Lab# 10: Embedded Applications and Location Tracking Applications

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Department f Infrmatin Technlgy Faculty f Cmputing and Infrmatin Technlgy King Abdulaziz University Mbile Applicatin Develpment CPIT490 Lab# 10: Embedded Applicatins and Lcatin Tracking Applicatins

1 Department f Infrmatin Technlgy Faculty f Cmputing and Infrmatin Technlgy King Abdulaziz University Mbile Applicatin Develpment CPIT490 Lab# 10: Embedded Applicatins and Lcatin Tracking Applicatins Objectives: The bjective f this lab is t develp embedded andrid applicatins and lcatin tracking applicatins. Outline f this lab: 1. Embedded Applicatins 2. Lcatin Management Applicatin Activity Outcmes At the end f this lab, the student will be able t develp an embedded Andrid Applicatins and lcatin management applicatins. Task 1: Steps t develp an embedded andrid applicatin: Step 1. Embedding PDFViewer in the Andrid Prject: Create a new Andrid Prject. Dwnlad the PDFViewer.jar file frm Internet r frm Mdle. Add this file in the Prject s build path (this culd be dne by adding the jar file int the libs flder f the Andrid applicatin). Cpy the fllwing drawable resurces frm PdfViewer/res/drawable int YurPrject/res/drawable flder: left_arrw.png right_arrw.png, zm_in.png, zm_ut.png Cpy the fllwing tw layut resurces frm PdfViewer/res/layut int YurPrject/res/layut flder: dialg_pagenumber.xml, pdf_file_passwrd.xml Step 2. Develping the Java cde: In additin t the Main Activity java class, create an additinal activity class called MyPDFViewerActivity.java by extending PdfViewerActivity. This prgram is given belw. imprt net.sf.andpdf.pdfviewer.pdfvieweractivity; public class MyPdfViewerActivity extends PdfViewerActivity { public int getpreviuspageimageresurce() {return R.drawable.left_arrw; public int getnextpageimageresurce() { return R.drawable.right_arrw; public int getzminimageresurce() {return R.drawable.zm_in; public int getzmoutimageresurce() {return R.drawable.zm_ut; public int getpdfpasswrdlayutresurce() {return R.layut.pdf_file_passwrd; public int getpdfpagenumberresurce() { return R.layut.dialg_pagenumber; public int getpdfpasswrdeditfield() {return R.id.etPasswrd; public int getpdfpasswrdokbuttn() {return R.id.btOK; public int getpdfpasswrdexitbuttn() { return R.id.btExit; public int getpdfpagenumbereditfield() {return R.id.pagenum_edit; Create the Main Activity class as belw. imprt net.sf.andpdf.pdfviewer.pdfvieweractivity; imprt andrid.app.activity; imprt andrid.cntent.intent; imprt andrid.s.bundle; 1

2 imprt andrid.view.menu; public class MainActivity extends Activity public vid ncreate(bundle savedinstancestate) { super.ncreate(savedinstancestate); setcntentview(r.layut.activity_main); // CODE FOR FILE ACCESS COMES HERE refer t step 4 Step 3. Updating the manifest file: a. Yu need t mdify the Manifest file t include bth activities. <applicatin andrid:icn="@drawable/ic_launcher" andrid:label="@string/app_name" andrid:theme="@style/apptheme" > <activity andrid:name=".mainactivity" andrid:label="@string/title_activity_main" > <intent-filter> <actin andrid:name="andrid.intent.actin.main" /> <categry andrid:name="andrid.intent.categry.launcher" /> </intent-filter> </activity> <activity andrid:name="mypdfvieweractivity"></activity> </applicatin> b. If yu want t access the lcal SD Card t play sme vide r audi, yu need t prvide READ_EXTERNAL_STORAGE permissin. <uses-permissin andrid:name="andrid.permissin.read_external_storage"> </uses-permissin> Step 4. Different methds t access PDF files present at different lcatins 1. In rder t access the internal and external strage present in the mbile device r emulatr, varius methds culd be used. The prblem with these methds is that they culd perfrm differently n different emulatrs and devices. Using the fllwing methds in the ncreate() methd f MainActivity class, please identify the directry which is accessed n yur mbile device. Lg.d("TESTING", Envirnment.getExternalStrageDirectry().tString()); // returns /strage/emulated/legacy which is the internal strage Lg.d("TESTING", System.getenv("EXTERNAL_STORAGE").tString()); // returns /strage/extsdcard which is the external strage Lg.d("TESTING", System.getenv("SECONDARY_STORAGE").tString()); 2. Based n the abve, mdify the cde t access the file present in yur internal and external strage. Yu need nly ne f these entries. File file = new File(Envirnment.getExternalStrageDirectry().getPath() +"/test.pdf"); File file = new File("/strage/extSdCard/test.pdf"); 3. Opening the PDF frm the default PDF Viewer. Intent target = new Intent(Intent.ACTION_VIEW); 2

