android create file problem

How to create a file in the specified directory of the file system<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->
Reply:
new File ();
Reply:
The main problem is to write the project have permission SD card.
WRITE_EXTERNAL_STOREAGE
Permission to add their own look. Output file stream to write documents, a piece of cake!