自定义splash导航器，选中的点变大

mNumLayout = (LinearLayout) findViewById(R.id.ll_indicater);for (int i = 0; i < mImages.length; i++) {    ImageView bt = new ImageView(this);    bt.setLayoutParams(new ViewGroup.LayoutParams((int) AbViewUtil.dip2px(this, 17),            ViewGroup.LayoutParams.WRAP_CONTENT));    bt.setImageResource(R.drawable.indicator);    mNumLayout.addView(bt);}pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {    @Override    public void onPageScrolled(int position, float positionOffset,                               int positionOffsetPixels) {        if (mPreSelectedBt != null) {            mPreSelectedBt.setImageResource(R.drawable.indicator);        }        ImageView currentBt = (ImageView) mNumLayout.getChildAt(position);        currentBt.setImageResource(mIndicatorImages[position]);        mPreSelectedBt = currentBt;    }    @Override    public void onPageSelected(int position) {    }    @Override    public void onPageScrollStateChanged(int state) {    }});