3 target.setdataandtype(uri.frmfile(file),"applicatin/pdf"); target.setflags(intent.flag_activity_no_history); // Intent intent = Intent.createChser(target, "Open File"); 4. Opening the PDF frm the embedded PDF Viewer. Intent intent = new Intent(this, MyPdfViewerActivity.class); // accessing a file present in the SD card // Change the file path and file name accrding t yur file details intent.putextra(pdfvieweractivity.extra_pdffilename,"/strage/sdcard/test.pdf"); Task 2: Develping an andrid applicatin fr lcatin Tracking: In rder t develp Ggle API based andrid applicatins, make sure the fllwing are available: G t SDK Manager in Eclipse: Select the respective Ggle Maps API that matches the andrid versin and install it; if yu want t upgrade yur Andrid API level, yu need t use help Install New Sftware Under Extras, select Ggle Play Services and install it a. Obtain the SHA1 key: i. T btain the SHA1 key, use the fllwing: C:\<jdk-flder>\bin>keytl.exe -list -alias andriddebugkey -keystre C:\<yurHmeFlder>\.andrid\debug.keystre -strepass andrid -keypass andrid v OR ii. Yu culd use the Eclipse t btain the SHA1 key. This is pssible using Windw Preferences Andrid Build b. Obtain the API key: i. Register yur client ID and btain Ggle API key at ii. Yu will need t use yur gmail lgin iii. Under services, enable Ggle Maps Andrid API v2. Yu culd click n Create New Andrid key t generate the key. Yu need yur SHA1 key and the package name fr this. Enter the values f SHA1 key and package name, separated with a semi-cln. iv. Yur new API key will be a 40 character string Nte the API key btain frm the previus step. Als, nte its validity perid. Add the Ggle Play Services prject int yur Eclipse wrkspace. Click File Imprt, select Andrid Existing Andrid Cde int Wrkspace Brwse t and select <andrid-sdk-flder>/extras/ggle/ggle_play_services/libprject/ggle-playservices_lib Yu dn t need t enable the ptin t cpy the library int yur wrkspace In yur new prject file: T add the dependency t Ggle Play Services int yur prject Prject Prperties Andrid Library, Add ggle-play-services_lib Update MainActivity.java t extend FragmentActivity instead f Activity Nte: If there is an errr with regard t a missing library, yu need t right click n the prject and g t Build Path and cnfigure Build Path. In the libraries tab, remve the wrngly added libraries. Add the fllwing tag int yur AndridManifest.xml just befre the clsing </applicatin> tag 3

4 <meta-data andrid:name="cm.ggle.andrid.maps.v2.api_key" andrid:value="yur_api_key"/> Yur applicatin nw als needs the fllwing permissins in the AndridManifest.xml <permissin andrid:name="yur_package_name.permissin.maps_receive" andrid:prtectinlevel="signature"/> <uses-permissin andrid:name="yur_package_name.permissin.maps_receive"/> <uses-permissin andrid:name="andrid.permissin.internet"/> <uses-permissin andrid:name="andrid.permissin.write_external_storage"/> <uses-permissin andrid:name="cm.ggle.andrid.prviders.gsf.permissin.read_gservices"/> Optinally yu can include ne r bth f these permissins t enable aut-lcatin <uses-permissin andrid:name="andrid.permissin.access_coarse_location"/> <uses-permissin andrid:name="andrid.permissin.access_fine_location"/> Maps v2 uses OpenGl s the fllwing uses-feature is als required <uses-feature andrid:glesversin="0x " andrid:required="true"/> The layut file is like this: <?xml versin="1.0" encding="utf-8"?> <fragment xmlns:andrid=" xmlns:map=" andrid:id="@+id/the_map" andrid:layut_width="match_parent" andrid:layut_height="match_parent" andrid:name="cm.ggle.andrid.gms.maps.mapfragment" map:cameratilt="45" map:camerazm="14" /> In rder t run the applicatin n an Andrid device, whse andrid versin is less that andrid versin 12, use <fragment andrid:name="cm.ggle.andrid.gms.maps.supprtmapfragment" /> Instead f <fragment andrid:name="cm.ggle.andrid.gms.maps.mapfragment" /> Make sure Target build is Ggle API. Yu culd check that n Right-click n Prject Preferences Andrid Prject Build Target Yu need t check whether yur prject has ggle-play-services_lib as a library. Ding this prcess includes the ggle-play-services_lib.jar file int Andrid Dependencies fr the current prject. This is pssible nly after imprting the ggle-play-services_lib int Eclipse. Example prgram fr lcatin management: public class MyMapActivity extends FragmentActivity { LcatinClient prtected vid ncreate(bundle savedinstancestate) { super.ncreate(savedinstancestate); setcntentview(r.layut.activity_my_map); GglePlayServicesUtil.isGglePlayServicesAvailable(this); // Get a handle t the Map Fragment GgleMap map = ((SupprtMapFragment) getsupprtfragmentmanager().findfragmentbyid(r.id.the_map)).getmap(); // Map settings // Other supprted types include: MAP_TYPE_NORMAL, // MAP_TYPE_TERRAIN, MAP_TYPE_HYBRID and MAP_TYPE_NONE //map.setmaptype(map.map_type_satellite); map.setmaptype(map.map_type_normal); map.getuisettings().setzmcntrlsenabled(false); // shwfixedlcatin(map); shwcurrentlcatin(map); 4

