Java GoogleAuthUtil.getToken Android客户端-谷歌云端点

我在appengine中有以下实体

@Api(
        name = "profileendpoints", 
        version = "v1", 
        scopes = {EMAIL_SCOPE}, 
        clientIds = {ANDROID_CLIENT_ID, API_EXPLORER_CLIENT_ID, WEB_CLIENT_ID},
        audiences = {WEB_CLIENT_ID}
        )
public class ProfileEndPoints {
    ...
}

在android项目中，在MainActivity的onCreate方法中，我有ff：

    settings = getSharedPreferences("profile", 0);
    credential = GoogleAccountCredential.usingAudience(this,
       "server:client_id:" + WEB_CLIENT_ID);

但我得到了以下错误：

I/dalvikvm(477): Could not find method  
com.google.android.gms.auth.GoogleAuthUtil.getToken, referenced from method 
com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential.getToken

我的android项目的

libs

文件夹中有以下jar文件

google-api-client-1.16.0-rc.jar
google-api-client-android-1.16.0-rc.jar
google-http-client-1.16.0-rc.jar
google-http-client-android-1.16.0-rc.jar
google-http-client-gson-1.16.0-rc.jar
google-oauth-client-1.16.0-rc.jar
gson-2.1.jar
jsr305-1.3.9.jar

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该方法是Google Play服务的一部分。确保Google Play Services已作为项目的依赖项添加，并且在运行应用程序的设备（或模拟器）上可用