android - Download Manager crashing when calling from child activity -


i facing head scratching issue , not able resolve. can here help...

i have 1 activity (parent) starts activity(child). , initiating download manager child activity. when clicking button on child activity view downloads, opens download manager , shows downloads. till point goes fine. when return download view window pressing return key, of time crashing (specially when download completed). don't know why..

note: when initiate download manager parent activity, works well. need child. appreciated.

i starting child activity like:

lv.setonitemclicklistener(new adapterview.onitemclicklistener(){ public void onitemclick(adapterview<?> p, view v, int position, long id) {     intent = new intent(audiodownloadactivity.this,cdpageactivity.class);     i.putextra("audiocdurl", "http://bkdrluhar.com/00-htm/" + hiddentext);     i.setflags(intent.flag_activity_new_task);     audiodownloadactivity.this.startactivity(i); }});

in child activity, defining , initiating broadcast receiver download manager like:

private long enqueue; private downloadmanager dm; /*some code */ broadcastreceiver receiver = new broadcastreceiver() {     @override     public void onreceive(context context, intent intent) {         string action = intent.getaction();         if (downloadmanager.action_download_complete.equals(action)) {             query query = new query();             query.setfilterbyid(enqueue);             cursor c = dm.query(query);             if (c.movetofirst()) {                 int columnindex = c.getcolumnindex(downloadmanager.column_status);                 if (downloadmanager.status_successful == c.getint(columnindex)) {                 }             }         }     } }; registerreceiver(receiver, new intentfilter(downloadmanager.action_download_complete));  /*some code */ dm = (downloadmanager) getsystemservice(download_service); request request = new request(uri.parse(downloadurl)); request.setallowednetworktypes(downloadmanager.request.network_wifi | downloadmanager.request.network_mobile)     .setallowedoverroaming(true).settitle("bk asset")     .setdescription(tempfile)     .setdestinationuri(uri.fromfile(new file(mainactivity.downloadfilelocation,tempfile)));         request.setnotificationvisibility(downloadmanager.request.visibility_visible_notify_completed); enqueue = dm.enqueue(request);

and button press pops shows downloads:

public void onaudiocddownloadclick(view v){     intent = new intent();     i.setaction(downloadmanager.action_view_downloads);     startactivity(i);        }

log cat crash is:

fatal exception: main                                                                                                                                                                                              java.lang.runtimeexception: error receiving broadcast intent { act=android.intent.action.download_complete flg=0x10 pkg=com.os.bkdownloader (has extras) } in com.os.bkdownloader.audiodownloadactivity$1@416b8ad8     @ android.app.loadedapk$receiverdispatcher$args.run(loadedapk.java:737)                                                                                                                                           @ android.os.handler.handlecallback(handler.java:605)                                                                                                                                                             @ android.os.handler.dispatchmessage(handler.java:92)                                                                                                                                                             @ android.os.looper.loop(looper.java:137)                                                                                                                                                                         @ android.app.activitythread.main(activitythread.java:4517)                                                                                                                                                       @ java.lang.reflect.method.invokenative(native method)                                                                                                                                                            @ java.lang.reflect.method.invoke(method.java:511)                                                                                                                                                                @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:995)                                                                                                                                 @ com.android.internal.os.zygoteinit.main(zygoteinit.java:762)                                                                                                                                                    @ dalvik.system.nativestart.main(native method)                                                                                                                                                               caused by: java.lang.nullpointerexception                                                                                                                                                                              @ com.os.bkdownloader.audiodownloadactivity$1.onreceive(audiodownloadactivity.java:158)                                                                                                                           @ android.app.loadedapk$receiverdispatcher$args.run(loadedapk.java:728)


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