mTextView=new TextView(mActivity);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(60, 30);
mTextView.setLayoutParams(layoutParams);
mTextView.setTextColor(Color.parseColor("#03A9F4"));
mTextView.setVisibility(View.GONE);
dotsLinearLayout.addView(mTextView);

public void setCurrentNumber(int number){
  boolean isContain=false;
  for(int i=0;i<dotsLinearLayout.getChildCount();i++){
   View v=dotsLinearLayout.getChildAt(i);
   if (v instanceof TextView){
     isContain=true;
   }
  }
  if (isContain == false){
   setMTextView();
  }
  if (myViewPagerAdapter!=null){
   int current=number+myViewPager.getCurrentItem()*4;
   mTextView.setText(current+"/"+myViewPagerAdapter.getCount()*4);
   mTextView.setVisibility(View.VISIBLE);
   for (int i = 0; i < dotViews.size(); i++) {
      dotViews.get(i).setVisibility(View.GONE);
   }
  }
}