Android and Search Service
Contents
1. colHistorialID INTEGER PRIMARY KEY colHistorialName TEXT NOT NULL colHistorialExtension TEXT NOT NULL colHistorialNumberResults TEXT NOT NULL colHistorialNumberSearchs TEXT NOT NULL colHistorialProviderRapidshare TEXT NOT NULL colHistorialProviderMegaupload TEXT NOT NULL colHistorialProviderFileserve TEXT NOT NULL colHistorialProviderFilesonic TEXT NOT NULL colHistorialProviderMegashares TEXT NOT NULL colHistorialProviderHotfile TEXT NOT NULL b Accounts Table This table is used to store all the information about one account db execSQL CR E EATE TABLE IF NOT EXISTS T accountsTable colAccountID INTEG colAccountService colAccountUsername colAccountPassword T TEXT NOT NULL TEXT NOT NULL TEXT NOT NULL qa RR PRIMARY KEY AUTOINCR T MENT c Downloads Table This table is used to store the downloads all his parameters and also is relationated with the Accounts Table with a Foreign Key EATE E TABI db execSQL CR wom wom E IF NOT colDownloadID colDownloadDateTime EXISTO INT downloadsTable EG E EXT NOT NULL TEXT NOT NULL colD2. IEEE 802 11 b g After this 2 weeks testing the application on real devices the experience was so good we solve all the bugs we get and also we experimented great feeling about the application It works fast unless you do a lot of searchs but it depends on the Internet connection In conclusion the application is working correctly and usually in fast times 69 7 PROBLEMS SOLUTIONS We found different problems developing the application due to different reasons a First of all we had great difficulty adapting parsers http requests made in the search files This was because to get the xml pages the size of one s exceeded the limit of buffers in memory which are stored having to adapt the design using a buffer to concatenate the characters every 2048 bytes b In addition the search was a big challenge at first as the requests that were made were enough to websites with the consequent delay which was sometimes too long In a first version of the searches took about twice what it takes now This is because the use was made of the class AsyncTask enables AsyncTask proper and easy use of the Ul thread This class allows to perform background operations and publish results on the UI thread without having to manipulate threads and or handlers An asynchronous task is defined by a computation that runs on a background thread and whose result is published on the UI thread An asynchronous task is defined by 3 generic types
3. Operating System that allows the user different options in the scope of the direct downloads In particular we are are going to focus on one of the leading providers of direct downloads available on the Internet Rapidshare The need for this application comes from the small number of such software on Android and the increasing evolution of this Operating System encouraged to do it Especially in the field of search because search engines currently available are through web pages using the browser In addition to the above Android Operating System was chosen for his use in many devices both tablets and mobile And the lack of materials during the race to focus on this sector which is constantly growing 1 2 PROBLEM The problem that we thought to do the project AndDoSS is that currently there are not enought software with this purpose on Android and the increasing evolution of this operating system encouraged it Also the direct downloads are very useful in the current society this is because people uses it enought times That s why we thought this application is interesting to develop The solution we propose to the lack of software is the creation of the application AndDoSS which we use http queries to search for files and the api released by rapidshare to download files from internet 1 3 GOALS The two main goals that we set at the creation of this project were 1 Create a file browser in Internet providers
4. Current space This Screen is used to display the different information that the application has about the account selected This is displayed in different TextViews we cannot modify the account from here The information displayed is the Service Username Email Rapidpro expire time and the free space of the account 43 Download List A 10 33 pm AndDos Download List socesnssalpinast small jpg caro The download list is also a very similar layout of Account List but the information displayed this time is the state of the download the name of the file and the name of the account that started the download Also with TextViews If we want to start a new Download we have to click on the Menu button of our device and select the option New Download and the next layout is displayed Besides if we click one of the downloads of the List we get the Download Detail layout to the top of the application 44 New Download Screen AS 10 31 em AndDos New Download d files 415818244 3alpinas1_small jp Account Carlos rapidshare com Y New Start Date 6 7 2011 Start Time 00 00 Download now Download The New Download screen uses all the important components of the Android layouts An EditText to display the URL to download a Spinner to select the Account also we have the possibilitie from here to create a new account and the starting time of the download or selec
5. Void ArrayList lt SearchResult gt gt Override protected ArrayList lt SearchResult gt doInBackground String params String phrase params 0 return searchMaker makeSearch phrase Override protected void onPostExecute final ArrayList lt SearchResult gt result runOnUiThread new Runnable public void run Nresult Integer toString result size if result isEmpty Toast makeText SearchActivity this R string textSearchNoResults Toast LENGTH SHORT show searchAdapter new SearchResultAdapter SearchActivity this R layout search_row result listSearchResults setAdapter searchAdapter saveHistorial listSearchResults setBackgroundColor Color BLUE J lt if progressDialog null progressDialog dismiss progressDialog null Ja Every time we do a search we store it on the database of the Historial The Historial allows only to store the last 20 searchs so we need to count the number of searchs stored and also get the older search inside the database because maybe is going to be replaced public void UpdateDbVar Update values of id and number of elements of the historial mDbHelper open Globals numberHistorialElements mDbHelper getNumberHistorialElements Globals HistorialIdMin mDbHelper getOlderHistorialElement Globals HistorialIdMax mDbHelper getNewerHistorialElement mDbHelper close
6. intuitive and easy to use and which in turn is powerful enough for use in the field of mobile devices 2 Attach to this search engine the ability to download files via RAPIDSHARE file provider on the Internet To accomplish these objectives was necessary first part of finding information on the web which we have taken everything we have seen fit for the project The reason why the vendor selected to download files to the mobile device has been RAPIDSHARE is because his API is the only one we found available and you can select files from your system to download the Android device using the application 2 WORK STATION The development of the application is going to be under Android Operating System which is created by Google At first im going to explain a little introduction about Android and after that i will explain about the different kinds of utilities and plugins i used to develop for this Operating System 2 1 WHAT IS ANDROID Android is an open source software stack for mobile devices that includes an operating system middleware and key applications Google Inc purchased the initial developer of the software Android Inc in 2005 Android s mobile operating system is based upon a modified version of the Linux kernel Google and other members of the Open Handset Alliance collaborated on Android s development and release The Android Open Source Project AOSP is tasked with the maintenance and further development
7. 28 4 4 COMPARING BOTH DIAGRAMS As we can see there are important changes in the time about the different steps in the project development First of all the analysis time wasn t enought to evaluate all the project that was because a lot of time we had problems finding ways to do searchs finally we decided to do it with the filestube API but we evaluated another alternatives Also we prepared the environment with Eclipse Android SDK the plugin for Eclipse and also the emulator After that in the programming module we spent about 1 month learning Android programming all the possibilities that Android allow us to do Also the structures of Android and how to do the project on eclipse Maybe the implementation was the module which didn t has changes after doing the project we thought to spent 3 months implementing and we did a correct selection And later the two last modules was completely wrong that was because the documentation period started at the same time of doing tests at the application The application has got a lot of bugs and some errors and we spent more than 1 month to solve them Other of the troubles we had was that we hasn t got any Android terminal in our hands so we found some people who helped us to debug the application on real devices 29 5 COMPONENTS OF THE PROJECT 5 1 Graphical User Interface In computing a graphical user interface is a type of user interface that allows users to interact
