android - How to turn on activity-based application into a fragment -

i learn programming mobile applications. decided convert 1 application of activity fragment, have problem. maybe of able me.

package pl.edu.ug.aib.studentizerapp.fragment;      import android.app.fragment;      import android.os.bundle;     import android.text.editable;     import android.text.textwatcher;     import android.view.layoutinflater;     import android.view.view;     import android.view.viewgroup;     import android.widget.arrayadapter;     import android.widget.button;     import android.widget.edittext;     import android.widget.listview;     import android.widget.tabhost;     import android.widget.textview;     import android.widget.toast;      import org.androidannotations.annotations.efragment;      import java.util.arraylist;     import java.util.list;      import pl.edu.ug.aib.studentizerapp.r;     import pl.edu.ug.aib.studentizerapp.todolist.databasehandler;     import pl.edu.ug.aib.studentizerapp.todolist.task;      @efragment(r.layout.fragment_todo)     public class todofragment extends fragment {          edittext zadanietxt, opistxt, datatxt, adrestxt;         list<task> tasks = new arraylist<task>();         listview tasklistview;         databasehandler dbhandler;         @override         public view oncreateview (layoutinflater inflater, viewgroup container, bundle savedinstancestate){             return inflater.inflate(r.layout.fragment_todo, container, false);         }         @override         public void onstart() {             super.onstart();               zadanietxt = (edittext) getview().findviewbyid(r.id.txtzadanie);             opistxt = (edittext) getview().findviewbyid(r.id.txtopis);             datatxt = (edittext) getview().findviewbyid(r.id.txtdata);             adrestxt = (edittext) getview().findviewbyid(r.id.txtadres);             tasklistview = (listview) getview().findviewbyid(r.id.listview);             dbhandler = new databasehandler(getactivity().getapplicationcontext());              tabhost tabhost = (tabhost) getview().findviewbyid(r.id.baner);              tabhost.setup();              tabhost.tabspec tabspec = tabhost.newtabspec("dodaj zadanie");             tabspec.setcontent(r.id.tabzadanie);             tabspec.setindicator("dodaj zadanie");             tabhost.addtab(tabspec);              tabspec = tabhost.newtabspec("lista");             tabspec.setcontent(r.id.tablistazadan);             tabspec.setindicator("lista");             tabhost.addtab(tabspec);              final button addbtn = (button) getview().findviewbyid(r.id.btnadd);             addbtn.setonclicklistener(new view.onclicklistener() {                 @override                 public void onclick(view view) {                     task task = new task(dbhandler.gettaskcount(), string.valueof(zadanietxt.gettext()), string.valueof(opistxt.gettext()), string.valueof(datatxt.gettext()), string.valueof(adrestxt.gettext()));                     if (!taskexists(task)) {                         dbhandler.createzadanie(task);                         tasks.add(task);                         toast.maketext(getactivity().getapplicationcontext(), string.valueof(zadanietxt.gettext()) + " zostało dodane listy zadań!", toast.length_short).show();                         return;                     }                     toast.maketext(getactivity().getapplicationcontext(), string.valueof(zadanietxt.gettext()) + " zadanie już istnieje", toast.length_short).show();                 }             });              zadanietxt.addtextchangedlistener(new textwatcher() {                 @override                 public void beforetextchanged(charsequence charsequence, int i, int i2, int i3) {                  }                  @override                 public void ontextchanged(charsequence charsequence, int i, int i2, int i3) {                     addbtn.setenabled(string.valueof(zadanietxt.gettext()).trim().length() > 0);                 }                  @override                 public void aftertextchanged(editable editable) {                  }             });                if (dbhandler.gettaskcount() != 0)                 tasks.addall(dbhandler.getalltasks());              populatelist();         }          private boolean taskexists(task task) {             string zadanie = task.getzadanie();             int taskcount = tasks.size();              (int = 0; < taskcount; i++) {                 if (zadanie.comparetoignorecase(tasks.get(i).getzadanie()) == 0)                     return true;             }             return false;         }      //    public void onactivityresult(int reqcode, int rescode, intent data) {     //        if (rescode == result_ok) {     //            if (reqcode == 1) {     //                imageuri = data.getdata();     //                contactimageimgview.setimageuri(data.getdata());     //            }     //        }     //    }          private void populatelist() {             arrayadapter<task> adapter = new tasklistadapter();             tasklistview.setadapter(adapter);         }          private class tasklistadapter extends arrayadapter<task> {             public tasklistadapter()             {                  super (todofragment.this, r.layout.listview_item, tasks);             }              @override             public view getview(int position, view view, viewgroup parent) {                 if (view == null)                     view = getactivity().getlayoutinflater().inflate(r.layout.listview_item, parent, false);                  task currenttask = tasks.get(position);                  textview zadanie = (textview) view.findviewbyid(r.id.zadanie);                 zadanie.settext(currenttask.getzadanie());                 textview opis = (textview) view.findviewbyid(r.id.opis);                 opis.settext(currenttask.getopis());                 textview data = (textview) view.findviewbyid(r.id.data);                 data.settext(currenttask.getdata());                 textview adres = (textview) view.findviewbyid(r.id.adres);                 adres.settext(currenttask.getadres());                  return view;             }         }        } 

the problem here:

private class tasklistadapter extends arrayadapter<task> {         public tasklistadapter()         {              super (todofragment.this, r.layout.listview_item, tasks);         } 

what can ?

