android - How to store the state of the group radio button in a LinearList View -
i have questionnaire in linear layout , radio button group. scroll down linear list , scroll again, selected state of radio button changes default (i.e nothing selected). how can store state of radio button. , heads up, have tried shared preferences method ! doesn't work !! here code :
class mycustomadapter extends baseadapter { vector<string> question; vector<string> answera; vector<string> answerb; vector<string> answerc; vector<string> answerd; mycustomadapter() { question = null; answera = null; answerb = null; answerc = null; answerd = null; } mycustomadapter(vector<string> qs, vector<string> ansa,vector<string> ansb,vector<string> ansc,vector<string> ansd) { question = qs; answera = ansa; answerb = ansb; answerc = ansc; answerd = ansd; // data_image = image; } public int getcount() { return question.size(); } public string getitem(int position) { return null; } public long getitemid(int position) { return position; } public view getview(final int position, view convertview, viewgroup parent) { layoutinflater inflater = getlayoutinflater(); view row=null; row = inflater.inflate(r.layout.accountlist, parent, false); textview tv = (textview) row.findviewbyid(r.id.questiontext); tv.settext(question.get(position).tostring()); system.out.println("--------------------------------------"); rg=(radiogroup)row.findviewbyid(r.id.radio); radiobutton rba=(radiobutton)row.findviewbyid(r.id.radioa); radiobutton rbb=(radiobutton)row.findviewbyid(r.id.radiob); radiobutton rbc=(radiobutton)row.findviewbyid(r.id.radioc); radiobutton rbd=(radiobutton)row.findviewbyid(r.id.radiod); rba.settext(answera.elementat(position)); rbb.settext(answerb.elementat(position)); rbc.settext(answerc.elementat(position)); rbd.settext(answerd.elementat(position)); if(position==1){ rba.setchecked(true); } rg.setoncheckedchangelistener(new radiogroup.oncheckedchangelistener() { @override public void oncheckedchanged(radiogroup group, int checkedid) { radiobutton rb = (radiobutton) group.findviewbyid(checkedid); if(null!=rb && checkedid > -1){ // toast.maketext(contestactivity.this, rb.gettext()+""+position, toast.length_short).show(); system.out.println("*****************************************"); if(position==0){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans1=questionid.elementat(position)+":"+id; }if(position==1){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans2=questionid.elementat(position)+":"+id; }if(position==2){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans3=questionid.elementat(position)+":"+id; }if(position==3){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans4=questionid.elementat(position)+":"+id; }if(position==4){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans5=questionid.elementat(position)+":"+id; }if(position==5){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans6=questionid.elementat(position)+":"+id; }if(position==6){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans7=questionid.elementat(position)+":"+id; }if(position==7){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans8=questionid.elementat(position)+":"+id; }if(position==8){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans9=questionid.elementat(position)+":"+id; }if(position==9){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans10=questionid.elementat(position)+":"+id; }if(position==10){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans11=questionid.elementat(position)+":"+id; }if(position==11){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans12=questionid.elementat(position)+":"+id; }if(position==12){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans13=questionid.elementat(position)+":"+id; }if(position==13){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans14=questionid.elementat(position)+":"+id; }if(position==14){ int index=answervalue.indexof(rb.gettext()); string id=answerid.elementat(index); ans15=questionid.elementat(position)+":"+id; } } } }); return (row); }
you need create 1 array , store state of radio button state.see below code
private boolean[] mychecks = new boolean[question.size()]; private class mycustomadapter extends baseadapter { @override public view getview(final int position, view convertview, viewgroup parent) { ... rg.setchecked(mychecks[position]); rg.setoncheckedchangelistener(new oncheckedchangelistener() { @override public void oncheckedchanged(compoundbutton arg0, boolean arg1) { mychecks[position] = arg1; /// put code///// } }); } 
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