Question

我正在使用contacservice类，我设置了我的Gmail帐户的用户凭据我想从谷歌联系人那里得到我的代码的联系方式如下

ContactService myservice=new ContactService("ex-app-1.0");

  myservice.setUserCredentials("username","password");

  URL url=new URL("https://www.google.com/m8/feeds/contacts/xxx@gmail.com/full");

ContactFeed resultFeed = myService.getFeed(feedUrl, ContactFeed.class);

但我在logcat

中遇到了这样的异常

03-16 12:24:49.217: E/AndroidRuntime(1013): FATAL EXCEPTION: main

03-16 12:24:49.217: E/AndroidRuntime(1013): java.lang.RuntimeException: Unable to start activity

ComponentInfo{c.b.p/c.b.p.ContactsBackupActivity}: java.lang.NullPointerException

03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.os.Looper.loop(Looper.java:123)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.app.ActivityThread.main(ActivityThread.java:4627)
03-16 12:24:49.217: E/AndroidRuntime(1013):     at java.lang.reflect.Method.invokeNative(Native Method)
03-16 12:24:49.217: E/AndroidRuntime(1013):     at java.lang.reflect.Method.invoke(Method.java:521)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at dalvik.system.NativeStart.main(Native Method)

03-16 12:24:49.217: E/AndroidRuntime(1013): Caused by: java.lang.NullPointerException
03-16 12:24:49.217: E/AndroidRuntime(1013):     at c.b.p.ContactsBackupActivity.onCreate(ContactsBackupActivity.java:128)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)

03-16 12:24:49.217: E/AndroidRuntime(1013):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)

03-16 12:24:49.217: E/AndroidRuntime(1013):     ... 11 more
03-16 12:29:49.329: I/Process(1013): Sending signal. PID: 1013 SIG: 9

如何在Android中以编程方式从谷歌联系人获取联系人

0 个答案: