Android - How do I open a file in another app via Intent?

Question

I\'m trying to open a file using another app, i.e. opening a .jpg with Gallery, .pdf with Acrobat, etc.

The problem I\'m having with this is when I try to open the file

Answer 1

I used this piece of code and it worked perfectly fine on android 6 and below not tested on the higher version

public void openFile(final String fileName){
    Intent intent = new Intent(Intent.ACTION_VIEW);
    Uri uri = Uri.fromFile(new File(android.os.Environment.getExternalStorageDirectory()
            .getAbsolutePath()+ File.separator+"/Folder/"+fileName));
    intent.setDataAndType(uri, "audio/mpeg");
    startActivity(intent);
}

Answer 2

Posting my changes here in case it can help someone else. I ended up changing the download location to an internal folder and adding a content provider.

public void open_file(String filename) {
    File path = new File(getFilesDir(), "dl");
    File file = new File(path, filename);

    // Get URI and MIME type of file
    Uri uri = FileProvider.getUriForFile(this, App.PACKAGE_NAME + ".fileprovider", file);
    String mime = getContentResolver().getType(uri);

    // Open file with user selected app
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    intent.setDataAndType(uri, mime);
    intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
    startActivity(intent);
}