Preface
The smartphone is the ultimate personal computer. Mobile devices are always with us and have become an essential part of personal productivity and lifestyle needs. We use them for messaging, social media, Google searches, games, picture taking, and, of course, phone calls.
The Android operating system powers most of the world’s smartphones, bringing an extensive app catalog to these devices. According to Google, more than 1 billion active devices are currently running Android.
Perhaps you have reached the point at which using mobile apps on your smartphone isn’t enough—it is time to create one. You might just want to tinker and program a simple app, or maybe you have thought of a new concept that doesn’t exist yet. Whatever the case, ...
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