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Android Programming Pushing the Limits by Erik Hellman

By Erik Hellman

Should you already recognize your approach round the Android OS and will construct an easy Android app in lower than an hour, this booklet is for you. If you’re itching to work out simply how a ways you could push it and observe what Android is basically in a position to, it’s for you. And if you’re able to easy methods to construct complex, intuitive, cutting edge apps which are a blast to take advantage of, this e-book is well for you. From customized perspectives and complex multi-touch gestures, to integrating on-line net companies and exploiting the newest geofencing and task popularity gains, ace Android developer, Erik Hellman, promises professional information, tips and little-known strategies for pushing the Android envelope so that you can: Optimize your parts for the smoothest person adventure attainable Create your individual customized perspectives Push the limits of the Android SDK grasp Android Studio and Gradle Make optimum use of the Android audio, video and photographs APIs software in Text-To-Speech and Speech acceptance utilize the recent Android maps and site API Use Android connectivity applied sciences to speak with distant units practice historical past processing Use Android cryptography APIs locate and accurately use hidden Android APIs Cloud-enable your functions with Google Play prone Distribute and promote your purposes on Google Play shop the best way to unharness the facility of Android and rework your apps from solid to nice in Android Programming: Pushing the boundaries.

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However, some recommendations have changed since Android was first released. Some modern Java constructs once avoided on Android are now recommended, mostly because of the modern JIT compiler for Android that removes many of the performance bottlenecks these constructs used to cause. This section deals with the aspects of Java code that you need to understand when writing Android applications. While the details of the Java programming language are outside the scope of this book; instead, I focus on what is important for Android development.

Normal behavior for Android is to keep Activities alive for as long as possible so that they can be launched faster. The system will completely remove (that is, destroy) Activities only when the device runs low on memory. By checking this option, you can simulate how your app will behave on a device with much less available memory. You can further simulate this kind of behavior by changing the Background Process Limit option, which forces background operations to stop much earlier. Finally, checking Show All ANRs is recommended for all developers, because it will become much more obvious when an application crashes in the background.

You can control use of the pm command in a similar way to how you work with the Application Manager. The Package Manager lets you interact with the installed applications (packages), allowing you to list, install, uninstall, and inspect the features and permissions on the device. Although the pm command isn’t as useful during development as the am command, it can sometimes be helpful if you want to find out details about the device that are otherwise a bit complicated to discover. For instance, if you want to list all the installed packages (that is, installed apps), you can type the following: $ adb shell pm list packages In addition to the adb commands just covered, there are many others you need to be familiar with.

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