By Dave Smith, Erik Hellman
Discover greater than a hundred down-to-earth code recipes, protecting quite a lot of important themes utilizing entire and real-world operating code examples. This ebook is up to date to incorporate the Android N SDK (7.0), in addition to previous releases.
Crammed with insightful guideline and worthy examples, this 5th variation of Android Recipes is your consultant to writing apps for considered one of today’s preferred cellular structures. It bargains pragmatic suggestion that can assist you get the task performed quick and good. this may prevent loads of paintings over making a undertaking from scratch.
Instead of summary descriptions of advanced ideas, in Android Recipes you will find dwell code examples. in case you commence a brand new venture you could give some thought to copying and pasting the code and configuration records from this e-book after which enhancing them to your personal customization wishes.
What you will Learn
- Code for Android smartphones and tablets
- Use exterior libraries to avoid wasting time and effort
- Boost app functionality through the use of the Android NDK and RenderScript
- Design apps for functionality, responsiveness, and seamlessness
- Send info among units and different exterior hardware
- Persist software information and percentage it among applications
- Capture and play again a number of gadget media items
- Communicate with internet services
- Get the main from your person interface
Who This ebook Is For
All Android app developers.
Read Online or Download Android Recipes: A Problem-Solution Approach PDF
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Additional info for Android Recipes: A Problem-Solution Approach
Because there is no guarantee that we will get called for 23 Chapter 1 ■ Layouts and Views every degree, we just change the image as soon as we have crossed the threshold. We also set a Boolean flag to avoid setting the image to the same value on each iteration afterward, which would slow performance unnecessarily. ObjectAnimator also supports a more traditional AnimationListener for major animation events such as start, end, and repeat, if chaining multiple animations together is still necessary for the application.
Measurement The first requirement that a custom view must fulfill is to provide a measurement for its content to the framework. Before a view hierarchy is displayed, Android calls onMeasure() for each element (both layouts and view nodes), and passes it two constraints the view should use to govern how it reports the size that it should be. Each constraint is a packed integer known as a MeasureSpec, which includes a mode flag and a size value. The mode will be one of the following values: • AT_MOST: This mode is typically used when the layout parameters of the view are match_parent, or there is some other upper limit on the size.