How to get the file extension in Android?

Question

lots of ways . here are 2 sample-

String someFilepath = "image.fromyesterday.test.jpg"; 
String extension = someFilepath.substring(someFilepath.lastIndexOf("."));

So in you case, it should be something like that

String extension = ff.getAbsolutePath().substring(ff.getAbsolutePath().lastIndexOf("."));

In case if you don’t want to do it yourself-

use FilenameUtils.getExtension from Apache Commons IO-

String extension = FilenameUtils.getExtension("/path/to/file/mytext.txt");

or in your case –

String extension = FilenameUtils.getExtension(ff.getAbsolutePath());