8. 3 6 XML Parser To parse the response of Filestube we use SAX Parser SAX is the Simple API for XML originally a Java only API SAX was the first widely adopted API for XML in Java and is a de facto standard The current version is SAX 2 0 1 and there are versions for several programming language environments other than Java SAX has recently switched over to the SourceForge project infrastructure The intent is to continue the open development and maintainence process for SAX no NDAs required while making it easier to track open SAX issues outside of the high volume xml dev list SAX defines standard methods to query and set feature flags and property values in an XMLReader It is possible to change parser behaviors such as requesting that an XML reader to validate or not validate a document and register new types of event handlers using the getFeature setFeature getProperty and setProperty methods The package that allow to use the saxparser is org xml sax This package provides the core SAX APIs One we have the different files that SAX Parser process we got different http links and we have to process it again to get the direct download links The HTTP Request returns us a document like this we supressed the biggest part of the Html because its too long lt div style float right padding top 2px gt lt div gt lt pre id copy_paste_links style clear both padding 6px border 1px inset ccc width 590px t
9. 4 http developer android com index html 5 http developer android com guide index html 6 http www g loaded eu 2010 10 04 rsapiget download rapidshare api 7 http images rapidshare com apidoc txt 8 http www android spa com 9 http www youtube com 10 http www droiddraw org 11 http www filestube com api html 12 http www filestube com apidoc html 13 http rapid search engine com 14 http www rapidse net 15 http webtoolsandtips com resources how to search rapidshare files for download 16 http rapidoogle com 17 http getandroidstuff com 18 http www slideshare net sullis connecting to web services on android 19 http www androidpeople com android xml parsing tutorial using saxparser 20 http www anddev org using_xmlresourceparser_to_parse_custom_compiled_xml t9313 html 21 http www anddev org parsing_xml_from_the_net using _the_saxparser t353 html 22 http www rapidravage com 23 http users dsic upv es fjabad pfc estructura pdf 24 http www xtensivearts com 2009 07 03 episode 1 getting started 25 http www xatakandroid com tutoriales primeros pasos con android instalar y desinstalar aplicaciones sin el android market 26 http www genbetadev com 27 http hubpages com hub Tips to solve the UnknownHostException on Android 72 28 https edux feld cvut cz courses Y36SI3 29 www google com 30 www htc com 31 www samsung com 73
10. android id W id text android layout_width wrap_content android layout_height wrap_content android text Hello lam a TextView gt 29 lt Button android id id button android layout_width wrap_content android layout_height wrap_content android text Hello I am a Button gt lt LinearLayout gt As we can see the different components TextViews Buttons has different properties inside his structure like the width height text inside etc 5 1 2 Layouts First of all we are going to present the interactivity of the different Screens in the application and after that we are going to say how the different layouts are This is the diagram that talks about the interactivity between the different Screens N Account List Account Detail About Dialog n a Settings E Account New Screen Screen Download List Screen Upload Detail Download Detail Screen Screen After this we are going to talk about all the layouts individualy and explain how they work Main Screen Sey A 2 10 28 pm AndDos Url files 415818244 3alpinas1_small jpg Upload Download Eea Bowntoas Download List Upload List Account List As we can see there are different components here First of all there are an EditBox where the url has to be written And after this EditBox there are 2 buttons Upload and Download Finally there are 3 bigger buttons than the 2 up of them Download List Upload List an
11. e An application can request permission to access device data such as the user s contacts SMS messages the mountable storage SD card camera Bluetooth and more All 15 application permissions must be granted by the user at install time That covers the basics regarding how an Android application exists within the system The rest of this document introduces you to e The core framework components that define your application e The manifest file in which you declare components and required device features for your application e Resources that are separate from the application code and allow your application to gracefully optimize its behavior for a variety of device configurations The different components of an Android application are Activities An activity represents a single screen with a user interface For example an email application might have one activity that shows a list of new emails another activity to compose an email and another activity for reading emails Although the activities work together to forma cohesive user experience in the email application each one is independent of the others As such a different application can start any one of these activities if the email application allows it For example a camera application can start the activity in the email application that composes new mail in order for the user to share a picture An activity is implemented as a subclass of Activity and you can learn
12. listener downloadFinish this else listener downloadStop this downloadIsRunning false This is the code that allows the application to connect the Rapidshare api we did a buffer that reads the answer and the fileSaver writes the file on the buffer Once the file is downloaded it ends 5 7 3 FILESTUBE API The application contacts the Filestube API using the SearchMaker class This class connects the API using again the HttpRetriever explained before and it evaluates the answer using the parsers This is because the API returns a XML text in his answer 65 public ArrayList lt SearchResult gt makeSearch String phrase String url constructSearchUrl phrase String response null ArrayList lt SearchResult gt result new ArrayList lt SearchResult gt Log d getClass getSimpleName response for int i 1 i lt Globals MAX SEARCHS i response httpRetriever retrieve url amp page Integer toString i amp extension Globals extension if response null response else result addAll xmlParser parseSearchResultResponse response response trim This code do searchs until we get the number indicated in the parameter MAX_SEARCHS defined in the options of the search And it adds to the array of answers the response of the XML Parser so adds the links to the result After we had all the links answered by the api we
13. ln Iw le Col cal e a An Android Virtual Device AVD is an emulator configuration that lets you model an actual device by defining hardware and software options to be emulated by the Android Emulator 2 2 The easiest way to create an AVD is to use the graphical AVD Manager which you launch from Eclipse by clicking Window gt Android SDK and AVD Manager You can also start the AVD Manager from the command line by calling the android tool in the tools directory of the Android SDK You can also create AVDs on the command line by passing the android tool options An AVD consists of e A hardware profile Defines the hardware features of the virtual device For example you can define whether the device has a camera whether it uses a physical QWERTY keyboard or a dialing pad how much memory it has and so on e A mapping to a system image You can define what version of the Android platform will run on the virtual device You can choose a version of the standard Android platform or the system image packaged with an SDK add on e Other options You can specify the emulator skin you want to use with the AVD which lets you control the screen dimensions appearance and so on You can also specify the emulated SD card to use with the AVD e A dedicated storage area on your development machine the device s user data installed applications settings and so on and emulated SD card are stored in this area You can create as many AVDs a
14. of Android Canalys reported that in Q4 2010 the Android operating system was the world s best selling smartphone platform dethroning Nokia s Symbian from the 10 year top position Jumping from 23 5 percent Android now represents 31 2 percent of the U S smartphone market According to Gartner Symbian is still slightly ahead on sales if some legacy non Nokia Symbian smartphones are included in the Q4 2010 figures Android has a large community of developers writing application programs apps that extend the functionality of the devices There are currently over 150 000 apps available for Android Android Market is the online app store run by Google though apps can also be downloaded from third party sites Developers write primarily in the Java language controlling the device via Google developed Java libraries The unveiling of the Android distribution on 5 November 2007 was announced with the founding of the Open Handset Alliance a consortium of 80 hardware software and telecom companies devoted to advancing open standards for mobile devices Google released most of the Android code under the Apache License a free software and open source license The Android open source software stack consists of Java applications running on a Java based object oriented application framework on top of Java core libraries running on a Dalvik virtual machine featuring JIT compilation Libraries written in C include the surface manager OpenCore media fra
