I've started programming an Android application which implements a ListView and a simple Database and offers the opportunity to receive tasks from a specific Google Account and than add them to the ListView.
I used this Tutorial and the Tasks API to implement the code, but it doesn't work and there aren't many other tutorials on the web. Here's a snippet of my Start-Activity.
I created only one account on my phone, so I left out the 'Choose Accounts'-Dialog:
googleAccountManager = new GoogleAccountManager(RememberMe.this);
Account[] accounts = googleAccountManager.getAccounts();
account = accounts[0];
googleAccountManager.manager.getAuthToken(account, AUTH_TOKEN_TYPE, null, this, new AccountManagerCallback<Bundle>()
{
public void run(AccountManagerFuture<Bundle> future)
{
try
{
// If the user has authorized your application to use the tasks API
// a token is available.
String token = future.getResult().getString(AccountManager.KEY_AUTHTOKEN);
HttpTransport transport = AndroidHttp.newCompatibleTransport();
GoogleAccessProtectedResource googleAccessProtectedResource = new GoogleAccessProtectedResource(token);
service = new Tasks(transport, googleAccessProtectedResource, new JacksonFactory());
service.setKey("AIzaSyDAnO-UGa_zJnqftSVTHnvoHDp8Tfrmtko");
service.setApplicationName("Remember Me");
receivingTasks();
// Now you can use the Tasks API...
}
catch (OperationCanceledException e)
{
// TODO: The user has denied you access to the API, you should handle that
Log.w(TAG, "synchronize - Catch OperationCanceled Exception");
}
catch (Exception e)
{
Log.w(TAG, "synchronize - Catch Exception e");
}
}
}, null);
Here is the 'receiveTasks'-Method:
public void receivingTasks()
{
try
{
TaskLists taskLists = service.tasklists.list().execute();
for (TaskList taskList : taskLists.getItems())
{
Log.w(TAG, "" + taskList.getTitle());
}
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Everything's working fine - I get a token, there's a service-Object and a Account-Object - but when we get to
TaskLists taskLists = service.tasklists.list().execute();
it throws an exception and nothing happens, so I guess the TaskLists - Object isn't initialized, but I have no idea why "it is unable to respond" (LogCat).
Here's the LogCat:
11-29 15:57:58.848: W/DefaultRequestDirector(2878): Authentication error: Unable to respond to any of these challenges: {authsub=WWW-Authenticate: AuthSub realm="https://www.google.com/accounts/AuthSubRequest" allowed-scopes="https://www.googleapis.com/auth/tasks,https://www.googleapis.com/auth/tasks.readonly"}
11-29 15:57:58.858: W/System.err(2878): com.google.api.client.http.HttpResponseException: 401 Unauthorized
11-29 15:57:58.858: W/System.err(2878): at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:669)
11-29 15:57:58.868: W/System.err(2878): at com.google.api.services.tasks.Tasks$RemoteRequest.execute(Tasks.java:1571)
11-29 15:57:58.868: W/System.err(2878): at com.google.api.services.tasks.Tasks$Tasklists$List.executeUnparsed(Tasks.java:1277)
11-29 15:57:58.868: W/System.err(2878): at com.google.api.services.tasks.Tasks$Tasklists$List.execute(Tasks.java:1262)
I also wonder where the different between the tutorial and the API is, it would be great if someone could help me, because i don't know where else i could find help about this topic. Thanks a lot.
For everybody who got the same problem, try to save the token in the Shared Preferences and invalidate it every time the application is started and generate a new one due to a bug of the Account Manager; my problem could be solved this way: See this: https://groups.google.com/group/google-tasks-api/browse_thread/thread/6d65116019baf122/81293191c46ebdc6?lnk=gst&q=401#81293191c46ebdc6