code: private void obtainDialogHeaderIcon(@NonNull final TypedArray typedArray) {
          int resourceId =
                  typedArray.getResourceId(R.styleable.DialogPreference_dialogHeaderIcon, -1);
  
          if (resourceId != -1) {
              setDialogHeaderIcon(resourceId);
          }
      }
docs: Obtains the icon of the header of the dialog, which is shown by the preference, from a
  specific typed array.
  
  @param typedArray
  The typed array, the icon should be obtained from, as an instance of the class {@link
  TypedArray}. The typed array may not be null