A friend in need is a friend indeed? Qual o significado desta expressão idiomática?

A friend in need is a friend indeed  is an Idiom and it means:  A friend in need is a friend indeed says that people often act friendly when they want to get something from us.  Example: "Hey buddy, how's it going? You look good. I love your jacket. Do you think you can give me a ride home?" Reply: "A friend in need is a friend indeed."  A friend in need is a friend indeed can be said when you notice that someone is being extra friendly to you and acting like your good friend as a way to get you to give them what they need.  Definitely, in my point view I translate this in Portuguese....os amigos são para as ocasiões. Numa tradução livre...você só conhece os amigos nas horas difíceis.  Source: GO ENGLISH