我有以下方法：
public String tryGoogleAuthentication(String auth_token){
ContactsService contactsService = new ContactsService(".....");
contactsService.setUserToken(auth_token);
IFeed feed = null;
try {
feed = contactsService.getFeed(new URL("https://www.google.com/m8/feeds/ contacts/default/full?max-results=10000"), ContactFeed.class);
} catch (IOException e) {
e.printStackTrace();
return CONST.GOOGLE_AUTH_INVALID_TOKEN;
} catch (ServiceException e) {
e.printStackTrace();
return CONST.GOOGLE_AUTH_INVALID_TOKEN;
} catch (NullPointerException e) {
e.printStackTrace();
return CONST.GOOGLE_AUTH_INVALID_TOKEN;
}
if (feed == null)
return "";
String externalId = feed.getId();
IPerson person = feed.getAuthors().get(0);
String email = person.getEmail();
String name = person.getName();
String nameLang = person.getNameLang();
System.out.println("externalId: " + externalId);
System.out.println("email: " + email);
System.out.println("name: " + name);
System.out.println("nameLang: " + nameLang);
return CONST.STATUS_OK;
}
我收到错误：
java.lang.NullPointerException: No authentication header information
at com.google.gdata.util.AuthenticationException.initFromAuthHeader(AuthenticationException.java:96)
at com.google.gdata.util.AuthenticationException.<init>(AuthenticationException.java:67)
at com.google.gdata.client.http.HttpGDataRequest.handleErrorResponse(HttpGDataRequest.java:600)
at com.google.gdata.client.http.GoogleGDataRequest.handleErrorResponse(GoogleGDataRequest.java:563)
at com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:552)
at com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:530)
at com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:535)
at com.google.gdata.client.Service.getFeed(Service.java:1135)
at com.google.gdata.client.Service.getFeed(Service.java:998)
at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:631)
at com.google.gdata.client.Service.getFeed(Service.java:1017)
at ro.servlet.data.ClientAuthenticator.tryGoogleAuthentication(ClientAuthenticator.java:96)
....
请告诉我设置为contactsService的内容（setUserToken除外）才能正常工作？
之前我没有使用过gData（我是一个Android / iPhone开发人员） - 我从android设备中获取了auth字符串（通过让用户确认这一点）并通过安全通道传递给我的服务器 - 现在我想收集一些关于这个联系人的数据（第一个，姓氏和提供者uid - 我需要在我的应用程序中使用用户的数据库）。
我真的需要完成这项任务，所以，如果有人知道如何解决这个问题，请帮助我！
下面的类描述了我从android设备获取auth字符串的方式。
package ro.locationsApp.android.login;
import java.io.IOException;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.HttpParams;
import org.json.JSONObject;
import ro.locationsApp.android.CONST;
import android.R;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.accounts.AccountManagerCallback;
import android.accounts.AccountManagerFuture;
import android.accounts.AuthenticatorException;
import android.accounts.OperationCanceledException;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class AccountList extends ListActivity {
protected AccountManager accountManager;
protected Intent intent;
DefaultHttpClient http_client = getThreadSafeClient();
private Account currentUsedAccount;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
accountManager = AccountManager.get(getApplicationContext());
Account[] accounts = accountManager.getAccountsByType("com.google");
String[] names = new String[accounts.length];
for (int i = 0; i < accounts.length; i++) {
System.out.println(accounts[i].name);
names[i] = accounts[i].name;
}
this.setListAdapter(new ArrayAdapter<String>(this,
R.layout.simple_list_item_1, names));
}
@SuppressWarnings("unchecked")
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
Account account = accountManager.getAccountsByType("com.google")[position];
accountManager.getAuthToken(account, "ah", false,
new GetAuthTokenCallback(), null);
currentUsedAccount = account;
}
public static DefaultHttpClient getThreadSafeClient() {
DefaultHttpClient client = new DefaultHttpClient();
ClientConnectionManager mgr = client.getConnectionManager();
HttpParams params = client.getParams();
client = new DefaultHttpClient(new ThreadSafeClientConnManager(params,
mgr.getSchemeRegistry()), params);
return client;
}
@SuppressWarnings("rawtypes")
private class GetAuthTokenCallback implements AccountManagerCallback {
public void run(AccountManagerFuture result) {
Bundle bundle;
try {
bundle = (Bundle) result.getResult();
Intent intent = (Intent) bundle.get(AccountManager.KEY_INTENT);
if (intent != null) {
// User input required
startActivity(intent);
} else {
onGetAuthToken(bundle);
}
} catch (OperationCanceledException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (AuthenticatorException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
protected void onGetAuthToken(Bundle bundle) {
final String auth_token = bundle.getString(AccountManager.KEY_AUTHTOKEN);
System.out.println("AUTH TOKEN: " + auth_token);
new Thread(new Runnable() {
@Override
public void run() {
try {
JSONObject request = new JSONObject();
request.put(CONST.ID_ATTR, CONST.ID_GOOGLE_AUTH);
JSONObject body = new JSONObject();
body.put(CONST.GOOGLE_AUTH_TOKEN, auth_token);
request.put(CONST.DATA_ATTR, body);
JSONObject response = new JSONObject(new RequestHandler().request(DataSource.LOCATIONS_SERVER_URL, request.toString()));
String bodyResponse = response.optJSONObject(CONST.DATA_ATTR).optString(CONST.STATUS_ATTR);
if(bodyResponse.equals(CONST.STATUS_OK)){
}
else if(bodyResponse.equals(CONST.GOOGLE_AUTH_INVALID_TOKEN)){
runOnUiThread(new Runnable() {
@SuppressWarnings("unchecked")
public void run() {
invalidateUserToken(auth_token);
accountManager.getAuthToken(currentUsedAccount, "ah", false,
new GetAuthTokenCallback(), null);
}
});
}
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
public void invalidateUserToken(String token){
AccountManager accountManager = AccountManager.get(this);
accountManager.invalidateAuthToken("com.google", token);
}
}
谢谢，
亚历。