Android check file extension

//if you have the path
String someFilepath = "image.fromyesterday.test.jpg"; 
String extension = someFilepath.substring(someFilepath.lastIndexOf("."));

//direct with file
String extension = ff.getAbsolutePath().substring(ff.getAbsolutePath().lastIndexOf("."));

Source: stackoverflow.com

Get extension file from android

get file extension

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