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Rather than letting a user know they are blocked, I have found it a good idea not to tell them, as they will then try everything in their power to circumvent the block Instead I tend to resort to tactics such as blocking a user for an hour or a day and then unblocking and re-blocking them randomly And, in place of telling them about this, I will do things such as continuing to display their own posts to the screen but not to any other user, so they will assume they are simply being ignored They will never be able to work out exactly what is going on Sometimes their trolling will work; other times it won t Eventually, in most cases the user will drift away from your site and find another one to bother Sneaky Yes Effective Also yes But now you have the means to deal with unwanted users, I leave it up to you to devise your own methods of blocking or banning them By the way, when using this plug-in, make sure you have also copied PIPHP_ ManageCookie() into your program, or otherwise included it, as it is called by the code

Activity to be stopped and restarted when the screen orientation changes. You may need to return to your code and implement the Activity lifecycle methods.

The documentation for all the PICAXE BASIC commands is contained in Part II of the PICAXE Manual We ll explore many of these commands throughout the pages of this book, but you may also want to spend some time browsing the documentation in Part II of the manual to get a sense of the scope of PICAXE BASIC

function PIPHP_BlockUserByCookie($action, $handle, $expire) { if (strtolower($action) == 'block') { if ($_SESSION['handle'] != $handle) return FALSE; else return PIPHP_manageCookie('set', 'user', $handle, $expire, '/'); } return PIPHP_manageCookie('read', 'user', NULL, NULL, NULL); }

B.1.7

ne of the most interesting recent developments on the Web is the trend of providing Application Programming Interfaces (APIs) to web sites, with which you can integrate content from other sites into your own Generally such APIs accept standard POST or GET requests as might be sent from an HTML form or hyperlink, and then return data in the form of XML (Extensible Markup Language), JSON (JavaScript Object Notation), or other easy-to-process formats For example, both Google and Yahoo! provide a range of APIs for many of their web properties, such as Google Book Search and Charts or Yahoo! Search, Answers, and Stocks There are plug-ins for all of these in this chapter There are also plug-ins for handling Wikipedia entries, Flickr photo streams, and currency conversion from the European Central Bank However, although these plug-ins provide the functionality to process the information supplied by those companies, it s your responsibility to ensure you follow each service s rules and guidelines and have sufficient permission to reuse or republish data extracted from their sites

As an extra step, if your application persists data locally via a file, SharedPreferences, or a SQL database, consider providing an import/export feature. This feature can be implemented as an Activity, allowing the user to save the data out to the SD card in a readily parsable format such as CSV or XML. The import/export feature should also allow the user to restore the data to your application s local storage. This extra feature may make application upgrades easier and more resistant to errors. Having an easy export/image mechanism via SD card also makes moving to a new device a nonevent because your users can easily bring their data with them to the new device. Your users will love you for this! Once you re convinced that your application is ready for release, it s time to digitally sign the application in preparation for taking it to the Android Market.

1

The Android platform requires every application file that is, yourappname.apk to be digitally signed in order to run on a device or emulator; without a signature, an application simply won t run. When you use Eclipse to develop your application, Eclipse silently signs the application with an automatically provided debug key. The signing requirement is entirely transparent to most developers until it s time to publish an application for others to use. When you re publishing an application for distribution, the application needs to be signed with a nondebug signature. Fortunately, the applications can be self-signed, meaning a certificate authority isn t required. This keeps the complexity and cost down considerably compared to the signing process required for other mobile platforms.