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<b>, </b>, and <wbr> tags (the only ones Yahoo! Search seems to employ) are changed into their HTML entity equivalents At this point, the XML data should be in a format acceptable to SimpleXML, so the contents of $xml are then processed into a SimpleXML object and placed in the object $sxml, and the array that will be used to store all the result details, $data, is also initialized Now, to retrieve all the results, a foreach loop is used to iterate through $sxml>resultset_web->result, placing each element into the object $result From here the title, abstract, display URL, and click-through URL are retrieved into the variables $t, $a, $d, and $c If $a, the abstract, has a value, then these four variables are grouped into an array and inserted into the next available element of $data This check is made because sometimes Yahoo! Search results don t have an abstract, and I choose to ignore such results Once $data has been populated, a two-element array is returned, with the first element being the number of results returned, and the second an array, each element of which is a sub-array containing the parts of each result

LISTING 9-1

The properties of a ContentProvider can configure several important settings beyond the basics, such as specific permissions, initialization order, multiprocess capability, and more. Though most ContentProvider implementations won t need to delve into these details, you should still keep them in mind. For complete and upto-date ContentProvider properties, see the SDK documentation.

If at any point the word at position $p in the $dictionary array is the same as $word, then a match has been found and the value TRUE is returned Otherwise, the process continues and eventually $top and $bot will pass each other and $bot will have a value higher than $top, because all the words in the dictionary have been checked, at which point the loop exits and the value FALSE is returned because no match was made

Summary

(continued)

From a simple SharedPreferences mechanism to file storage, databases, and finally the concept of a ContentProvider, Android provides myriad ways for applications to retrieve and store data. As we discussed in this chapter, several storage types can share data across application and process boundaries, and several can t. You can create SharedPreferences with a permissions mode, allowing the flexibility to keep things private, or to share data globally with read-only or read-write permissions. The filesystem provides more flexible and powerful data storage for a single application. Android also provides a relational database system based on SQLite. Use this lightweight, speedy, and capable system for local data persistence within a single application. To share data, you can still use a database, but you need to expose an interface through a ContentProvider. Providers expose data types and operations through a URI-based approach. In this chapter, we examined each of the data paths available to an Android application. You built several small, focused sample applications to use preferences and the filesystem, and you expanded the WeatherReporter sample application that you began in the last chapter. This Android application uses a SQLite database to access and persist data. You also built your own custom content provider from the ground up. To expand your Android horizons beyond data, we ll move on to general networking in the next chapter. We ll cover networking basics and the networking APIs Android provides. We ll also expand on the data concepts we ve covered in this chapter to use the network itself as a data source.

To use the main function and have any misspelled words highlighted with underlines, you call it like this: