java - Saving checkbox state for dynamically created checkboxes in Android -

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• easy way save values through many appstarts? 1 answer

i have created listview consists of application installed on device. when installed applications displayed user, each application have corresponding checkbox. user clicks on multiple checkboxes , corresponding application names saved.

what want is, when user again starts application, checkboxes of applications saved user should checked.

how can ? can me? in advance.

here code

applist.java

public class applist extends activity { appinfoadapter adapter ; appinfo app_info[] ;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_app_list);     final listview listapplication = (listview)findviewbyid(r.id.listapplication);     final button b= (button) findviewbyid(r.id.button001);     final context context = null;     b.setonclicklistener(new onclicklistener()     {          @override         public void onclick(view v) {             // todo auto-generated method stub              stringbuilder result = new stringbuilder();             for(int i=0;i<app_info.length;i++)             {                 if(adapter.mcheckstates.get(i)==true)                 {                                     result.append(app_info[i].applicationname).append(",");                    // result.append(",");                 }              }              string playlists = result.tostring();             storingclas.writeapps(applist.this, playlists);             //string[] po = playlists.split(",");             //b.settext(po[2]+"o");          }      });      applicationinfo applicationinfo = getapplicationinfo();     packagemanager pm = getpackagemanager();     list<packageinfo> pinfo = new arraylist<packageinfo>();     pinfo.addall(pm.getinstalledpackages(0));     app_info = new appinfo[pinfo.size()];      int counter = 0;     for(packageinfo item: pinfo){         try{              applicationinfo = pm.getapplicationinfo(item.packagename, 1);                       app_info[counter] = new appinfo(pm.getapplicationicon(applicationinfo),                               string.valueof(pm.getapplicationlabel(applicationinfo)));               system.out.println(counter);          }         catch(exception e){              system.out.println(e.getmessage());         }          counter++;     }     adapter = new appinfoadapter(this, r.layout.item_row, app_info);     listapplication.setadapter(adapter);  }} 

appinfoadapter.java

public class appinfoadapter extends arrayadapter<appinfo> implements compoundbutton.oncheckedchangelistener {  sparsebooleanarray mcheckstates;   context context; int layoutresourceid; appinfo  data[] = null;  public appinfoadapter(context context, int layoutresourceid, appinfo[] data){     super(context, layoutresourceid,data);     this.layoutresourceid = layoutresourceid;     this.context = context;     this.data = data;     mcheckstates = new sparsebooleanarray(data.length); }  @override public view getview(int position, view convertview, viewgroup parent){      view row = convertview;     appinfoholder holder= null;      if (row == null){         layoutinflater inflater = layoutinflater.from(context);         row = inflater.inflate(layoutresourceid, parent, false);          holder = new appinfoholder();          holder.imgicon = (imageview) row.findviewbyid(r.id.imageview1);         holder.txttitle = (textview) row.findviewbyid(r.id.textview001);         holder.chkselect = (checkbox) row.findviewbyid(r.id.checkbox1);          row.settag(holder);      }     else{         holder = (appinfoholder)row.gettag();     }       appinfo appinfo = data[position];     holder.txttitle.settext(appinfo.applicationname);     holder.imgicon.setimagedrawable(appinfo.icon);    // holder.chkselect.setchecked(true);    // data[2].applicationname="kj";   /*   string mm=storingclas.readapps(context);    string[] po= mm.split(",");     for(int k=0;k<po.length;k++){         for(int j=0;j<data.length;j++){         if(po[k].contains(data[j].applicationname))         {             holder.chkselect.setchecked(mcheckstates.get(position, true));         }      }}*/        holder.chkselect.settag(position);     holder.chkselect.setchecked(mcheckstates.get(position, false));     holder.chkselect.setoncheckedchangelistener(this);     return row;  } public boolean ischecked(int position) {     return mcheckstates.get(position, false); }  public void setchecked(int position, boolean ischecked) {     mcheckstates.put(position, ischecked);  }  public void toggle(int position) {     setchecked(position, !ischecked(position));  } @override public void oncheckedchanged(compoundbutton buttonview,         boolean ischecked) {       mcheckstates.put((integer) buttonview.gettag(), ischecked);      } static class appinfoholder {     imageview imgicon;     textview txttitle;     checkbox chkselect;}} 

appinfo.java

public class appinfo { public drawable icon; public string applicationname;  public appinfo(){     super(); }  public appinfo(drawable icon, string applicationname){     super();     this.icon = icon;     this.applicationname = applicationname; }} 

there plenty of ways in android save information between app launches. android website provides great overview of different built-in ways: saving data

once choose way save, sharedpreference or database, when app launched, can check saved information , display user.