问题
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...
回答1:
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.
回答2:
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!
来源：https://stackoverflow.com/questions/9815505/classnotfound-when-trying-to-implement-admob-banner