If you are using gson library for parsing json respose then you could simply write a separate class
like this
public class ImageResponse{
public String Status;
public List<String> lists;
}
NOTE: when creating a class the object names of the class should match with the tag names from the server..
Then using gson
ImageResponse detail = (new Gson()).fromJson(
response.toString(), ImageResponse.class);
where response is your response from the server
now u can access the list like
List<String> images =details.lists;
Now you have all the images in the list form, you can load the images using Picasso[lets say in a listview]
Picasso.with(context).load(images[0]).into(imageView);
For using this you should add GSON library to your dependency in your app gradle
compile 'com.google.code.gson:gson:2.2.4'
There are many other method too, feel free to search and find out may be there will be more optimized code than this..