Android SDK vs Erlang: What are the differences?

1. Development Focus: Android SDK is primarily designed for developing mobile applications for the Android operating system, focusing on user interfaces, layouts, and interactions, while Erlang is a programming language and runtime system built for creating highly scalable, fault-tolerant, and distributed systems, often used in telecommunications and networking applications.

2. Concurrency Model: Android SDK follows a traditional single-threaded model, where UI and background tasks must be carefully managed to prevent blocking the main thread, while Erlang uses lightweight processes and message passing to enable massive concurrency with low overhead, allowing for easier development of concurrent and distributed systems.

3. Platform Compatibility: Android SDK is specifically targeted for developing applications on devices running the Android operating system, whereas Erlang is platform-independent, allowing developers to deploy Erlang code on various platforms without extensive modifications.

4. Type System: Android SDK uses Java as its primary language, which is statically typed with object-oriented programming features, while Erlang is dynamically typed and functional programming language, providing pattern matching and higher-order functions as core constructs.

5. Fault Tolerance: Android SDK relies on developers to implement error handling and recovery mechanisms in their code, whereas Erlang has built-in features for fault tolerance, allowing systems to recover from errors and failures automatically without manual intervention.

6. Community and Support: Android SDK has strong community support with extensive documentation, tutorials, and forums, backed by Google, while Erlang has a dedicated community with a focus on providing resources for building robust distributed systems, with companies like Ericsson contributing to its development.

In Summary, Android SDK and Erlang differ in their development focus, concurrency model, platform compatibility, type system, fault tolerance mechanisms, and community support.