同时获取绘制阶段后两个元素的宽度

Question

I have seen in the following answer: https://stackoverflow.com/a/24035591 of another post that to get the width of an element after the drawing phase I can do the following:

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.my_activity);
    View view1,view2;
    int width1,width2;´


        view1.post(() -> {
          width1=view1.getWidth();
                        }
}

What if I want to get the width of 2 elements (view1 and view2) instead of only one element as I am using both values in the same mathematical formula?

Should I do this? -->

view1.post(() -> {
              width1=view1.getWidth();
              width2=view2.getWidth();
                 formula(width1,width2);
                            }

Or should I do this(I don't know if it is okay to put a runnable inside another runnable) -->

view1.post(() -> {
              width1=view1.getWidth();
              view2.post(() -> {
               width2=view2.getWidth();
               formula(width1,width2);

               }
                            }

I can't do the following as I need both width's to be used in the same formula:

view1.post(() -> {
              width1=view1.getWidth();
                            }
view2.post(() -> {
              width2=view2.getWidth();
                            }

Both of the possibilities are working, but I would like to know which one is better or if there is another option to get both width's as I need them together as I am using them in one mathematical formula.

Note that formula(x,y) will use both width's to setMargins of another element:

TextView text1;
formula(x,y){
int z = x + y;
    ConstraintLayout.LayoutParams params =(ConstraintLayout.LayoutParams) text1.getLayoutParams();
    params.setMargins(0,z,0,0);
    text1.setLayoutParams(params);
}

Answer 1

Please see the activity lifecycle here: https://developer.android.com/guide/components/activities/activity-lifecycle .

The drawing is already over when the onStart() method is called. So you can directly call view1.getWidth() and view2.getWidth() inside this method, without using the post() call.