Question

我在DialogFragment中有一个RecyclerView。对话框片段和recyclerview都显示，但是当recyclerview超出视图容量时，它不会滚动。

    ?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:tag="FoodMenuTag"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.example.android.cop1803.MainActivity">

    <View
    android:id="@+id/divider3"
    android:layout_width="1184dp"
    android:layout_height="1dp"
    android:layout_marginTop="@dimen/MarginTop_PDF_dividers"
    android:layout_marginBottom="@dimen/MarginTop_PDF_dividers"
    android:background="?android:attr/listDivider"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/kCal"
    tools:layout_editor_absoluteX="8dp" />

        <com.example.android.cop1803.MyRecyclerView
        android:id="@+id/recycler_menuview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"
        app:layout_constraintTop_toBottomOf="@id/divider3"
    />

这是我的对话框片段：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.recyclerview_menu, container, false);
    mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_menuview);
    return view;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    Bundle args = getArguments();
    if(args != null) {
        cartList = args.getParcelableArrayList("key");
    MenuDialogFragmentAdapter adapter = new 
    MenuDialogFragmentAdapter(this.getActivity(), cartList);
    mRecyclerView.setHasFixedSize(true);
    mRecyclerView.setAdapter(adapter);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
   }
}
@Override
public void onResume() {
    // Get existing layout params for the window
    ViewGroup.LayoutParams params = getDialog().getWindow().getAttributes();
    // Assign window properties to fill the parent
    params.width = WindowManager.LayoutParams.MATCH_PARENT;
    params.height = WindowManager.LayoutParams.MATCH_PARENT;
    getDialog().getWindow().setAttributes((android.view.WindowManager.LayoutParams) params);
    // Call super onResume after sizing
    super.onResume();}

非常感谢您提供帮助以使其正常工作。

谢谢

吉姆

Answer 1

事实证明，我并没有考虑回收者视图的整个高度。因此它实际上正在工作，但是高度将其扩展到了底部边界之外。一旦我对高度进行了一些调整。这是所使用的XML。

<com.example.android.cop1803.MyRecyclerView
        android:id="@+id/recycler_menuview"
        android:layout_width="match_parent"
        android:layout_height="350dp"
        android:layout_marginStart="8dp"
        android:layout_marginBottom="8dp"
        android:scrollbars="vertical"
        app:layout_constraintVertical_bias="0.01"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/divider3" />

我不喜欢将高度设为固定值，因此很可能会通过代码进行更改。谢谢，吉姆

Answer 2

尝试将嵌套滚动添加到recyclerview中，看看其是否有效。

recyclerView.setNestedScrollingEnabled(true);

DialogFragment中的RecyclerView不滚动

2 个答案: