Gophers are coming
summary
Demonstrates using go mobile bind/build to produce Android APKs and AARs, shows native Go apps and Java-callable libraries, and lists concrete limits and fixes: 1000 concurrent goroutines dispatching 3000 tasks completes in 43 milliseconds, builds per-arch native binaries (arm/arm64/x86/x86_64), and uses JNI via C as the bridge. Covers practical gotchas: fat binaries and APK splitting, limited exported types (no arrays), int size mapping, expensive frequent cross-process calls, and a JSON/byte-slice workaround for complex data.
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