android - Unable to download .jpg image and set into imageview using asynctask -

-


have problem. can't seem download .jpg image url source , set imageview inside listview. gives me error "nullpointerexception". using imagedownloader class here.

this lines of code download image files:
oncreate()...

        (int = 0; < listdata.size(); i++) {             imageisbn = listdata.get(i).get("coverimage");             string isbnurl = "http://lib.syndetics.com/index.aspx?isbn=" + imageisbn +                                     "/sc.gif&client=tpoly&type=xw12";             imageview iv = (imageview) findviewbyid(r.id.cover_image);             imagedownloader.download(isbnurl,iv);         }

i'm thinking maybe due setcontentview(r.layout.list) that's producing error since listview , imageview link in xml file.

below logcat:

05-11 09:26:58.063: error/androidruntime(305): java.lang.runtimeexception: unable start activity componentinfo{com.tplibrary/com.tplibrary.search.searchresults}: java.lang.nullpointerexception 05-11 09:26:58.063: error/androidruntime(305): @ android.app.activitythread.performlaunchactivity(activitythread.java:2663) 05-11 09:26:58.063: error/androidruntime(305): @ android.app.activitythread.handlelaunchactivity(activitythread.java:2679) 05-11 09:26:58.063: error/androidruntime(305): @ android.app.activitythread.access$2300(activitythread.java:125) 05-11 09:26:58.063: error/androidruntime(305): @ android.app.activitythread$h.handlemessage(activitythread.java:2033) 05-11 09:26:58.063: error/androidruntime(305): @ android.os.handler.dispatchmessage(handler.java:99) 05-11 09:26:58.063: error/androidruntime(305): @ android.os.looper.loop(looper.java:123) 05-11 09:26:58.063: error/androidruntime(305): @ android.app.activitythread.main(activitythread.java:4627) 05-11 09:26:58.063: error/androidruntime(305): @ java.lang.reflect.method.invokenative(native method) 05-11 09:26:58.063: error/androidruntime(305): @ java.lang.reflect.method.invoke(method.java:521) 05-11 09:26:58.063: error/androidruntime(305): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:868) 05-11 09:26:58.063: error/androidruntime(305): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:626) 05-11 09:26:58.063: error/androidruntime(305): @ dalvik.system.nativestart.main(native method) 05-11 09:26:58.063: error/androidruntime(305): caused by: java.lang.nullpointerexception 05-11 09:26:58.063: error/androidruntime(305): @ com.tplibrary.search.imagedownloader.forcedownload(imagedownloader.java:80) 05-11 09:26:58.063: error/androidruntime(305): @ com.tplibrary.search.imagedownloader.download(imagedownloader.java:49) 05-11 09:26:58.063: error/androidruntime(305): @ com.tplibrary.search.searchresults.oncreate(searchresults.java:185) 05-11 09:26:58.063: error/androidruntime(305): @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1047) 05-11 09:26:58.063: error/androidruntime(305): @ android.app.activitythread.performlaunchactivity(activitythread.java:2627) 05-11 09:26:58.063: error/androidruntime(305): ... 11 more

so guys, ideas? i'm using imagedownloader class wrongly?

in imagedownloader class, mode assigned no_async_task:

public enum mode { no_async_task, no_downloaded_drawable, correct } private mode mode = mode.no_async_task;

your intention download image. try setting mode variable no_downloaded_drawable.


Comments

Post a Comment

Popular posts from this blog

Cursor error with postgresql, pgpool and php -

-
hey, struggling bit determine exact cause of error has been popping in our release environment. there not seem dealing particular error on google. this error message getting: sqlstate[34000]: invalid cursor name: 7 error: portal "" not exist the error pops when using pdo prepared statements. this setup our release environment: pgpool 3.0.1 (the postgresql backend in streaming replication mode!) php 5.3.5 postgresql 9.0 edit: architecture 64bit. the same error not manifest in our test environment (edit: forgot mention, standard test environment uses postgresql 9.0 without pgpool). thus, led suspect pgpool @ least partly suspect. does know probable causes error are? edit: ok, here example of kind of code causes error. $sql = 'select * '; $sql .= 'from "mytable" "mystuff" '; $sql .= 'where "mytable"."status" = 1 '; $sql .= 'and "mytable"."mytableid" = :table...
Read more

delphi - ESC/P programming! -

-
why need use because printers using tprinter prints weird hieroglyph @ beginning of printable area. my problem if send commands, nothing happens. esc e (#27 #69) - sending escape sequence didn't work expected. removed first letter , rest of string made bold. eg. hello -> ello . after changed esc e esc (#27 #69 #27), worked fine. example managed figure out, but... trying select character table "esc t n" (#27 #116 n), make "õäöü" work. command doesn't work. nothing happens! , command supported esc/p, esc/p 2 , 9-pin esc/p, should work fine. manual can found here . if has ever needed use esc/p commands maybe 1 can shed light how work them! thanks in advance! edit: in previous post asked more or less same question though answers how did send commands printer. (i'll change question there according answers!) i accepted ken's answer, because claimed way transferred commands wasn't best , got work escape command. problem after t...
Read more

c++ - error: use of deleted function -

-
i've been working on c++ code friend has written , following error have never seen before when compiling gcc4.6: error: use of deleted function ‘gamefsm_<std::array<c, 2ul> >::hdealt::hdealt()’ implicitly deleted because default definition ill-formed: uninitialized non-static const member ‘const h_t floppokergamefsm_<std::array<c, 2ul> >::hdealt::h’ edit: comes part of code using boost msm: boost webpage edit2: there no = delete() used anywhere in sourcecode. generally speaking, error mean? should looking when type of error occurs? i don't think other answers mentioning =deleted; syntax correct. error message says default constructor has been deleted implicitly . says why: class contains non-static, const variable, not initialized default ctor. class x { const int x; }; since x::x const , must initialized -- default ctor wouldn't initialize (because it's pod type). therefore, default ctor, need define 1 (and must ...
Read more