android - How to download a file on a click -


how doing ? making application, in application want click listview , application starts download link. have link. used following code but, application crashes:

here listener handle clicks: 

mlistviewmagazine.setonitemclicklistener(new adapterview.onitemclicklistener() {         @override         public void onitemclick(adapterview<?> parent, view view, int position,                                 long id) {             downloadfromurl(mmagazine_title[position]);           }     });

the downloadfromurl function following: 

public void downloadfromurl( string filename) {  //this downloader method     try {         url url = new url("http://themwl.org/web/sites/default/files/584_0.pdf");                 file file = new file(filename);          long starttime = system.currenttimemillis();         log.d("imagemanager", "download begining");         log.d("imagemanager", "download url:" + url);         log.d("imagemanager", "downloaded file name:" + filename);                     /* open connection url. */         urlconnection ucon = url.openconnection();                      /*                      * define inputstreams read urlconnection.                      */         inputstream = ucon.getinputstream();         bufferedinputstream bis = new bufferedinputstream(is);                      /*                      * read bytes buffer until there nothing more read(-1).                      */         bytearraybuffer baf = new bytearraybuffer(50);         int current = 0;         while ((current = bis.read()) != -1) {             baf.append((byte) current);         }                      /* convert bytes read string. */         fileoutputstream fos = new fileoutputstream(file);         fos.write(baf.tobytearray());         fos.close();         log.d("imagemanager", "download ready in"                 + ((system.currenttimemillis() - starttime) / 1000)                 + " sec");      } catch (ioexception e) {         log.d("imagemanager", "error: " + e);     }  }

the error message: 

 06-19 22:32:01.585  12336-12336/alahdal.amjad.mwlapplication e/androidruntime﹕ fatal exception: main process: alahdal.amjad.mwlapplication, pid: 12336 android.os.networkonmainthreadexception         @ android.os.strictmode$androidblockguardpolicy.onnetwork(strictmode.java:1147)         @ java.net.inetaddress.lookuphostbyname(inetaddress.java:418)         @ java.net.inetaddress.getallbynameimpl(inetaddress.java:252)         @ java.net.inetaddress.getallbyname(inetaddress.java:215)         @ com.android.okhttp.hostresolver$1.getallbyname(hostresolver.java:29)         @ com.android.okhttp.internal.http.routeselector.resetnextinetsocketaddress(routeselector.java:232)         @ com.android.okhttp.internal.http.routeselector.next(routeselector.java:124)         @ com.android.okhttp.internal.http.httpengine.connect(httpengine.java:272)         @ com.android.okhttp.internal.http.httpengine.sendrequest(httpengine.java:211)         @ com.android.okhttp.internal.http.httpurlconnectionimpl.execute(httpurlconnectionimpl.java:373)         @ com.android.okhttp.internal.http.httpurlconnectionimpl.getresponse(httpurlconnectionimpl.java:323)         @ com.android.okhttp.internal.http.httpurlconnectionimpl.getinputstream(httpurlconnectionimpl.java:190)         @ alahdal.amjad.mwlapplication.publicationsfragment.downloadfromurl(publicationsfragment.java:98)         @ alahdal.amjad.mwlapplication.publicationsfragment$1.onitemclick(publicationsfragment.java:75)         @ android.widget.adapterview.performitemclick(adapterview.java:300)         @ android.widget.abslistview.performitemclick(abslistview.java:1143)         @ android.widget.abslistview$performclick.run(abslistview.java:3044)         @ android.widget.abslistview$3.run(abslistview.java:3833)         @ android.os.handler.handlecallback(handler.java:739)         @ android.os.handler.dispatchmessage(handler.java:95)         @ android.os.looper.loop(looper.java:135)         @ android.app.activitythread.main(activitythread.java:5221)         @ java.lang.reflect.method.invoke(native method)         @ java.lang.reflect.method.invoke(method.java:372)         @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:899)         @ com.android.internal.os.zygoteinit.main(zygoteinit.java:694)

this solution: 

            downloadmanager.request request = new downloadmanager.request(uri.parse(files_url[position]));             request.settitle("file downloading");             request.setdescription("file being downloaded...");             request.allowscanningbymediascanner();             request.setnotificationvisibility(downloadmanager.request.visibility_visible_notify_completed);             request.setnotificationvisibility(downloadmanager.request.visibility_visible);             string file_name = urlutil.guessfilename(files_url[position],null, mimetypemap.getfileextensionfromurl(files_url[position]));             request.setdestinationinexternalpublicdir(environment.directory_downloads,file_name)  ;             downloadmanager manager = (downloadmanager) getactivity().getsystemservice(context.download_service);             manager.enqueue(request);             toast.maketext(getactivity(),"downloading",toast.length_long).show();

Comments

Post a Comment

Popular posts from this blog

powershell Start-Process exit code -1073741502 when used with Credential from a windows service environment -

i'm running strange behavior powershell start-process call. here call: $process = start-process ` "c:\somepath\mybinary.exe" ` -passthru ` -credential $defaultcredential ` -wait ` -workingdirectory "c:\somepath" ` -loaduserprofile if ($process.exitcode -ne 0) { #do } this call return exit code - 1073741502 . after quick search, exit code seems related generic error when program not load required dll (aka. status_dll_init_failed ). when run without -credential $credential program runs correctly. in order isolate problem, manually launched some.exe in prompt target credential , runs smoothly. so problem seems come way start-process cmdlet launch process. i found potential solutions problem tried apply no luck : link , link . would have idea of what's going on here ? edit 1: run proc mon monitoring program activities when launched directly or via powershell script. problem seems occur when loading kernelbase
Read more

twig - Using Twigbridge in a Laravel 5.1 Package -

i'm trying create laravel 5.1 package uses twigbridge instead of .php views. can normal .php views display fine, when try make use of .twig templates i'm met error. possible use twigbridge templates when creating views laravel package or pretty stuck blade , php ? edit 1: loading twig template without extending works. it's when start using {% extends 'file' %} error comes out. i error error loading /virtual/laravel/packages/username/mypackage/src/views/sample.twig: template "templates.master" not defined () in "/virtual/laravel/packages/username/mypackage/src/views/sample.twig" @ line 1. my folders username |_ mypackage |_ src |_ controllers - samplecontroller.php |_ views |_ templates - master.twig - sample.twig twig template sample.twig {% extends 'templates.master' %} {% block content %} {{ parent()
Read more

c# - LINQ join Entities from HashSet's, Join vs Dictionary vs HashSet performance -

i have hashset's each stores t, have written test application compares different relation algorithms can think of, i'm not pleased results getting. does there exist more efficient ways of achieving object relations, once testing? using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks; using system.diagnostics; namespace linqtests { class program { static void main(string[] args) { hashset<user> usertable = new hashset<user>(); hashset<userproperty> userpropertytable = new hashset<userproperty>(); #region lets create dummy data. console.writeline("please wait while creating dummy data, can take while..."); console.writeline(""); int rows = 1000000; for(int x = 0; x < rows; x++) { random rnd = new random(); // ad
Read more