AccountManager哪个帐户被删除

Question

我知道AccountManager的addOnAccountsUpdatedListener()可以用来获取有关帐户列表更改的通知。如果发生这种事件，框架将调用所提供的OnAccountsUpdateListener的onAccountsUpdated()方法。但该方法的参数只包含帐户列表。我如何知道用户删除了哪个帐户？提前致谢！

Answer 1

取决于你想做什么，你可能会摆脱这样的：

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. 
}