Java 获取Gmail联系人Android应用程序

我正试图找出如何在我的

应用程序中获取
Gmail联系人

关于在链接中实现代码

我收到下面指定的异常：-

但我得到的异常是由java.lang.NullPointerException引起的

com.google.gdata.client.http.HttpGDataRequest.isOAuthProxyErrorResponse

并使用上的示例代码

我得到的例外情况如下：-

 03-07 17:05:21.601: E/AndroidRuntime(18754): java.lang.NoClassDefFoundError: Failed resolution of:                                                                                                                                         Loauth/signpost/commonshttp/CommonsHttpOAuthConsumer;
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at com.netcomps.oauth_example.RequestTokenActivity.onCreate(RequestTokenActivity.java:32)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.app.Activity.performCreate(Activity.java:5990)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.app.ActivityThread.access$800(ActivityThread.java:151)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.os.Handler.dispatchMessage(Handler.java:102)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.os.Looper.loop(Looper.java:135)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at android.app.ActivityThread.main(ActivityThread.java:5254)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at java.lang.reflect.Method.invoke(Native Method)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at java.lang.reflect.Method.invoke(Method.java:372)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
 03-07 17:05:21.601: E/AndroidRuntime(18754): Caused by: java.lang.ClassNotFoundException: Didn't find class "oauth.signpost.commonshttp.CommonsHttpOAuthConsumer" on path: DexPathList[[zip file "/data/app/com.netcomps.oauth_example-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
 03-07 17:05:21.601: E/AndroidRuntime(18754):   ... 14 more
 03-07 17:05:21.601: E/AndroidRuntime(18754):   Suppressed: java.lang.ClassNotFoundException: oauth.signpost.commonshttp.CommonsHttpOAuthConsumer
 03-07 17:05:21.601: E/AndroidRuntime(18754):       at java.lang.Class.classForName(Native Method)
 03-07 17:05:21.601: E/AndroidRuntime(18754):       at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
 03-07 17:05:21.601: E/AndroidRuntime(18754):       at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
 03-07 17:05:21.601: E/AndroidRuntime(18754):       at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
 03-07 17:05:21.601: E/AndroidRuntime(18754):       ... 15 more
 03-07 17:05:21.601: E/AndroidRuntime(18754):   Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

你能帮帮我吗

最后，我找到了获取Google/Gmail联系人的解决方案。下面的链接非常适合回答我的问题


这对我帮助很大

最新答复：

由于谷歌正在阻止来自webView的oAuth，因此此链接可帮助您获取gmail联系人