From 0a05674f2ff497d49c9fe13383221fe3047bb903 Mon Sep 17 00:00:00 2001
From: f321x <f@f321x.com>
Date: Tue, 24 Jun 2025 17:38:03 +0200
Subject: [PATCH 1/3] android: replace qr code scanning library

Replaces the unmaintained and unreliable
`me.dm7.barcodescanner:zxing:1.9.8` qr code scanning library used only
on android with the `com.github.markusfisch:BarcodeScannerView:1.6.0`
(https://github.com/markusfisch/BarcodeScannerView) library which seems
more actively maintained.
The `BarcodeScannerView` library is incredibly fast and scanning qr
codes is now fun again :)

wip: still looking into ways to pin the library.
---
 contrib/android/buildozer_qml.spec            |  6 +++-
 .../electrum/qr/SimpleScannerActivity.java    | 30 +++++++++----------
 2 files changed, 19 insertions(+), 17 deletions(-)

diff --git a/contrib/android/buildozer_qml.spec b/contrib/android/buildozer_qml.spec
index 7e0d32330..59da3d80e 100644
--- a/contrib/android/buildozer_qml.spec
+++ b/contrib/android/buildozer_qml.spec
@@ -160,9 +160,13 @@ android.add_jars = .buildozer/android/platform/*/build/libs_collections/Electrum
 # directory containing the files)
 android.add_src = electrum/gui/qml/java_classes/
 
+# (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
+# e.g. android.gradle_repositories = maven { url "https://repo.spring.io/release" }
+android.add_gradle_repositories = maven { url "https://jitpack.io" }
+
 android.gradle_dependencies =
     com.android.support:support-compat:28.0.0,
-    me.dm7.barcodescanner:zxing:1.9.8
+    com.github.markusfisch:BarcodeScannerView:1.6.0
 
 android.add_activities = org.electrum.qr.SimpleScannerActivity
 
diff --git a/electrum/gui/qml/java_classes/org/electrum/qr/SimpleScannerActivity.java b/electrum/gui/qml/java_classes/org/electrum/qr/SimpleScannerActivity.java
index 0f356719f..71e2785c0 100644
--- a/electrum/gui/qml/java_classes/org/electrum/qr/SimpleScannerActivity.java
+++ b/electrum/gui/qml/java_classes/org/electrum/qr/SimpleScannerActivity.java
@@ -20,17 +20,15 @@ import androidx.core.app.ActivityCompat;
 
 import java.util.Arrays;
 
-import me.dm7.barcodescanner.zxing.ZXingScannerView;
+import de.markusfisch.android.barcodescannerview.widget.BarcodeScannerView;
 
-import com.google.zxing.Result;
-import com.google.zxing.BarcodeFormat;
 
 import org.electrum.electrum.res.R; // package set in build.gradle
 
-public class SimpleScannerActivity extends Activity implements ZXingScannerView.ResultHandler {
+public class SimpleScannerActivity extends Activity {
     private static final int MY_PERMISSIONS_CAMERA = 1002;
 
-    private ZXingScannerView mScannerView = null;
+    private BarcodeScannerView mScannerView = null;
     final String TAG = "org.electrum.SimpleScannerActivity";
 
     private boolean mAlreadyRequestedPermissions = false;
@@ -85,23 +83,23 @@ public class SimpleScannerActivity extends Activity implements ZXingScannerView.
     public void onPause() {
         super.onPause();
         if (null != mScannerView) {
-            mScannerView.stopCamera();           // Stop camera on pause
+            mScannerView.close();  // Stop camera on pause
         }
     }
 
