code: public void setValue(float value) {
  		mBarPointerPosition = Math.round((mSVToPosFactor * (1 - value))
  				+ mBarPointerHaloRadius + (mBarLength / 2));
  		calculateColor(mBarPointerPosition);
  		mBarPointerPaint.setColor(mColor);
  		// Check whether the Saturation/Value bar is added to the ColorPicker
  		// wheel
  		if (mPicker != null) {
  			mPicker.setNewCenterColor(mColor);
  			mPicker.changeOpacityBarColor(mColor);
  		}
  		invalidate();
  	}
docs: Set the pointer on the bar. With the Value value.
  
  @param value float between 0 and 1