包含ViewPager的ListView项

Question

我有一个listview，每行都有viewpager。

<android.support.v4.view.ViewPager
    android:id="@+id/csp_main_imageview_pager"
    android:layout_width="fill_parent"
    android:layout_height="@dimen/image_max_height"
    android:layout_marginBottom="@dimen/default_small"
    android:layout_marginLeft="@dimen/default_small"
    android:layout_marginRight="@dimen/default_small" />

这是每行xml的一部分。

@Override
    public View getView(int position, View convertView, ViewGroup parent){
        if (convertView == null){
            convertView = inflater.inflate(R.layout.container_post, null);
        }
        ...
        ViewPager imageViewPager = (ViewPager)convertView
                .findViewById(R.id.main_imageview_pager);
        imageViewPager.setId(position + getCount());
        if (row should have image){
            imageViewPager.setVisibility(View.VISIBLE);
            imageViewPager.setAdapter(new ImageAdapter(getActivity()
                    .getSupportFragmentManager(),
                    post.getPhotos()));
        } else {
            imageViewPager.setVisibility(View.GONE);
        }
        return convertView;
    }

这是获取listview行的代码的一部分

private class ImageAdapter extends FragmentStatePagerAdapter {

    ArrayList<String> photos;

    public ImageAdapter(FragmentManager fm, ArrayList<String> photos) {
        super(fm);
        this.photos = photos;
    }

    @Override
    public Fragment getItem(int i) {
        Fragment fragment = new ImageFragment();
        Bundle args = new Bundle();
        args.putString(ImageFragment.ARG_IMAGE_LINK, Requests.SERVER_ADDRESS + photos.get(i));
        fragment.setArguments(args);

        return fragment;
    }

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

    @Override
    public CharSequence getPageTitle(int position) {
        return "";
    }
}

这是我用于viewpager的适配器。

ImageFragment只是膨胀视图，它只是imageview并将图像加载到其上，并添加了一些onclicklistener。

我尝试了在谷歌上搜索过的几个代码，但每个代码都创建了至少一个例外。

当我删除

if (convertView == null)

条件，它工作正常，但滚动非常不平滑， 我正在尝试重用膨胀的视图。 有什么建议吗？

编辑：

07-27 16:54:21.379  29762-29762/com.onthego.onthego E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.onthego.onthego, PID: 29762
java.lang.NullPointerException
        at com.onthego.onthego.main.ShareListFragment$ShareListAdapter.getView(ShareListFragment.java:161)
        at android.widget.AbsListView.obtainView(AbsListView.java:2712)
        at android.widget.ListView.makeAndAddView(ListView.java:1811)
        at android.widget.ListView.fillSpecific(ListView.java:1348)
        at android.widget.ListView.layoutChildren(ListView.java:1619)
        at android.widget.AbsListView.onLayout(AbsListView.java:2563)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.support.v7.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:502)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2356)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2069)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6637)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:814)
        at android.view.Choreographer.doCallbacks(Choreographer.java:614)
        at android.view.Choreographer.doFrame(Choreographer.java:584)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:800)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:146)
        at android.app.ActivityThread.main(ActivityThread.java:5602)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
        at dalvik.system.NativeStart.main(Native Method)

这是我滚动列表视图时得到的结果。 和文件的第161行是

imageViewPager.setId(position + getCount());

当我从另一项活动

回来时我得到的另一个例外

07-27 16:54:21.379  29762-29762/com.onthego.onthego E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.onthego.onthego, PID: 29762
java.lang.NullPointerException
        at com.onthego.onthego.main.ShareListFragment$ShareListAdapter.getView(ShareListFragment.java:161)
        at android.widget.AbsListView.obtainView(AbsListView.java:2712)
        at android.widget.ListView.makeAndAddView(ListView.java:1811)
        at android.widget.ListView.fillSpecific(ListView.java:1348)
        at android.widget.ListView.layoutChildren(ListView.java:1619)
        at android.widget.AbsListView.onLayout(AbsListView.java:2563)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.support.v7.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:502)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
        at android.view.View.layout(View.java:15762)
        at android.view.ViewGroup.layout(ViewGroup.java:4867)
        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2356)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2069)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6637)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:814)
        at android.view.Choreographer.doCallbacks(Choreographer.java:614)
        at android.view.Choreographer.doFrame(Choreographer.java:584)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:800)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:146)
        at android.app.ActivityThread.main(ActivityThread.java:5602)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
        at dalvik.system.NativeStart.main(Native Method)