By Erik Hellman
Unharness the facility of the Android OS and construct the categories of magnificent, leading edge apps clients like to use
If you recognize your means round the Android OS and will construct an easy Android app in less than an hour, this booklet is for you. If you’re itching to determine simply how a ways you could push it and realize what Android is admittedly able to, it’s for you. And if you’re able to how to construct complicated, intuitive, leading edge apps which are a blast to take advantage of, this e-book is well for you.
From customized perspectives and complicated multi-touch gestures, to integrating on-line internet providers and exploiting the newest geofencing and task attractiveness positive aspects, ace Android developer, Erik Hellman, grants professional counsel, methods and little-known concepts for pushing the Android envelope so that you can:
Optimize your parts for the smoothest person event possible
Create your individual customized Views
Push the limits of the Android SDK
Master Android Studio and Gradle
Make optimum use of the Android audio, video and pics APIs
Program in Text-To-Speech and Speech Recognition
Make the main of the recent Android maps and placement API
Use Android connectivity applied sciences to speak with distant devices
Perform historical past processing
Use Android cryptography APIs
Find and appropriately use hidden Android APIs
Cloud-enable your purposes with Google Play Services
Distribute and promote your purposes on Google Play Store
Learn how you can unharness the ability of Android and remodel your apps from solid to nice in Android Programming: Pushing the boundaries.
Read Online or Download Android Programming: Pushing the Limits PDF
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Additional resources for Android Programming: Pushing the Limits
If your project has a different structure, simply change the paths from the previous example. ) Optimize and Obfuscate with ProGuard An Android application is the compiled result from your Java, XML, and other resource files. The Java code is compiled into a binary format called dex, which is what the Dalvik virtual machine on Android reads when executing your code. This format is not designed to be human-readable, tools are available for decompiling a dex file back to a human-readable format. In some cases, decompiling the code can be a security issue—for instance, when your code contains keys or other values that should not be easily accessible (such as integration with Licensing Server).
The procedure is basically the same one you follow when you run an application from your IDE. Figure 1-3 shows one of the sample applications from the Android SDK opened in Android Studio. As you can see, I set a break point in the code and started the debugging from my IDE. The figure shows how the IDE looks once the execution hits the breakpoint. Figure 1-3 Breakpoint reached when debugging sample application in Android Studio When a breakpoint is reached, you can inspect the state of the application at that specific point.
Fortunately, your IDE has a built-in function called Refactoring that makes this task simple and eliminates the risk of introducing any bugs. Many refactoring tasks are available in your IDEs. Refactoring involves simple things like renaming and moving variables, methods, classes, and packages, as well as more complex operations such as changing the signature of methods, encapsulating fields, replacing code duplicates, and replacing inheritance with delegation. I cover some of the most common tasks in the following sections.