How to find the type of a selected file after Picking the file via an Intent in Android?

Issue

I can pick a file that is PDF or image by the following code:

            Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
            intent.addCategory(Intent.CATEGORY_OPENABLE);
            intent.setType("*/*");
            String[] mimetypes = {"image/*", "application/pdf"
            };
            intent.putExtra(Intent.EXTRA_MIME_TYPES, mimetypes);
            startActivityForResult(Intent.createChooser(intent, "Select a file"),REQUEST_GET_SINGLE_FILE);

I receive the result in the following method:

    public void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
       try {
           if (resultCode == Activity.RESULT_OK) {
              if (requestCode == REQUEST_GET_SINGLE_FILE ) {
                 Uri selectedImageUri = data.getData();
                 ....
                 ....

I need to find that the selected file is a PDF or an image? How can I find the type of file?

Solution

I recommend you to have a read to ContentResolver documentation and then read this Retriefe-info documentation then you'll be able to get the extension of your file.

MIME type

Uri selectedImageUri = data.getData();
String mimeType = getContentResolver().getType(selectedImageUri);

It will return something like this :

"image/jpeg"

"image/png"

If you want to use a Cursor you can do it as :

Cursor cursor = getContentResolver().query(selectedImageUri, null, null, null, null);
   if (cursor.moveToFirst()) {
        int columnIndex = cursor.getColumnIndex(0);
        String filePath = cursor.getString(columnIndex);
        String extension = filePath.substring(filePath.lastIndexOf(".") + 1); //will return pdf
   }
cursor.close();

Answered By - Skizo-ozᴉʞS