5 private vid shwfixedlcatin(gglemap map) { LatLng kau = new LatLng( , ); map.setmylcatinenabled(true); map.mvecamera(cameraupdatefactry.newlatlngzm(kau, 13)); map.addmarker(new MarkerOptins().title("KAU").snippet("Our university in Jeddah.") //.icn(bitmapdescriptrfactry.frmresurce(r.drawable.huse_flag)) // Flat markers will rtate when the map is rtated, // and change perspective when the map is tilted. //.flat(true).psitin(kau)); // fr flat(true) CameraPsitin camerapsitin = CameraPsitin.builder().target(kau).zm(13).bearing(90).build(); // Animate the change in camera view ver 2 secnds map.animatecamera(cameraupdatefactry.newcamerapsitin(camerapsitin), 2000, null); // Plylines are useful fr marking paths and rutes n the map. map.addplyline(new PlylineOptins().gedesic(true).add(new LatLng( , 40.35)) // Taif.add(new LatLng( , 39.6)) // Madinah.add(new LatLng( , )) // Makkah.add(new LatLng( , )) // KAU ); private vid shwcurrentlcatin(gglemap map) { LcatinManager service = (LcatinManager) getsystemservice(location_service); blean enabledgps = service.isprviderenabled(lcatinmanager.gps_provider); blean enabledwifi = service.isprviderenabled(lcatinmanager.network_provider); // Check if enabled and if nt send user t the GPS settings // Better slutin wuld be t display a dialg and suggesting t // g t the settings if (!enabledgps) { Tast.makeText(this, "GPS signal nt fund", Tast.LENGTH_LONG).shw(); Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); if (enabledgps) { // service.requestlcatinupdates(lcatinmanager.gps_provider, 0, 0, lcatinlistenergps); // lcatinmanager.requestlcatinupdates( // LcatinManager.GPS_PROVIDER, // MIN_TIME_BW_UPDATES, // MIN_DISTANCE_CHANGE_FOR_UPDATES, this); Lg.d("GPS Enabled", "GPS Enabled"); if (service!= null) { Lcatin lcatin = service.getlastknwnlcatin(lcatinmanager.gps_provider); if (lcatin!= null) { duble latitude = lcatin.getlatitude(); duble lngitude = lcatin.getlngitude(); Tast.makeText(this, "Selected Prvider " + lcatin.getlatitude() + "," + lcatin.getlngitude(), Tast.LENGTH_SHORT).shw(); LcatinManager lcatinmanager = (LcatinManager) getsystemservice(cntext.location_service); // Define the criteria hw t select the lcatin prvider -> use default Criteria criteria = new Criteria(); String prvider = lcatinmanager.getbestprvider(criteria, false); Lcatin lcatin = lcatinmanager.getlastknwnlcatin(prvider); if (lcatin!= null) { Tast.makeText(this, "Selected Prvider " + prvider, Tast.LENGTH_SHORT).shw(); 5

