java - Adding multiple on click listeners for several buttons -

how can make user can have several buttons on click listeners. tried 2 buttons, said had defined on-click listener not make on click listener result. code have far is:

import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.support.v4.app.fragmentactivity; import android.support.v4.app.fragmentmanager; import android.support.v4.app.fragmenttransaction; import android.view.view; import android.widget.linearlayout;  public class mainactivity extends appcompatactivity {      private view btnrender;     private linearlayout container;     private view btnrendered;       @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          btnrender = (view)findviewbyid(r.id.btn_render);         container = (linearlayout)findviewbyid(r.id.fragment_layout);         btnrendered = (view) findviewbyid(r.id.btn_rendered);          //set event handling button         btnrender.setonclicklistener(onclicklistener());     }      private view.onclicklistener onclicklistener() {           return new view.onclicklistener() {             @override             public void onclick(view v) {                 //replace fragment when clicked                 fragmentmanager fm = getsupportfragmentmanager();                 fragmenttransaction ft = fm.begintransaction();                 ft.replace(r.id.fragment_layout, new pdfrenderfragment());                 ft.commit();                  //gone button after                 btnrender.setvisibility(view.gone);                 container.setvisibility(view.visible);             }         };          } } 

the btn_rendered other button want set on click listener for, software not let me this. true need set switch-case method work?

i tried out both codes , none of them seem have doen desired effect. whenever click 1 of buttons, 2nd pdf shows! (what using button for)

you can handle below.

btnrender.setonclicklistener(onclicklistener());  btnrendered.setonclicklistener(onclicklistener());   private view.onclicklistener onclicklistener() {           return new view.onclicklistener() {             @override             public void onclick(view v) {                 switch(v.getid()){                 case r.id.btn_render:                 //replace fragment when clicked                 fragmentmanager fm = getsupportfragmentmanager();                 fragmenttransaction ft = fm.begintransaction();                 ft.replace(r.id.fragment_layout, new pdfrenderfragment());                 ft.commit();                  //gone button after                 btnrender.setvisibility(view.gone);                 container.setvisibility(view.visible);                 break;                  case r.id.btn_rendered:                 // logic here                   break;              }           }         };     }