there message gradle build

information:gradle tasks [:app:assembledebug] :app:prebuild :app:compiledebugndk up-to-date :app:predebugbuild :app:checkdebugmanifest :app:prereleasebuild :app:preparecomandroidsupportappcompatv72000library up-to-date :app:preparecomandroidsupportsupportv42000library up-to-date :app:preparecomfacebookandroidfacebookandroidsdk3211library up-to-date :app:preparecommakeramenroundedimageview150library up-to-date :app:preparedebugdependencies :app:compiledebugaidl up-to-date :app:compiledebugrenderscript up-to-date :app:generatedebugbuildconfig up-to-date :app:generatedebugassets up-to-date :app:mergedebugassets up-to-date :app:generatedebugresvalues up-to-date :app:generatedebugresources up-to-date :app:mergedebugresources :app:processdebugmanifest up-to-date :app:processdebugresources :app:generatedebugsources :app:compiledebugjava note: resolve log file c:\users\kisiel\androidstudioprojects\studentizer\app\build\generated\source\apt\androidannotations.log note: initialize androidannotations 3.2 options {androidmanifestfile=c:\users\kisiel\androidstudioprojects\studentizer\app\build\intermediates\manifests\full\debug\androidmanifest.xml} note: start processing 17 annotations on 32 elements note: androidmanifest.xml file found specified path: c:\users\kisiel\androidstudioprojects\studentizer\app\build\intermediates\manifests\full\debug\androidmanifest.xml note: androidmanifest.xml found: androidmanifest [applicationpackage=pl.edu.ug.aib.studentizerapp, componentqualifiednames=[pl.edu.ug.aib.studentizerapp.draweractivity_, pl.edu.ug.aib.studentizerapp.fragmentactivity_], permissionqualifiednames=[android.permission.internet, android.permission.camera, android.permission.write_external_storage, android.permission.access_fine_location, android.permission.access_coarse_location, android.permission.access_network_state, android.permission.send_sms], applicationclassname=null, libraryproject=false, debugabble=false, minsdkversion=9, maxsdkversion=-1, targetsdkversion=20] note: found project r class: pl.edu.ug.aib.studentizerapp.r note: found android class: android.r note: validating elements note: validating eactivityhandler: [pl.edu.ug.aib.studentizerapp.draweractivity, pl.edu.ug.aib.studentizerapp.fragmentactivity] note: validating efragmenthandler: [pl.edu.ug.aib.studentizerapp.fragment.dashboardfragment, pl.edu.ug.aib.studentizerapp.fragment.timetablefragment, pl.edu.ug.aib.studentizerapp.fragment.todofragment, pl.edu.ug.aib.studentizerapp.fragment.walletfragment] note: validating ebeanhandler: [pl.edu.ug.aib.studentizerapp.navigationdrawer.drawerhandler, pl.edu.ug.aib.studentizerapp.navigationdrawer.drawerlistadapter, pl.edu.ug.aib.studentizerapp.skmtimetable.adapter.trainslistadapter, pl.edu.ug.aib.studentizerapp.skmtimetable.backgroundtasks.restbackgroundtrainleft, pl.edu.ug.aib.studentizerapp.skmtimetable.backgroundtasks.restbackgroundtrainright] note: validating eviewgrouphandler: [pl.edu.ug.aib.studentizerapp.navigationdrawer.draweritemview, pl.edu.ug.aib.studentizerapp.skmtimetable.itemview.trainitemview] note: validating viewbyidhandler: [stanmiasto, stanpogoda, stanc, listtrainleftlstview, listtrainrightlstview, refreshbtn, restoregpsbtn, startidspinner, endidspinner, text, lefttxtview, righttxtview, leftlayout, rightlayout, drawerlayout, drawerlist, icon, name, hour, minute, tip] note: validating clickhandler: [refreshbtnclicked(), restoregpsbtn()] note: validating resthandler: [pl.edu.ug.aib.studentizerapp.dashboard.dashboardrestclient, pl.edu.ug.aib.studentizerapp.skmtimetable.skmrestclient] note: validating gethandler: [gettrains(int,int,int), gettrains(int,int,int)] note: validating optionsitemhandler: [drawertoggleselected(android.view.menuitem)] note: validating restservicehandler: [restclient, restclient] note: validating rootcontexthanlder: [draweractivity, context, context, activity, activity] note: validating nonconfigurationinstancehandler: [restbackgroundtrainleft, restbackgroundtrainright] note: validating beanhandler: [restbackgroundtrainleft, restbackgroundtrainright, drawerhandler, adapterleft, adapterright, drawerlistadapter] note: validating afterinjecthandler: [init()] note: validating afterviewshandler: [init(), init(), init(), init()] note: validating uithreadhandler: [publishresult(pl.edu.ug.aib.studentizerapp.skmtimetable.data.trainslist), publisherror(java.lang.exception), publishwarning(), publishresult(pl.edu.ug.aib.studentizerapp.skmtimetable.data.trainslist), publisherror(java.lang.exception), publishwarning()] note: validating backgroundhandler: [gettrains(int,int,int), gettrains(int,int,int)] note: processing root elements note: processing root elements eactivityhandler: [pl.edu.ug.aib.studentizerapp.fragmentactivity, pl.edu.ug.aib.studentizerapp.draweractivity] note: processing root elements efragmenthandler: [pl.edu.ug.aib.studentizerapp.fragment.walletfragment, pl.edu.ug.aib.studentizerapp.fragment.timetablefragment, pl.edu.ug.aib.studentizerapp.fragment.dashboardfragment, pl.edu.ug.aib.studentizerapp.fragment.todofragment] note: processing root elements ebeanhandler: [pl.edu.ug.aib.studentizerapp.skmtimetable.backgroundtasks.restbackgroundtrainleft, pl.edu.ug.aib.studentizerapp.skmtimetable.backgroundtasks.restbackgroundtrainright, pl.edu.ug.aib.studentizerapp.navigationdrawer.drawerlistadapter, pl.edu.ug.aib.studentizerapp.skmtimetable.adapter.trainslistadapter, pl.edu.ug.aib.studentizerapp.navigationdrawer.drawerhandler] note: processing root elements eviewgrouphandler: [pl.edu.ug.aib.studentizerapp.navigationdrawer.draweritemview, pl.edu.ug.aib.studentizerapp.skmtimetable.itemview.trainitemview] note: processing root elements resthandler: [pl.edu.ug.aib.studentizerapp.skmtimetable.skmrestclient, pl.edu.ug.aib.studentizerapp.dashboard.dashboardrestclient] note: processing enclosed elements note: number of files generated androidannotations: 15 note: writting following api classes in project: [] note: generating class: pl.edu.ug.aib.studentizerapp.skmtimetable.itemview.trainitemview_ note: generating class: pl.edu.ug.aib.studentizerapp.fragment.dashboardfragment_ note: generating class: pl.edu.ug.aib.studentizerapp.fragment.todofragment_ note: generating class: pl.edu.ug.aib.studentizerapp.fragment.timetablefragment_ note: generating class: pl.edu.ug.aib.studentizerapp.fragment.walletfragment_ note: generating class: pl.edu.ug.aib.studentizerapp.skmtimetable.adapter.trainslistadapter_ note: generating class: pl.edu.ug.aib.studentizerapp.skmtimetable.skmrestclient_ note: generating class: pl.edu.ug.aib.studentizerapp.dashboard.dashboardrestclient_ note: generating class: pl.edu.ug.aib.studentizerapp.draweractivity_ note: generating class: pl.edu.ug.aib.studentizerapp.fragmentactivity_ note: generating class: pl.edu.ug.aib.studentizerapp.skmtimetable.backgroundtasks.restbackgroundtrainleft_ note: generating class: pl.edu.ug.aib.studentizerapp.skmtimetable.backgroundtasks.restbackgroundtrainright_ note: generating class: pl.edu.ug.aib.studentizerapp.navigationdrawer.drawerhandler_ note: generating class: pl.edu.ug.aib.studentizerapp.navigationdrawer.draweritemview_ note: generating class: pl.edu.ug.aib.studentizerapp.navigationdrawer.drawerlistadapter_ note: time measurements: [whole processing = 187 ms], [generate sources = 100 ms], [process annotations = 38 ms], [validate annotations = 17 ms], [find r classes = 10 ms], [extract annotations = 9 ms], [extract manifest = 6 ms],  note: finish processing note: start processing 0 annotations on 15 elements note: time measurements: [whole processing = 0 ms],  note: finish processing note: start processing 0 annotations on 0 elements note: time measurements: [whole processing = 1 ms],  note: finish processing c:\users\kisiel\androidstudioprojects\studentizer\app\src\main\java\pl\edu\ug\aib\studentizerapp\navigationdrawer\drawerlistadapter.java error:(36, 19) error: constructor draweritem in class draweritem cannot applied given types; required: int,int,class<? extends fragment> found: string,int,class<todofragment_> reason: actual argument string cannot converted int method invocation conversion note: c:\users\kisiel\androidstudioprojects\studentizer\app\src\main\java\pl\edu\ug\aib\studentizerapp\fragment\timetablefragment.java uses unchecked or unsafe operations. note: recompile -xlint:unchecked details. error:execution failed task ':app:compiledebugjava'. > compilation failed; see compiler error output details. information:build failed information:total time: 5.649 secs information:2 errors information:0 warnings information:see complete output in console 

the super (todofragment.this, r.layout.listview_item, tasks); looking context have todofragment.this (which fragment , not context).

try calling todofragment.this.getactivity() instead of todofragment.this , should set.