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Lack of an open audio library: I consider this to be a serious limitation. Audio is critical in gaming, and most vendors nowadays try to use open APIs such Open Audio Library (AL) or the standard Linux sound devices. Up to version 2.0, Android uses the SoniVox Enhanced Audio System (EAS). Lack of streaming audio: This is another serious issue. I found the lack of streaming audio to be the most frustrating thing about Android. I don t mind learning the EAS audio API, but the darn thing doesn t even support audio streaming Audio streaming is critical and used extensively by Wolfenstein 3D and Doom in s 6 and 7. To overcome this shortcoming, I was forced to cascade audio events to the Java layers, put the soundtracks in external files, and have the MediaPlayer handle them. In Android, you are boxed in by the MediaPlayer. Although I have heard that Google is planning support for OpenAL (audio library); this would be a good move. Lack of support for native development: I am happy to see that Google has realized how critical native development support will be if Android is to become a competitor in the mobile gaming arena. With the release of the Android NDK 1.6, things have improved greatly, but Android still lags behind the iPhone OS in this field. Only basic OpenGL ES implementation: As of version 1.5 of the SDK, Android implemented OpenGL ES 1.x. The iPhone OS has been supported OpenGL ES 2.0 for a long time now. Although I am happy to report that, with firmware 2.0, Android implements OpenGL ES 2.0, development in this area still lags behind the iPhone.

At some point, you may want to clear the search so the Report Page does not display any data. You can do this using the ClearSearch method, which sets the LastSql variable equal to an empty string. The page does not attempt to execute a query when the LastSql variable does not contain text, so this effectively clears the search. This is a protected method so you can access it from the Report Page if you need to use it.

Inside the BindReport method, you ll find all the logic for connecting to a database, querying data, outputting the data to the Report Page, and setting up the paging navigation controls The BindReport method is called from a number of different locations The ReportFramework class calls the BindReport method in the Pre_Load event so the appropriate GridView events fire Whenever the user executes a new search or navigates to another page, then the ReportFramework class must set up the new query and call BindReport to ensure that the Report Page displays the appropriate information BindReport starts out by determining whether or not the LastSql property is an empty string If so, then the method exits; otherwise, the method continues on and declares a number of method variables.

Three of the variables, dbConn, dbCmd, and dbDr, store references to database objects used to connect to the database, execute a command, and retrieve the results, respectively RecordStart and RecordEnd store the beginning and ending record numbers of the items displayed during a paged query A Try Catch block surrounds most of the code in the BindReport method Following suit with other Try Catch blocks in the ReportFramework class, it catches any exception that occurs and sends it to the OnReportError method Inside the Try Catch block, the method creates a new SqlConnection object The connection string for the SqlConnection object comes from the <connectionString> section of Webconfig and is acquired by passing the value from the ConnectionStringKey method implemented in the derived class into the ConnectionStrings property The resulting ConnectionStringSettings object contains the appropriate connection string in its ConnectionString property.

able A-1 presents all the configurable components in log4j and the configurable parameters associated with each component. Table A-1. Log4j Framework Configuration

On the other hand, Android has some great features that make it a serious contender as a mobile development platform: Open source: An army of developers is out there ready to build code for this open platform, and new devices are popping out all the time. Built on Linux: I love Linux, and I am always ready to support development in this beautiful OS. It is a masterpiece of software engineering. Multitasking: multitasking as an advantage is in the eye of the beholder (I am not sure where to put this one). In one hand, there are some who say that multitasking is great for social networking applications, because you can have multiple background processes feeding you information, but detractors claim that it hogs the CPU resources and diminishes battery life. I have to go with the detractors on this one.

After creating the database connection, the method then creates a new SqlCommand object, passing in LastSql as the query and dbConn as the database connection After the SqlCommand object is created, BindReport opens the database connection, executes the SqlCommand using the ExecuteReader method, and stores the resulting SqlDataReader in the dbDr variable The method then assigns dbDr to the DataSource property of the ReportGrid, and calls DataBind to bind the ReportGrid to its data source All the data from the SqlDataReader then populates the ReportGrid according to its display templates defined on the Report Page After the ReportGrid has been data bound, the BindReport uses an IF statement and a series of AndAlso conditionals to check whether or not it should set up the paging navigation controls This IF statement uses AndAlso because one condition must be met before the next condition can be safely checked.