구글 계정 있는지 검색

AccountManager manager = (AccountManager) getSystemService(ACCOUNT_SERVICE);

Account[] list = manager.getAccounts();

String gmail = null;


for(Account account: list)

{

    if(account.type.equalsIgnoreCase("com.google"))

    {

        gmail = account.name;

        break;

    }

}



<uses-permission android:name="android.permission.GET_ACCOUNTS"></uses-permission>