打开终端，cd 到任意一个指定的目录，执行下面的命令即可

Shell命令

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adb shell "/system/bin/screencap -p /sdcard/screenshot_tmp.png"
adb pull /sdcard/screenshot_tmp.png ./screenshot.png
adb shell "rm -r /sdcard/screenshot_tmp.png"

快捷调用

编辑 ~/.bash_profile 文件，加入如下语句，即可一键截图并保存到 桌面

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alias screenshot='adb shell "/system/bin/screencap -p /sdcard/screenshot_tmp.png";file=`date +%Y-%m-%d_%H%M%S`;adb pull /sdcard/screenshot_tmp.png ~/Desktop/${file}.png;adb shell "rm -r /sdcard/screenshot_tmp.png"'