     private void startCamera() {
-        mScannerView = new ZXingScannerView(this);
-        mScannerView.setFormats(Arrays.asList(BarcodeFormat.QR_CODE));
+        mScannerView = new BarcodeScannerView(this);
+        mScannerView.setCropRatio(0.75f); // Set crop ratio to 75% (this defines the square area shown in the scanner view)
+        // by default only Format.QR_CODE is set
         ViewGroup contentFrame = (ViewGroup) findViewById(R.id.content_frame);
         contentFrame.addView(mScannerView);
-        mScannerView.setResultHandler(this);         // Register ourselves as a handler for scan results.
-        mScannerView.startCamera();                  // Start camera on resume
-    }
-
-    @Override
-    public void handleResult(Result rawResult) {
-        //resultIntent.putExtra("format", rawResult.getBarcodeFormat().toString());
-        this.setResultAndClose(rawResult.getText());
+        mScannerView.setOnBarcodeListener(result -> {
+            // Handle the scan result
+            this.setResultAndClose(result.getText());
+            // Return false to stop scanning after first result
+            return false;
+        });
+        mScannerView.openAsync();  // Start camera on resume
     }
 
     private void setResultAndClose(String resultText) {

From 5ae2deb7048fec246cde7e97ac4cf640dbf7d0e9 Mon Sep 17 00:00:00 2001
From: f321x <f@f321x.com>
Date: Wed, 25 Jun 2025 13:50:48 +0200
Subject: [PATCH 2/3] android: shasum pin barcode scanner

pins the barcode scanner aar used in the android build and its 2
dependencies to a sha256 hash using a script `fetch_barcode_scanner.sh`
which is called in the process of building the apk by `make_apk.sh`.
It fetches the 3 aar files if not already existing, puts them in
`/contrib/android/aars` and verifies their shasum against the hardcoded
hashes in `fetch_barcode_scanner.sh`.
---
 .gitignore                               |  1 +
 contrib/android/buildozer_qml.spec       | 13 +++---
 contrib/android/fetch_barcode_scanner.sh | 50 ++++++++++++++++++++++++
 contrib/android/make_apk.sh              |  4 ++
 4 files changed, 63 insertions(+), 5 deletions(-)
 create mode 100755 contrib/android/fetch_barcode_scanner.sh

diff --git a/.gitignore b/.gitignore
index 9f013f3c7..0cb917442 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,6 +39,7 @@ contrib/build-linux/appimage/.cache/
 contrib/osx/.cache/
 contrib/osx/build-venv/
 contrib/android/android_debug.keystore
+contrib/android/.cache/
 contrib/secp256k1/
 contrib/zbar/
 contrib/libusb/
diff --git a/contrib/android/buildozer_qml.spec b/contrib/android/buildozer_qml.spec
index 59da3d80e..a0e4e6709 100644
--- a/contrib/android/buildozer_qml.spec
+++ b/contrib/android/buildozer_qml.spec
@@ -156,17 +156,20 @@ android.accept_sdk_license = True
 android.add_jars = .buildozer/android/platform/*/build/libs_collections/Electrum/jar/*.jar
 
 
+android.add_aars =
+    contrib/android/.cache/aars/BarcodeScannerView.aar,
+    contrib/android/.cache/aars/CameraView.aar,
+    contrib/android/.cache/aars/zxing-cpp.aar
+
+
 # (list) List of Java files to add to the android project (can be java or a
 # directory containing the files)
 android.add_src = electrum/gui/qml/java_classes/
 
-# (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
-# e.g. android.gradle_repositories = maven { url "https://repo.spring.io/release" }
-android.add_gradle_repositories = maven { url "https://jitpack.io" }
-
+# kotlin-stdlib is required for zxing-cpp (BarcodeScannerView)
 android.gradle_dependencies =
     com.android.support:support-compat:28.0.0,
-    com.github.markusfisch:BarcodeScannerView:1.6.0
+    org.jetbrains.kotlin:kotlin-stdlib:1.8.22
 