15. of that file lt string lt string lt string lt string lt string lt string lt string nam e titleHistorialList gt AndDos Historial List lt string gt name textNoHistorialElements gt No elements in the Historial lt string gt name TextResultsHistorialRowWrited gt Number Results lt string gt nam nam nam nam e TextExtensionHistorialRowWrited gt Extension lt string gt e TextSearchsHistorialRowWrited gt Number Searchs lt string gt e TextNameHistorialRowWrited gt Search lt string gt e TextProvidersHistorialRowWrited gt Providers lt string gt 5 6 GLOBALS There are also another file with different variables this variables are used to positionate the menus besides there are another functionality to them One variable is used to control the Historial Table of the database and some other functionalities like the parameters of the searchs Options of the Search This is used to check if some options are active or inactive and how many providers are selected 61 public final class Globals Options menu globals public static final int ABOUT_ID Menu FIRST public static final int SEARCH ID Menu FIRST 1 public static final int SETTINGS ID Menu FIRST 2 public static final int NEWACCOUNT ID Menu FIRST 3 public static final int NEWDOWNLOAD_ID Menu FIRST 4 public static final int NEWUPLOAD ID Menu FIRST 5 Context menu globals public
16. private void saveHistorial CODE HERE mDbHelper open save account to database add check if acounts info exists on rapidshare if Globals numberHistorialElements 20 ok mDbHelper updateHistorialElement Globals HistorialIdMin name Globals HistorialIdMax 1 extension Integer toString Globals MAX SEARCHS Nresult rapidshare megaupload filesonic fileserve megashares hotfile if ok false Log v Historial Table Update Error updating the table else Globals HistorialIdMax else if Globals numberHistorialElements lt 20 id mDbHelper createHistorialElement Globals HistorialIdMax 1 name extension Integer toString Globals MAX SEARCHS Nresult rapidshare megaupload filesonic fileserve megashares hotfile if id lt 0 add fail to store into database else Globals HistorialldMax Globals numberHistorialElements mDbHelper close 56 This method SaveHistorial check if the database of the searchs is full 20 elements if is not it store the search But if it s full it delete the older element and put the new one in his place 5 ShowOptions Activity This activity is associated with the layout Options Search His functionality is to save the new parameters that we want to use in our searchs But also there are a few security checks to allow a correct functionality from the layour F
17. search if you want b Part of the list of files founded is displayed This part is explained like a list of elements that displays some info about the files founded 297 Options Search Screen aM e 10 38 pm AndDos Search Options Choose the providers to search Rapidshare MM Megaupload Fileserve 9 Megashares Filesonic ay Hotfile 4 Choose the number of searchs 1 15 10 Choose the extension of the files all extensions Y Here we have some differents elements displayed a CheckBox Used here to determinate which providers are used in the search b Spinner The functionality of the spinner is to select the extension of the file that we want to search 38 Choose a extension all extensions rar wmv avi mpg mpeg c TextView To write the number of searchs we want to do d Button To save the new options 39 000 Historial Screen DM E 10 41 pm AndDos Historial List Search blur 2 Extension All extensions Number Searchs 10 Number Results 7 Providers rapidshare megaupload fileserve megashares Search estopa Extension All extensions Number Searchs 10 Number Results 0 Providers rapidshare Search mario 64 Extension All extensions Number Searchs 10 Number Results 2 Providers rapidshare Search mario 64 Extension zip Number Searchs 3 Number Results 2 Providers rapidshare megaupload fileserve fileso
18. select the only ones that we want This is because we cannot select the providers of the answer so we have to filter it if isToDelete itemResponse toDelete add i else if Globals megaupload amp amp itemResponse contains megaupload com item setAddress itemResponse if Globals rapidshare amp amp itemResponse contains rapidshare com item setAddress itemResponse if Globals fileserve amp amp itemResponse contains fileserve com item setAddress itemResponse if Globals megashares amp amp itemResponse contains megashares com item setAddress itemResponse if Globals filesonic amp amp itemResponse contains filesonic com item setAddress itemResponse if Globals hotfile amp amp itemResponse contains hotfile com item setAddress itemResponse 66 Finally we return the value of result to the layout and it displays all the links and his information size extension 5 7 4 XML PARSER After the Filestube API returns us the XML file with all the files to download we have to process that XML file to extract the information that we want from it The SaxParser allows us to do that so we can evaluate the xml using the method parseSearchResultResponse at the SearchMaker class public ArrayList lt SearchResult gt parseSearchResultResponse String xml try XMLReader xm
19. static final int DELETEACCOUNT ID public static final int DELETEDOWNLOAD ID Menu FIRST 10 Menu FIRST 11 public static final int DELETEUPLOAD ID Menu FIRST 12 Settings keys public static final String PREFS NAME AnddosSettings public static final String DATA FOLDER dataFolder Search Globals public static int MAX SEARCHS 10 public static boolean rapidshare true public static boolean megaupload false public static boolean fileserve false public static boolean megashares false public static boolean filesonic false public static boolean hotfile false public static String extension public static int POS EXTENSION 0 public static String AllExtensions All extensions Historial globals public static long HistorialldMin 1 public static long HistorialldMax 1 public static long numberHistorialElements 1 5 7 NETWORK The network on our application is only used when we do a search or we are downloading uploading any file It s managed by the libraries of Android and other libraries that we found on Internet 62 5 7 1 HTTP CONNECTIONS For the HTTP Connections we used the org apache http librarie The core interfaces and classes of the HTTP components These deal with the fundamental things required for using the HTTP protocol such as representing a message including it s headers and optional entity and connections over which messages are sent
20. the Search we call the Search Activity Is the same for all the buttons in the Activity we did the connection between buttons and layouts starting each activity when his button is clicked 2 AccountList Activity This Acitivity works the same way as the DownloadList Activity and UploadList Activity First in the onCreate method we call the Databases to fill the information about all the accounts This is possible thanks to the android database Cursor library private void fillData Get all of the rows from the database and create the item list mDbHelper open Cursor accountsCursor mDbHelper getAllAccounts startManagingCursor accountsCursor 5 Create an array to specify the fields we want to display in the list only TITLE String from new String AnddosDbAdapter colAccountUsername AnddosDbAdapter colAccountService and an array of the fields we want to bind those fields to int to new int R id textAccountRow R id textAccountRowService Now create a simple cursor adapter and set it to display SimpleCursorAdapter accounts new SimpleCursorAdapter this R layout account_list_row accountsCursor from to make message to user if no accounts is in database if accounts getCount 0 Toast makeText this R string textNoAccounts Toast LENGTH SHORT show listAccounts setAdapter accounts mDbHelper close We have different mehods in ou
21. uploads works like threads because this class extends Thread class This provider uses the class RapidshareUploadProvider to interconnect the application with the Rapidshare API Override public void onCreate super onCreate this dbProvider new DatabaseProvider this getApplicationContext this upload new UploadProviderThread this dbProvider this this upload start UploadProviderService running true this displayInformation this getText R string uploadServiceStarted toString WifiManager wm WifiManager getSystemService WIFI SERVICE this lock wm createWifiLock UploadWifiLock this lock acquire public void displayInformation String text Toast makeText this getApplicationContext text Toast LENGTH SHORT show 59 5 4 DATABASES The database are very important in the application this is due to we have to store information between executions of it The information we want to store is involved with Accounts Downloads Searchs Uploads most part of the application needs it This are the different tables of our database a Historial Table This table is used to store the different searchs we did and also the parameters used for that searchs It is a little table because we only allow 20 elements try db execSQL CREATE TABLE IF NOT EXISTS HistorialTable tee 4 4 g
