code: public void setSplitterPositionPercent(float position) {
          mSplitterPosition = Integer.MIN_VALUE;
          mSplitterPositionPercent = clamp(position, 0, 1);
          remeasure();
          notifySplitterPositionChanged(false);
      }
docs: Sets the current position of the splitter as a percentage of the layout.
  
  @param position the desired position of the splitter