 android.add_activities = org.electrum.qr.SimpleScannerActivity
 
diff --git a/contrib/android/fetch_barcode_scanner.sh b/contrib/android/fetch_barcode_scanner.sh
new file mode 100755
index 000000000..ce6056aec
--- /dev/null
+++ b/contrib/android/fetch_barcode_scanner.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+
+# script to fetch and pin https://github.com/markusfisch/BarcodeScannerView and its dependencies,
+# https://github.com/markusfisch/CameraView/ and https://github.com/markusfisch/zxing-cpp
+# which are being used as barcode scanner in the Android app.
+
+# To bump the version of BarcodeScannerView, get the newest version tag from the github repo,
+# then get the required dependencies from
+# https://jitpack.io/com/github/markusfisch/BarcodeScannerView/**NEWEST_VERSION**/BarcodeScannerView-**NEWEST_VERSION**.pom
+# then fetch the aars from jitpack and update the versions and sha256s below. Also update kotlin-stdlib
+# in buildozer_qml.spec
+
+BARCODE_SCANNER_VIEW_VERSION="1.6.0"
+BARCODE_SCANNER_VIEW_AAR_SHA256="2be6c9a5ab86f7198683af4a6c0e5acd3e8fe6a02df2d12c3b716dc422537789"
+
+CAMERA_VIEW_VERSION="1.9.2"
+CAMERA_VIEW_AAR_SHA256="3c9be35d29b84637d2a2b0e0e7253bc5a35408fafb26c5cb7225aeb7326e2be4"
+
+ZXING_CPP_VERSION="v2.2.0.1"
+ZXING_CPP_AAR_SHA256="7991381f181ff16555c4ac9c5d83e6a0d3a7da896efb8c3807897305ca33b957"
+
+DOWNLOAD_REPOSITORY_ROOT="https://jitpack.io/com/github/markusfisch"
+
+set -e
+
+CONTRIB_ANDROID="$(dirname "$(readlink -e "$0")")"
+CONTRIB="$CONTRIB_ANDROID"/..
+CACHEDIR="$CONTRIB_ANDROID/.cache"
+
+. "$CONTRIB"/build_tools_util.sh
+
+# check if $CACHEDIR/aars exists, create it if not
+if [ ! -d "$CACHEDIR/aars" ]; then
+    mkdir -p "$CACHEDIR/aars"
+fi
+
+info "Fetching BarcodeScannerView..."
+download_if_not_exist "$CACHEDIR/aars/BarcodeScannerView.aar" \
+    "${DOWNLOAD_REPOSITORY_ROOT}/BarcodeScannerView/${BARCODE_SCANNER_VIEW_VERSION}/BarcodeScannerView-${BARCODE_SCANNER_VIEW_VERSION}.aar"
+verify_hash "$CACHEDIR/aars/BarcodeScannerView.aar" "$BARCODE_SCANNER_VIEW_AAR_SHA256"
+
+info "Fetching CameraView..."
+download_if_not_exist "$CACHEDIR/aars/CameraView.aar" \
+    "${DOWNLOAD_REPOSITORY_ROOT}/CameraView/${CAMERA_VIEW_VERSION}/CameraView-${CAMERA_VIEW_VERSION}.aar"
+verify_hash "$CACHEDIR/aars/CameraView.aar" "$CAMERA_VIEW_AAR_SHA256"
+
+info "Fetching zxing-cpp..."
+download_if_not_exist "$CACHEDIR/aars/zxing-cpp.aar" \
+    "${DOWNLOAD_REPOSITORY_ROOT}/zxing-cpp/${ZXING_CPP_VERSION}/zxing-cpp-${ZXING_CPP_VERSION}.aar"
+verify_hash "$CACHEDIR/aars/zxing-cpp.aar" "$ZXING_CPP_AAR_SHA256"
diff --git a/contrib/android/make_apk.sh b/contrib/android/make_apk.sh
index 0eb245c91..11b5ad89c 100755
--- a/contrib/android/make_apk.sh
+++ b/contrib/android/make_apk.sh
@@ -27,6 +27,10 @@ info "preparing electrum-locale."
     rm -r "$PROJECT_ROOT/electrum/locale/locale"/*/electrum.po
 )
 
+# fetch barcode scanner aars
+info "fetching barcode scanner aars."
+"$CONTRIB_ANDROID"/fetch_barcode_scanner.sh || fail "fetch_barcode_scanner.sh failed"
+
 pushd "$CONTRIB_ANDROID"
 
 info "apk building phase starts."

