Call removeView() on the child's parent first
First a little background:
I have a layout inside a scrollview. At first, when the user scrolls on the screen, the scrollview scrolls. However, after a certain amount of scroll, I was to disable the scroll on the scroll view the move the "scroll focus" onto a webview inside the child layout. This way, the scrollview sticks and all the scroll events go to the webview inside it.
So, for a solution, when the scroll threshold is reached, I remove the child layout from the scrollview and put it in scrollview's parent.(And make the scrollview invisible).
// Remove the child view from the scroll view
scrollView.removeView(scrollChildLayout);
// Get scroll view out of the way
scrollView.setVisibility(View.GONE);
// Put the child view into scrollview's parent view
parentLayout.addView(scrollChildLayout);
General Idea: (-> means contains)
Before: parentlayout -> scrollview -> scrollChildLayout
After : parentLayout -> scrollChildLayout
The above code is giving me this exception:
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
at android.view.ViewGroup.addViewInner(ViewGroup.java:1976)
at android.view.ViewGroup.addView(ViewGroup.java:1871)
at android.view.ViewGroup.addView(ViewGroup.java:1828)
at android.view.ViewGroup.addView(ViewGroup.java:1808)
Do you know what's going on? I am clearly calling removeView on the parent.
Solution:
((ViewGroup)scrollChildLayout.getParent()).removeView(scrollChildLayout);
//scrollView.removeView(scrollChildLayout);
Use the child element to get a reference to the parent. Cast the parent to a ViewGroup so that you get access to the removeView method and use that.
Thanks to @Dongshengcn for the solution
Try remove scrollChildLayout from its parent view first?
scrollview.removeView(scrollChildLayout)
Or remove all the child from the parent view, and add them again.
scrollview.removeAllViews()
在onCreate中使用activity或在onCreateView中使用fragment。
if (view != null) {
ViewGroup parent = (ViewGroup) view.getParent();
if (parent != null) {
parent.removeView(view);
}
}
try {
view = inflater.inflate(R.layout.fragment_main, container, false);
} catch (InflateException e) {
}