android - AdRequest Builder cannot be resolved to a type -

i finished developing game android using modified version of framework @ http://www.kilobolt.com/unit-4-android-game-development.html. followed tutorial:https://developers.google.com/mobile-ads-sdk/docs/admob/android/quick-start , added ad not on main activity framework not have .xml file main activity (surface view in pure java code). however, want ads appear on main activity since contains 95% of game. managed add test view (button) on surfaceview using online tutorial when changed button adview got error:

"adrequest.builder cannot resolved type" in

adrequest adrequest = new adrequest.builder().build();.

can tell me cause error? eclipse accepted exact same code in other activity on same project not here. have made necessary imports.

import com.google.ads.adrequest; import com.google.android.gms.ads.adview; 

.

@override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     appcontext = this.getapplicationcontext();     mainlayout = new framelayout(this);     adlayout = new relativelayout(this);      adview = new adview(this);     adview.setadunitid("ca-app-pub-3940256099942544/6300978111"); // google test id     //adrequest adrequest = new adrequest.builder().build();     adview.setadsize(adsize.banner);       relativelayout.layoutparams lp1 = new layoutparams(relativelayout.layoutparams.wrap_content, relativelayout.layoutparams.wrap_content);     relativelayout.layoutparams lp2 = new layoutparams(relativelayout.layoutparams.match_parent, relativelayout.layoutparams.match_parent);     adlayout.setlayoutparams(lp2);     adlayout.addview(adview);     lp1.addrule(relativelayout.align_parent_right, relativelayout.true);       lp1.addrule(relativelayout.align_parent_bottom, relativelayout.true);     adview.setlayoutparams(lp1);       requestwindowfeature(window.feature_no_title);     getwindow().setflags(windowmanager.layoutparams.flag_fullscreen, windowmanager.layoutparams.flag_fullscreen);     getwindow().addflags(windowmanager.layoutparams.flag_keep_screen_on);      boolean isportrait = getresources().getconfiguration().orientation == configuration.orientation_portrait;     int framebufferwidth = isportrait ? 800 : 1280;     int framebufferheight = isportrait ? 1280 : 800;     bitmap framebuffer = bitmap.createbitmap(framebufferwidth, framebufferheight, config.rgb_565);      displaymetrics metrics = new displaymetrics();     getwindowmanager().getdefaultdisplay().getmetrics(metrics);     float scalex = (float) framebufferwidth / metrics.widthpixels;     float scaley = (float) framebufferheight / metrics.heightpixels;      gamescreen.devicewidth = metrics.widthpixels;     gamescreen.deviceheight = metrics.heightpixels;      prefs = this.getsharedpreferences("appprefs", context.mode_private);     prefsexist = prefs.contains("showvalueaddition");     loaddefaultsettings();      renderview = new androidfastrenderview(this, framebuffer);     graphics = new androidgraphics(getassets(), framebuffer);     fileio = new androidfileio(this);     audio = new androidaudio(this);     input = new androidinput(this, renderview, scalex, scaley);     screen = getinitscreen(prefs);      mainlayout.addview(renderview);     mainlayout.addview(adlayout);     setcontentview(mainlayout); } 

any appreciated.

use import com.google.android.gms.ads.adrequest;