如何从 URI 获取文件扩展名？

Question

I am selecting a file from the galley and then in onActivityResult, I am getting the Uri. Now I want to get the extension of the file from Uri. I tried many ways but none of them worked. Please help.

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        
         Uri uri = data.getData();

} 

Answer 1

 String extension =  data.getPath().substring(data.getPath().lastIndexOf("."))

Answer 2

Use the content resolver to query the uri for.DISPLAY_NAME.

The name comes with extension.