By Mr. Mark L Murphy
The Busy Coder's consultant to complex Android improvement selections up the place its predecessor left off, protecting but extra themes of curiosity to the pro Android software developer. if you want to take advantage of sensors, create domestic reveal widgets, play again media, take images with the digital camera, or enforce subtle companies, this ebook might be a invaluable consultant. With all pattern resource code on hand for obtain from the CommonsWare site -- as are the samples from all of CommonsWare's Android books -- you could test the booklet examples your self and proceed your schooling additional. CommonsWare even has a aid Google workforce for readers, to assist solution questions about the e-book fabrics and examples
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Additional resources for The Busy Coder's Guide to Advanced Android Development
Synthesizes the overall list of objects from each of the adapters, plus the section headings. So, for example, the implementation of getView() walks each section and returns either a View for the section header (if the requested item is the first one for that section) or the View from the section's adapter (if the requested item is any other one in this section). The same holds true for getCount() and getItem(). SectionedAdapter One thing that SectionedAdapter needs to do, though, is ensure that the pool of section header View objects is recycled separately from each section's own pool of View objects.
A ListView using a SectionedAdapter, showing one header and part of a list Here, the headers are simple bits of text with an appropriate style applied. Your section headers, of course, can be as complex as you like. From Head To Toe Perhaps you do not need section headers scattered throughout your list. If you only need extra "fake rows" at the beginning or end of your list, you can use header and footer views. supports addHeaderView() and addFooterView() methods that allow you to add View objects to the beginning and end of the list, respectively.
There is no easy way to do this from a simple query. Instead, you need to be a bit more creative, and wrap your SimpleCursorAdapter in something that can intelligently inject the section headings. Composition for Sections Jeff Sharkey, author of CompareEverywhere and all-around Android guru, demonstrated a way of using composition to create a ListView with section headings. The code presented here is based on his implementation, with a few alterations. 0 that most of the book's code uses as a license.