sboehnke sboehnke - 7 months ago 51
Java Question

Issues with Loading AdMob Ads on App

I am trying to have an ad banner display on my app and I seem to be having an issue. Anytime I go into the activity, the app crashes and mentions something about that when I am trying to load the ad, that it is a null reference. I am not positive why though.

Here is the xml for the 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 is the java code for using the 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 is the 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 to start activity ComponentInfo{com.twentytwentythree.sab/com.twentytwentythree.sab.runGraphics}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.ads.AdView.loadAd(com.google.android.gms.ads.AdRequest)' on a null object reference
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.app.ActivityThread.access$800(ActivityThread.java:156)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.os.Handler.dispatchMessage(Handler.java:102)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.os.Looper.loop(Looper.java:157)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.app.ActivityThread.main(ActivityThread.java:5872)
09-21 21:55:39.300: E/AndroidRuntime(1168): at java.lang.reflect.Method.invoke(Native Method)
09-21 21:55:39.300: E/AndroidRuntime(1168): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:852)
09-21 21:55:39.300: E/AndroidRuntime(1168): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:668)
09-21 21:55:39.300: E/AndroidRuntime(1168): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.ads.AdView.loadAd(com.google.android.gms.ads.AdRequest)' on a null object reference
09-21 21:55:39.300: E/AndroidRuntime(1168): at com.twentytwentythree.sab.runGraphics.onCreate(runGraphics.java:94)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.app.Activity.performCreate(Activity.java:5312)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
09-21 21:55:39.300: E/AndroidRuntime(1168): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2552)
09-21 21:55:39.300: E/AndroidRuntime(1168): ... 9 more


Here is the code from the 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 I am using the addTestDevice method because I assume that is what I need to use since my app is not on the market place yet. I do have my admob account setup and I have the banner setup that way.

Please let me know if you have any ideas. Thanks a lot.

Answer

R.id.bannerAd is not available in the content you have set for your Activity/Fragment. Prior to calling:

AdView adView = (AdView)findViewById(R.id.bannerAd);

you must have called

setContentView(R.layout.MyLayoutContainingBannerAd);
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