Check this Once you have a virtual SD card in your emulator, if you're not comfortable with mtools
or if you don't know how to mount a loopback device on Linux (which is really easy by the way), just use adb push
to upload your images. Possible example:
adb shell mkdir /sdcard/Pictures
adb push mypic.jpg /sdcard/Pictures
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…