A 16-year-old was shot in both legs on 18 December and was taken to hospital.
It happened in Aitnamona Crescent at 20:50 GMT.
Police have said the man is in police custody and continue to appeal for information from anyone who knows anything about the attack.

The lender said that property prices grew by 3.6% in the three months to the end of July compared with the previous quarter.
The monthly increase was 1.4% compared with June, making the average home worth Â£186,332.
The figures are at odds with other surveys which suggest a slowdown.
This is the first time since September 2007 that the annual change has gone above 10%, according to the Halifax. It accelerated from an 8.8% rise in June.
"While supply remains low, housing demand continues to be supported by a continuing economic recovery, growth in employment, improving consumer confidence and low mortgage rates," said Stephen Noakes, mortgages director at the Halifax.
The numbers, based on its own mortgage lending, counter the view put forward by rival lender Nationwide, which said prices had started to moderate.
The Nationwide's estimate of the annual house price rise slowed from 11.8% in June to 10.6% in July.
The year-on-year comparison is calculated slightly differently by the two lenders. The Halifax compares the previous three months with the same three months a year earlier to give a smoother comparison, rather than a direct comparison of the equivalent months as calculated by the Nationwide.
The Land Registry has also suggested that seven out of 10 regions of England and Wales showed a monthly fall in prices, although these short-term price changes are often volatile.
Howard Archer, chief UK and European economist for IHS Global Insight, said: "On balance, we take the view that house prices will keep on clearly rising over the coming months but there will be some moderation from the recent peak levels."
Halifax is part of Lloyds Banking Group, which recently announced that it was moving to reduce its share of mortgages under the government's Help to Buy scheme.
Borrowers are now able to raise a maximum of Â£150,000 through Help to Buy, down from Â£500,000.
Under the scheme, buyers are required to provide a deposit of of 5% of the home's value, with another 20% backed by the government if the buyer fails to keep up with repayments.
The Bank of England has also taken action to try to ensure mortgage lending does not reach unsustainable levels.
Enter your details into the calculator to find out:
Find out more about this calculator

Percy Jeeves played for the Goole Cricket Club and professionally for Warwickshire and Hawes before his death in World War One in July 1916.
PG Wodehouse used his name for the immaculate valet after seeing him play at Cheltenham in 1913.
The plaque is on the corner of Manuel Street, Goole, where Jeeves lived.
Live updates on this story and others from Hull and East Yorkshire
It was organised by the Goole Civic Society and unveiled by his great nephew Keith Mellard.
Mr Mellard, 79, said: "I'm absolutely thrilled to be unveiling the plaque.
"His brother, Alec Jeeves, was my grandfather. He used to talk about him a lot and I grew up feeling I knew him.
"To be honoured in this way is very exciting."
Margaret Hicks-Clarke, chair of the society, said: "We could think of no finer person to honour with our first blue plaque, being unveiled in the anniversary year of Percy Jeeves's death.
"He was a great cricketer and a brave soldier who paid the ultimate sacrifice for his country."
Jeeves, who was born in 1888 near Dewsbury, West Yorkshire, grew up in Goole before playing county cricket for Warwickshire.
Mrs Hicks-Clarke said: "His father had moved to Goole to work on the railways at the start of the 1900s and Percy lived in a little terraced house with his family."
Comic novelist PG Wodehouse brought the Jeeves character to life in a series of short stories and books in which the knowledgeable and perceptive butler helped his master Bertie Wooster cope with life's vagaries.
The plaque, which is placed on the Oddfellows building at the corner of Manuel Street and Boothferry Road, has been funded by the Goole and District Lottery, Goole Town Cricket Club and the PG Wodehouse Society.
A 42-year-old has been arrested over a paramilitary-style attack in west Belfast.
[NEXT_CONCEPT]
UK house prices in July were up 10.2% from a year earlier - the biggest annual change since September 2007, according to the Halifax.
[NEXT_CONCEPT]
A blue plaque honouring a cricketer whose name inspired author PG Wodehouse's butler Jeeves has been unveiled.