android - Show/Hide two fragments in a single Layout [Both fragments have a Google map each] -

i have activity relative layout; , have 2 different fragments. show 1 fragment , switch next fragment on button click vice verse.

// when button menu clicked  onclicklistener btnclick = new onclicklistener() {      @override     public void onclick(view arg0) {         if(currenttype==0){             initthisfragment(1);         }else{             initthisfragment(0);         }     } };  public void initthisfragment(int type){         fragment newfragment;         if(type==0){             newfragment=new mainfragment();         }else{             newfragment=new journeyfragment();         }         currenttype=type;         fragmenttransaction transaction = getsupportfragmentmanager().begintransaction();         transaction.replace(r.id.abs_fragment_container, newfragment);         transaction.addtobackstack(null);         transaction.commit();     } 

r.id.abs_fragment_container relative layout

both fragment contain google maps inside them;

but not working expected.

• by default add first fragment [which works fine].
• then after onclick event 2nd fragment comes[which works fine]
• but on next click app crashes;

please new google maps , fragments;

yeah of course app crashes because fragment map exists @ thread helped me lot: duplicate id, tag null, or parent id fragment com.google.android.gms.maps.mapfragment

especially second answer 41 ups easy understand

and yes have posted 1 in comment if have enough reputation it!