By Dave Smith
Android Recipes, Fourth variation offers greater than a hundred down-to-earth code recipes, and publications you step by step via quite a lot of precious themes utilizing whole and real-world operating code examples. This ebook is up-to-date to incorporate the Android 5.0 SDK, in addition to previous releases.
Instead of summary descriptions of complicated ideas, in Android Recipes, you can find dwell code examples. if you happen to commence a brand new undertaking you could think of copying and pasting the code and configuration documents from this ebook after which editing them on your personal customization needs.
Crammed with insightful guide and necessary examples, this fourth variation of Android Recipes is your advisor to writing apps for one among today’s most popular cellular systems. It deals pragmatic suggestion that can assist you get the activity performed speedy and good. this may prevent loads of paintings over making a venture from scratch!
Android remains to be one of many top cellular OS and improvement systems riding trendy cellular ideas and the apps surroundings. Android appears to be like advanced, yet bargains numerous geared up improvement kits to these getting into Android with differing programming language ability sets.
What youll 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 facts among units and different exterior hardware
- Persist program information and proportion it among applications
- Capture and play again quite a few machine media items
- Communicate with internet services
- Get the main from your consumer interface
Who this booklet is for
This ebook 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 equipment and Media
5. Persisting Data
6. Interacting with the System
7. photos and Drawing
8. operating with Android NDK and Renderscript
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Additional info for Android Recipes: A Problem-Solution Approach for Android 5.0
CHAPTER 1: Layouts and Views Listing 1-18. onTouchEvent(event); } } Property animations provide transformations that were not previously available with the older animation system, such as rotations about the x and y axes that create the effect of a three-dimensional transformation. In this example, we don’t have to fake the rotation by doing a calculated scale; we can just tell the view to rotate about the y axis. Because of this, we no longer need two animations to flip the coin; we can just animate the rotationY property of the view for one full rotation.
This final transition will cause the remaining items below any removed button to slide up and shrink slightly as they move into place. 1-6. Implementing Situation-Specific Layouts Problem Your application must be universal, running on different screen sizes and orientations. You need to provide different layout resources for each of these instances. Solution (API Level 4) Build multiple layout files, and use resource qualifiers to let Android pick what’s appropriate. We will look at using resources to create layouts specific to different screen orientations and sizes.
The AdapterView changes only the visibility parameters on the two objects; it does not insert or remove them in the layout tree. How It Works Here is how this would look with a simple TextView used as the empty view. First, a layout includes both views, shown in Listing 1-32. Listing 1-32. com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">
Android Recipes: A Problem-Solution Approach for Android 5.0 by Dave Smith