如何通过索引从ViewPager获取edittext的值

Question

我在ViewPager的不同页面上有一个图像和edittexts，并试图弄清楚如何通过页面的索引在页面上引用edittext（我想获得edittext onPageSelected的值）？

这是我的ViewPager和适配器的类：

public static ViewPager pager;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fr_image_pager, container, false);
         pager = (ViewPager) rootView.findViewById(R.id.pager);
        PageListener pageListener = new PageListener();
        pager.setOnPageChangeListener(pageListener);
        pager.setAdapter(new ImageAdapter());
        pager.setCurrentItem(getArguments().getInt(Constants2photo.Extra.IMAGE_POSITION, 0));
        return rootView;
    }
    private static class PageListener extends ViewPager.SimpleOnPageChangeListener {
        private int currentPage;

        @Override
        public void onPageSelected(int position) {
            //get value of editText1 here
            Log.i("TAG", "page selected " + position);
            currentPage = position;
        }
    }
    private class ImageAdapter extends PagerAdapter {

        private LayoutInflater inflater;

        ImageAdapter() {
            inflater = LayoutInflater.from(getActivity());
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            container.removeView((View) object);
        }

        @Override
        public int getCount() {
            return imageUrls.size();
        }

        @Override
        public Object instantiateItem(ViewGroup view, final int position) {
            View imageLayout = inflater.inflate(R.layout.item_pager_image, view, false);
            assert imageLayout != null;
            ImageView imageView = (ImageView) imageLayout.findViewById(R.id.imageFull);
            final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);

            ImageLoader.getInstance().displayImage(imageUrls.get(position).get("url"), imageView, options, new SimpleImageLoadingListener() {
                @Override
                public void onLoadingStarted(String imageUri, View view) {
                    spinner.setVisibility(View.VISIBLE);
                }

                @Override
                public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
                    String message = null;
                    switch (failReason.getType()) {
                        case IO_ERROR:
                            message = "Input/Output error";
                            break;
                        case DECODING_ERROR:
                            message = "Image can't be decoded";
                            break;
                        case NETWORK_DENIED:
                            message = "Downloads are denied";
                            break;
                        case OUT_OF_MEMORY:
                            message = "Out Of Memory error";
                            break;
                        case UNKNOWN:
                            message = "Unknown error";
                            break;
                    }
                    Toast.makeText(getActivity(), message, Toast.LENGTH_SHORT).show();

                    spinner.setVisibility(View.GONE);
                }

                @Override
                public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
                    spinner.setVisibility(View.GONE);

                }
            });
            Toast.makeText(getActivity(), "pos is: " + position, Toast.LENGTH_SHORT).show();
            view.addView(imageLayout, 0);
            return imageLayout;
        }

        @Override
        public boolean isViewFromObject(View view, Object object) {
            return view.equals(object);
        }

        @Override
        public void restoreState(Parcelable state, ClassLoader loader) {
        }

        @Override
        public Parcelable saveState() {
            return null;
        }
    }

item_pager_image.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="1dip"
    android:orientation="vertical">

    <ProgressBar
        android:id="@+id/loading"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center"
        android:visibility="gone" />
    <ImageView
        android:id="@+id/imageFull"
        android:src="@drawable/phone_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:adjustViewBounds="false"
        android:contentDescription="@string/descr_image"
        android:layout_weight = ".75"/>

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="18dp"
        android:text="Caption"
        android:textAppearance="?android:attr/textAppearanceMedium" />
    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="@string/optional"
        android:layout_marginTop="20dp" />


</LinearLayout>