Grammar

I lived in London. (simple past)
I have lived in London. (present perfect).

There is little difference in meaning.

Little difference in meaning, but normally "I lived in London" would suggest that some time indication is being given, as in "I lived in London in 2005".

I lived in London: It means you lived in London in the past and now you are not living there.

I have lived in London: It means currently you are living in London.

Shravan.

shravanmmI have lived in London: It means currently you are living in London.

Not necessarily.
It only means that you are currently living there when you include the appropriate adverbial phrase. (eg. since 2009, for three years, )

1. I have been living in London since 2005 and I have lived in London since 2005. Do they both mean the same?

2. What is the meaning of I have lived in London. Does it mean I lived in London before not now?

Thank you.

shravanmm1. I have been living in London since 2005 and I have lived in London since 2005. Do they both mean the same?

The former may have a suggestion that you see your residence in London as temporary; the second does not have this idea. However, the difference is not really significant.

shravanmm2. What is the meaning of I have lived

shravanmm2. What is the meaning of I have lived in London. Does it mean I lived in London before not not?

Others already commented. I just want to offer my two cents on this. The sentence is not semantically complete as stand. You need some kind of adverbial phrase or dependen

grammarfreakYou need some kind of adverbial phrase or dependent clause to modify it so that it has a solidified context.

Not necessarily. The context need not be in that sentence.

A: Have you ever lived in a capital city?
B: I have lived in London.

fivejedjonNot necessarily. The context need not be in that sentence.

This is what my comment was: The sentence is not semantically complete as stand.

fivejedjonA: Have you ever lived in a capital city?B: I have lived in London.

If you reconstruct the context, anything is possible. Besides, even with the question form

grammarfreakThis is what my comment was: The sentence is not semantically complete as stand

I was responding to your: "You need some kind of adverbial phrase or dependent clause to modify it so that it has a solidified context. I have lived in London [ for some time]/[since I arrived three years a