java - Reset Buttons shows 0 score but doesn't really clean the answers -

i have simple quiz app users can see score scorebutton , reset score resetbutton. questions in radioboxes.the problem when user clicks on resetbutton, button shows 0 doesn't clean radioboxes user had choose start beginning. miss in code can't figure out. appreciated lot!

mainactivity.java

public class mainactivity extends appcompatactivity {      string name;     int score = 0;     button submitbutton;     button resetbutton;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          //user input name          final edittext namefield = (edittext)findviewbyid(r.id.namefield);           name = namefield.gettext().tostring();          //submitbutton shows user score         submitbutton = (button) findviewbyid(r.id.submitbutton);         submitbutton.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 submitbutton.settext("your score is:" + score);             }         });         //resetbutton reset score 0         resetbutton = (button) findviewbyid(r.id.resetbutton);         resetbutton.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 submitbutton.settext((string.valueof(0)));             }         });     }     //this method called when radio buttons clicked     public void onradiobuttonclicked(view view) {          boolean checked = ((radiobutton)view).ischecked();         switch (view.getid()) {             //display toast message right answers             case r.id.firstleftradiobutton:                 if (checked)                     toast.maketext(this, "hooray!your answer right", toast.length_short).show();                 score ++;                 break;             case r.id.secondrightradiobutton:                 if (checked)                     toast.maketext(this, "hooray!your answer right", toast.length_short).show();                 score++;                 break;             case r.id.thirdleftradiobutton:                 if (checked)                     toast.maketext(this, "hooray!your answer right", toast.length_short).show();                 score++;                 break;             case r.id.fourthleftradiobutton:                 if (checked)                     toast.maketext(this, "hooray!your answer right", toast.length_short).show();                 score++;                 break;             case r.id.fifthrightradiobutton:                 if (checked)                     toast.maketext(this, "hooray!your answer right", toast.length_short).show();                 score++;                 break;             case r.id.sixthleftradiobutton:                 if (checked)                     toast.maketext(this, "hooray!your answer right", toast.length_short).show();                 score++;                 break;              //display toast message wrong answers             case r.id.firstrightradiobutton:                 if (checked)                     toast.maketext(this, "sorry, try again!", toast.length_short).show();                 score--;                 break;             case r.id.secondleftradiobutton:                 if (checked)                     toast.maketext(this, "sorry, try again!", toast.length_short).show();                 score--;                 break;             case r.id.thirdrightradiobutton:                 if (checked)                     toast.maketext(this, "sorry, try again!", toast.length_short).show();                 score--;                 break;             case r.id.fourthrightcheckbox:                 if (checked)                     toast.maketext(this, "sorry, try again!", toast.length_short).show();                 score--;                 break;             case r.id.fifthleftradiobutton:                 if (checked)                     toast.maketext(this, "sorry, try again!", toast.length_short).show();                 score--;                 break;             case r.id.sixthrightradiobutton:                 if (checked)                     toast.maketext(this, "sorry, try again!", toast.length_short).show();                 score--;                 break;         }     } 