22. with electronic devices with images rather than text commands GUIs can be used in computers hand held devices such as MP3 players portable media players or gaming devices household appliances and office equipment A GUI represents the information and actions available to a user through graphical icons and visual indicators such as secondary notation as opposed to text based interfaces typed command labels or text navigation The actions are usually performed through direct manipulation of the graphical elements In an Android application the user interface is built using View and ViewGroup objects There are many types of views and view groups each of which is a descendant of the View class View objects are the basic units of user interface expression on the Android platform The View class serves as the base for subclasses called widgets which offer fully implemented UI objects like text fields and buttons The ViewGroup class serves as the base for subclasses called layouts which offer different kinds of layout architecture like linear tabular and relative A View object is a data structure whose properties store the layout parameters and content for a specific rectangular area of the screen A View object handles its own measurement layout drawing focus change scrolling and key gesture interactions for the rectangular area of the screen in which it resides As an object in the user interface a View is also a point of interac
23. E is often called Eclipse ADT for Ada Eclipse CDT for C C Eclipse JDT for Java and Eclipse PDT for PHP The initial codebase originated from VisualAge In its default form it is meant for Java developers consisting of the Java Development Tools JDT Users can extend its abilities by installing plug ins written for the Eclipse software framework such as development toolkits for other programming languages and can write and contribute their own plug in modules Released under the terms of the Eclipse Public License Eclipse is free and open source software 2 4 PLUGIN FOR ECLIPSE Android SDK Android offers a custom plugin for the Eclipse IDE called Android Development Tools ADT that is designed to give you a powerful integrated environment in which to build Android f applications It extends the capabilites of Eclipse to let you quickly set up new Android projects create an application UI debug your applications using the Android SDK tools and even export signed or unsigned APKs in order to distribute your application In general developing in Eclipse with ADT is a highly recommended approach and is the fastest way to get started with Android Once you have installed the ADT for Eclipse you can start developing your Android application 2 5 ANDROID VIRTUAL MACHINE 0000 gt Mu O MOS ANDROID _ 5 12 13 Ja 5 s 7 Ja Jo o o Ju le Je ja Ju fu x Jo fe cs o Je Jo Ju Ju Juo ju jes alz lx Je ly ls
24. In order to prepare messages before sending or after receiving there are interceptors for requests and responses For use that library we implemented the class HttpRetriever public class HttpRetriever private DefaultHttpClient client new DefaultHttpClient public String retrieve String uri HttpGet getRequest new HttpGet uri try HttpResponse getResponse client execut final int statusCode getResponse getStatusLine getStatusCode if statusCode HttpStatus SC_OK Log w getClass getSimpleName Error for URL uri toString return null HttpEntity getResponseEntity getRespons getRequest statusCode if getResponseEntity null getEntity return EntityUtils toString getResponseEntity catch IOException e getRequest abort Log w getClass getSimpleName Error for URL uri toString e return null public InputStream retrieveStream String url 63 HttpGet getRequest new HttpGet url try HttpResponse getResponse client execute getRequest final int statusCode getResponse getStatusLine getStatusCode if statusCode HttpStatus SC_OK Log w getClass getSimpleName Error statusCode for URL Y url return null HttpEntity getResponseEntity getResponse getEntity return getResponseEntity getCon
25. Provider holding the data To be of use with Context startActivity all activity classes must have a corresponding lt activity gt declaration in their package s AndroidManifest xml The Activity class is an important part of an application s overall lifecycle and the way activities are launched and put together is a fundamental part of the platform s application model After explaining what is an Activity on Android we are going to explain the most important Activities from the project and his development 49 1 MainActivity As his name indicate this is the principal activity of the application The one which controls the navigation of the different Screens In his method OnCreate called when the Activity starts his execution we associate the buttons to local variables of the class that allows us to manage the navigation between the layouts buttonDownloadList Button findViewById R id buttonDownloadList buttonDownloadList setOnClickListener new View OnClickListener public void onClick View v startDownloadList 3 buttonUploadList Button findViewById R id buttonUploadList buttonUploadList setOnClickListener new View OnClickListener public void onClick View v startUploadList e button to new download click listener buttonDownload Button findViewById R id buttonDownload buttonDownload setOnClickListener new View OnClickListener
26. TECHNICKE V PRAZE ae a W Android Download and Search Service FINAL PROJECT Autor Carlos Mart nez P rez carmar45 inf upv es Director Tom ern tomas cerny fel cvut cz CoDirector Juan Carlos Ruiz jcruizg disca upv es Titulaci n Ingeniero Inform tico 11 07 2011 1 2 3 INDEX Introduction 1 1 Introduction 1 2 Problem 1 3 Goals Work Station 2 1 What is Android 2 2 Java 2 3 Eclipse 2 4 Plugin Android for Eclipse 2 5 Android Virtual Machine 2 6 Defining the Work Station 2 7 Why Android 2 8 How Android Works 2 9 System Requirements Technologies 3 1 SQLite 3 2 Android 2 2 3 3 Network 3 4 Rapidshare API 3 5 Filestube API 3 6 XML Parser Defining the Project 4 1 Phases of the project 4 2 Gantt diagram Before 4 3 Gantt diagram After 4 4 Comparing Both diagrams Components of the project 5 1 GUI 5 1 1 XML 5 1 2 All layouts 5 2 Activities 5 3 Services 5 4 Databases 5 5 Strings 5 6 Globals 5 7 Network 5 7 1 Http Connections 5 7 2 Rapidshare API 5 7 3 Filestube API 5 7 4 XML Parser Testing Problems Solutions Thinking in the future Bibliography 1 INTRODUCTION 1 1 INTRODUCTION Android one of the Operating Systems for mobile devices tables more used in the actuality offers a lot of applications to the mobile sector Due to the constant innovation in this sector we think it is neccesary an application in this
27. TION As we see in the introduction we have to configure different kinds of utilities to develop an Android application Then to develop our application i installed and configurated this different utilities Eclipse 3 6 1 Helios Android Development Toolkit for 2 2 platform Api level 8 Java 1 5 compiler Android Virtual Device Platform 2 2 Api level 8 SD card 64Mb Skin HVGA 320x480 2 7 WHY ANDROID The Android version choosed for the application is the called Froyo Android 2 2 because was the last version of the Operating System at the moment of the project started his development So it has to work in latest versions of Android without any problem Android has a Linux Kernel security memory management proccess events depends on it The kernel also works like an abstraction between the hardware and the rest of the software stack 4 2 8 HOW ANDROID WORKS Android applications are written in the Java programming language The Android SDK tools compile the code along with any data and resource files into an Android package an archive file with an apk suffix All the code in a single apk file is considered to be one application and is the file that Android powered devices use to install the application Once installed on a device each Android application lives in its own security sandbox e The Android operating system is a multi user Linux system in which each application is a different us
28. called Params Progress and Result and 4 steps called onPreExecute doInBackground onProgressUpdate and onPostExecute Still sometimes due to bad internet connection searches can take a while c Another problem encountered during development was able to store in the device some of the data that the application needs to have full functionality after closing the application and reopen it This was solved using the database explained before in which tables we store all the information necessary for the proper functioning of the application after each of his executions d And finally we had a problem of matching each new version of the api that Rapidshare updates to fit in our application 70 8 THINKING IN THE FUTURE Since AndDOSS is an application developed for Android the intention is to further develop once delivered as final project and maybe someday be able to upload to AndroidMarket users can enjoy it So have raised several ideas to improve implementation in half term which aim to bring out new features and enhancements adding to the application Approaches that have been designed to improve the application were as follows Adapt AndDOSS version to older versions of the OS This idea arises in order to make a version that can work in more Android devices Initially sets the objective to lower the requirements to the 2 0 version of Android this is because most of Android devices already have a version greater than
