java - How to save a SparseBooleanArray using SharedPreferences? Or any other alternative? -

java - How to save a SparseBooleanArray using SharedPreferences? Or any other alternative? -

i'd save sparsebooleanarray using either sharedpreferences, or else, that's more preferred.

i've tried using http://stackoverflow.com/a/16711258/2530836, everytime activity created, bundle re-initialized, , bundle.getparcelable() returns null. i'm sure there workaround this, haven't arrived @ despite few hours of brainstorming.

also, if there isn't, utilize sharedpreferences?

here's code:

public class contactactivity extends activity implements adapterview.onitemclicklistener { list<string> name1 = new arraylist<string>(); list<string> phno1 = new arraylist<string>(); arraylist<string> exceptions = new arraylist<string>(); myadapter adapter; button select; bundle bundle = new bundle(); context contactactivitycontext; sharedpreferences prefs; sharedpreferences.editor editor; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.contacts_layout); getallcontacts(this.getcontentresolver()); listview list= (listview) findviewbyid(r.id.lv); adapter = new myadapter(); list.setadapter(adapter); list.setonitemclicklistener(this); list.setitemscanfocus(false); list.settextfilterenabled(true); prefs = preferencemanager.getdefaultsharedpreferences(this); select = (button) findviewbyid(r.id.button1); select.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { stringbuilder checkedcontacts = new stringbuilder(); (int = 0; < name1.size(); i++) { if (adapter.ischecked(i)) { checkedcontacts.append(name1.get(i).tostring()); exceptions.add(name1.get(i).tostring()); checkedcontacts.append(", "); } } checkedcontacts.deletecharat(checkedcontacts.length() - 2); checkedcontacts.append("selected"); editor = prefs.edit(); editor.putint("status_size", exceptions.size()); /* skey array */ for(int i=0;i<exceptions.size();i++) { editor.remove("status_" + i); editor.putstring("status_" + i, exceptions.get(i)); } editor.commit(); toast.maketext(contactactivity.this, checkedcontacts, toast.length_long).show(); } }); } @override public void onitemclick(adapterview<?> arg0, view arg1, int arg2, long arg3) { // todo auto-generated method stub adapter.toggle(arg2); } private void setcontext(context contactactivitycontext){ this.contactactivitycontext = contactactivitycontext; } protected context getcontext(){ homecoming contactactivitycontext; } public void getallcontacts(contentresolver cr) { cursor phones = cr.query(contactscontract.commondatakinds.phone.content_uri, null,null,null, contactscontract.commondatakinds.phone.display_name + " asc" ); while (phones.movetonext()) { string name=phones.getstring(phones.getcolumnindex(contactscontract.commondatakinds.phone.display_name)); string phonenumber = phones.getstring(phones.getcolumnindex(contactscontract.commondatakinds.phone.number)); name1.add(name); phno1.add(phonenumber); } phones.close(); } class myadapter extends baseadapter implements compoundbutton.oncheckedchangelistener { sparsebooleanarray mcheckstates; contactactivity mcontactactivity = new contactactivity(); layoutinflater minflater; textview tv1,tv; checkbox cb; int mpos; myadapter() { mcheckstates = new sparsebooleanarray(name1.size()); mcheckstates = (sparsebooleanarray) bundle.getparcelable("mybooleanarray"); minflater = (layoutinflater) contactactivity.this.getsystemservice(context.layout_inflater_service); } @override public int getcount() { // todo auto-generated method stub homecoming name1.size(); } public void setposition(int p){ mpos = p; } public int getposition(){ homecoming mpos; } @override public object getitem(int position) { // todo auto-generated method stub homecoming position; } @override public long getitemid(int position) { // todo auto-generated method stub homecoming 0; } @override public view getview(final int position, view convertview, viewgroup parent) { // todo auto-generated method stub view vi=convertview; if(convertview==null) vi = minflater.inflate(r.layout.row, null); tv= (textview) vi.findviewbyid(r.id.textview1); tv1= (textview) vi.findviewbyid(r.id.textview2); cb = (checkbox) vi.findviewbyid(r.id.checkbox1); tv.settext("name :"+ name1.get(position)); tv1.settext("phone no :"+ phno1.get(position)); cb.settag(position); cb.setchecked(mcheckstates.get(position, false)); setposition(position); cb.setoncheckedchangelistener(this); homecoming vi; } public boolean ischecked(int position) { homecoming 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); } } @override public void ondestroy(){ bundle.putparcelable("mybooleanarray", new sparsebooleanarrayparcelable(adapter.mcheckstates)); super.ondestroy(); } }

you can store in sharedpreferances thing sparsebooleanarrays is: maps integers boolean values, hence can save string, eliminate braces,spaces , = signs, , have int value (for index value) , corresponding boolean value, separated comma, utilize string accordingly. hope helps :)

java android sharedpreferences