http://stackoverflow.com/questions/18520976/all-properties-of-intent-putextra-to-crop-image-in-android

http://www.cnblogs.com/iiahadadiaow/p/3979834.html

"return-data"
"cropped-rect"
"aspectX"
"aspectY"
"spotlightX"
"spotlightY"
"outputX"
"outputY"
"scale"
"data"
"scaleUIfNeeded"
"outputFormat"
"set-as-wallpaper"
"noFaceDetection"

intent-putextra-to-crop-image-in-android