Creating folder in internal Memory to save files and retrieve them later

Question

I want to make a folder in the Internal Memory in my application to store Audio Files,then check if the exist to do some operations. How to make this folde, in which path, a

Answer 1

File mydir = context.getDir("mydir", Context.MODE_PRIVATE); //Creating an internal dir;
File fileWithinMyDir = new File(mydir, "myfile"); //Getting a file within the dir.
FileOutputStream out = new FileOutputStream(fileWithinMyDir); //Use the stream as usual to write into the file

For deleting a file from internal :

if (new File("path/to/file").delete()) {
  // Deleted
} else {
  // Not deleted
}