ClassNotFound when trying to implement AdMob banner

Question

I am getting a very annoying ClassNotFound exception when trying to implement an admob banner in my android app, using admob sdk 4.3.1. I have used the following implementation:

Manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.xxx"
    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10"

        />
....
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

     <activity android:name="com.google.ads.AdActivity"
    android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>

main.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"

    android:id="@+id/bigmainlayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:background="@color/grey">
 <com.google.ads.AdView android:id="@+id/adView"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         ads:adUnitId="xxxx"
                         ads:adSize="BANNER"
                         ads:testDevices="TEST_EMULATOR"
                         ads:loadAdOnCreate="true"/>
</LinearLayout>

Project.properties

target=android-14

Error:

03-21 22:00:25.993: E/AndroidRuntime(333): FATAL EXCEPTION: main 03-21 22:00:25.993: E/AndroidRuntime(333): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxxx/com.xxxx.MainActivity}: android.view.InflateException: Binary XML file line #125: Error inflating class com.google.ads.AdView 03-21 22:00:25.993: E/AndroidRuntime(333): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.os.Handler.dispatchMessage(Handler.java:99) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.os.Looper.loop(Looper.java:123) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.app.ActivityThread.main(ActivityThread.java:3683) 03-21 22:00:25.993: E/AndroidRuntime(333): at java.lang.reflect.Method.invokeNative(Native Method) 03-21 22:00:25.993: E/AndroidRuntime(333): at java.lang.reflect.Method.invoke(Method.java:507) 03-21 22:00:25.993: E/AndroidRuntime(333): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 03-21 22:00:25.993: E/AndroidRuntime(333): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 03-21 22:00:25.993: E/AndroidRuntime(333): at dalvik.system.NativeStart.main(Native Method) 03-21 22:00:25.993: E/AndroidRuntime(333): Caused by: android.view.InflateException: Binary XML file line #125: Error inflating class com.google.ads.AdView 03-21 22:00:25.993: E/AndroidRuntime(333): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:581) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.view.LayoutInflater.rInflate(LayoutInflater.java:623) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.view.LayoutInflater.inflate(LayoutInflater.java:408) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 03-21 22:00:25.993: E/AndroidRuntime(333): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.app.Activity.setContentView(Activity.java:1657) 03-21 22:00:25.993: E/AndroidRuntime(333): at com.xxxx.MainActivity.onCreate(FreeMedsActivity.java:55) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 03-21 22:00:25.993: E/AndroidRuntime(333): ... 11 more 03-21 22:00:25.993: E/AndroidRuntime(333): Caused by: java.lang.ClassNotFoundException: com.google.ads.AdView in loader dalvik.system.PathClassLoader[/data/app/com.xxxx-2.apk] 03-21 22:00:25.993: E/AndroidRuntime(333): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240) 03-21 22:00:25.993: E/AndroidRuntime(333): at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 03-21 22:00:25.993: E/AndroidRuntime(333): at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.view.LayoutInflater.createView(LayoutInflater.java:471) 03-21 22:00:25.993: E/AndroidRuntime(333): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570

)

I get a similar classnotfound exception when creating the adview in code and adding it to the layout. I get this error on OS 2.2, 2.3.3, 2.3.7, and 4.0. I have added the admobsdk.jar to the build path. I have tried switching the minSSdkVersion to 14. I am using eclipse indigo.

I am wondering if this has to do with how I am adding the .jar. I have it copied into a /lib folder in the project, and then either do add to build path or preferences-->build path-->add JAR. I am wondering if somehow the app doesn't know where to find the .jar still...

Did you try doing add external jar under configure build path? — Benoir, Mar 22 '12 at 02:53
@nguyendat: I am building the app for the emulator, so I believe that the code is non-obfuscated so proguard "shouldn't" be an issue, unless you know something I don't — benbeel, Mar 22 '12 at 03:09
Check your referenced libraries. Is the Google AdMOb SDK jar in there with the com.googe.ads.AdView.class? Tbh, if the SDK wasn't properly included, I wouldn't think the code version would even compile. — Eric Leichtenschlag, Mar 22 '12 at 17:02

score 15 · Accepted Answer · answered Mar 22 '12 at 18:28

15

Turns out r17 of Android Tools requires the /lib folder to be /libs, and the SDK has to be placed in there and referenced internally in order for it to be included in the apk.

Check out this link for more information.

answered Mar 22 '12 at 18:28

Eric Leichtenschlag

8,881
1
28
28

You sir are incredible. Why would they change the folder naming?! – benbeel Mar 22 '12 at 21:44
3

That I'm not sure of. What's more disappointing is the fact that you need a libs/ folder at all. For me it's ideal to have a libraries/ folder that all of my projects could reference, instead of needing a copy of the AdMob SDK jar for every project I write. – Eric Leichtenschlag Mar 22 '12 at 22:48

score 6 · Answer 2 · answered Jul 26 '12 at 08:42

6

I have same problem I was fix it in Eclipse by Project -> Clean Project -> propertise -> Java build path -> Order and Export (Check googleAdmod jar) Hope this help!

answered Jul 26 '12 at 08:42

manhhoangxuan

111
1
4

Worked for me too. I had an existing project that I added Action Bar Sherlock too and I was getting this error. – Gerald Jan 16 '13 at 10:48

ClassNotFound when trying to implement AdMob banner

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