adb shell screencap -h

usage: screencap [-hp] [-d display-id] [FILENAME]

? -h: this message

? -p: save the file as a png.

? -d: specify the physical display ID to capture (default: 4630947043778501762)

? ? ? see "dumpsys SurfaceFlinger --display-id" for valid display IDs.

If FILENAME ends with .png it will be saved as a png.

If FILENAME is not given, the results will be printed to stdout.

例子：

adb shell screencap -p -d 1 /sdcard/test3.png

adb pull /sdcard/test3.png

-d參數(shù)代表如果手機有兩個屏幕。例如折疊屏手機，需要用不同的displayid代表不同的屏幕，默認是0

查看displayid：

adb shell dumpsys SurfaceFlinger --display-id

Display 4630947043778501763 (HWC display 3): port=131 pnpId=QCM displayName=""

Display 4630947043778501762 (HWC display 0): port=130 pnpId=QCM displayName=""