29. chonologies we used to develop AndDoSS was the Rapidshare official API It allows to different operations in his system like download files upload files login with your account manage your folders inside rapidshare Rapidshare API was created because sometimes programming errors in popular tools might cause an unwanted DDOS attack to the RapidShare servers Thats why they develop this official API The API works doing calls to https api rapidshare com cgi bin rsapi cgi sub subroutine recommended http api rapidshare com cgi bin rsapi cgi sub subroutine without SSL possible as well Where subroutine is one activity inside this parameters we are not going to put all because they are explained in the official API document a getaccountdetails Returns key pair values for the specific account b setaccountdetails Changes the settings of an account Every parameter is optional Not transmitting a parameter name means not changing it c download Call this function to download a file from RapidShare And much more subroutines f 3 5 FILESTUBE API The Filestube service was found in the first part of the project it allows the application to search Rapidshare files but there are more providers in his search engine Before using the API you must get a unique key This key it s provided when u are registered on his service as a new user Here is an example that explain how the api works 1 Request htt
30. d Account List This 5 buttons send you to another window depending in which one you click 34 Also if you click the Menu button you get some options of the application BM 10 36 pm AndDos Url files 415818244 3alpinas1_small jpd Upload Download Download List Upload List q Q About Settings Search We can see at the bottom three options About Settings and Search The Search send you to the searcher that allows you to look for files in internet Into Settings button you can modify some parameters from the application 35 Settings Screen AM E 10 34 pm Data Folder mnt sdcard Download Choose Default download date Today 7 Default download time 00 00 Save and Close In this screen we can see a new component of the application a Spinner that allows us to change the download date of the application also the default folder where we are going to download files If we click the button Choose the next layout is displayed About screen About AndDos Android Download Service AndDos Version 1 1 Close 36 This is the version of the application and some comments of it Search Screen AM 10 37 pm AndDos Search Qes The search screen is divided in 2 different parts a Part of search with his EditText his button to activate the search and another button that displays some parameters to change the
31. e information about the upload is displayed here its like the Download detail screen very similar New Upload Screen BM 43 10 29 pm AndDos New Upload File crocs Account Bale Upload Now i 48 In this layout we have an EditText with the rute to the file we want to upload and we have a Spinner to select the account that we want to manage the upload Also we can create a new account from here the same as the new download layout allows 5 2 ACTIVITIES An activity is a single focused thing that the user can do Almost all activities interact with the user So the Activity class takes care of creating a window for you in which you can place your UI with setContentView View While activities are often presented to the user as full screen windows they can also be used in other ways as floating windows via a theme with windowlsFloating set or embedded inside of another activity using ActivityGroup There are two methods almost all subclasses of Activity will implement e onCreate Bundle is where you initialize your activity Most importantly here you will usually call setContentView int with a layout resource defining your UI and using findViewByld int to retrieve the widgets in that UI that you need to interact with programmatically e onPause is where you deal with the user leaving your activity Most importantly any changes made by the user should at this point be committed usually to the Content
32. equired for the interface and some concepts that need to be clear about Android 2 Implementation phase This phase is divided into two parts the first is the realization of a user friendly and simple interface without overloading the application In the second part developing the code necessary for the proper functioning of the application and finally integrate with the user interface 3 Debugging phase Perform various tests on the application until do it stable and correct Without getting errors and controlling everything that derives from it to avoid exceptions and others Also test your application on multiple mobile devices to ensure its operation in real hardware that runs Android Operating System 4 Documentation Phase Writing the project report indicating all technical and logistical details required for the 26 project as well as explaining the operation of the application with a user manual 4 2 GANTT DIAGRAM BEFORE This is the Gantt diagram before the project was started Suso jeul4 uonejuewinsog UOIJEWOJU 385 uoezuawajdw Z 7 4 3 Gantt diagram After This is the Gantt diagram after finish the project _october_ november december january february march april may Analysis Get information GUI Implementation Testing Documentation Final Testing
33. er By default the system assigns each application a unique Linux user ID the ID is used only by the system and is unknown to the application The system sets permissions for all the files in an application so that only the user ID assigned to that application can access them e Each process has its own virtual machine VM so an application s code runs in isolation from other applications e By default every application runs in its own Linux process Android starts the process when any of the application s components need to be executed then shuts down the process when it s no longer needed or when the system must recover memory for other applications In this way the Android system implements the principle of least privilege That is each application by default has access only to the components that it requires to do its work and no more This creates a very secure environment in which an application cannot access parts of the system for which it is not given permission However there are ways for an application to share data with other applications and for an application to access system services e It s possible to arrange for two applications to share the same Linux user ID in which case they are able to access each other s files To conserve system resources applications with the same user ID can also arrange to run in the same Linux process and share the same VM the applications must also be signed with the same certificate
34. ext align left background fff overflow auto max height 500px height 32px gt http www wupload com file w867 12381812 Britney_Spears_ _Femme Fatale rar lt pre gt lt div gt lt script type text javascript src http static filestube com files javascript ZeroClipboard js gt lt script gt lt div id d_clip_container style position relative gt lt div id d_clip_msg_copied gt Copiado lt div gt lt div id d_clip_button gt Copiar en el portapapeles lt div gt lt a 24 href http www filestube com dmca html id d_abuse_button gt Informar de un abuso lt a gt lt div gt lt br class clear gt lt script language JavaScript gt initCopyToClipboard lt script gt lt script src http cdn gigya com wildfire js wfapiv2 js gt lt script gt Then we examine the response from the server and we extract the direct download link of the file 25 4 Defining the Project 4 1 Phases of the project 1 Analysis phase Getting as much information as possible on the Internet books and other projects At this stage the main goal was to see whether the project would be viable in the future that is if would get our purpose in developing the application Thanks to the searches we get a successful project proposal and how to do it Also needed a little learning to start developing on Android as it does not resemble any kind of development seen during the degreee we learned Java but XML is also r
35. ive such as MP3 playback or blocking such as networking operations it should spawn its own thread in which to do that work More information on this can be found in Processes and Threads The IntentService class is available as a standard implementation of Service that has its own thread where it schedules its work to be done After this explanation about the services we are going to talk about the two main Services in the application 1 DownloadProvider Service The DownloadProvider Service has the aim to execute the different downloads that we start on the DownloadNew Activity and manage them Also the downloads works like threads because this class extends Thread class This provider uses the class RapidshareDownloadProvider to interconnect the application with the Rapidshare API Override public void onCreate super onCreate this nm NotificationManager getSystemService NOTIFICATION SERVICE this pt new DownloadProviderThread this this pt start DownloadProviderService running true this displayInformation getText R string downloadServiceStarted 58 toString WifiManager wm WifiManager getSystemService WIFI SERVICE this wifilock wm createWifiLock DownloadWifiLock this wifiLock acquire 2 UploadProvider Service The UploadProvider Service has the aim to execute the different uploads that we start on the UploadNew Activity and manage them Also the
