Android 我的代码有什么问题（片段库）

我是安卓新手。。 有人能告诉我我的代码有什么问题吗？我想把画廊变成碎片。当我在设备上安装apk文件时，程序可以运行，但在该片段中，我看到的是白色屏幕而不是多媒体资料。请帮助我：

那是我的片段类 这就是我对这个片段的布局

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Getview方法有问题吗

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    if (convertView == null) {

        holder = new ViewHolder();

        imageView = new ImageView(this.context);

        imageView.setPadding(3, 3, 3, 3);

        convertView = imageView;

        holder.imageView = imageView;

        convertView.setTag(holder);

    } else {

        holder = (ViewHolder) convertView.getTag();
    }

    holder.imageView.setImageDrawable(plotsImages.get(position));

    holder.imageView.setScaleType(ImageView.ScaleType.FIT_XY);
    holder.imageView.setLayoutParams(new Gallery.LayoutParams(150, 90));

    return imageView;
}

private static class ViewHolder {
    ImageView imageView;
}

<LinearLayout 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"
    tools:context="{relativePackage}.${activityClass}"
    android:orientation="vertical" >

    <Gallery
        android:id="@+id/gallery1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <ImageView
        android:id="@+id/image1"
        android:layout_width="215dp"
        android:layout_height="315dp"
        android:layout_gravity="center_horizontal"
        android:background="#cfcfcf"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:src="@drawable/car1"
        android:contentDescription="@null" />
</LinearLayout>

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    if (convertView == null) {

        holder = new ViewHolder();

        imageView = new ImageView(this.context);

        imageView.setPadding(3, 3, 3, 3);

        convertView = imageView;

        holder.imageView = imageView;

        convertView.setTag(holder);

    } else {

        holder = (ViewHolder) convertView.getTag();
    }

    holder.imageView.setImageDrawable(plotsImages.get(position));

    holder.imageView.setScaleType(ImageView.ScaleType.FIT_XY);
    holder.imageView.setLayoutParams(new Gallery.LayoutParams(150, 90));

    return imageView;
}

private static class ViewHolder {
    ImageView imageView;
}