencies {
     //noinspection GradleDynamicVersion
     implementation "com.facebook.react:react-native:+"  // From node_modules
     api project(":react-native-vision-camera")
-    implementation "androidx.camera:camera-core:1.1.0-alpha06"
-    implementation 'com.google.mlkit:barcode-scanning:17.0.0'
+    implementation "androidx.camera:camera-core:1.1.0-alpha08"
+    implementation 'com.google.mlkit:barcode-scanning:17.0.2'
 }
diff --git a/node_modules/vision-camera-code-scanner/android/src/main/java/com/visioncameracodescanner/BarcodeConverter.java b/node_modules/vision-camera-code-scanner/android/src/main/java/com/visioncameracodescanner/BarcodeConverter.java
index 74e208b..eb4ed07 100644
--- a/node_modules/vision-camera-code-scanner/android/src/main/java/com/visioncameracodescanner/BarcodeConverter.java
+++ b/node_modules/vision-camera-code-scanner/android/src/main/java/com/visioncameracodescanner/BarcodeConverter.java
@@ -7,7 +7,7 @@ import androidx.annotation.NonNull;
 
 import com.facebook.react.bridge.WritableNativeArray;
 import com.facebook.react.bridge.WritableNativeMap;
-import com.google.mlkit.vision.barcode.Barcode;
+import com.google.mlkit.vision.barcode.common.Barcode;
 
 import java.util.List;
 
diff --git a/node_modules/vision-camera-code-scanner/android/src/main/java/com/visioncameracodescanner/VisionCameraCodeScannerPlugin.java b/node_modules/vision-camera-code-scanner/android/src/main/java/com/visioncameracodescanner/VisionCameraCodeScannerPlugin.java
index 8198564..a3adafd 100644
--- a/node_modules/vision-camera-code-scanner/android/src/main/java/com/visioncameracodescanner/VisionCameraCodeScannerPlugin.java
+++ b/node_modules/vision-camera-code-scanner/android/src/main/java/com/visioncameracodescanner/VisionCameraCodeScannerPlugin.java
@@ -24,7 +24,7 @@ import androidx.camera.core.ImageProxy;
 import com.google.android.gms.tasks.Tasks;
 import com.mrousavy.camera.frameprocessor.FrameProcessorPlugin;
 import com.google.android.gms.tasks.Task;
-import com.google.mlkit.vision.barcode.Barcode;
+import com.google.mlkit.vision.barcode.common.Barcode;
 import com.google.mlkit.vision.barcode.BarcodeScanner;
 import com.google.mlkit.vision.barcode.BarcodeScanning;
 import com.google.mlkit.vision.barcode.BarcodeScannerOptions;

[VictorPulzz]

Same error

[matavera]

I am having the same error

[jadonshubham]

@SirFitz Thanks for help. I was also facing same issue.

Also for me only updating below fixed the issue.
implementation 'com.google.mlkit:barcode-scanning:17.0.0' to implementation 'com.google.mlkit:barcode-scanning:17.0.2' in build.gradle
and
Its imports in BarcodeConverter.java and VisionCameraCodeScannerPlugin.java
import com.google.mlkit.vision.barcode.Barcode; to import com.google.mlkit.vision.barcode.common.Barcode;

[OnurGuersoy]

Why not creating a PR for the patch?

[jadonshubham]

@OnurGuersoy This issue is project specific. I guess.
As for one of my projects this was happening and applying above fix resolved it.

But when i tried same on react native boilerplate repo with same versions( of react-native, vision-camera, reanimated and code-scanner-plugin), there it was working fine.

So, not sure if PR is even required for patch.