36. lreader initializeReader SearchResultHandler personHandler new SearchResultHandler assign our handler xmlreader setContentHandler personHandler perform the synchronous parse xmlreader parse new InputSource new StringReader xml return personHandler retrieveSearchResultList catch Exception e e printStackTrace return null After this we have the links of the files we want to analize 267 6 TESTING After lot of debug we think the application is enought stable We tested it in different ways first of all we tested it on the Android Virtual Machine This was very useful to correct a few bugs and exceptions that we are going to explain later Also we tested the application in real devices for 2 weeks Concretely we used this 2 devices both of them with Android 2 2 Samgung Galaxy S Network HSUPA 900 1900 2100 EDGE GPRS 850 900 1800 1900 Dimension 64 2 X 122 4 X 9 9 mm 119g Display 4 0 WVGA 480x800 16M SUPER AMOLED mDNIe Mobile Digital Natural Image engine Processor 1GHz CPU Speed HTC Desire Display Type Touch sensitive screen with pinch to zoom capability Size 3 7 inches Resolution 480 X 800 WVGA CPU Processing Speed 1 GHz 68 Storage ROM 512 MB RAM 576 MB Internet 3G Up to 7 2 Mbps download speed Up to 2 Mbps upload speed GPRS Up to 114 kbps downloading EDGE Up to 560 kbps downloading Wi Fi
37. mework SQLite relational database management system OpenGL ES 2 0 3D graphics API WebKit layout engine SGL graphics engine SSL and Bionic libc The Android operating system consists of 12 million lines of code including 3 million lines of XML 2 8 million lines of C 2 1 million lines of Java and 1 75 million lines of C The most recent released versions of Android are e 2 0 2 1 Eclair which revamped the user interface and introduced HTML5 and Exchange ActiveSync 2 5 support 2 2 Froyo which introduced speed improvements with JIT optimization and the Chrome V8 JavaScript engine and added Wi Fi hotspot tethering and Adobe Flash support e 2 3 Gingerbread which refined the user interface improved the soft keyboard and copy paste features and added support for Near Field Communication e 3 0 Honeycomb a tablet oriented release which supports larger screen devices and introduces many new user interface features and supports multicore processors and hardware acceleration for graphics The Honeycomb SDK has been released and the first device featuring this version the Motorola Xoom tablet went on sale in February 2011 2 2 JAVA Java Java is a programming language originally developed by James Gosling at Sun Microsystems which is now a subsidiary of Oracle Corporation and released in 1995 as a core component of Sun Microsystems Java platform The language derives much of its syntax from C and C but has a simpler
38. more about it in the Activities developer guide Services A service is a component that runs in the background to perform long running operations or to perform work for remote processes A service does not provide a user interface For example a service might play music in the background while the user is in a different application or it might fetch data over the network without blocking user interaction with an activity Another component such as an activity can start the service and let it run or bind to it in order to interact with it 16 A service is implemented as a subclass of Service and you can learn more about it in the Services developer guide Content providers A content provider manages a shared set of application data You can store the data in the file system an SQLite database on the web or any other persistent storage location your application can access Through the content provider other applications can query or even modify the data if the content provider allows it For example the Android system provides a content provider that manages the user s contact information As such any application with the proper permissions can query part of the content provider such as ContactsContract Data to read and write information about a particular person Content providers are also useful for reading and writing data that is private to your application and not shared For example the Note Pad sample application u
39. nic megashares hotfile Search blur 2 The Historial Screen is a Scroll View that show us the last searchs we did That s displayed like a list with different TextViews as we can see at the photo We can look at the options we had when we did that search 40 Account List If we are in the Main Screen and we click on Account List button we can see the list of the different accounts that we stored on the application a Al GB 10 32 em AndDos Account List This layout is very similar to the Historial Screen but the information displayed is the name and the provider used by the account This is possible with the TextViews If we click the Menu of our Android device we have the possibility to create a new Account in the next layout New Account Screen Also if we click in one of the accounts displayed the layout Details Account is displayed we explain this layout later 4 New Account Screen a Al 10 30 em Service rapidshare com Y Username Enter your username Password Pp an nn a Enter your password Save This is the layout to create new accounts in the application to download files or upload We have to select the Service at this moment only Rapidshare com and after write in two TextViews the username and the password of our account 42 Account Detail Screen DME 10 54 pm Service rapidshare com Username Carlos Email RapidPro valid until
40. o rapidshare to download upload files also the search needs to connect to another webpages to do his funcionality so every principal features of the application needs internet connection 2 Device with Operating System Android 2 2 or higher This only allows to install it on modern devices less than 2 years at the moment 3 The download upload to Rapidshare provider it s only with a Rapidshare account right now Maybe in future funcionalities of the application we can add more flexibility in this step The searcher doesn t need the account 18 3 TECHONOLOGIES 3 1 SQLite Mori SQLite is a software library that implements a self contained serverless zero configuration transactional SQL database engine SQLite is the most widely deployed SQL database engine in the world The source code for SQLite is in the public domain Android contains the SQLite database management classes that an application would use to manage its own private database This class is on the package android database sqlite Applications use these classes to manage private databases If creating a content provider you will probably have to use these classes to create and manage your own database to store content See Content Providers to learn the conventions for implementing a content provider See the NotePadProvider class in the NotePad sample application in the SDK for an example of a content provider Android ships with SQLite versi
41. object model and fewer low level facilities Java applications are typically compiled to bytecode class file that can run on any Java Virtual Machine JVM regardless of computer architecture Java is a general purpose concurrent class based object oriented language that is specifically designed to have as few implementation dependencies as possible It is intended to let application developers write once run anywhere Java is currently one of the most popular programming languages in use and is widely used from application software to web applications The original and reference implementation Java compilers virtual machines and class libraries were developed by Sun from 1995 As of May 2007 in compliance with the specifications of the Java Community Process Sun relicensed most of its Java technologies under the GNU General Public License Others have also developed alternative implementations of these Sun technologies such as the GNU Compiler for Java GNU Classpath and Dalvik 10 2 3 ECLIPSE eclipse HELIOS Eclipse is a multi language software development environment comprising an integrated development environment IDE and an extensible plug in system It is written mostly in Java and can be used to develop applications in Java and by means of various plug ins other programming languages including Ada C C COBOL Perl PHP Python Ruby including Ruby on Rails framework Scala Clojure and Scheme The ID
42. on 3 4 0 Also we can manage the database out of the application with the tools provided by the Android SDK this is the sqlite3 database tool in the tools folder You can use this tool to browse or run SQL commands on the device Run by typing sqlite3 in a shell window 19 3 2 ANDROID 2 2 Android 2 2 is a minor platform release including user features developer features API changes and bug fixes The code name for this version is Froyo and it adds new features bug fixing and different updates The most important update is the new 2 6 32 kernel and also Android 2 2 accepts more than 256Mb of Ram memory 3 3 NETWORK AndDOSS uses a few tools to connecting to internet The system allows to use the application with 3GP connection and also with WIFI The technologie that we use to connect to the network is org apache http The core interfaces and classes of the HTTP components These deal with the fundamental things required for using the HTTP protocol such as representing a message including it s headers and optional entity and connections over which messages are sent In order to prepare messages before sending or after receiving there are interceptors for 230 requests and responses This is because this package is included in the SDK of Android and is well integrated into it Easy way to do HTTP Request and every operations relationated with the network 3 4 RAPIDSHARE API Another of the te
