Android build error coming from react-native-vision-camera

[pot2mayo]

Hi

I was trying to build the example code from this repo and got the following error which seems to come from the react-native-vision-camera module

> Task :react-native-vision-camera:externalNativeBuildDebug
Build VisionCamera_armeabi-v7a
ninja: Entering directory `Z:\Projects\vision-camera-image-labeler\example\node_modules\react-native-vision-camera\android\.cxx\cmake\debug\armeabi-v7a'
In file included from ../../../../src/main/cpp/java-bindings/JHashMap.cpp:5:
../../../../src/main/cpp/java-bindings/JHashMap.h:16:8: error: redefinition of 'JHashMap'
../../../../build/fbjni-0.3.0-headers.jar\fbjni/detail/Iterator.h:170:8: note: previous definition is here
../../../../src/main/cpp/java-bindings/JHashMap.cpp:15:43: error: redefinition of 'create'
../../../../build/fbjni-0.3.0-headers.jar\fbjni/detail/Iterator-inl.h:230:42: note: previous definition is here
In file included from ../../../../src/main/cpp/JSIJNIConversion.cpp:25:
../../../../src/main/cpp/java-bindings/JHashMap.h:16:8: error: redefinition of 'JHashMap'
../../../../build/fbjni-0.3.0-headers.jar\fbjni/detail/Iterator.h:170:8: note: previous definition is here

> Task :react-native-vision-camera:externalNativeBuildDebug FAILED
61 actionable tasks: 10 executed, 51 up-to-date

FAILURE: Build failed with an exception.

and futher in the error stack

  ../../../../src/main/cpp/java-bindings/JHashMap.h:16:8: error: redefinition of 'JHashMap'
  struct JHashMap : JavaClass<JHashMap<K, V>, JMap<K, V>> {
         ^
  ../../../../build/fbjni-0.3.0-headers.jar\fbjni/detail/Iterator.h:170:8: note: previous definition is here
  struct JHashMap : JavaClass<JHashMap<K, V>, JMap<K, V>> {
         ^
  1 error generated.
  [8/10] Building CXX object CMakeFiles/VisionCamera.dir/src/main/cpp/VisionCamera.cpp.o
  [9/10] Building CXX object CMakeFiles/VisionCamera.dir/src/main/cpp/FrameProcessorRuntimeManager.cpp.o
  ninja: build stopped: subcommand failed.

Any known compatibility issue between this example app and the source module?

Thanks!

[mrousavy]

Hey! I believe I fixed this, are you sure you have the latest version of VisionCamera?

[pot2mayo]

I could actually solve my issue by updating to the latest react-native-vision-camera package version 2.12.0.

I also needed to fix a few more build settings on android.

--- a/example/android/app/src/main/AndroidManifest.xml
+++ b/example/android/app/src/main/AndroidManifest.xml
@@ -14,6 +14,7 @@
       android:theme="@style/AppTheme">
       <activity
         android:name=".MainActivity"
+        android:exported="true"
         android:label="@string/app_name"
         android:configChanges="keyboard|keyboardHidden|orientation|screenSize|uiMode"
         android:launchMode="singleTask"
diff --git a/example/android/build.gradle b/example/android/build.gradle
index 6165d24..6b6636d 100644
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@@ -3,8 +3,8 @@
 buildscript {
     ext {
         minSdkVersion = 21
-        compileSdkVersion = 30
-        targetSdkVersion = 30
+        compileSdkVersion = 31
+        targetSdkVersion = 31
         ndkVersion = "20.1.5948944"
     }
     repositories {
diff --git a/example/package.json b/example/package.json
index 850c7a3..f0d2a16 100644
--- a/example/package.json
+++ b/example/package.json
@@ -12,7 +12,7 @@
     "react": "17.0.1",
     "react-native": "^0.64.2",
     "react-native-reanimated": "^2.3.0-alpha.2",
-    "react-native-vision-camera": "^2.6.1"
+    "react-native-vision-camera": "^2.12.0"
   },
   "devDependencies": {
     "@babel/core": "^7.15.0",

Thanks!