DeviceUtils.java 文件源码

public static String getDeviceEmailAddress(Activity activity) {
    Pattern emailPattern = Patterns.EMAIL_ADDRESS;
    if (ActivityCompat.checkSelfPermission(activity, Manifest.permission.GET_ACCOUNTS) != PackageManager.PERMISSION_GRANTED) {
        return "";
    }
    Account[] accounts = AccountManager.get(activity).getAccounts();
    for (Account account : accounts) {
        if (emailPattern.matcher(account.name).matches()) {
            return account.name;
        }
    }
    return "";
}