[Android] Remove debug info in release build to reduce package size

.github/workflows/examples.yaml

@@ -115,6 +115,7 @@ jobs:
             echo "CORE_SIZE_ARM64=$CORE_SIZE_ARM64" >> $GITHUB_ENV
             echo "CORE_SIZE_ARMV7=$CORE_SIZE_ARMV7" >> $GITHUB_ENV
             echo "CORE_SIZE_X64=$CORE_SIZE_X64" >> $GITHUB_ENV
+            dir ${{ github.workspace}}/packages/opencv_core/android/.cxx
 
         # Build full APK for opencv_core (universal)
         - name: opencv_core full apk size
@@ -135,6 +136,7 @@ jobs:
             echo "DART_SIZE_ARM64=$DART_SIZE_ARM64" >> $GITHUB_ENV
             echo "DART_SIZE_ARMV7=$DART_SIZE_ARMV7" >> $GITHUB_ENV
             echo "DART_SIZE_X64=$DART_SIZE_X64" >> $GITHUB_ENV
+            dir ${{ github.workspace}}/packages/opencv_core/android/.cxx
 
         # Build full APK for opencv_dart (universal)
         - name: opencv_dart full apk size
@@ -200,7 +202,11 @@ jobs:
           with:
             name: android-size-report
             path: android_size_report.json
-
+        - name: Upload apk
+          uses: actions/upload-artifact@v4
+          with:
+            name: opencv_core-arm64-v8a-release.apk
+            path: packages/opencv_core/example/build/app/outputs/flutter-apk/app-arm64-v8a-release.apk
 
   linux:
     name: linux-size-comparison

packages/opencv_core/android/build.gradle

@@ -84,5 +84,15 @@ android {
                 "-DDARTCV_WITH_GAPI=OFF"
           }
       }
+
+      buildTypes {
+        release {
+          externalNativeBuild {
+            cmake {
+              arguments "-DCMAKE_BUILD_TYPE=Release"
+            }
+          }
+        }
+      }
     }
 }

packages/opencv_dart/android/build.gradle

@@ -81,5 +81,15 @@ android {
                   "-DDARTCV_WITH_GAPI=OFF"
             }
         }
+
+        buildTypes {
+          release {
+            externalNativeBuild {
+              cmake {
+                arguments "-DCMAKE_BUILD_TYPE=Release"
+              }
+            }
+          }
+      }
     }
 }