i using check box using stored value in array location when select , deselect check box means clear particular array index value , store check box value @ same location.
public class mainactivity extends activity { int m[] =new int[5]; int count=1; int t=0; checkbox chk1,chk2,chk3,chk4; int flag,increment=0; int b; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); chk1=(checkbox)findviewbyid(r.id.checkbox1); chk2=(checkbox)findviewbyid(r.id.checkbox2); chk3=(checkbox)findviewbyid(r.id.checkbox3); chk4=(checkbox)findviewbyid(r.id.checkbox4); button next=(button)findviewbyid(r.id.next); button previous=(button)findviewbyid(r.id.previous); chk1.setoncheckedchangelistener(new oncheckedchangelistener() { @override public void oncheckedchanged(compoundbutton arg0, boolean ischecked) { // todo auto-generated method stub if(chk1.ischecked()) { flag=1; m[increment]=flag; increment++; count++; } else { increment--; count--; } } }); chk2.setoncheckedchangelistener(new oncheckedchangelistener() { @override public void oncheckedchanged(compoundbutton arg0, boolean ischecked) { // todo auto-generated method stub if(chk2.ischecked()) { flag=2; m[increment]=flag; increment++; count++; } else { increment--; count--; } } }); chk3.setoncheckedchangelistener(new oncheckedchangelistener() { @override public void oncheckedchanged(compoundbutton arg0, boolean ischecked) { // todo auto-generated method stub if(chk3.ischecked()) { flag=3; m[increment]=flag; increment++; count++; } else { increment--; count--; } } }); chk4.setoncheckedchangelistener(new oncheckedchangelistener() { @override public void oncheckedchanged(compoundbutton arg0, boolean ischecked) { // todo auto-generated method stub if(chk1.ischecked()) { flag=4; m[increment]=flag; increment++; count++; } else { increment--; count--; } }}); next.setonclicklistener(new onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub t++; if(t<4) { switch (t) { case 1: b=m[0]; if(b==1) { toast.maketext(getapplicationcontext(), "one", 100).show(); }else if(b==2) { toast.maketext(getapplicationcontext(), "two", 100).show(); }else if(b==3) { toast.maketext(getapplicationcontext(), "three", 100).show(); }else if(b==4) { toast.maketext(getapplicationcontext(), "four", 100).show(); } break; case 2: b=m[1]; if(b==1) { toast.maketext(getapplicationcontext(), "one", 100).show(); }else if(b==2) { toast.maketext(getapplicationcontext(), "two", 100).show(); }else if(b==3) { toast.maketext(getapplicationcontext(), "three", 100).show(); }else if(b==4) { toast.maketext(getapplicationcontext(), "four", 100).show(); } break; case 3: b=m[2]; if(b==1) { toast.maketext(getapplicationcontext(), "one", 100).show(); }else if(b==2) { toast.maketext(getapplicationcontext(), "two", 100).show(); }else if(b==3) { toast.maketext(getapplicationcontext(), "three", 100).show(); }else if(b==4) { toast.maketext(getapplicationcontext(), "four", 100).show(); } break; case 4: b=m[3]; if(b==1) { toast.maketext(getapplicationcontext(), "one", 100).show(); }else if(b==2) { toast.maketext(getapplicationcontext(), "two", 100).show(); }else if(b==3) { toast.maketext(getapplicationcontext(), "three", 100).show(); }else if(b==4) { toast.maketext(getapplicationcontext(), "four", 100).show(); } break; default: if(t<=3) { t=3; } break; } } } }); previous.setonclicklistener(new onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub t--; if(t>=0) { switch (t) { case 1: b=m[0]; if(b==1) { toast.maketext(getapplicationcontext(), "one", 100).show(); }else if(b==2) { toast.maketext(getapplicationcontext(), "two", 100).show(); }else if(b==3) { toast.maketext(getapplicationcontext(), "three", 100).show(); }else if(b==4) { toast.maketext(getapplicationcontext(), "four", 100).show(); } break; case 2: b=m[1]; if(b==1) { toast.maketext(getapplicationcontext(), "one", 100).show(); }else if(b==2) { toast.maketext(getapplicationcontext(), "two", 100).show(); }else if(b==3) { toast.maketext(getapplicationcontext(), "three", 100).show(); }else if(b==4) { toast.maketext(getapplicationcontext(), "four", 100).show(); } break; case 3: b=m[2]; if(b==1) { toast.maketext(getapplicationcontext(), "one", 100).show(); }else if(b==2) { toast.maketext(getapplicationcontext(), "two", 100).show(); }else if(b==3) { toast.maketext(getapplicationcontext(), "three", 100).show(); }else if(b==4) { toast.maketext(getapplicationcontext(), "four", 100).show(); } break; case 4: b=m[3]; if(b==1) { toast.maketext(getapplicationcontext(), "one", 100).show(); }else if(b==2) { toast.maketext(getapplicationcontext(), "two", 100).show(); }else if(b==3) { toast.maketext(getapplicationcontext(), "three", 100).show(); }else if(b==4) { toast.maketext(getapplicationcontext(), "four", 100).show(); } break; default: if(t<=0) { t=1; } break; } } } }); } logcat here
e/androidruntime(1522): fatal exception: main e/androidruntime(1522): java.lang.arrayindexoutofboundsexception: length=5index=-1
i think issue here:
chk4.setoncheckedchangelistener(new oncheckedchangelistener() { @override public void oncheckedchanged(compoundbutton arg0, boolean ischecked) { // todo auto-generated method stub if(chk1.ischecked()) { flag=4; m[increment]=flag; increment++; count++; } else { increment--; count--; } }}); there should chk4 instead of chk1 in if block.
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