如何在LinearLayout中获取视图坐标

Question

I have a LinearLayout which can have many child views. Child views are added programatically.

                                                      i need this distance
                                                    <---------------------->
--------------------------------wrapper ln----------------------------------
-                                             ...  cv4   cv3    cv2    cv1 -  
----------------------------------------------------------------------------

Wrapper ln gravity is setted to right, so every added child view putting right.

For example when I click to "cv4" i need to get the distance from the right side of wrapper linear layout.

Child views are of LinearLayout type.

Answer 1

You can call getWidth() on the parent LinearLayout and getLeft() on the dynamically added view to get the position from the right:

parent.getWidth() - c4.getLeft();

You can also hook onto a OnGlobalLayoutListener so you can get the co-ordinates every time it changes its dimensions:

parent.getViewTreeObserver().addOnGlobalLayoutListener(
     new ViewTreeObserver.OnGlobalLayoutListener() {
          public void onGlobalLayout() {
               int right = parent.getWidth() - c4.getLeft();
          }
     }