From 10b75ebed7e8d0594ded4709cc40e8c840fce6a3 Mon Sep 17 00:00:00 2001
From: f321x <f@f321x.com>
Date: Thu, 26 Jun 2025 15:42:49 +0200
Subject: [PATCH 3/3] android: build BarcodeScannerView from src

Adds a script `make_barcode_scanner.sh` which builds the
`BarcodeScannerView` library and its dependencies, `zxing-cpp` and
`CameraView` from source. Builds `zxing-cpp` architecture dependent
reducing the final apk size.
---
 contrib/android/fetch_barcode_scanner.sh |  50 --------
 contrib/android/make_apk.sh              |  10 +-
 contrib/android/make_barcode_scanner.sh  | 144 +++++++++++++++++++++++
 contrib/build_tools_util.sh              |  22 ++++
 4 files changed, 172 insertions(+), 54 deletions(-)
 delete mode 100755 contrib/android/fetch_barcode_scanner.sh
 create mode 100755 contrib/android/make_barcode_scanner.sh

diff --git a/contrib/android/fetch_barcode_scanner.sh b/contrib/android/fetch_barcode_scanner.sh
deleted file mode 100755
index ce6056aec..000000000
--- a/contrib/android/fetch_barcode_scanner.sh
+++ /dev/null
@@ -1,50 +0,0 @@
-#!/bin/bash
-
-# script to fetch and pin https://github.com/markusfisch/BarcodeScannerView and its dependencies,
-# https://github.com/markusfisch/CameraView/ and https://github.com/markusfisch/zxing-cpp
-# which are being used as barcode scanner in the Android app.
-
-# To bump the version of BarcodeScannerView, get the newest version tag from the github repo,
-# then get the required dependencies from
-# https://jitpack.io/com/github/markusfisch/BarcodeScannerView/**NEWEST_VERSION**/BarcodeScannerView-**NEWEST_VERSION**.pom
-# then fetch the aars from jitpack and update the versions and sha256s below. Also update kotlin-stdlib
-# in buildozer_qml.spec
-
-BARCODE_SCANNER_VIEW_VERSION="1.6.0"
-BARCODE_SCANNER_VIEW_AAR_SHA256="2be6c9a5ab86f7198683af4a6c0e5acd3e8fe6a02df2d12c3b716dc422537789"
-
-CAMERA_VIEW_VERSION="1.9.2"
-CAMERA_VIEW_AAR_SHA256="3c9be35d29b84637d2a2b0e0e7253bc5a35408fafb26c5cb7225aeb7326e2be4"
-
-ZXING_CPP_VERSION="v2.2.0.1"
-ZXING_CPP_AAR_SHA256="7991381f181ff16555c4ac9c5d83e6a0d3a7da896efb8c3807897305ca33b957"
-
-DOWNLOAD_REPOSITORY_ROOT="https://jitpack.io/com/github/markusfisch"
-
-set -e
-
-CONTRIB_ANDROID="$(dirname "$(readlink -e "$0")")"
-CONTRIB="$CONTRIB_ANDROID"/..
-CACHEDIR="$CONTRIB_ANDROID/.cache"
-
-. "$CONTRIB"/build_tools_util.sh
-
-# check if $CACHEDIR/aars exists, create it if not
-if [ ! -d "$CACHEDIR/aars" ]; then
-    mkdir -p "$CACHEDIR/aars"
-fi
-
-info "Fetching BarcodeScannerView..."
-download_if_not_exist "$CACHEDIR/aars/BarcodeScannerView.aar" \
-    "${DOWNLOAD_REPOSITORY_ROOT}/BarcodeScannerView/${BARCODE_SCANNER_VIEW_VERSION}/BarcodeScannerView-${BARCODE_SCANNER_VIEW_VERSION}.aar"
-verify_hash "$CACHEDIR/aars/BarcodeScannerView.aar" "$BARCODE_SCANNER_VIEW_AAR_SHA256"
-
-info "Fetching CameraView..."
-download_if_not_exist "$CACHEDIR/aars/CameraView.aar" \
-    "${DOWNLOAD_REPOSITORY_ROOT}/CameraView/${CAMERA_VIEW_VERSION}/CameraView-${CAMERA_VIEW_VERSION}.aar"
-verify_hash "$CACHEDIR/aars/CameraView.aar" "$CAMERA_VIEW_AAR_SHA256"
-
-info "Fetching zxing-cpp..."
-download_if_not_exist "$CACHEDIR/aars/zxing-cpp.aar" \
-    "${DOWNLOAD_REPOSITORY_ROOT}/zxing-cpp/${ZXING_CPP_VERSION}/zxing-cpp-${ZXING_CPP_VERSION}.aar"
-verify_hash "$CACHEDIR/aars/zxing-cpp.aar" "$ZXING_CPP_AAR_SHA256"
diff --git a/contrib/android/make_apk.sh b/contrib/android/make_apk.sh
index 11b5ad89c..2b6ee7360 100755
--- a/contrib/android/make_apk.sh
+++ b/contrib/android/make_apk.sh
@@ -27,10 +27,6 @@ info "preparing electrum-locale."
     rm -r "$PROJECT_ROOT/electrum/locale/locale"/*/electrum.po
 )
 
