java - The final local variable cannot be assigned, since it is defined in an enclosing type? -
looking able create variable @ end has value time , cost display in textview eventually. running issue ints though.
public class mainactivity extends activity { @override protected void oncreate(bundle savedinstancestate) { // todo auto-generated method stub super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); final int inttime = 30; final int intcost = 10; checkbox cp = (checkbox)findviewbyid(r.id.checkpepperoni); checkbox cs = (checkbox)findviewbyid(r.id.checksausage); checkbox cb = (checkbox)findviewbyid(r.id.checkbacon); checkbox cm = (checkbox)findviewbyid(r.id.checkmushroom); final imageview cheese =(imageview)findviewbyid(r.id.imgcheese); final imageview pepperoni =(imageview)findviewbyid(r.id.imgpepperoni); final imageview sausage =(imageview)findviewbyid(r.id.imgsausage); final imageview bacon =(imageview)findviewbyid(r.id.imgbacon); final imageview mushroom =(imageview)findviewbyid(r.id.imgmushroom); final sharedpreferences sharedpref =preferencemanager.getdefaultsharedpreferences(this); cp.setoncheckedchangelistener(new compoundbutton.oncheckedchangelistener(){ //pepperoni listener @override public void oncheckedchanged(compoundbutton buttonview, boolean ischecked1) { // todo auto-generated method stub if(ischecked1){ pepperoni.setimageresource(r.drawable.pepperoni); inttime = inttime + 6; intcost = intcost + 5; } else{ pepperoni.setimageresource(0); inttime = inttime - 6; intcost = intcost - 5; } }}); cs.setoncheckedchangelistener(new compoundbutton.oncheckedchangelistener(){ //sausage listener @override public void oncheckedchanged(compoundbutton buttonview, boolean ischecked2) { // todo auto-generated method stub if(ischecked2){ sausage.setimageresource(r.drawable.sausage); inttime = inttime + 6; intcost = intcost + 5; } else{ sausage.setimageresource(0); inttime = inttime - 6; intcost = intcost - 5; } }}); cb.setoncheckedchangelistener(new compoundbutton.oncheckedchangelistener(){ @override public void oncheckedchanged(compoundbutton buttonview, boolean ischecked3) { // todo auto-generated method stub if(ischecked3){ bacon.setimageresource(r.drawable.bacon); inttime = inttime + 6; intcost = intcost + 5; } else{ bacon.setimageresource(0); inttime = inttime - 6; intcost = intcost - 5; } }}); cm.setoncheckedchangelistener(new compoundbutton.oncheckedchangelistener(){ @override public void oncheckedchanged(compoundbutton buttonview, boolean ischecked4) { // todo auto-generated method stub if(ischecked4){ mushroom.setimageresource(r.drawable.mushroom); inttime = inttime + 6; intcost = intcost + 5; } else{ mushroom.setimageresource(0); inttime = inttime - 6; intcost = intcost - 5; } }}); imagebutton ib = (imagebutton)findviewbyid(r.id.imgbtngo); ib.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { // todo auto-generated method stub string time = integer.tostring(inttime); string cost = integer.tostring(intcost); sharedpreferences.editor editor = sharedpref.edit(); editor.putstring("keytime", time); editor.putstring("keycost", cost); startactivity(new intent(mainactivity.this, resultactivity.class)); } }); } } the error i'm running is, "the final local variable intcost cannot assigned, since defined in enclosing type."
what mean, , there way i'd able change variable using of checkboxes?
the cause of problem final variables should initialized when declared , cannot reassigned. best bet case create inner field in anonymous class start final variables values, , inner fields updated periodically.
example:
cp.setoncheckedchangelistener(new compoundbutton.oncheckedchangelistener() { //pepperoni listener int innertime = inttime; int innercost = intcost; @override public void oncheckedchanged(compoundbutton buttonview, boolean ischecked1) { if(ischecked1) { pepperoni.setimageresource(r.drawable.pepperoni); innertime += 6; innercost += 5; } else { pepperoni.setimageresource(0); innertime -= 6; innercost -= 5; } } }); more info:
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