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