-# fetch barcode scanner aars
-info "fetching barcode scanner aars."
-"$CONTRIB_ANDROID"/fetch_barcode_scanner.sh || fail "fetch_barcode_scanner.sh failed"
-
 pushd "$CONTRIB_ANDROID"
 
 info "apk building phase starts."
@@ -90,16 +86,22 @@ if [[ "$2" == "all" ]] ; then
     # FIXME failures are not propagated out: we should fail the script if any arch build fails
     export APP_ANDROID_ARCHS=armeabi-v7a
     export APP_ANDROID_NUMERIC_VERSION=$("$CONTRIB_ANDROID"/get_apk_versioncode.py "$APP_ANDROID_ARCHS")
+    "$CONTRIB_ANDROID"/make_barcode_scanner.sh "$APP_ANDROID_ARCHS" || fail "make_barcode_scanner.sh failed"
     make $TARGET
+
     export APP_ANDROID_ARCHS=arm64-v8a
     export APP_ANDROID_NUMERIC_VERSION=$("$CONTRIB_ANDROID"/get_apk_versioncode.py "$APP_ANDROID_ARCHS")
+    "$CONTRIB_ANDROID"/make_barcode_scanner.sh "$APP_ANDROID_ARCHS" || fail "make_barcode_scanner.sh failed"
     make $TARGET
+
     export APP_ANDROID_ARCHS=x86_64
     export APP_ANDROID_NUMERIC_VERSION=$("$CONTRIB_ANDROID"/get_apk_versioncode.py "$APP_ANDROID_ARCHS")
+    "$CONTRIB_ANDROID"/make_barcode_scanner.sh "$APP_ANDROID_ARCHS" || fail "make_barcode_scanner.sh failed"
     make $TARGET
 else
     export APP_ANDROID_ARCHS=$2
     export APP_ANDROID_NUMERIC_VERSION=$("$CONTRIB_ANDROID"/get_apk_versioncode.py "$APP_ANDROID_ARCHS")
+    "$CONTRIB_ANDROID"/make_barcode_scanner.sh "$APP_ANDROID_ARCHS" || fail "make_barcode_scanner.sh failed"
     make $TARGET
 fi
 
