How we save image in gallery of emulator
Steps:-
1) Go to File Explorer (if it not there then add file explorer from Windows->Show views->File Explorer
)
2) Push Images into mnt->SDcard
3) How to push? Click on icon(Push a file into device) on right side of screen in Eclipse.
3) After pushing file, go to dev tools in emulator. In that go to Media Scanner.
4) After scanning your images are display in galary of emulator.
This only works on Genymotion (Android Emulator)
You can easily do this by Dragging any image to emulator screen from PC and it will transfer from PC's path to emulator downloads folder.