Download e-book for iPad: Android Recipes: A Problem-Solution Approach for Android 5.0 by Dave Smith

By Dave Smith

ISBN-10: 1484204751

ISBN-13: 9781484204757

ISBN-10: 148420476X

ISBN-13: 9781484204764

Android Recipes, Fourth version offers greater than a hundred down-to-earth code recipes, and courses you step by step via quite a lot of necessary themes utilizing entire 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 advanced recommendations, in Android Recipes, you can find reside code examples. in case you commence a brand new undertaking you could ponder copying and pasting the code and configuration documents from this booklet after which editing them on your personal customization needs.

Crammed with insightful guideline and precious examples, this fourth variation of Android Recipes is your consultant to writing apps for one in every of today’s preferred cellular systems. It bargains pragmatic suggestion that can assist you get the activity performed speedy and good. this may prevent loads of paintings over making a undertaking from scratch!

Android is still one of many best cellular OS and improvement structures using modern cellular thoughts and the apps surroundings. Android appears to be like complicated, yet bargains quite a few geared up improvement kits to these entering 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 program info and percentage it among applications
  • Capture and play again a variety of gadget media items
  • Communicate with net services
  • Get the main from your consumer interface

Who this booklet is for

This e-book is a convenient reference for all Android app builders.

Table of Contents

1. Layouts and Views

2. person Interaction

3. Communications and Networking

4. Interacting with gadget and Media

5. Persisting Data

6. Interacting with the System

7. photographs 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

Sample text

To do this, we create qualified directories for the landscape orientation that match this device size class. Using both smallest-width and bucket-size qualifiers ensures we are compatible with older and newer tablets. The 10-inch tablet devices in the previous size scheme were considered extra-large screens, and in the new scheme they have a smallest width of around 720dp. For these devices, the screen is large enough to use the tablet layout in both orientations, so we create qualified directories that call out only the screen size.

Here we use Java’s this() notation to drill the first two constructors down to the one that really does all the work. 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.

In all cases in which the tablet layout was referenced, we had to create only one layout file to manage, thanks to the power of using aliases. Now when we run the application, you can see how Android selects the appropriate layout to match our configuration. Figure 1-3 shows default and landscape layouts on a handset device. CHAPTER 1: Layouts and Views Figure 1-3. Handset portrait and landscape layouts The same application on a 7-inch tablet device displays the default layout in portrait orientation, but we get the full tablet layout in landscape (see Figure 1-4).

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Android Recipes: A Problem-Solution Approach for Android 5.0 by Dave Smith

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