diff --git a/contrib/android/make_barcode_scanner.sh b/contrib/android/make_barcode_scanner.sh
new file mode 100755
index 000000000..19df7752e
--- /dev/null
+++ b/contrib/android/make_barcode_scanner.sh
@@ -0,0 +1,144 @@
+#!/bin/bash
+
+# script to clone and build https://github.com/markusfisch/BarcodeScannerView and its dependencies,
+# https://github.com/markusfisch/CameraView/ and https://github.com/markusfisch/zxing-cpp
+# which are being used as barcode scanner in the Android app.
+
+# To bump the version of BarcodeScannerView, get the newest version tag from the github repo,
+# then get the required dependencies from
+# https://github.com/markusfisch/BarcodeScannerView/blob/**VERSION_TAG**/barcodescannerview/build.gradle
+# then update the commit hashes below. Also update kotlin-stdlib in buildozer_qml.spec to the
+# "kotlin-version" specified in the used zxing-cpp commit:
+# https://github.com/markusfisch/zxing-cpp/blob/master/wrappers/aar/build.gradle
+
+
+BARCODE_SCANNER_VIEW_COMMIT_HASH="a4928bf83c0aae8ecb80e665d93f10b70232455b"  # 1.6.3
+BARCODE_SCANNER_VIEW_REPO="https://github.com/markusfisch/BarcodeScannerView.git"
+
+CAMERA_VIEW_COMMIT_HASH="745597d05bc6abfdb3637a09a8ecaf30fdce7b6e"  # 1.10.0
+CAMERA_VIEW_REPO="https://github.com/markusfisch/CameraView.git"
+
+ZXING_CPP_COMMIT_HASH="0741a597409ff69a96a326f3a65fe6440d87ad99"  # v2.2.0.5 using kotlin-stdlib 1.8.22
+ZXING_CPP_REPO="https://github.com/markusfisch/zxing-cpp.git"
+
+
+########################################################################################################
+set -e
+
+CONTRIB_ANDROID="$(dirname "$(readlink -e "$0")")"
+CONTRIB="$CONTRIB_ANDROID"/..
+CACHEDIR="$CONTRIB_ANDROID/.cache"
+BUILDDIR="$CACHEDIR/builds"
+
+. "$CONTRIB"/build_tools_util.sh
+
+# target architecture passed as argument by`make_apk.sh`
+TARGET_ARCH="$1"
+
+# check if TARGET_ARCH is set and supported
+if [[ "$TARGET_ARCH" != "armeabi-v7a" \
+        && "$TARGET_ARCH" != "arm64-v8a" \
+        && "$TARGET_ARCH" != "x86_64" ]]; then
+    fail "build_barcode_scanner.sh invalid target architecture argument: $TARGET_ARCH"
+fi
+
+info "Building BarcodeScannerView and deps for architecture: $TARGET_ARCH"
+
+# check if directories exist, create them if not
+if [ ! -d "$CACHEDIR/aars" ]; then
+    mkdir -p "$CACHEDIR/aars"
+fi
+
+if [ ! -d "$BUILDDIR" ]; then
+    mkdir -p "$BUILDDIR"
+fi
+
+
+####### zxing-cpp ########
+
+# check if zxing-cpp aar is already in cachedir, else build it
+ZXING_CPP_BUILD_ID="$TARGET_ARCH-$ZXING_CPP_COMMIT_HASH"
+if [ -f "$CACHEDIR/aars/zxing-cpp-$ZXING_CPP_BUILD_ID.aar" ]; then
+    info "zxing-cpp for $ZXING_CPP_BUILD_ID already exists in cache, skipping build."
+    cp "$CACHEDIR/aars/zxing-cpp-$ZXING_CPP_BUILD_ID.aar" "$CACHEDIR/aars/zxing-cpp.aar"
+else
+    info "Building zxing-cpp for $ZXING_CPP_BUILD_ID..."
+    ZXING_CPP_DIR="$BUILDDIR/zxing-cpp"
+    clone_or_update_repo "$ZXING_CPP_REPO" "$ZXING_CPP_COMMIT_HASH" "$ZXING_CPP_DIR"
+    cd "$ZXING_CPP_DIR/wrappers/aar"
+    chmod +x gradlew
+
+    # Set local.properties to use SDK of docker container 
+    echo "sdk.dir=${ANDROID_SDK_HOME}" > local.properties
+    # gradlew will install a specific NDK version required by zxing-cpp
+    ./gradlew :zxingcpp:assembleRelease -Pandroid.injected.build.abi="$TARGET_ARCH"
+
+    # Copy the built AAR to cache directory
+    ZXING_AAR_SOURCE="$ZXING_CPP_DIR/wrappers/aar/zxingcpp/build/outputs/aar/zxingcpp-release.aar"