activity_main.xml

<relativelayout     android:layout_width="match_parent"     android:layout_height="match_parent">      <edittext         android:id="@+id/namefield"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:fontfamily="sans-serif-light"         android:inputtype="text"         android:hint="name"         android:textcolor="#ef6c00"         android:textsize="15sp"/>      <textview         android:id="@+id/welcomemessage"         style="@style/welcomescreentext"         android:fontfamily="sans-serif-light"         android:text="welcome hungry history!\n         let's started!"/>      <textview         android:id="@+id/firstquestion"         style="@style/questionsstyle"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@+id/welcomemessage"         android:paddingleft="5dp"         android:text="who born in ancient city stagira, greece?"/>      <textview         android:id="@+id/secondquestion"         style="@style/questionsstyle"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@+id/firstleftradiobutton"         android:paddingleft="5dp"         android:text="who said in last speech:with malice toward none;...let strive on finish work in;to bind nation's wounds;into care him shall have borne battle , widow , orphans?"/>      <textview         android:id="@+id/thirdquestion"         style="@style/questionsstyle"         android:layout_below="@+id/secondleftradiobutton"         android:paddingleft="5dp"         android:text="where lushan rebellion took place?"/>      <textview         android:id="@+id/fourthquestion"         style="@style/questionsstyle"         android:layout_below="@+id/thirdleftradiobutton"         android:text="who famous exemplar of absolute monarchy in france?"/>      <textview         android:id="@+id/fifthquestion"         style="@style/questionsstyle"         android:layout_below="@+id/fourthleftradiobutton"         android:text="when alexander great lived?"/>      <textview         android:id="@+id/sixthquestion"         style="@style/questionsstyle"         android:layout_below="@+id/fifthleftradiobutton"         android:text="where albert einstein studied?"/>      <textview         android:id="@+id/seventhquestion"         style="@style/questionsstyle"         android:layout_below="@+id/sixthleftradiobutton"         android:text="what main interest of democritus?"/>      <radiogroup         android:id="@+id/firstgroupradiobuttons"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@+id/firstquestion"         android:orientation="horizontal"/>      <radiobutton         android:id="@+id/firstleftradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/firstquestion"         android:text="aristotle"         android:onclick="onradiobuttonclicked"/>      <radiobutton         android:id="@+id/firstrightradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/firstquestion"         android:layout_torightof="@+id/firstleftradiobutton"         android:text="pythagoras"         android:onclick="onradiobuttonclicked"/>      <radiogroup         android:id="@+id/secondgroupradiobuttons"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@id/secondquestion"         android:orientation="horizontal"/>     <radiobutton         android:id="@+id/secondleftradiobutton"         style="@style/radiobuttonstyle"         android:layout_alignparentleft="true"         android:layout_below="@+id/secondquestion"         android:text="william mckinley"         android:onclick="onradiobuttonclicked"/>      <radiobutton         android:id="@+id/secondrightradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/secondquestion"         android:layout_torightof="@+id/secondleftradiobutton"         android:text="abraham lincoln"         android:onclick="onradiobuttonclicked"/>      <radiogroup         android:id="@+id/thirdgroupradiobuttons"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@+id/thirdquestion"         android:orientation="horizontal"/>      <radiobutton         android:id="@+id/thirdleftradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/thirdquestion"         android:text="china"         android:onclick="onradiobuttonclicked"/>      <radiobutton         android:id="@+id/thirdrightradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/thirdquestion"         android:layout_torightof="@+id/thirdleftradiobutton"         android:text="thailand"         android:onclick="onradiobuttonclicked"/>      <radiogroup         android:id="@+id/fourthgroupradiobuttons"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@id/fourthquestion"         android:orientation="horizontal"/>      <radiobutton         android:id="@+id/fourthleftradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/fourthquestion"         android:text="louis xiv"         android:onclick="onradiobuttonclicked"/>      <radiobutton         android:id="@+id/fourthrightcheckbox"         style="@style/radiobuttonstyle"         android:layout_below="@+id/fourthquestion"         android:layout_torightof="@+id/fourthleftradiobutton"         android:text="michael i"         android:onclick="onradiobuttonclicked"/>      <radiogroup         android:id="@+id/fifthgroupradiobuttons"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@id/fifthquestion"         android:orientation="horizontal"/>      <radiobutton         android:id="@+id/fifthleftradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/fifthquestion"         android:text="330-323 bc"         android:onclick="onradiobuttonclicked"/>      <radiobutton         android:id="@+id/fifthrightradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/fifthquestion"         android:layout_torightof="@+id/fifthleftradiobutton"         android:text="336-323 bc"         android:onclick="onradiobuttonclicked"/>      <radiogroup         android:id="@+id/sixthgroupradiobuttons"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@id/sixthquestion"         android:orientation="horizontal"/>      <radiobutton         android:id="@+id/sixthleftradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/sixthquestion"         android:text="university of zurich"         android:onclick="onradiobuttonclicked"/>      <radiobutton         android:id="@+id/sixthrightradiobutton"         style="@style/radiobuttonstyle"         android:layout_below="@+id/sixthquestion"         android:layout_torightof="@+id/sixthleftradiobutton"         android:text="university of germany"         android:onclick="onradiobuttonclicked"/>      <radiogroup         android:id="@+id/seventhgroupradiobuttons"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@id/seventhquestion"         android:orientation="horizontal">          <radiobutton             android:id="@+id/seventhleftradiobutton"             style="@style/radiobuttonstyle"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="mathematics-astronomy"             android:onclick="onradiobuttonclicked"/>          <radiobutton             android:id="@+id/seventhrightradiobutton"             style="@style/radiobuttonstyle"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="philosophy-psychology"             android:onclick="onradiobuttonclicked"/>     </radiogroup>      <textview         android:id="@+id/score"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignparentbottom="true"/>       <button         android:id="@+id/submitbutton"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_below="@+id/seventhgroupradiobuttons"         android:layout_marginbottom="3dp"         android:background="@color/backgroundcolor"         android:text="submit"         android:textcolor="@color/textcolor"         android:onclick="onclick"/>      <button         android:id="@+id/resetbutton"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_below="@+id/submitbutton"         android:layout_marginbottom="3dp"         android:onclick="onclick"         android:background="@color/backgroundresetcolor"         android:textcolor="@color/textcolor"         android:text="reset"         android:textallcaps="true"/>    </relativelayout> 

put

radiogroup.clearcheck(); 

to resetbutton onclick.

this might you.