Coordinate system of view

View The coordinate system of

Android Coordinate system

Android The coordinate system in the system takes the vertex in the upper left corner of the screen as the origin , The origin is... To the right X The positive direction of the axis , The origin is downward Y The positive direction of the axis . Use in touch events getRawX() and getRawY() The obtained coordinates are the coordinate values based on this coordinate system .
( notes ： raw raw , Translated here into The original , Get the original X coordinate , Get the original Y coordinate )

View Coordinate system

View relevant

• Related to his father's layout , Distance to parent layout
  • getTop()
  • getLeft()
  • getRight()
  • getBottom

MotionEvent relevant

• Related to itself
  • getX() Get the distance from the click event to the left of the control , Attempt coordinates
  • getY() Get the distance from the click event to the top edge of the control , Attempt coordinates
  • getRawX() Get the distance from the click event to the left of the whole screen , Absolute coordinates
  • getRawY() Get the distance from the click event to the top edge of the whole screen , Attempt coordinates

Reference blog

https://blog.csdn.net/rfgreeee/article/details/79087954