+    ZXING_AAR_DEST_GENERIC="$CACHEDIR/aars/zxing-cpp.aar"
+    ZXING_AAR_DEST_SPECIFIC="$CACHEDIR/aars/zxing-cpp-$ZXING_CPP_BUILD_ID.aar"
+    if [ ! -f "$ZXING_AAR_SOURCE" ]; then
+        fail "zxing-cpp AAR not found at $ZXING_AAR_SOURCE, build failed?"
+    fi
+    cp "$ZXING_AAR_SOURCE" "$ZXING_AAR_DEST_GENERIC"
+    # keeping an arch specific copy allows to skip the build later if it already exists
+    cp "$ZXING_AAR_SOURCE" "$ZXING_AAR_DEST_SPECIFIC"
+    info "zxing-cpp AAR copied to $ZXING_AAR_DEST_GENERIC"
+fi
+
+########### CameraView ###########
+
+CAMERA_VIEW_BUILD_ID="$CAMERA_VIEW_COMMIT_HASH"
+if [ -f "$CACHEDIR/aars/CameraView-$CAMERA_VIEW_BUILD_ID.aar" ]; then
+    info "CameraView AAR already exists in cache, skipping build."
+    cp "$CACHEDIR/aars/CameraView-$CAMERA_VIEW_BUILD_ID.aar" "$CACHEDIR/aars/CameraView.aar"
+else
+    info "Building CameraView..."
+    CAMERA_VIEW_DIR="$BUILDDIR/CameraView"
+    clone_or_update_repo "$CAMERA_VIEW_REPO" "$CAMERA_VIEW_COMMIT_HASH" "$CAMERA_VIEW_DIR"
+    cd "$CAMERA_VIEW_DIR"
+    chmod +x gradlew
+
+    echo "sdk.dir=${ANDROID_SDK_HOME}" > local.properties
+    ./gradlew :cameraview:assembleRelease
+
+    CAMERA_AAR_SOURCE="$CAMERA_VIEW_DIR/cameraview/build/outputs/aar/cameraview-release.aar"
+    CAMERA_AAR_DEST_GENERIC="$CACHEDIR/aars/CameraView.aar"
+    CAMERA_AAR_DEST_SPECIFIC="$CACHEDIR/aars/CameraView-$CAMERA_VIEW_BUILD_ID.aar"
+    if [ ! -f "$CAMERA_AAR_SOURCE" ]; then
+        fail "CameraView AAR not found at $CAMERA_AAR_SOURCE"
+    fi
+    cp "$CAMERA_AAR_SOURCE" "$CAMERA_AAR_DEST_GENERIC"
+    cp "$CAMERA_AAR_SOURCE" "$CAMERA_AAR_DEST_SPECIFIC"
+    info "CameraView AAR copied to $CAMERA_AAR_DEST"
+fi
+
+########### BarcodeScannerView ###########
+
+BARCODE_SCANNER_VIEW_BUILD_ID="$BARCODE_SCANNER_VIEW_COMMIT_HASH"
+if [ -f "$CACHEDIR/aars/BarcodeScannerView-$BARCODE_SCANNER_VIEW_BUILD_ID.aar" ]; then
+    info "BarcodeScannerView AAR already exists in cache, skipping build."
+    cp "$CACHEDIR/aars/BarcodeScannerView-$BARCODE_SCANNER_VIEW_BUILD_ID.aar" "$CACHEDIR/aars/BarcodeScannerView.aar"
+else
+    info "Building BarcodeScannerView..."
+    BARCODE_SCANNER_VIEW_DIR="$BUILDDIR/BarcodeScannerView"
+    clone_or_update_repo "$BARCODE_SCANNER_VIEW_REPO" "$BARCODE_SCANNER_VIEW_COMMIT_HASH" "$BARCODE_SCANNER_VIEW_DIR"
+    cd "$BARCODE_SCANNER_VIEW_DIR"
+    chmod +x gradlew
+
+    echo "sdk.dir=${ANDROID_SDK_HOME}" > local.properties
+    ./gradlew :barcodescannerview:assembleRelease
+
+    BARCODE_AAR_SOURCE="$BARCODE_SCANNER_VIEW_DIR/barcodescannerview/build/outputs/aar/barcodescannerview-release.aar"
+    BARCODE_AAR_DEST_GENERIC="$CACHEDIR/aars/BarcodeScannerView.aar"
+    BARCODE_AAR_DEST_SPECIFIC="$CACHEDIR/aars/BarcodeScannerView-$BARCODE_SCANNER_VIEW_BUILD_ID.aar"
+    if [ ! -f "$BARCODE_AAR_SOURCE" ]; then
+        fail "BarcodeScannerView AAR not found at $BARCODE_AAR_SOURCE"
+    fi
+    cp "$BARCODE_AAR_SOURCE" "$BARCODE_AAR_DEST_GENERIC"
+    cp "$BARCODE_AAR_SOURCE" "$BARCODE_AAR_DEST_SPECIFIC"
+    info "BarcodeScannerView AAR copied to $BARCODE_AAR_DEST"
+fi
+
+
+info "All barcode scanner libraries built successfully for $TARGET_ARCH"
diff --git a/contrib/build_tools_util.sh b/contrib/build_tools_util.sh
index cc2a0cb8c..aab00efdd 100755
--- a/contrib/build_tools_util.sh
+++ b/contrib/build_tools_util.sh
@@ -50,6 +50,28 @@ function download_if_not_exist() {
     fi
 }
 
