You can also use the DDMS tool in eclipse to push or pull a file onto the emulator. On a 2.2 emulator I was able to push some .jpg images into the /mnt/sdcard/DCIM/100ANDRO folder using DDMS. I then had to go into the running emulator itself, select "Dev Tools" from the Apps screen, the select "Media Scanner" (or "Media Provider" in newer versions of Android) to get the emulator to recognize the files so they would be displayed in the Media Gallery.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…