6 // nlcatinchanged(lcatin); LatLng current = new LatLng(lcatin.getLatitude(), lcatin.getlngitude()); map.mvecamera(cameraupdatefactry.newlatlngzm(current, 13)); map.addmarker(new MarkerOptins().psitin(current).title("Current Lcatin")); //.icn(bitmapdescriptrfactry //.frmresurce(r.drawable.ic_launcher))); else { Tast.makeText(this, "GPS Signal is nt available", Tast.LENGTH_SHORT).shw(); Pssible errrs and slutins: NOTE: Ggle Andrid API cdes wrk nly n Andrid device and nt n the emulatr. In the emulatr, yu get nly the grids and n maps. ClassNtFundExceptin: This errr indicates that respective class is nt fund in the apk file. T slve this, yu need t include the ggle-play-services_lib as a library t yur prject. Prgram pens and clses immediately: Happens in the emulatr: There might be prblems with the target SDK versin r there is a mistake in the manifest file Yu need t have yur netwrk cnnectin enabled Happens in the device: Check the minimum and Target SDK versin prvided in the Manifest file alng with that f the mbile device itself. A mismatch in this will cause the prgram t crash Crashing f eclipse is pssible with.metadata/.lg indicating as belw: Plug-in cm.andrid.ide.eclipse.adt was cm.andrid.ide.eclipse.adt.internal.welcme unable t lad class G t.metadata/.plugins flder and rename.metadata/.plugins/rg.eclipse.e4.wrkbench t.metadata/.plugins/rg.eclipse.e4.wrkbench.temp and restart eclipse andrid.view.inflateexceptin: Binary XML file line #2: Errr inflating class fragment Make sure this entry is present in layut file andrid:name="cm.ggle.andrid.gms.maps.supprtmapfragment Make sure t add the belw in manifest file under <applicatin> tag <meta-data andrid:name="cm.ggle.andrid.gms.versin" andrid:value="@integer/ggle_play_services_versin" /> <meta-data andrid:name="cm.ggle.andrid.maps.v2.api_key" andrid:value="api-key" /> Ggle Maps Andrid API v2 nly supprts devices with OpenGL ES 2.0 and abve This errr is pssible if yur emulatr selected des nt supprt OpenGL ES 2.0 and als if the device des nt supprt OpenGL ES 2.0. Library is missing while cmpiling the prgram. Als, imprt andrid.supprt.v4.app.fragmentactivity; has an errr Right click n the prject and chse prperties. Then in Java Build Path, add andridsupprt-v4.jar (ADT-Flder\sdk\extra\andrid\supprt\v4)as an external jar 6

7 Exercises: 1. Using the inbuilt PDF Viewer d the fllwing: a. Open a PDF file present in a Web Server ( b. Open a PDF file present in the assets r raw flder f the apk file. i. Direct access f the files present in the assets r raw flder might nt wrk prperly n all mbile phnes r emulatrs. Thus, yu need t cpy the files int a separate lcatin in the SD card and then access it. ii. Accessing the files present in the raw r assets flder. cpyfile(this.getresurces().penrawresurce(r.raw.test), new FileOutputStream(new File("/strage/extSdCard/", "test1.pdf"))); // fr file in raw flder cpyfile(this.getassets().pen("test.pdf"), new FileOutputStream(new File("/strage/extSdCard/", "test1.pdf"))); // fr file in assets flder // returns /data/data/cm.pdftesting.pdftesting/files flder Lg.d("TESTING",getFilesDir().tString()); private vid cpyfile(inputstream in, OutputStream ut) thrws IOExceptin { byte[] buffer = new byte[1024]; int read; while((read = in.read(buffer))!= -1){ ut.write(buffer, 0, read); c. The fllwing cde is used t list nly the pdf files in a flder and when clicked pen, the respective file will be pened. File images = Envirnment.getExternalStrageDirectry(); imagelist = images.listfiles(new FilenameFilter() { public blean accept(file dir, String name) { return ((name.endswith(".pdf"))); ); pdflist = new String[imagelist.length]; fr (int i = 0; i < imagelist.length; i++) { pdflist[i] = imagelist[i].getname(); this.setlistadapter(new ArrayAdapter<String>(this, andrid.r.layut.simple_list_item_1, pdflist)); prtected vid nlistitemclick(listview l, View v, int psitin, lng id) { super.nlistitemclick(l, v, psitin, id); String path = imagelist[(int) id].getabslutepath(); penpdfintent(path); private vid penpdfintent(string path) { try { final Intent intent = new Intent(this, PdfActivity.class); intent.putextra(pdfvieweractivity.extra_pdffilename, path); catch (Exceptin e) { e.printstacktrace(); References: 7

CS5530 Mobile/Wireless Systems Using Google Map in Android

CS5530 Mobile/Wireless Systems Using Google Map in Android Mbile/Wireless Systems Using Ggle Map in Andrid Yanyan Zhuang Department f Cmputer Science http://www.cs.uccs.edu/~yzhuang UC. Clrad Springs Setup Install the Ggle Play services SDK Tls > Andrid > SDK