+# Function to clone or update a git repository to a specific commit
+clone_or_update_repo() {
+    local repo_url=$1
+    local commit_hash=$2
+    local repo_dir=$3
+
+    if [ -z "$repo_url" ] || [ -z "$commit_hash" ] || [ -z "$repo_dir" ]; then
+        fail "clone_or_update_repo: invalid arguments: repo_url='$repo_url', commit_hash='$commit_hash', repo_dir='$repo_dir'"
+    fi
+
+    if [ -d "$repo_dir" ]; then
+        info "Repository $repo_url exists in $repo_dir, updating..."
+        git -C "$repo_dir" clean -ffxd >/dev/null 2>&1 || fail "Failed to clean repository $repo_dir"
+        git -C "$repo_dir" fetch --all >/dev/null 2>&1 || fail "Failed to fetch from repository"
+        git -C "$repo_dir" reset --hard "$commit_hash^{commit}" >/dev/null 2>&1 || fail "Failed to reset to commit $commit_hash"
+    else
+        info "Cloning repository: $repo_url to $repo_dir"
+        git clone "$repo_url" "$repo_dir" >/dev/null 2>&1 || fail "Failed to clone repository $repo_url"
+        git -C "$repo_dir" checkout "$commit_hash^{commit}" >/dev/null 2>&1 || fail "Failed to checkout commit $commit_hash"
+    fi
+}
+
 # https://github.com/travis-ci/travis-build/blob/master/lib/travis/build/templates/header.sh
 function retry() {
     local result=0