//主Activity在获取到其view还没放进适配器里的时候进行更改

​ViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.frame);
    radioButton1.setBackgroundResource(R.drawable.ms1);
    LayoutInflater lf = getLayoutInflater().from(this);
    view1=lf.inflate(R.layout.food,null);
    /***
     * 为ViewPager的子页面控件进行监听
     */
    view1.findViewById(R.id.imageButton01).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(MainActivity.this,FoodActivity.class);
            startActivity(intent);
        }
    });
    view2=lf.inflate(R.layout.menu,null);
    view3=lf.inflate(R.layout.recommend,null);
    view4=lf.inflate(R.layout.my,null);
    List<View> list = new ArrayList<View>();
    list.add(view1);

    list.add(view2);
    list.add(view3);
    list.add(view4);

    MyViewPagerAdapter myViewPagerAdapter=new MyViewPagerAdapter(list);