android - Class must either be declared abstract or implement abstract method? -
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it loos i'm doing right here must missing something. hoping explanation why i'm getting error in first line of code , should fix type of problem? i'm new android dev.
public class page2 extends appcompatactivity implements onclicklistener { /** * attention: auto-generated implement app indexing api. * see https://g.co/appindexing/androidstudio more information. */ private googleapiclient client; imagebutton rock, scissors, paper; random randomnum = new random(); int cpumov; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activitypage2); //set xml page style display rock = (imagebutton) findviewbyid(r.id.imagebuttonrock); scissors = (imagebutton) findviewbyid(r.id.imagebuttonscissors); paper = (imagebutton) findviewbyid(r.id.imagebuttonpaper); rock.setonclicklistener(new onclicklistener() { // calling onclick() method @override //method handling happens when click rock buttonimage. public void onclick(view v) { // number between 1-3 inclusive (max-min+1)+1 cpumov = randomnum.nextint(3 - 1 + 1) + 1; buildalert(cpumov, "imagebuttonrock"); moveviewtoscreencenter(v);//float center } }); scissors.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { // number between 1-3 inclusive (max-min+1)+1 cpumov = randomnum.nextint(3 - 1 + 1) + 1; buildalert(cpumov, "imagebuttonscissors"); moveviewtoscreencenter(v);//float center } }); paper.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { // number between 1-3 inclusive (max-min+1)+1 cpumov = randomnum.nextint(3 - 1 + 1) + 1; buildalert(cpumov, "imagebuttonpaper"); moveviewtoscreencenter(v);//float center } }); } //eooncreate private void moveviewtoscreencenter( view view ) { relativelayout root = (relativelayout) findviewbyid( r.id.rootlayout ); displaymetrics dm = new displaymetrics(); this.getwindowmanager().getdefaultdisplay().getmetrics( dm ); int statusbaroffset = dm.heightpixels - root.getmeasuredheight(); int originalpos[] = new int[2]; view.getlocationonscreen( originalpos ); int xdest = dm.widthpixels/2; xdest -= (view.getmeasuredwidth()/2); int ydest = dm.heightpixels/2 - (view.getmeasuredheight()/2) - statusbaroffset; translateanimation anim = new translateanimation( 0, xdest - originalpos[0] , 0, ydest - originalpos[1] ); anim.setduration(5000); // speed of movement anim.setfillafter( true ); view.startanimation(anim); } //builds message displayed void appendmessage(alertdialog.builder myalert, string cpumove, string result) { myalert.setmessage("computer selects " +cpumove+ ", " +result+ "!"); myalert.show(); myalert.setcancelable(true); //how give id alertdialog save in strings.xml } public void buildalert(int move, string btnpressed) { alertdialog.builder myalert = new alertdialog.builder(this); string cpumove; string result; if (btnpressed.equals("imagebuttonrock")) { //toast.maketext(this, "hooray "+move, toast.length_short).show(); if (move == 1) { cpumove = "rock"; result = "tied"; //call appendmessage append vars , display message appendmessage(myalert, cpumove, result); } if (move == 2) { cpumove = "scissors"; result = "won"; //call appendmessage append vars , display message appendmessage(myalert,cpumove,result); } if (move == 3) { cpumove = "paper"; result = "lost"; //call appendmessage append vars , display message appendmessage(myalert,cpumove,result); } } else if (btnpressed.equals("imagebuttonscissors")) { if (move == 1) { cpumove = "rock"; result = "lost"; //call appendmessage append vars , display message appendmessage(myalert,cpumove,result); } if (move == 2) { cpumove = "scissors"; result = "tied"; //call appendmessage append vars , display message appendmessage(myalert, cpumove, result); } if (move == 3) { cpumove = "paper"; result = "won"; //call appendmessage append vars , display message appendmessage(myalert,cpumove,result); } } else { //imagebutton scissors if (move == 1) { cpumove = "rock"; result = "won"; //call appendmessage append vars , display message appendmessage(myalert,cpumove,result); } if (move == 2) { cpumove = "scissors"; result = "lost"; //call appendmessage append vars , display message appendmessage(myalert,cpumove,result); } if (move == 3) { cpumove = "paper"; result = "tied"; //call appendmessage append vars , display message appendmessage(myalert,cpumove,result); } } } @override public void onstart() { super.onstart(); // attention: auto-generated implement app indexing api. // see https://g.co/appindexing/androidstudio more information. client.connect(); action viewaction = action.newaction( action.type_view, // todo: choose action type. "page2 page", // todo: define title content shown. // todo: if have web page content matches app activity's content, // make sure auto-generated web page url correct. // otherwise, set url null. uri.parse("http://host/path"), // todo: make sure auto-generated app deep link uri correct. uri.parse("android-app://rps.rsp/http/host/path") ); appindex.appindexapi.start(client, viewaction); } @override public void onstop() { super.onstop(); // attention: auto-generated implement app indexing api. // see https://g.co/appindexing/androidstudio more information. action viewaction = action.newaction( action.type_view, // todo: choose action type. "page2 page", // todo: define title content shown. // todo: if have web page content matches app activity's content, // make sure auto-generated web page url correct. // otherwise, set url null. uri.parse("http://host/path"), // todo: make sure auto-generated app deep link uri correct. uri.parse("android-app://rps.rsp/http/host/path") ); appindex.appindexapi.end(client, viewaction); client.disconnect(); } }
i know view.onclicklistener must implement function onclick(). not doing that?
you need implement unimplemented methods interface you're implementing. in case interface onclicklistener , needs have method:
public abstract void onclick (view v)
either remove interface or implement method. can placing cursor on onclicklistener , pressing alt+enter if you're using android studio , it'll give options on how fix error.
as can see in code, you've given buttons proper onclicklisteners solution might delete implements onclicklistener since you're not using it.
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