viewpager 点击事件的响应

如何在viewpager 中的主Activity中得到其他页面的Button

public class MainActivity extends Activity {
private LinearLayout indexLayout;
private ImageView[] indexViews=new ImageView[4];
private ViewPager vp;
private View[] views=new View[4];
private Button btn3;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initIndex();

    vp=(ViewPager)findViewById(R.id.viewPager);
    views[0]=getLayoutInflater().inflate(R.layout.page1, null);
    views[1]=getLayoutInflater().inflate(R.layout.page2, null);
    views[2]=getLayoutInflater().inflate(R.layout.page3, null);
    views[3]=getLayoutInflater().inflate(R.layout.page4, null);

    ViewPagerAdapter adapter=new ViewPagerAdapter();
    vp.setAdapter(adapter);
    ViewPager.OnPageChangeListener listener=new ViewPager.OnPageChangeListener() {

        public void onPageSelected(int arg0) {
            System.out.println("onPageSelected");
            for(ImageView iv:indexViews){
                iv.setBackgroundResource(R.drawable.present);
            }
            indexViews[arg0].setBackgroundResource(R.drawable.santa);
        }

        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onPageScrollStateChanged(int arg0) {
            // TODO Auto-generated method stub

        }
    };
    vp.setOnPageChangeListener(listener);
}
class ViewPagerAdapter extends PagerAdapter{
    public int getCount() {
        return views.length;
    }
    public boolean isViewFromObject(View arg0, Object arg1) {
        return arg0==arg1;
    }
    @Override
    public void destroyItem(View container, int position, Object object) {
        ((ViewPager)container).removeView(views[position]);
    }
    @Override
    public Object instantiateItem(View container, int position) {
        ((ViewPager)container).addView(views[position]);
        return views[position];
    }

}

private void initIndex() {
    indexLayout=(LinearLayout)findViewById(R.id.indexLayout);
    for(int i=0;i<4;++i){
        indexViews[i]=new ImageView(this);
    }
    indexViews[0].setBackgroundResource(R.drawable.santa);
    indexViews[0].setLayoutParams(new LayoutParams(25,25));
    for(int i=1;i<=3;++i){
        indexViews[i].setBackgroundResource(R.drawable.present);
        indexViews[i].setLayoutParams(new LayoutParams(25,25));//width,height
    }
    for(int i=0;i<4;++i){
        indexLayout.addView(indexViews[i]);
    }

}
}

第一我想明确以下你的提问：
你的提问的意思应该是：在含有viewpager的activity中，如何获取不同pager的button实例。
如果你的问题是这样的话，我觉得有下面的解决办法，你可以尝试以下。
比如说，你想获取第一个pager里面的buton，你可以通过Button button=view[0].findViewById(R.id.buttonId);来获取Button.