out/host/linux-x86/bin# ./ddms
(DDMS:12505): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to allocate widget with width -5 and height 17
(DDMS:12505): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to allocate widget with width -5 and height 17
會跳出一個視窗, 選取該產品的編號
再選 device => Screen Capture
就可以了