三星s7没有提供gmail id

Question

为什么三星s7没有在Android中以编程方式使用谷歌帐户提供其Gmail ID？

private static Account getAccount(AccountManager accountManager) {
        Account[] accounts = accountManager.getAccountsByType("com.google");
        Account account;
        if (accounts.length > 0) {
            account = accounts[0];
        } else {
            account = null;
        }
        return account;
    }

    public String GET_EMAIL_ADDRESSES() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(Manifest.permission.GET_ACCOUNTS) != PackageManager.PERMISSION_GRANTED) {
            requestPermissions(new String[]{Manifest.permission.GET_ACCOUNTS}, PERMISSIONS_REQUEST_READ_CONTACTS);
            //After this point you wait for callback in onRequestPermissionsResult(int, String[], int[]) overriden method
        } else {
            email = getEmiailID(getApplicationContext());
            System.out.println("CORREO SELECCIONADO: " + email);
        }
        return email;
    }