虽然这个问题被问了很多次，但没有一个解决方案适合我。我正在使用Google Play服务库在我的应用中投放广告。 我已经在menifest文件中声明了它，根据Google文档，一切都是正确的，但我仍然得到这个错误。 我在布局文件中声明了这样的adView：
<com.google.android.gms.ads.AdView
android:layout_width="480dp"
android:layout_height="70dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:gravity="bottom"
ads:adSize="BANNER"
ads:adUnitId="a1514181aaf0886"
ads:loadAdOnCreate="true"
ads:testDevices="TEST_EMULATOR"/>
Logcat如下
08-26 13:35:06.346: E/AndroidRuntime(9190): FATAL EXCEPTION: main
08-26 13:35:06.346: E/AndroidRuntime(9190): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.pucit.newgame/com.pucit.newgame.newgame}: android.view.InflateException: Binary XML file line #20: Error inflating class com.google.android.gms.ads.AdView
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2255)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2309)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.ActivityThread.access$700(ActivityThread.java:157)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1289)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.os.Handler.dispatchMessage(Handler.java:99)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.os.Looper.loop(Looper.java:176)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.ActivityThread.main(ActivityThread.java:5319)
08-26 13:35:06.346: E/AndroidRuntime(9190): at java.lang.reflect.Method.invokeNative(Native Method)
08-26 13:35:06.346: E/AndroidRuntime(9190): at java.lang.reflect.Method.invoke(Method.java:511)
08-26 13:35:06.346: E/AndroidRuntime(9190): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
08-26 13:35:06.346: E/AndroidRuntime(9190): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
08-26 13:35:06.346: E/AndroidRuntime(9190): at dalvik.system.NativeStart.main(Native Method)
08-26 13:35:06.346: E/AndroidRuntime(9190): Caused by: android.view.InflateException: Binary XML file line #20: Error inflating class com.google.android.gms.ads.AdView
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.view.LayoutInflater.createView(LayoutInflater.java:619)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:693)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.view.LayoutInflater.rInflate(LayoutInflater.java:752)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.view.LayoutInflater.rInflate(LayoutInflater.java:760)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
08-26 13:35:06.346: E/AndroidRuntime(9190): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:360)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.Activity.setContentView(Activity.java:1932)
08-26 13:35:06.346: E/AndroidRuntime(9190): at com.pucit.newgame.newgame.onCreate(newgame.java:93)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.Activity.performCreate(Activity.java:5326)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1097)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2218)
08-26 13:35:06.346: E/AndroidRuntime(9190): ... 11 more
08-26 13:35:06.346: E/AndroidRuntime(9190): Caused by: java.lang.reflect.InvocationTargetException
08-26 13:35:06.346: E/AndroidRuntime(9190): at java.lang.reflect.Constructor.constructNative(Native Method)
08-26 13:35:06.346: E/AndroidRuntime(9190): at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
08-26 13:35:06.346: E/AndroidRuntime(9190): at android.view.LayoutInflater.createView(LayoutInflater.java:593)
08-26 13:35:06.346: E/AndroidRuntime(9190): ... 23 more
08-26 13:35:06.346: E/AndroidRuntime(9190): Caused by: java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
08-26 13:35:06.346: E/AndroidRuntime(9190): at com.google.android.gms.internal.ao.<init>(Unknown Source)
08-26 13:35:06.346: E/AndroidRuntime(9190): at com.google.android.gms.internal.au.<init>(Unknown Source)
08-26 13:35:06.346: E/AndroidRuntime(9190): at com.google.android.gms.internal.au.<init>(Unknown Source)
08-26 13:35:06.346: E/AndroidRuntime(9190): at com.google.android.gms.ads.AdView.<init>(Unknown Source)