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Android is an open-source operating system developed by Google. It is used on a variety of mobile devices, including smartphones, tablets, smartwatches, and television sets. Android is based on the Linux kernel, and is designed primarily for touchscreen input, including swiping and tapping. It is the most popular mobile operating system in the world, with more than 2 billion active users. Android is regularly updated with new features and security patches, and the latest version is Android 11. Android apps are distributed through the Google Play Store, and many manufacturers also offer their own app stores, such as Samsung Galaxy Store and Huawei AppGallery. There are also third-party app stores available, such as the Amazon Appstore and the F-Droid repository.
Introduction In 2025, user data security isn’t just a nice-to-have — it’s a legal, ethical, and product-level mandate. Yet, many Android developers still fall into the trap of storing sensitive data…
SOLID principles, you might think you’ve never used them, or maybe you’re not even sure what they are. But here’s the truth: if you’ve been in Android development for over a year and care about…