额外的静态背景，顶部有正确的可滚动网格视图

Question

我在片段中有一个图像适配器我在Image Adapter中有以下代码：

public class ImageAdapter extends BaseAdapter {
    private Context mContext;

    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {
            // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(185, 185));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

    // references to our images
    private Integer[] mThumbIds = {
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_6, R.drawable.sample_7,
            R.drawable.sample_0, R.drawable.sample_1,
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_6, R.drawable.sample_7,
            R.drawable.sample_0, R.drawable.sample_1,
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_6, R.drawable.sample_7
    };
}

和片段的onCreateView如下：

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        final View rootview=inflater.inflate(R.layout.fragment_movies, container, false);;

        GridView gridview = (GridView) rootview.findViewById(R.id.moviesgrid);
        gridview.setAdapter(new ImageAdapter(getActivity()));

        gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View v,
                                    int position, long id) {
                Toast.makeText(getActivity(), "" + position,
                        Toast.LENGTH_SHORT).show();
            }
        });

        return rootview;
}

现在，当我运行项目时，它会根据需要显示可滚动网格，但它也会在可滚动网格中显示的相同图像的后视图中显示静态网格。你能指出那些额外的背景来自哪里吗？

编辑1以添加XML文件：

请在下面查看主要活动的XML：

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/fragment"
    android:name="com.example.android.popularmovies.PopularMoviesFragment"
    tools:layout="@layout/fragment_movies"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

请在下面查看XML for Fragment：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity$PPopularMoviesFragment"
    android:id="@+id/fragment_main">
    <GridView xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/moviesgrid"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:columnWidth="145dp"
        android:numColumns="auto_fit"
        android:verticalSpacing="1dp"
        android:horizontalSpacing="1dp"
        android:stretchMode="columnWidth"
        android:gravity="center"/>

</FrameLayout>

我附上了我面临的问题的截图。感谢