Question

我正在开发一个我希望与服务器同步数据的Android应用。为此，我使用Android sync api和SyncAdapter。现在，当我请求手动同步时，我的同步适配器中的onPerformSync方法被正确调用。我已添加此列表中的所有要点：https://stackoverflow.com/a/5255360/3795043

然而，当我尝试定时同步时，日志中有一个消息：

10-18 23:30:08.267 862-882/? W/SyncManager: Ignoring setPeriodicSyncTime request for a sync that does not exist. Authority: TwoRoomsSync/de.lehrbaum.tworooms.database:u0

为什么会这样？同步显然存在，否则手动请求它也不会工作，或？这是设置同步的代码：

final Account accountInstance = new Account(
       account, account_type);
// Get an instance of the Android account manager
AccountManager accountManager =
       (AccountManager) getSystemService(
                    ACCOUNT_SERVICE);
final boolean firstTime = accountManager.addAccountExplicitly(accountInstance, null, null);

if(firstTime) {
    //set sync enabled by default
    ContentResolver.setSyncAutomatically(accountInstance, authority, true);
    ContentResolver.addPeriodicSync(accountInstance, authority,
            Bundle.EMPTY, /* 5 hours interval */5 * 60 * 60);
    //request a sync
    final Bundle settingsBundle = new Bundle();
    settingsBundle.putBoolean(
            ContentResolver.SYNC_EXTRAS_MANUAL, true);
    ContentResolver.requestSync(accountInstance, authority, settingsBundle);
}
SyncAdapter.SYNC_OBSERVER = new ContentObserver(new Handler(getMainLooper())) {
    @Override
    public boolean deliverSelfNotifications() {
        return false;
    }
    @Override
    public void onChange(boolean selfChange) {
        Log.i(TAG, "On change for sync called. self change: " + selfChange);
        ContentResolver.requestSync(accountInstance, authority, Bundle.EMPTY);
    }
};
final ContentResolver resolver = getContentResolver();
Uri uri = Uri.withAppendedPath(CONTENT_URI, VOTES_TABLE);
resolver.registerContentObserver(uri, true, SyncAdapter.SYNC_OBSERVER);
uri = Uri.withAppendedPath(CONTENT_URI, SETS_TABLE);
resolver.registerContentObserver(uri, true, SyncAdapter.SYNC_OBSERVER);

此外，当我在不添加“手动”标志的情况下请求同步时，它也不起作用。我不知道这两个问题是否相关。

Android：忽略定期同步请求，因为同步不存在

0 个答案: