By Dave Smith
Step via a variety of helpful themes utilizing entire and real-world operating code examples; includes greater than a hundred down-to-earth code recipes. This booklet is up to date to incorporate the Android 5.0 SDK, in addition to previous releases. rather than summary descriptions of complicated techniques, 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 documents from this e-book after which enhancing them in your personal customization needs.
Crammed with insightful guideline and important examples, this fourth version of Android Recipes is your advisor to writing apps for certainly one of today’s most popular cellular systems. It bargains pragmatic suggestion to help you get the task performed quick and good. this may prevent loads of paintings over making a undertaking from scratch!
Android remains to be one of many major cellular OS and improvement structures riding latest cellular options and the apps environment. Android seems to be complicated, yet bargains quite a few equipped improvement kits to these getting into Android with differing programming language ability sets.
What you’ll learn
- Code for Android smartphones and tablets
- Use exterior libraries to save lots of 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 net services
- Get the main from your consumer interface
Who this publication is for
This e-book is a convenient reference for all Android app builders.
Table of Contents
1. Layouts and Views
2. consumer Interaction
3. Communications and Networking
4. Interacting with machine and Media
5. Persisting Data
6. Interacting with the System
7. images and Drawing
8. operating with Android NDK and Renderscript
Read Online or Download Android Recipes A Problem-Solution Approach for Android 5.0 PDF
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Additional resources for Android Recipes A Problem-Solution Approach for Android 5.0
Sample text
Customizing ListView Rows Problem Your application needs to use a more customized look for each row in a ListView. Solution (API Level 1) Create a custom XML layout and pass it to one of the common adapters, or extend your own. You can then apply custom state drawables for overriding the background and selected states of each row. How It Works Starting Simple If your needs are simple, create a layout that can connect to an existing ListAdapter for population; we’ll use ArrayAdapter as an example.
OfFloat() did for us implicitly. We also still need our AnimatorUpdateListener to determine when to switch from heads to tails, but that cannot be applied to a set object. Instead, we have to find the rotation animation inside the set using getChildAnimations() in order to attach the listener in the appropriate place. Running this new example will give us a slightly more realistic coin-flip animation. 1-5. Animating Layout Changes Problem Your application dynamically adds or removes views from a layout, and you would like those changes to be animated.
Building the custom control in this fashion ensures that we can still define this view in XML layouts. Without implementing the attributed constructors, this would not be possible. buttonStyle to the constructor. This defines the style value that should be pulled from the current theme and applied to the view. This sets up the background to match other button instances, but it also makes the view clickable and focusable, as those flags are also part of the system’s style. Whenever possible, you should load your custom widget’s look and feel from the current theme to allow easy customization and consistency with the rest of your application.