43. or equal to 2 0 Later perhaps apply enhancements that make it compatible with even older versions Add support for new providers to download files search in a more efficient way This is one of the major improvements we wish to make As a good download manager we want to add new suppliers to download upload files to the Internet Also wish to contact directly with suppliers to carry out the searches were not made through third party services available on the Internet but through their own databases systems using the providers this would eliminate much of the computing necessary for the carrying out of searches with a improvement in time Initially contact with Rapidshare to search your file system should be a priority because it is the only supplier currently available for download in AndDoSS Then add support for it and other providers Megaupload Fileserver Filesonic etc Improve the application to make it faster searchs As mentioned in the previous section contact the search providers and they provide us some improvement in the searchs it would be very important But we also must continue to explore other fields such as threads threads or a previously saved search in history not to have to make it again From there you can follow several routes that could provide a substantial improvement in the application 7 9 BIBLIOGRAPHY 1 http en wikipedia org 2 http www eclipse org 3 http www android com
44. or example one of the Providers Checkbox has to be checked if checkboxRapidshare isChecked amp amp checkboxMegaupload isChecked amp amp IcheckboxMegashares isChecked amp amp checkboxFileserve isChecked amp amp IcheckboxFilesonic isChecked amp amp checkboxHotfile isChecked flag 2 Besides the number of the EditText should be between 1 and 15 If this conditions are satisfied the new parameters are saved for the searchs and if not a message is displayed on the screen Error in number if flag 1 Toast makeText this Number between 1 15 Toast LENGTH SHORT show Error in providers else if flag 2 Toast makeText this Almost 1 provider to search Toast LENGTH SHORT show This are the most importante Activities of the application next we are going to explain the services 57 5 3 SERVICES A Service is an application component representing either an application s desire to perform a longer running operation while not interacting with the user or to supply functionality for other applications to use Each service class must have a corresponding lt service gt declaration in its package s AndroidManifest xml Services can be started with Context startService and Context bindService Note that services like other application objects run in the main thread of their hosting process This means that if your service is going to do any CPU intens
45. ownloadFilename TEXT NOT NULL colDownloadStatus NTEGER NOT NULL colDownloadPriority NTEGER NOT NULL colDownloadAccount NTEGER NOT NULL FOREIGN KEY REFERENCES accountsTable amy r 60 ER PRIMARY KEY AUTOINCR colDownloadUrl pu EM ENT colDownloadAccount COLACCOUNETD d Uploads Table The same than the Downloads Table But for uploads db execSQL CR EATE TABLE IF NOT EXISTS uploadsTable colUploadID INTEGER PRIMARY KEY AUTOINCREMENT colUploadFilepath TEXT NOT NULL colUploadFilename TEXT NOT NULL colUploadStatus INTEGER NOT NULL colUploadAccount INTEGER NOT NULL FOREIGN KEY colUploadAccount REFERENCES accountsTable colAccountID EP All this tables are managed with an Adapter that allows us to work with them easily The Adapter is defined AnddosDbAdapter Inside them we have the definition of the tables and also a lot of methods to work with them Create Delete and Update elements get information 5 5 STRINGS The application has a Strings xml file due to don t repeat the same strings again and again Its located on the file res values strings xml And inside are almost the most quantity of the strings we used on the application This is a part
46. p api filestube com key 2c17a6258659780e0bc6d2ca41ab731e amp phrase britney 2 Diferents kinds of Response from filestube in XML 1 Successful response for the example request above lt answer gt lt hasResults gt 1 lt hasResults gt lt results gt lt hitsTotal gt 603 lt hitsTotal gt lt pageNumber gt 2 lt pageNumber gt lt hitsForThisPage gt 10 lt hitsForThisPage gt lt hits id 11 gt lt name gt I_am_a_good_daughter_ _Britney part1 rar lt name gt lt extension gt rar lt extension gt lt size gt 98 MB lt size gt lt description gt No description saved lt description gt lt address gt http www filestube com 91539aa90c9c531d03e9 go html 2 lt address gt lt details gt http www filestube com 91539aa90c9c531d03e9 details html lt details gt lt tags gt good daughter britney lt tags gt lt rate gt 0 00 lt rate gt lt added gt 2007 09 17 00 44 16 lt added gt lt related gt 14f84a6dab7f39c603e9 lt related gt lt password gt lt hits gt lt hits id 12 gt lt hits gt lt hits id 20 gt lt hits gt lt results gt lt answer gt 2 No results were found or wrong phrase given with a related token lt answer gt lt hasResults gt 0 lt hasResults gt lt answer gt 3 Error response message if something went wrong or invalid data were used lt error gt lt message gt No phrase specified lt message gt J23 lt error gt
47. public void onClick View view startNewDownload e button to new upload click listener buttonUpload Button findViewById R id buttonUpload buttonUpload setOnClickListener new View OnClickListener public void onClick View view startNewUpload 3 button to account list click listener buttonAccountList Button findViewById R id buttonAccountList buttonAccountList setOnClickListener new View OnClickListener public void onClick View view startAccountList he Also we modify the default Menu of Android applications and we add the new item Search that one sends us to the Search Screen 50 Override public boolean onCreateOptionsMenu Menu menu super onCreateOptionsMenu menu add new menu item to Options menu other items are defined in OptionsMenuActivity menu add 0 Globals SEARCH ID 0 R string menuSearch setIcon android R drawable ic_menu_search return true Override public boolean onMenultemSelected int featureld Menultem item handling menu items click switch item getItemId case Globals SEARCH ID start search activity Intent searchActivity new Intent this SearchActivity class startActivity searchActivity return true return super onMenultemSelected featureId item The onMenultemSelected method is called when one of the items of the menu is clicked If that element is
48. r Database Class to get the information we want in each layout of the application For example here we get all the accounts and we associate it to the layout to be displayed on the screen Also we added the possibilitie to delete an account with a long click on an account the Context Menu is displayed and we added that option Override public void onCreateContextMenu ContextMenu menu View v ContextMenuInfo menulnfo super onCreateContextMenu menu v menulnfo create context menu for delete account menu add 0 Globals DELETEACCOUNT ID 0 R string menuDeleteAccount Override public boolean onContextItemSelected MenuItem item nandling click to delete account switch item getItemId case Globals DELETEACCOUNT ID AdapterContextMenulnfo info AdapterContextMenulnfo item getMenulInfo accountId info id createAlertDeleteAccount return true return super onContextItemSelected item This method calls the private method createAlertDeleteAccount which functionality is going E to the database and delete the selected account private void createAlertDeleteAccount create alert dialog to prevent the deletion of downloads that are linked to this account AlertDialog Builder builder new AlertDialog Builder this builder setTitle R string alertDeleteAccountTitle setMessage R string alertDeleteAccountMessage setCancelable false
49. s you need based on the types of device you want to model To thoroughly test your application you should create an AVD for each general device configuration for example different screen sizes and platform versions with which your application is compatible and test your application on each one Keep these points in mind when you are selecting a system image target for your AVD e The API Level of the target is important because your application will not be able to run on a system image whose API Level is less than that required by your application as specified in the minSdkVersion attribute of the application s manifest file e You should create at least one AVD that uses a target whose API Level is greater than that required by your application because it allows you to test the forward compatibility of your application Forward compatibility testing ensures that when users who have downloaded your application receive a system update your application will continue to function normally 293 e If your application declares a uses library element in its manifest file the application can only run on a system image in which that external library is present If you want to run your application on an emulator create an AVD that includes the required library Usually you must create such an AVD using an Add on component for the AVD s platform for example the Google APIs Add on contains the Google Maps library 2 6 DEFINING THE WORK STA
