Transferring media like music, pictures and videos onto your Android device is very simple. All you have to do is connect the Android device to your computer and you’ll be able to view all the files through the "My Computer" of your PC or Finder on your Mac.
If you want to transfer your iPhone photos to your Android device, you’ll first have to transfer it to your PC. Demoing this import from a Windows 8 PC, you can right click on your iPhone from the My Computer and click on Import pictures and videos.
It’ll take a while to search for all your pictures and videos before you can select the folder you want to import to.
After that, just drag all your picture and video files in that folder into your Android device.
Alternatively, you can use AirDroid to wirelessly transfer media from your phone to the computer and vice versa (if there is a need).