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Kotlin for Android App Development (Paperback)Write More Robust and Maintainable Android Apps with KotlinPeter Sommerhoff takes a practical approach to teaching Kotlin providing a larger set of code listings that demonstrate language features and guiding readers through the development of two Android apps step step. . . . Peter finds a good balance between what is essential and what can be left to readers, so this book is an efficient yet comprehensible source for starting programming with
Write More Robust and Maintainable Android Apps with KotlinPeter Sommerhoff takes a practical approach to teaching Kotlin providing a larger set of code listings that demonstrate language features and guiding readers through the development of two Android apps step step. . . . Peter finds a good balance between what is essential and what can be left to readers, so this book is an efficient yet comprehensible source for starting programming with Kotlin.�Bernhard Rumpe, Professor of Software Engineering, RWTH Aachen UniversityThe Kotlin language brings state-of-the-art programming techniques and constructs to Android development. Kotlin for Android App Development will help you rapidly understand Kotlins principles and techniques, apply Kotlin in production app development, integrate Kotlin with existing Java code, and plan a migration to Kotlin, if you choose.If you have at least basic programming experience (with any language), Peter Sommerhoffs well-crafted overview and examples will help you get quickly up-to-speed with the Kotlin language, its constructs, and its advanced functional and object-oriented capabilities.Once youve mastered these foundations, Sommerhoff walks you through two complete app development projects, introducing best practices and emerging patterns for writing code thats robust, concise, readable, and highly performant. Understand Kotlins goals, principles, advantages, design, and constructs Take full advantage of functional programming in the Kotlin environment Write more concise and reusable code using Kotlins object-oriented features Interoperate with existing Java code, and plan a migration to Kotlin Use coroutines to efficiently handle concurrency Capture data via third-party APIs, map it to internal data representations, and present it to users Master best practices for architecting Kotlin Android apps Improve productivity and readability creating simple domain-specific languages in Kotlin Register your book for convenient access to downloads, updates, and/or corrections as they become available. See inside book for details.Shipping Notes
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★★★★★ 5
Monthly reload for Subscribe & Save Orders
Reload type: One Time Reload
Not a glamorous review, but a genuinely useful tip for Subscribe & Save users. I reload about $100 to my gift card balance once a month, a week or two before my S&S order processes. Amazon pulls each Subscribe & Save item as a separate transaction, which means 10+ individual charges hitting your bank account on before or on ship day. A headache for budgeting and a minor anxiety trigger if you're watching your account for unauthorized activity. Loading the balance first consolidates everything into one clean transaction. Your S&S order then pulls from the gift card balance rather than your card directly, and your bank statement stays tidy.
The side benefit is built-in budget discipline. I set about $100 as my monthly Amazon ceiling - if my cart runs over, something gets pushed to next month. It's a simple system that keeps spending intentional without any extra effort. If you're a regular S&S user who wants cleaner finances and less ""wait, who charged this and what was that charge?"" moments, this is worth making a habit.
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Great! 💳✨
Reload type: One Time Reload
I love using my Amazon balance! It’s always so quick and easy to use, it’s convenient and posts quickly without issues, I’ve always had good experiences with reloading my balance.
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Reviewed in the United States on June 8, 2026
★★★★★ 5
great product
Reload type: One Time Reload
so easy, thanks amazon
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Reviewed in the United States on June 9, 2026
★★★★★ 4
Great for keeping bank statements clean but random security delays are frustrating
Reload type: One Time Reload
I use the balance reload tool to manage my monthly budget and easily hit credit card sign-up bonuses. It keeps my bank statements totally clean by grouping dozens of tiny e-book and movie rental charges into one single transaction. Most of the time the whole process works flawlessly and the money shows up in my account within five minutes. It is honestly the easiest way to put a hard limit on my family's everyday online shopping.
You just need to watch out for a few annoying system quirks when you load larger amounts of money. Even though it usually works instantly the automated security filter sometimes flags big reloads and freezes the transaction for hours. This random delay is incredibly frustrating if you are trying to add cash fast to catch a lightning deal before it expires. You also have to remember that this balance is strictly non-refundable and cannot be used to buy other gift cards.
Overall this is still a great method for organizing online spending and maximizing your cash-back credit card rewards. It totally fixed how I track household purchases but you definitely have to tolerate the occasional processing delays. My best advice is to load your account a day or two before you actually need to buy a big-ticket item. It works perfectly as a budgeting tool as long as you know the rules and plan for the random security hold.
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Fast
Reload type: One Time Reload
Super fast easy to use and reload
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Reviewed in the United States on June 11, 2026