java - Issues with Loading AdMob Ads on App -

i trying have ad banner display on app , seem having issue. anytime go activity, app crashes , mentions when trying load ad, null reference. not positive why though.

here xml adview:

<?xml version="1.0" encoding="utf-8"?> <framelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:ads="http://schemas.android.com/apk/res-auto"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:id="@+id/gamelayout">      <com.google.android.gms.ads.adview         android:id="@+id/bannerad"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="center_horizontal"         ads:adsize="banner"         ads:adunitid="my_adunitid" />  </framelayout> 

here java code using ads:

//load ads adview adview = (adview)findviewbyid(r.id.bannerad); adrequest.builder request = new adrequest.builder(); request.addtestdevice(adrequest.device_id_emulator); adview.loadad(request.build()); 

here logcat:

09-21 21:55:39.300: e/androidruntime(1168): fatal exception: main 09-21 21:55:39.300: e/androidruntime(1168): process: com.project.llb, pid: 1168 09-21 21:55:39.300: e/androidruntime(1168): java.lang.runtimeexception: unable start activity componentinfo{com.twentytwentythree.sab/com.twentytwentythree.sab.rungraphics}: java.lang.nullpointerexception: attempt invoke virtual method 'void com.google.android.gms.ads.adview.loadad(com.google.android.gms.ads.adrequest)' on null object reference 09-21 21:55:39.300: e/androidruntime(1168):     @ android.app.activitythread.performlaunchactivity(activitythread.java:2596) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.app.activitythread.handlelaunchactivity(activitythread.java:2653) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.app.activitythread.access$800(activitythread.java:156) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.app.activitythread$h.handlemessage(activitythread.java:1355) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.os.handler.dispatchmessage(handler.java:102) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.os.looper.loop(looper.java:157) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.app.activitythread.main(activitythread.java:5872) 09-21 21:55:39.300: e/androidruntime(1168):     @ java.lang.reflect.method.invoke(native method) 09-21 21:55:39.300: e/androidruntime(1168):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:852) 09-21 21:55:39.300: e/androidruntime(1168):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:668) 09-21 21:55:39.300: e/androidruntime(1168): caused by: java.lang.nullpointerexception: attempt invoke virtual method 'void com.google.android.gms.ads.adview.loadad(com.google.android.gms.ads.adrequest)' on null object reference 09-21 21:55:39.300: e/androidruntime(1168):     @ com.twentytwentythree.sab.rungraphics.oncreate(rungraphics.java:94) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.app.activity.performcreate(activity.java:5312) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1111) 09-21 21:55:39.300: e/androidruntime(1168):     @ android.app.activitythread.performlaunchactivity(activitythread.java:2552) 09-21 21:55:39.300: e/androidruntime(1168):     ... 9 more 

here code androidmanifest:

<meta-data android:name="com.google.android.gms.version"     android:value="@integer/google_play_services_version" />     <activity         android:name="com.google.android.gms.ads.adactivity"         android:configchanges="keyboard|keyboardhidden|orientation" >     </activity> 

now using addtestdevice method because assume need use since app not on market place yet. have admob account setup , have banner setup way.

please let me know if have ideas. lot.

r.id.bannerad not available in content have set activity/fragment. prior calling:

adview adview = (adview)findviewbyid(r.id.bannerad); 

you must have called

setcontentview(r.layout.mylayoutcontainingbannerad);