I am trying to create a very simple Image Downloading app. in which i want to download all images from this url to sd card: https://www.dropbox.com/sh/5be3kgehyg8uzh2
Check these links
Why use Android Picasso library to download images?
http://www.opensourcealternative.org/tutorials/android-tutorials/android-picasso-save-image-tutorial/
http://www.101apps.co.za/articles/gridview-tutorial-using-the-picasso-library.html
http://www.youtube.com/watch?v=tRTFwzUH_ek
http://square.github.io/picasso/
Using Picasso, your code will be of only 1 line
Picasso.with(context).load("your URL").into(your_imageView);
To store into external sd card
Android saving file to external storage
Write a file in external storage in Android
http://www.javatpoint.com/android-external-storage-example