Well, there was three different ways Christianity came to African Americans.
1.) Slaves were brought over to America and learned of it there.
2.) In Africa, missionaries shared Christianity and then native Africans came to America.
3.) In Northern Africa, there were Christians that came from the Middle East (some were out of the Diaspora when Rome finally pushed the Jewish people out of their land) and then Africans who were Christians moved to America.
The term African-American isn't limited to slaves that came from Africa, it refers to any African who has been/is an American.
But, if you are specifically asking about previous slaves and how Christianity affected them, then it's a little different.
A lot of slaves accepted Christian beliefs but not all did. I wasn't a slave back then and no one else alive today was either so the best thing to do is read accounts of those who were.
The first is a quote from Phyllis Wheatley, said in her poem "On Being Brought from Africa to America":
'Twas mercy brought me from my Pagan land,
Taught my benighted soul to understand
That there's a God, that there's a Saviour too.. "
What will also help you is to read narratives and accounts of others. There are many (yet not all) who reflect the same feelings as Phyllis Wheatley.
As for influence today, Christianity is still a strong belief among African Americans.
People comverted to the new religions and developed rich traditions and communities
I think a better question would be what is the implications of Christianity on African traditions.
Christianity greatly increaed on the African continent
Christianity APEX
That African Americans needed to create their own communities.
Christianity promised freedom
Christianity promised freedom
The traditional African religion influenced most African art, but Christianity influenced Ethiopian art.
No, the Lord in the bible did not order the murder of the African people because of Christianity.
No, the Lord in the Bible did not order the murder of the African people because of Christianity.
The people of Mali generally practice Islam, with the majority of the population being Muslim. There are also smaller communities that adhere to traditional African religions and Christianity.
Christianity promised freedom