Update android/build.gradle

android/build.gradle

@@ -28,3 +28,20 @@ subprojects {
 tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }
+subprojects {
+    afterEvaluate { project ->
+        if (project.hasProperty('android')) {
+            def androidExt = project.extensions.findByName('android')
+            if (androidExt != null && androidExt.hasProperty('namespace') && (androidExt.namespace == null || androidExt.namespace == '')) {
+                def manifestFile = project.file('src/main/AndroidManifest.xml')
+                if (manifestFile.exists()) {
+                    def manifestText = manifestFile.text
+                    def matcher = manifestText =~ /package="([^"]+)"/
+                    if (matcher.find()) {
+                        androidExt.namespace = matcher.group(1)
+                    }
+                }
+            }
+        }
+    }
+}