user interface - Android fragment optimization -

i trying develop master-child page concept using master-detail flow of android comes execution , design vulnerable critics poor performance. please tell me guidelines increase performance besudes loading bitmaps options ?

the below code fragment

import java.util.arraylist; import java.util.list; import com.aaa.demo.asynctask.resubmitorder; import com.aaa.demo.util.*; import android.os.bundle; import android.content.context; import android.database.cursor; import android.support.v4.app.*; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.baseadapter; import android.widget.gridview; import android.widget.imageview;   public class moreactivity extends fragment {         private bundle parameter;      private filemanager fileman;     private salesorderretransmitdbadapter sodbretransmithelper;         public class recordadapter extends baseadapter     {         context context;         private list<string> data;          recordadapter(list<string> data, context context)         {             this.data = data;             this.context = context;         }          public int getcount()         {             return data.size();         }          public object getitem(int position)         {             return data.get(position);         }          public long getitemid(int position)         {             return position;         }          public view getview(final int position, view convertview, viewgroup parent)         {             view v = convertview;              if (v == null)             {                 layoutinflater vi = (layoutinflater) context.getsystemservice(context.layout_inflater_service);                 v = vi.inflate(r.layout.more_item, null);             }              final string item = data.get(position);              imageview imageview = (imageview) v.findviewbyid(r.id.more_item);             imageview.setimagedrawable(fileutil.readimage(context, item + ".png"));             imageview.setonclicklistener(new view.onclicklistener()             {                 public void onclick(view v)                 {                     if(item.equalsignorecase("more_update"))                     {                                            ((activityintab) getactivity()).switchtofragment(new updatecontentactivity());                         runtime.getruntime().gc();                     }                     else if(item.equalsignorecase("more_building"))                     {                                             parameter   = new bundle();                         parameter.putstring("salesid", mainactivity.useridstatic);                         fragment s = new eordersystembuildlist();                         s.setarguments(parameter);                                                                   ((activityintab) getactivity()).switchtofragment(s);                      }                     else if(item.equalsignorecase("more_qc"))                     {                                            parameter   = new bundle();                         parameter.putstring("salesid", mainactivity.useridstatic);                                           fragment s = new eorderlist();                         s.setarguments(parameter);                                                                   ((activityintab) getactivity()).switchtofragment(s);                       }                     else if(item.equalsignorecase("more_password"))                     {                                            parameter   = new bundle();                         parameter.putstring("salesid", mainactivity.useridstatic );                         fragment s = new eorderchangepassword();                         s.setarguments(parameter);                                                                   ((activityintab) getactivity()).switchtofragment(s);                       }                     else if(item.equalsignorecase("more_logout"))                     {                                                                    getactivity().finish();                         runtime.getruntime().gc();                     }                     else if(item.equalsignorecase("more_resubmit"))                     {                                        resubmitorder resubmit = new resubmitorder(getactivity());                         resubmit.execute(mainactivity.useridstatic + "|" +  mainactivity.isfollowup);                      }                    }                            });              return v;         }     }        @override     public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate)     {         final view v = inflater.inflate(r.layout.activity_more, container, false);               arraylist<string> records = new arraylist<string>();         records.add("more_building");         records.add("more_qc");         records.add("more_password");         records.add("more_logout");         records.add("more_update");          fileman = new filemanager();         int count = fileman.loadrecordrecursivecount("sv_recordings","sales_recording");                 log.d("file count " , string.valueof(count));           sodbretransmithelper= new salesorderretransmitdbadapter(getactivity());         sodbretransmithelper.open();         cursor bu = sodbretransmithelper.fetchallunsubmitorder(mainactivity.useridstatic);         bu.movetofirst();         int data = bu.getcount();         log.d("data count " , string.valueof(data));          if(count > 0 || data > 0  ){             records.add("more_resubmit");            }            bu.close();              sodbretransmithelper.close();          gridview gridview = (gridview) v.findviewbyid(r.id.more_gridview);         gridview.setadapter(new recordadapter(records, getactivity()));              return v;     } }