我需要一些建议。ViewPager只显示白色页面。我已经搜索了很多，但我无法找到我的情况下的解决方案。
我试着做一个简单的按钮，但是我得到了相同的输出。我认为这不是图像问题。这是我的代码。

public class IntroduceArticleFragment extends Fragment {

    View view;
    String depart;
    String path;
    int num;

    CustomPagerAdapter customPagerAdapter;
    ViewPager viewPager;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_introduce_article, container, false);
        view.setBackgroundColor(Color.WHITE);

        depart = getArguments().getString("depart");
        create();

        //customPagerAdapter = new CustomPagerAdapter(getActivity());
        viewPager = (ViewPager)view.findViewById(R.id.pager);
        viewPager.setAdapter(customPagerAdapter);

        return view;
    }

    void create(){
        DBHelper dbHelper = new DBHelper(getActivity());
        path = dbHelper.getContentsPath(depart);
        num = dbHelper.getNum(depart);

        customPagerAdapter = new CustomPagerAdapter(getActivity());
        customPagerAdapter.mResources = new int[num];
        for(int i=0;i<num;i++) {
            String uri = "@drawable/" + path + "_" + Integer.toString(i);
            int imageResource = getActivity().getResources().getIdentifier(uri, "drawabale", getActivity().getPackageName());
            customPagerAdapter.mResources[i] = imageResource;
        }
    }
}

public class CustomPagerAdapter extends PagerAdapter {
    Context mContext;

    public int[] mResources;

    public CustomPagerAdapter(Context context) {
        super();
        mContext = context;
    }

    @Override
    public int getCount() {
        return mResources.length;
    }

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

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        LayoutInflater mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View itemView = mLayoutInflater.inflate(R.layout.pager_item_0, container, false);

        ImageView imageView = (ImageView) itemView.findViewById(R.id.pagerimageView_0);
        imageView.setImageResource(mResources[position]);

        container.addView(itemView);

        return itemView;
    }

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

    @Override
    public void startUpdate(ViewGroup container) {
        super.startUpdate(container);
    }

    @Override
    public void finishUpdate(ViewGroup container) {
        super.finishUpdate(container);
    }
}

这是ArticleFragment的xml代码

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

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical" >

                <android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
                    android:id="@+id/pager"
                    android:layout_width="match_parent"
                    android:layout_height="0dp"
                    android:visibility="visible">
                </android.support.v4.view.ViewPager>

            </LinearLayout>
        </ScrollView>
    </LinearLayout>

这是XML代码

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

        <Button
            android:text="Button"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/button" />

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="fitCenter"
            android:id="@+id/pagerimageView_0" />
    </LinearLayout>