android - AccountManager 删除了哪个账户

Question

我知道 AccountManager的 addOnAccountsUpdatedListener()可用于获取有关帐户列表更改的通知。如果发生此类事件，框架将调用提供的 OnAccountsUpdateListener的 onAccountsUpdated()方法。但是该方法的参数只包含帐户列表。我怎么知道哪个帐户被用户删除了？提前致谢!

Answer 1

根据您尝试执行的操作，您可能会这样做:

private Set<Account> mAccountCache; // init & populated when the listener is registered

@Override
public void onAccountsUpdated(Account[] accounts) {
    // This code assumes we're only interested in removed items.
    final Set<Account> currentAccounts = new HashSet<Account>(Arrays.asList(accounts));
    final Set<Account> removedAccounts = new HashSet<Account>(mAccountCache);
    removedAccounts.removeAll(currentAccounts); // populated with Accounts that were removed.
}