I am working on a fragment and I want to get the dimension of a layout
contained in the xml
fragment layout
.
When I try the code
RelativeLayout myLayout = view.findViewById(R.id.myLayout);
myLayout.getHeight();
it returns 0. I need these dimensions to put inside myLayout other objects.
I try to use:
myLayout.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener(){
@Override
public void onGlobalLayout() {
mHeight = myLayout.getHeight();
mWidth= myLayout.getWidth();
System.out.println("width: "+mWidth+" height: "+mHeight);
}
});
but this code is invoke a lot of time and I don't know exactly when it is execute.
I need these dimensions into public void onActivityCreated ()
method. Is it possible?
There's a cleaner solution to this, just use the View.post()
method on your fragment's root view, and you can call getMeasuredHeight()/getMeasuredWidth()
and get the actual values.
E.g.
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.myfragment, container, false);
root.post(new Runnable() {
@Override
public void run() {
// for instance
int height = root.getMeasuredHeight();
}
});
return root;
}
Very neat and tidy and no messy mucking about with the ViewTreeObserver
.
I've only tested this with android-23 devices, but the API has had this method since level 1.
Anyway, WFM.