cursor - getLoaderManager: in an activity -


i writing app wimmone watch: no orientation changes, small simple screen, , android version 7.

i got first android app running, based on book, had fragment. fragments added complications not want deal with.

my second app has similar structure: list of items select item see or update details. trying read cursor, , create array call "setlistadapter(lstadapter);".

i started with: 

getloadermanager().initloader(0, null, this);

got error:

the method initloader(int, bundle, loadermanager.loadercallbacks) in type loadermanager not applicable arguments (int, null, phonelistactivity)

so tried suggestion:

getloadermanager().initloader(0, null, (android.app.loadermanager.loadercallbacks<d>) this);

got error:

the method initloader(int, bundle, loadermanager.loadercallbacks) type loadermanager refers missing type d

so tried this:

getloadermanager().initloader(0, null, (android.app.loadermanager.loadercallbacks) this);

and got error:

type safety: unchecked invocation initloader(int, null, loadermanager.loadercallbacks) of generic method initloader(int, bundle, loadermanager.loadercallbacks) of type loadermanager

several postings said use version below 11

getsupportloadermanager().initloader(0, null, this);

but gives me error:

the method getsupportloadermanager() undefined type phonelistactivity

i have seen not use "getloadermanager: in activity.

so doing wrong?

  • or how read cursor , create list without creating complexities of fragment?
  • am missing import?

many thanks, clark

below have:

package com.wimmone.phonenos;  import android.view.menu; import android.annotation.targetapi; import android.app.activity; import android.app.listactivity; import android.content.contenturis; import android.content.contentvalues; import android.content.context; import android.content.dialoginterface; import android.content.dialoginterface.ondismisslistener; import android.database.cursor; import android.net.uri; import android.app.application; import android.content.intent; import android.database.cursor; import android.os.build; import android.os.bundle; import android.support.v4.app.listfragment; import android.support.v4.app.loadermanager;  import android.support.v4.app.loadermanager.loadercallbacks; import android.support.v4.content.cursorloader; import android.support.v4.content.loader; import android.support.v4.widget.simplecursoradapter; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.view.onclicklistener;  import android.view.viewgroup; import android.widget.arrayadapter; import android.widget.button; import android.widget.listadapter; import android.widget.listview;   import android.widget.toast;   import android.widget.adapterview; import android.widget.adapterview.onitemselectedlistener;  import java.text.simpledateformat; import java.util.arraylist; import java.util.date; import java.util.list; import java.io.bufferedreader; import java.io.file; import java.io.filereader; import java.io.filewriter; import java.io.ioexception; import android.os.environment; import com.wimm.framework.app.dialog;  public class phonelistactivity extends listactivity                                implements                               loadercallbacks<cursor> {  private simplecursoradapter madapter;  list strrecid = new arraylist();   private listadapter lstadapter;   string strphonegroup = "";  string strphonename = "";  string strphonehome = "";  string strphonecell = "";  string strphonework = "";    private button btn_add;  list strrecord = new arraylist(3);    @override   protected void oncreate(bundle savedinstancestate)     {      super.oncreate(savedinstancestate);      setcontentview(r.layout.phone_list_activity);       string[] stritems = new string[] {phoneprovider.column_phone_name};      int[] icnt = new int[] { r.id.text1 };      madapter = new simplecursoradapter(this, r.layout.phone_row,                 null, stritems, icnt, 0);       log.d("phonenos***", "x oncrt: x02 start");      setlistadapter(madapter);      //getloadermanager().initloader(0, null,  this);      //getloadermanager().initloader(0, null, this);      getsupportloadermanager().initloader(0, null, this);       //-----------------------------------------------      // define add button      button btnadd = (button) findviewbyid(r.id.btn_add);       btnadd.setonclicklistener(new onclicklistener()         {          @override          public void onclick(view v)             {              log.d("phonenos***", "s create view btnaddevent:");             }         }     );         //-----------------------------------------------        // define exit button       button btnexit = (button) findviewbyid(r.id.btn_exit);      btnexit.setonclicklistener(new onclicklistener()         {          @override          public void onclick(view v)             {              log.d("phonenos***", "s create view btnexit:");                  //toast.maketext(this, "good bye",                  //toast.length_short).show();                  // application.onterminate();              finish();             }         }    );       //-----------------------------------------------      // define export button       button btnexport . . .      }     //=============================================================== // data base routines load cursor   @override  public loader<cursor> oncreateloader(int ignored, final bundle args)     {       log.d("eventlst","s loadcsr");       return new cursorloader(this, phoneprovider.content_uri, null,                 null, null, null);          // log.d("phonenos***","x loadcsr");      }    @override  public void onloadfinished(loader<cursor> loader, cursor cursor)     {         // log.d("phonenos***","0 loadfin");       int irecno = 0;      int rowno = 0;      int ibucnt = 0;      string strpath = "";       madapter.swapcursor(cursor);       strrecid.clear();     strrecord.clear();     strrecord.add(0, "mm-dd-yy: event name");     cursor.movetofirst();     log.d("eventlst","1 loadfin do");                // read cursor , add list     while (cursor.isafterlast() == false)        {         irecno = irecno + 1;                   // - table has 4 columns, read them string array: strc         string strc[] = { (cursor.getstring(0)), (cursor.getstring(1)),                           (cursor.getstring(2)), (cursor.getstring(3)),                           (cursor.getstring(4)), (cursor.getstring(5))                         };         string strrowno = (cursor.getstring(0));         strphonegroup = (cursor.getstring(1));         strphonename = (cursor.getstring(2));         strphonehome = (cursor.getstring(3));         strphonecell = (cursor.getstring(4));         strphonework = (cursor.getstring(5));          log.d("phonenos***","4 loadcsr:" + "i:" + irecno + "=" + strrowno + "n:" + strphonename);                     // - concatenate group , name 1 string, add table         strrecord.add(irecno, strphonegroup + "/" + strphonename);                    // - save record number each event in strrecid                   // - records sorted date, need save rowid pass                   //   edit screen         strrecid.add((cursor.getstring(0)));           ibucnt = ibucnt + 1;          cursor.movetonext();        }   // --------------------end of while loop                   //cursor.close();           lstadapter = new arrayadapter<string>(this,                 r.layout.phone_row, r.id.text1, strrecord);              // * call setlistadapter()informs listfragment how fill listview             // * here use arrayadapter          setlistadapter(lstadapter);             // log.d("eventlst","8 loadcsr:" + "alldone");                }      @override     public void onloaderreset(loader<cursor> loader)     // called when last cursor provided onloadfinished() above     // closed     {         // log.d("eventlst","x loadrst");         // initrun remove below         madapter.swapcursor(null);      }  }

since no 1 answered, re-did program , got working. needed use "extends launcheractivity" (for wimmone). since dealing small database on smart watch, loader isn't needed anyway, dropped use of loader , used cursor directly. seems faster.


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