实现curson 选项卡游标随viewpager移动

@Override

    public void onPageScrollStateChanged(int arg0) {

        // TODO Auto-generated method stub

        

    }

    @Override

    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        setCursorPositin(position, positionOffset, positionOffsetPixels);
    }

    private void setCursorPositin(int position,float positionOffset, int positionOffsetPixels){

        int width=getWindowManager().getDefaultDisplay().getWidth();

      int curson_width = BitmapFactory.decodeResource(getResources(), R.drawable.mingxi_xiazhi).getWidth();

        LayoutParams params = new LayoutParams(curson_width, LayoutParams.WRAP_CONTENT);

        params.setMargins(position*width/3+positionOffsetPixels/3+(width/3-ico_width)/2, 0, 0, 0);

        cursor.setLayoutParams(params );

   }