How to check file extension on Android

Question

In my application, when we browse the file from the SD card, the files will be .text, .jpg and mpeg4ie video files.

I want to store each file type into a particular folder. For example, .text files go to the text folder. When I select the file, how do I check the file extension?

Answer 1

I would get the file name as a String, split it into an array with "." as the delimiter, and then get the last index of the array, which would be the file extension. For example:

public class main {     public static void main(String[] args) {         String filename = "image.jpg";         String filenameArray[] = filename.split("\\.");         String extension = filenameArray[filenameArray.length-1];         System.out.println(extension);     } } 

Which outputs:

jpg