Android Fragments - download pdf or read online

By Satya Komatineni, Dave MacLean

ISBN-10: 1484208544

ISBN-13: 9781484208540

Android Fragments is a 100-page speedy begin speeded up consultant to studying and quick utilizing Android fragments. You'll find out how to code for fragments; care for config adjustments; code for normal vs. fragmented dialogs; paintings with personal tastes and saving kingdom; paintings with the compatibility library; and deal with complex async initiatives and growth dialogs.

After analyzing and utilizing this booklet, that is in response to fabric from the best-selling professional Android, you'll be an Android UI savant. at least, your apps' person interfaces and occasion dealing with may be extra aggressive and higher acting, specifically for tablet-optimized UIs and occasions.

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Extra info for Android Fragments

Sample text

If a device gets connected to a dock, that’s also a configuration change. So is changing the language of the device. Whatever the new configuration is, as long as you’ve designed your activity for that configuration, Android takes care of most everything to transition to it, giving the user a seamless experience. This chapter will take you through the process of a configuration change, from the perspectives of both activities and fragments. We’ll show you how to design your application for those transitions and how to avoid traps that could cause your application to crash or misbehave.

Once you have a derived dialog from this class such as public class MyDialogFragment extends DialogFragment { ... } you can then show this dialog fragment MyDialogFragment as a dialog using a fragment transaction. Listing 3-1 shows a code snippet to do this. Listing 3-1. other activity functions } Note We provide a link to a downloadable project at the end of this chapter in the “References” section. You can use this download to experiment with the code and the concepts presented in this chapter.

The developers doing the extending might find it easier to just override onRestoreInstanceState() with the code to restore state, as compared to having to override all of onCreate(). What’s very important to note here is that you need to be very concerned with references to activities and views and other objects that need to be garbage-collected when the current activity is fully destroyed. If you put something into the saved bundle that refers back to the activity being destroyed, that activity can’t be garbage collected.

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Android Fragments by Satya Komatineni, Dave MacLean

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