AccountManager哪個帳戶被刪除

Question

我知道AccountManager的addOnAccountsUpdatedListener()可以用來獲取有關帳戶列表更改的通知。如果發生這種事件，框架將調用所提供的OnAccountsUpdateListener的onAccountsUpdated()方法。但該方法的參數只包含帳戶列表。我如何知道用戶刪除了哪個帳戶？提前致謝！

Answer 1

取決於你想做什麼，你可能會擺脫這樣的：

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. 
}