SyncAdapter没有得到号召＆QUOT;网络挠痒痒＆QUOT; [英] SyncAdapter not getting called on "Network tickle"

问题描述

概述

我follwed 谷歌的教程使用SyncAdapter不使用的ContentProvider，Authenticator..etc 。它完美的作品时，我称之为 onPerformSync（...），当我需要做一个上载经德SyncAdapter服务器。

I follwed Google's tutorial on using SyncAdapter without using ContentProvider, Authenticator..etc. It works perfectly when I call onPerformSync(...) when I need to do an "upload" to the server via de SyncAdapter.

现在，你可以想像，我需要从服务器上做下载，以及（是的，我明白，这将是更好地使用谷歌的云端通讯系统，但这是建立我得到了，我可以' T改变这一点）。对于这一点，而不是做定期同步，我想利用网络挠痒痒Android系统执行时有可用的网络。对于我声明如下：

Now, as you can imagine, I need to do downloads from the server as well (yes I understand that it would be better to use Google's Cloud Messaing system, but this is the set up I was given, and I can't change that). For that, instead of doing periodical syncs, I want to make use of the "Network tickle" Android system carries out when there is a network available. For that I state the following:

ContentResolver.setIsSyncable(accounts[0], AUTHORITY, 1);
ContentResolver.setSyncAutomatically(accounts[0], AUTHORITY, true); 

但我SyncAdapter 只是没有得到所谓的。寻找其他StackOverflow的问题，似乎有一个问题，如果目标定位API 10或以下，SyncAdapter而且你必须在添加帐户明确的方法之前调用。所以，我结束了这一点：

But my SyncAdapter is just not getting called. Looking into other stackOverFlow questions, there seem to be a problem if targetting API 10 or below with SyncAdapter and that you must add an account explicitly before calling the before methods. So I ended up with this:

AccountManager accountManager = (AccountManager) context.getSystemService(ACCOUNT_SERVICE);

    Account[] accounts = accountManager.getAccounts();
    if(accounts.length == 0){ //ADD DUMMY ACCOUNT
        Account newAccount = new Account(ACCOUNT, ACCOUNT_TYPE);
        ContentResolver.setIsSyncable(accounts[0], AUTHORITY, 1);
        ContentResolver.setSyncAutomatically(accounts[0], AUTHORITY, true); 
        accountManager.addAccountExplicitly(newAccount, null, null);
    }else{
         accounts = accountManager.getAccounts();
        ContentResolver.setIsSyncable(accounts[0], AUTHORITY, 1);   
        ContentResolver.setSyncAutomatically(accounts[0], AUTHORITY, true); 
    }

现在这个code被执行时，在用户登录，或者如果应用程序被打死，再次启动。我想知道，我应该叫 setIsSyncable 和 setSyncAutomatically 只有当我加入dummyAccount的第一次？

Now this code gets executed when the user signs in, or if the application was killed and is started up again. I am wondering, should I call setIsSyncable and setSyncAutomatically only when I add the dummyAccount the very first time?

此外，在SyncAdapter的goodiness的部分是，它会保持在一个异常的情况下，使得调用。但我不明白这是如何去一下，所以不是我有这样的：

Also, part of the "goodiness" of the SyncAdapter is that it will keep on making the calls in case of an exception. But I don't quite understand how this goes about, so instead I have this:

private void profileUpdate(){       
TableAccounts db = TableAccounts.getInstance(getContext());
boolean isRecordDirty = db.isRecordDirty(signedInUser);   

if(isRecordDirty){
   if(server.upDateUserProfile(signedInUser)){
       db.cleanDirtyRecord(signedInUser);
       turnOffPeriodicSync();
   }else{
       this.turnOnPeriodicSync(this.sync_bundle);   
   }
}else
     turnOffPeriodicSync();

}

正如你所看到的，这取决于我上传到服务器的结果，我打开或关闭周期同步。

As you can see, depending on the result of my upload to the server, I turn on or off a periodic sync.

推荐答案

由于accountManager.getAccounts []返回设备上的每个帐户，我觉得没有什么保证该帐户[0]为您的应用程序的帐户（即，有你的包名ACCOUNT_TYPE）。
- 你可以在任何情况下调用addAccountExplicitly（），如果存在，则什么也不会发生。

Since the accountManager.getAccounts[] return every account on the device, I think nothing guarantee that the account[0] is your app's account (aka, has the ACCOUNT_TYPE of your package name). -- You could call addAccountExplicitly() in any case, if it is existed, then nothing happens.

    Account account = new Account(ACCOUNT, ACCOUNT_TYPE);

    AccountManager accountManager = (AccountManager) context.getSystemService(Context.ACCOUNT_SERVICE);
    accountManager.addAccountExplicitly(account, null, null)
    context.getContentResolver().setSyncAutomatically(account, AUTHORITY, true);

这篇关于SyncAdapter没有得到号召＆QUOT;网络挠痒痒＆QUOT;的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！