我使用谷歌地图api v2，我按照谷歌教程，这个logcat显示这些错误：
04-30 09:13:35.687: E/Trace(1875): error opening trace file: No such file or directory (2)
04-30 09:13:36.974: W/dalvikvm(1875): VFY: unable to resolve static field 875 (MapAttrs) in Lcom/google/android/gms/R$styleable;
04-30 09:13:36.974: D/dalvikvm(1875): VFY: replacing opcode 0x62 at 0x000e
04-30 09:13:37.034: D/AndroidRuntime(1875): Shutting down VM
04-30 09:13:37.034: W/dalvikvm(1875): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
04-30 09:13:37.086: E/AndroidRuntime(1875): FATAL EXCEPTION: main
04-30 09:13:37.086: E/AndroidRuntime(1875): java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
04-30 09:13:37.086: E/AndroidRuntime(1875): at com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(Unknown Source)
04-30 09:13:37.086: E/AndroidRuntime(1875): at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:279)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
04-30 09:13:37.086: E/AndroidRuntime(1875): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.app.Activity.setContentView(Activity.java:1881)
04-30 09:13:37.086: E/AndroidRuntime(1875): at com.example.androidapplication.MainActivity.onCreate(MainActivity.java:18)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.app.Activity.performCreate(Activity.java:5104)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.app.ActivityThread.access$600(ActivityThread.java:141)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.os.Handler.dispatchMessage(Handler.java:99)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.os.Looper.loop(Looper.java:137)
04-30 09:13:37.086: E/AndroidRuntime(1875): at android.app.ActivityThread.main(ActivityThread.java:5041)
04-30 09:13:37.086: E/AndroidRuntime(1875): at java.lang.reflect.Method.invokeNative(Native Method)
04-30 09:13:37.086: E/AndroidRuntime(1875): at java.lang.reflect.Method.invoke(Method.java:511)
04-30 09:13:37.086: E/AndroidRuntime(1875): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-30 09:13:37.086: E/AndroidRuntime(1875): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-30 09:13:37.086: E/AndroidRuntime(1875): at dalvik.system.NativeStart.main(Native Method)