50. ses a content provider to save notes A content provider is implemented as a subclass of ContentProvider and must implement a standard set of APIs that enable other applications to perform transactions For more information see the Content Providers developer guide Broadcast receivers A broadcast receiver is a component that responds to system wide broadcast announcements Many broadcasts originate from the system for example a broadcast announcing that the screen has turned off the battery is low or a picture was captured Applications can also initiate broadcasts for example to let other applications know that some data has been downloaded to the device and is available for them to use Although broadcast receivers don t display a user interface they may create a status bar notification to alert the user when a broadcast event occurs More commonly though a broadcast receiver is just a gateway to other components and is intended to do a very minimal amount of work For instance it might initiate a service to perform some work based on the event A broadcast receiver is implemented as a subclass of BroadcastReceiver and each broadcast is 17 delivered as an Intent object For more information see the BroadcastReceiver class 2 9 SYSTEM REQUIREMENTS AndDoSS only needs three things to work like a full functional application 1 Internet connection Wifi 3GP AndDoSS need the web to work because it has to connect t
51. setPositiveButton R string alertDeletePosButton new Dialoginterface OnClickListener public void onClick DialogInterface dialog int id delete account in database and refill data from database mDbHelper open mDbHelper deleteAccount accountId mDbHelper close fillData setNegativeButton R string alertDeleteNegButton new DialogIinterface OnClickListener public void onClick DialogInterface dialog int id dialog cancel H AlertDialog alert builder create alert show Also the information on the screen is updated again calling the fillData method 3 AccountNew Activity This class has the aim to create a new account with the layout Account New getting the info in that layout and store it on the Database Here the method onCreate only associate the Buttons EditTexts and all the components inside the layout And after clicking the save button we store it save button click listener saveButton setOnClickListener new View OnClickListener public void onClick View view check for empty fields if TextUtils isEmpty mUsernameText getText TextUtils isEmpty mPasswordText getText createAlertEmptyUserOrPass else 53 saveAccount setResult RESULT OK finish private void saveAccount String service mServiceSpinner getSelectedItem toString String username mUsernameText getTe
52. t with a CheckBox download right at the moment The other layout we talked before from the Download List Screen is the Download Detail Screen the one we are going to explain now 45 Download Detail Screen a e 10 46 pm AndDos Download Detail Name of file http rapidshare com files 415818244 3alpinas1_small jpg Account Ca rlos rapidshare com 7 Status Processing uta 6 17 2011 Time 00 00 Priority Normal y i ll Save This layout represent all the information about the download selected The name of the file with his url the account which activate the download status etc All this information is displayed with TextViews Besides we can start or stop the download from here and set his priority thanks to a Spinner 46 Upload List Screen AM 10 33 pm AndDos Upload List The Upload List Screen Represents the same as the Download List but with the elements we want to upload to the Rapidshare Server to our account If we click on one of the uploads the detail about that upload is displayed But also we can start a new upload from here We do that clicking the Menu button from our Android device and after that select the option New Upload 47 Upload Detail Screen E Al 43 10 47 pm AndDos Upload Detail Path mnt sdcard Download 3alpinas1_small jpg Account Carlos rapidshare com Y Status Done Start Save All th
53. tent catch IOException e getRequest abort Log w getClass getSimpleName Error for URL url e return null This class is used to do all the gets on HTTP protocol connecting to the Filestube API 5 7 2 RAPIDSHARE API As we explain before we have services to connect to the Rapidshare API but the classes that allows us to connect inside the implementation are the RapidshareDownloadProvider class public class RapidshareDownloadProvider implements ServiceProvider private ServiceProviderListener listener private URL url private FileSaver fileSaver private final String DEFAULT API HOSTNAME api rapidshare com private boolean downloadIsRunning false URL downloadUrl createApiDownloadUrl 64 matcher group hostname fileInfo getId filelnfo getName account matcher group dlauth position System out println downloadUrl connection downloadUrl openConnection InputStream downloadStream c onnection getInputStream byte buffer new byte 4 1024 Loop can be stopped by calling stopDownload method which set downloadIsRunning for int bytes 0 bytes downloadStream read buffer gt 0 amp amp downloadIsRunning fileSaver write buffer bytes if listener null listener downloadProgress this filelnfo getSize fileSaver getPosition if listener null if downloadIsRunning
54. that configures itself to be editable e Spinner A view that displays one child at a time and lets the user pick among them 31 f Checkbox A checkbox is a specific type of two states button that can be either checked or unchecked 5 1 1 XML After explaining the most important components of an Android GUI we are going to talk about the XML Extensible Markup Language XML is a set of rules for encoding documents in machine readable form It is defined in the XML 1 0 Specification 4 produced by the W3C and several other related specifications all gratis open standards 5 The design goals of XML emphasize simplicity generality and usability over the Internet 6 It is a textual data format with strong support via Unicode for the languages of the world Although the design of XML focuses on documents it is widely used for the representation of arbitrary data structures for example in web services Many application programming interfaces APIs have been developed that software developers use to process XML data and several schema systems exist to aid in the definition of XML based languages All Android layouts are defined on XML language this is an example of a simple layout lt xml version 1 0 encoding utf 8 gt lt LinearLayout xmIns android http schemas android com apk res android android layout_width fill_parent android layout_height fill parent android orientation vertical gt lt TextView
55. tion for the user and the receiver of the interaction events In this part of the documentation we are going to explain all the details of the user interface in AndDoSS application This is the different components we use in our application 30 a Linear Layout LinearLayout aligns all children in a single direction vertically or horizontally depending on how you define the orientation attribute All children are stacked one after the other so a vertical list will only have one child per row no matter how wide they are and a horizontal list will only be one row high the height of the tallest child plus padding A LinearLayout respects margins between children and the gravity right center or left alignment of each child b Scroll View Layout container for a view hierarchy that can be scrolled by the user allowing it to be larger than the physical display A ScrollView is a FrameLayout meaning you should place one child in it containing the entire contents to scroll this child may itself be a layout manager with a complex hierarchy of objects A child that is often used is a LinearLayout in a vertical orientation presenting a vertical array of top level items that the user can scroll through c TextView Displays text to the user and optionally allows them to edit it A TextView is a complete text editor however the basic class is configured to not allow editing d EditText EditText is a thin veneer over TextView
56. xt toString m String password mPasswordText getText toString mDbHelper open save account to database long id mDbHelper createAccount service username password if id gt 0 add fail to store into database mDbHelper close AS we can see we have a method named createAccount which stores the information about the account writed on the layout HistorialList DownloadList DownloadDetails DownloadNew UploadList UploadDetails and UploadNew Activities works in the same way as the Account Activities do 4 Search Activity The Search Activity is the class responsible for doing the searches and completing the search history for each search performed The searchs are implemented with Asynchronous tasks because then they are independent of the GUI so the searchs cannont block the GUI private void performSearch String phrase editTextSearch getText toString if TextUtils isEmpty phrase createAlertNoPhrase else 54 UpdateDbVar progressDialog ProgressDialog show SearchActivity this Please wait Retrieving data true true PerformSearchTask task new PerformSearchTask task execute phrase progressDialog setOnCancelListener new CancelTaskOnCancelListener task This is the definition of the PerformSearchTask inside the Activity private class PerformSearchTask extends AsyncTask lt String
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