android - fragment 内的 ScrollView 不滚动

Question

在我的 Activity 中，我有一个 FrameLayout，它应该用作 fragment 的容器。

在我的 fragment 中，我得到了一个没有响应的 ScrollView。 ScrollView 包含 TextView 集 android:layout_height="wrap_content"，我的 java 代码中的文本明显长于 的大小 ScrollView 。

我的 fragment 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:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <ImageView
            android:layout_width="@dimen/bookview.imageWidth"
            android:layout_height="250dp"
            android:id="@+id/bookView.image"/>
        <TextView
            android:textSize="@dimen/custom_book_text"
            android:layout_height="wrap_content"
            android:layout_width="fill_parent"
            android:layout_toEndOf="@id/bookView.image"
            android:id="@+id/bookView.name"/>
        <TextView
            android:textSize="@dimen/custom_book_text"
            android:layout_height="wrap_content"
            android:layout_width="fill_parent"
            android:layout_toEndOf="@id/bookView.image"
            android:layout_below="@id/bookView.name"
            android:id="@+id/bookView.author"/>
        <TextView
            android:textSize="@dimen/custom_book_text"
            android:layout_height="wrap_content"
            android:layout_width="fill_parent"
            android:layout_toEndOf="@id/bookView.image"
            android:layout_below="@id/bookView.author"
            android:id="@+id/bookView.pages"/>
        <TextView
            android:textSize="@dimen/custom_book_text"

            android:layout_height="wrap_content"
            android:layout_width="fill_parent"
            android:layout_toEndOf="@id/bookView.image"
            android:layout_below="@id/bookView.pages"
            android:id="@+id/bookView.category"/>
        <TextView
            android:textSize="@dimen/custom_book_text"
            android:layout_height="wrap_content"
            android:layout_width="fill_parent"
            android:layout_toEndOf="@id/bookView.image"
            android:layout_below="@id/bookView.category"
            android:id="@+id/bookView.publishingDate"/>
    </RelativeLayout>
    <ScrollView
        android:layout_height="200dp"
        android:layout_width="match_parent"
        android:layout_gravity="end">
        <TextView
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:textSize="@dimen/custom_book_text"
            android:id="@+id/bookView.description"/>
    </ScrollView>
</LinearLayout>

Activity 的xml:

    <android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/use.drawer">

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

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="@dimen/user_custom_book_height"
            android:id="@+id/user.customBookContainer"/>
        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="fill_parent"
            android:id="@+id/user.container"/>
    </LinearLayout>

    <include
        layout="@layout/navigation_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"/>
</android.support.v4.widget.DrawerLayout>

---

我使用 FrameLayout 是因为我想在运行时更改那个区域的 fragment 。更好的主意？我喜欢听。

我试图降低 ScrollView 的高度。我的 fragment java 代码:

public class BookView extends Fragment {

    private Bitmap bitmap;
    private String name;

    public static BookView newInstance(String book,Bitmap bitmap) {

        Bundle args = new Bundle();
        BookView fragment = new BookView();
        fragment.bitmap = bitmap;
        fragment.name = book;
        fragment.setArguments(args);
        return fragment;
    }

    public BookView() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v = inflater.inflate(R.layout.fragment_book_view, container, true);
        Backend backend = BackendFactory.getInstance();
        try {
            Book b = backend.readBook(name);
            TextView textView = (TextView)v.findViewById(R.id.bookView_name);
            textView.setText(b.getBookName());
            textView = (TextView)v.findViewById(R.id.bookView_author);
            textView.setText(b.getAuthor());
            textView = (TextView)v.findViewById(R.id.bookView_category);
            textView.setText(b.getCategory().name());
            textView = (TextView)v.findViewById(R.id.bookView_description);
            textView.setText(b.getDescription());
            textView = (TextView)v.findViewById(R.id.bookView_pages);
            textView.setText(Integer.toString(b.getPages()));
            textView = (TextView)v.findViewById(R.id.bookView_publishingDate);
            textView.setText(b.getPublishingDate());
            final ImageView imageView = (ImageView)v.findViewById(R.id.bookView_image);
            if(bitmap != null){
                imageView.setImageBitmap(bitmap);
            } else{
                ImageLoader imageLoader = new ImageLoader();
                imageLoader.setListener(new ImageLoader.ImageTaskListener() {
                    @Override
                    public void onActionEnd() {}

                    @Override
                    public void onImageDownload(Bitmap bitmap) {
                        imageView.setImageBitmap(bitmap);
                    }
                });
                imageLoader.execute(b.getImage());
            }
        }
        catch (Exception e) {
            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
            builder.setMessage(e.getMessage());
            builder.create().show();
        }

        return inflater.inflate(R.layout.fragment_book_view, container, false);
    }
}

imageLoader 是我写的一个类，它扩展了 AsyncTask 以从 url 下载图像并在准备好时更新 UI。

Answer 1

我认为此 fragment 的其他部分(TextViews 和 ImageViews)充满了屏幕的所有区域，而 ScrollView 呈现在屏幕外。我建议您将所有布局放在 ScrollView 中。像这样:

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

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

    <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

        <ImageView
                android:id="@+id/bookView.image"
                android:layout_width="@dimen/bookview.imageWidth"
                android:layout_height="250dp"/>

        <TextView
                android:id="@+id/bookView.name"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_toEndOf="@id/bookView.image"
                android:textSize="@dimen/custom_book_text"/>

        <TextView
                android:id="@+id/bookView.author"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/bookView.name"
                android:layout_toEndOf="@id/bookView.image"
                android:textSize="@dimen/custom_book_text"/>

        <TextView
                android:id="@+id/bookView.pages"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/bookView.author"
                android:layout_toEndOf="@id/bookView.image"
                android:textSize="@dimen/custom_book_text"/>

        <TextView
                android:id="@+id/bookView.category"

                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/bookView.pages"
                android:layout_toEndOf="@id/bookView.image"
                android:textSize="@dimen/custom_book_text"/>

        <TextView
                android:id="@+id/bookView.publishingDate"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/bookView.category"
                android:layout_toEndOf="@id/bookView.image"
                android:textSize="@dimen/custom_book_text"/>
    </RelativeLayout>

    <TextView
            android:id="@+id/bookView.description"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="@dimen/custom_book_text"/>

</LinearLayout>