android change webview when change a tabstrip -

i wonder if can me work, want change webview url every time change tab in tabstrip

i new developer kind of great.

the main code of pager , tabs

import android.graphics.color; import android.graphics.drawable.colordrawable; import android.graphics.drawable.drawable; import android.graphics.drawable.layerdrawable; import android.graphics.drawable.transitiondrawable; import android.os.bundle; import android.support.v4.app.fragment; import android.support.v4.app.fragmentmanager; import android.support.v4.app.fragmentpageradapter; import android.support.v4.view.viewpager; import android.support.v7.app.actionbaractivity; import android.support.v7.widget.toolbar; import android.util.typedvalue; import android.view.menu; import android.view.menuitem; import android.view.view; import android.widget.toast;  import com.astuetz.pagerslidingtabstrip; import com.readystatesoftware.systembartint.systembartintmanager;  import butterknife.butterknife; import butterknife.injectview;  public class mainactivity extends actionbaractivity {  @injectview(r.id.toolbar) toolbar toolbar; @injectview(r.id.tabs) pagerslidingtabstrip tabs; @injectview(r.id.pager) viewpager pager;  private mypageradapter adapter; private drawable oldbackground = null; private int currentcolor; private systembartintmanager mtintmanager;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     butterknife.inject(this);     setsupportactionbar(toolbar);     // create our manager instance after content view set     mtintmanager = new systembartintmanager(this);     // enable status bar tint     mtintmanager.setstatusbartintenabled(true);     adapter = new mypageradapter(getsupportfragmentmanager());     pager.setadapter(adapter);     tabs.setviewpager(pager);     final int pagemargin = (int) typedvalue.applydimension(typedvalue.complex_unit_dip, 4, getresources()             .getdisplaymetrics());     pager.setpagemargin(pagemargin);     pager.setcurrentitem(1);     changecolor(getresources().getcolor(r.color.green));      tabs.setontabreselectedlistener(new pagerslidingtabstrip.ontabreselectedlistener() {         @override         public void ontabreselected(int position) {             toast.maketext(mainactivity.this, "tab reselected: " + position, toast.length_short).show();         }     }); }  @override public boolean oncreateoptionsmenu(menu menu) {     getmenuinflater().inflate(r.menu.main, menu);     return true; }  @override public boolean onoptionsitemselected(menuitem item) {     switch (item.getitemid()) {         case r.id.action_contact:             quickcontactfragment.newinstance().show(getsupportfragmentmanager(), "quickcontactfragment");             return true;     }     return super.onoptionsitemselected(item); }  private void changecolor(int newcolor) {     tabs.setbackgroundcolor(newcolor);     mtintmanager.settintcolor(newcolor);     // change actionbar color if actionbar available     drawable colordrawable = new colordrawable(newcolor);     drawable bottomdrawable = new colordrawable(getresources().getcolor(android.r.color.transparent));     layerdrawable ld = new layerdrawable(new drawable[]{colordrawable, bottomdrawable});     if (oldbackground == null) {         getsupportactionbar().setbackgrounddrawable(ld);     } else {         transitiondrawable td = new transitiondrawable(new drawable[]{oldbackground, ld});         getsupportactionbar().setbackgrounddrawable(td);         td.starttransition(200);     }      oldbackground = ld;     currentcolor = newcolor; }  public void oncolorclicked(view v) {     int color = color.parsecolor(v.gettag().tostring());     changecolor(color); }  @override protected void onsaveinstancestate(bundle outstate) {     super.onsaveinstancestate(outstate);     outstate.putint("currentcolor", currentcolor); }  @override protected void onrestoreinstancestate(bundle savedinstancestate) {     super.onrestoreinstancestate(savedinstancestate);     currentcolor = savedinstancestate.getint("currentcolor");     changecolor(currentcolor); }  public class mypageradapter extends fragmentpageradapter {      private final string[] titles = {"categories", "home", "top paid", "top free", "top grossing", "top new paid",             "top new free", "trending"};      public mypageradapter(fragmentmanager fm) {         super(fm);     }      @override     public charsequence getpagetitle(int position) {         return titles[position];     }      @override     public int getcount() {         return titles.length;     }      @override     public fragment getitem(int position) {         return superawesomecardfragment.newinstance(position);     } } 

}

and second code of textview want change webview.

import android.os.bundle; import android.support.v4.app.fragment; import android.support.v4.view.viewcompat; import android.util.typedvalue; import android.view.gravity; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.framelayout; import android.widget.framelayout.layoutparams; import android.widget.textview;  import butterknife.butterknife; import butterknife.injectview;  public class superawesomecardfragment extends fragment {  private static final string arg_position = "position";  @injectview(r.id.textview) textview textview;  private int position;  public static superawesomecardfragment newinstance(int position) {     superawesomecardfragment f = new superawesomecardfragment();     bundle b = new bundle();     b.putint(arg_position, position);     f.setarguments(b);     return f; }  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     position = getarguments().getint(arg_position); }  @override public view oncreateview(layoutinflater inflater, viewgroup container,     bundle savedinstancestate) {     view rootview = inflater.inflate(r.layout.fragment_card,container,false);     butterknife.inject(this, rootview);     viewcompat.setelevation(rootview,50);     textview.settext("card "+position);     return rootview; } 

}

that's now, layouts files less important, deal later.

you should setonpagechangelistener , use webview.loadurl(url1);

tabsstrip.setonpagechangelistener(new onpagechangelistener() {      // method invoked when new page becomes selected.     @override     public void onpageselected(int position) {             switch(position)             {             case 0:                 webview.loadurl(url1);                 break;             case 1:                 webview.loadurl(url2);                 break;             case 2:                 webview.loadurl(url3);                 break;                               }     }      // method invoked when current page scrolled     @override     public void onpagescrolled(int position, float positionoffset, int positionoffsetpixels) {         // code goes here     }      // called when scroll state changes:      // scroll_state_idle, scroll_state_dragging, scroll_state_settling     @override     public void onpagescrollstatechanged(int state) {         // code goes here     } });