Preface:The
magnification Gesture is a feature of the Android system's auxiliary settings, which provides a magnified view of any window in the world to help users who are not particularly well-off and can use it to improve the user experience. This document is based on Android4.2.2 for analysis, including opening from settings, user triggering to mechanism running a complete set of processes.
Article directory:first, about magnification Gesturesecond, the system service initiation process related to magnification gesturethird, the operation from the user--open the magnification gesture switch execution process
four, from the user's operation--Continuous click on the screen three times trigger magnification gesture execution Process
full content and call relationship timing diagram Please download the PDF document directly:
Magnificationgesturemechanism_introduce
Introduction to the magnifying gesture mechanism in the Android system accessibility (magnification Gesture mechanism)
