public boolean isViewCovered(final View view) {
View currentView = view;
Rect currentViewRect = new Rect();
boolean partVisible = currentView.getGlobalVisibleRect(currentViewRect);
boolean totalHeightVisible = (currentViewRect.bottom - currentViewRect.top) >= view.getMeasuredHeight();
boolean totalWidthVisible = (currentViewRect.right - currentViewRect.left) >= view.getMeasuredWidth();
boolean totalViewVisible = partVisible && totalHeightVisible && totalWidthVisible;
if (!totalViewVisible)//if any part of the view is clipped by any of its parents,return true
return true;
while (currentView.getParent() instanceof ViewGroup) {
ViewGroup currentParent = (ViewGroup) currentView.getParent();
if (currentParent.getVisibility() != View.VISIBLE)//if the parent of view is not visible,return true
return true;
int start = indexOfViewInParent(currentView, currentParent);
for (int i = start + 1; i < currentParent.getChildCount(); i++) {
Rect viewRect = new Rect();
view.getGlobalVisibleRect(viewRect);
View otherView = currentParent.getChildAt(i);
Rect otherViewRect = new Rect();
otherView.getGlobalVisibleRect(otherViewRect);
if (Rect.intersects(viewRect, otherViewRect))//if view intersects its older brother(covered),return true
return true;
}
currentView = currentParent;
}
return false;
}
private int indexOfViewInParent(View view, ViewGroup parent) {
int index;
for (index = 0; index < parent.getChildCount(); index++) {
if (parent.getChildAt(index) == view)
break;
}
return index;
}android view是否被覆盖
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