Question

我在CoordinatorLayout中有一个滚动的AppBarLayout，我在第一个布局中包含另一个布局，它有一个NestedScrollView，RecyclerView和其他一些视图。

我在这个布局中遇到了一些问题。

活动中没有平滑滚动，在RecyclerView内滚动顺利。
RecyclerView中的最后一项是从底部剪切的。
当我更改方向时，它会完全切断底部的ViewPager。因为我不能再滚动了。

我还附上了下面的主要布局和子布局。

activity_detail.xml

   <?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:fitsSystemWindows="true"
    tools:context=".DetailActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.design.widget.CollapsingToolbarLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:id="@+id/iv_movie_backdrop"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:contentDescription="@string/str_movie_backdrop_image"
                android:scaleType="fitXY" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin" />

        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/movie_details" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        app:layout_anchor="@id/app_bar"
        app:layout_anchorGravity="bottom|end"
        app:srcCompat="@drawable/ic_favorite_black_24dp" />

</android.support.design.widget.CoordinatorLayout>

movie_details.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView 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:fillViewport="true"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.CardView
            android:id="@+id/cv_poster_image"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="10dp"
            android:layout_marginTop="10dp"
            android:elevation="@dimen/card_elevation"
            app:cardCornerRadius="8dp"
            app:cardUseCompatPadding="true"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <ImageView
                android:id="@+id/iv_movie_poster"
                android:layout_width="150dp"
                android:layout_height="200dp"
                android:contentDescription="@string/str_movie_poster"
                android:padding="@dimen/poster_padding"
                android:scaleType="fitXY"
                android:src="@drawable/not_found" />
        </android.support.v7.widget.CardView>

        <TextView
            android:id="@+id/tv_movie_title"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="70dp"
            android:layout_marginStart="10dp"
            android:padding="@dimen/poster_padding"
            android:textAppearance="?android:textAppearanceLarge"
            android:textColor="@android:color/black"
            android:textStyle="bold"
            app:layout_constraintLeft_toRightOf="@+id/cv_poster_image"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="@+id/cv_poster_image"
            tools:text="Spider Man and Iron Man" />


        <TextView
            android:id="@+id/tv_release_date"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:drawablePadding="@dimen/poster_padding"
            android:drawableStart="@drawable/ic_date_range_black_24dp"
            android:gravity="start"
            android:padding="@dimen/poster_padding"
            android:textAppearance="?android:textAppearanceSmall"
            android:textColor="@android:color/black"
            app:layout_constraintLeft_toLeftOf="@+id/tv_movie_title"
            app:layout_constraintTop_toBottomOf="@+id/tv_movie_title"
            tools:text="March, 2017" />

        <TextView
            android:id="@+id/tv_rating"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:drawablePadding="@dimen/poster_padding"
            android:drawableStart="@drawable/ic_star_black_24dp"
            android:gravity="start"
            android:padding="@dimen/poster_padding"
            android:textAppearance="?android:textAppearanceSmall"
            android:textColor="@android:color/black"
            app:layout_constraintLeft_toLeftOf="@+id/tv_release_date"
            app:layout_constraintTop_toBottomOf="@+id/tv_release_date"
            tools:text="7.1" />

        <TextView
            android:id="@+id/tv_genre"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:padding="@dimen/poster_padding"
            android:textAppearance="?android:textAppearanceSmall"
            android:textColor="@android:color/black"
            android:textStyle="italic"
            app:layout_constraintLeft_toLeftOf="@+id/tv_rating"
            app:layout_constraintTop_toBottomOf="@+id/tv_rating"
            tools:text="Horror | Comedy | Drama" />

        <android.support.design.widget.TabLayout
            android:id="@+id/sliding_tabs"
            style="@style/CategoryTab"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="10dp"
            android:layout_marginStart="10dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/cv_poster_image"
            app:tabGravity="fill" />

        <android.support.v4.view.ViewPager
            android:id="@+id/viewPager"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="10dp"
            android:layout_marginStart="10dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/sliding_tabs" />

    </android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>

在movie_details.xml活动中，＆＃34; viewPager＆＃34;是我加载RecyclerView的地方。

它是一个简单的RecyclerView我已经为适配器和下面的RecyclerView添加了代码。

movie_trailers_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rv_movie_trailer_list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

以下是RecyclerView中每个项目的布局。

movie_trailer_item.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:elevation="@dimen/card_elevation"
    card_view:cardCornerRadius="8dp"
    card_view:cardUseCompatPadding="true">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/iv_trailer_poster"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:contentDescription="@string/str_trailer_poster"
            android:scaleType="fitXY"
            android:src="@drawable/not_found" />

        <TextView
            android:id="@+id/tv_trailer_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:padding="@dimen/detail_activity_text_padding"
            android:textAppearance="?android:textAppearanceSmall"
            android:textColor="@android:color/black"
            tools:text="This Trailer Is Awesome" />

    </LinearLayout>

</android.support.v7.widget.CardView>

以下是适配器类的代码。

TrailerAdapter.java

public class MovieTrailersFragment extends Fragment {
    public static final String MOVIE_TRAILERS_KEY = "trailer";

    public MovieTrailersFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.movie_trailers_fragment, container, false);
        savedInstanceState = this.getArguments();
        List<MovieTrailer> movieTrailerList = (List<MovieTrailer>) savedInstanceState.getSerializable(MOVIE_TRAILERS_KEY);
        RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.rv_movie_trailer_list);
        TrailerAdapter trailerAdapter = new TrailerAdapter(view.getContext());
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(view.getContext(),LinearLayoutManager.VERTICAL,false);
        recyclerView.setLayoutManager(linearLayoutManager);
        recyclerView.setNestedScrollingEnabled(true);
        recyclerView.setHasFixedSize(true);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setAdapter(trailerAdapter);
        trailerAdapter.prepareMovieTrailers(movieTrailerList);
        return view;
    }

}

Answer 1

在我的情况下，这个问题解决了，当 recyclerView 住院时，在 layout main 的 layout_height 中添加 0dp，以防在片段上使用

<androidx.fragment.app.FragmentContainerView
        android:id="@+id/container"
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:defaultNavHost="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintVertical_bias="0.0"
        app:navGraph="@navigation/navigation" />

Answer 2

我必须在单独的LinearLayout中将TabLayout和ViewPager分开，然后才能正常工作。

以下是修改后的布局供参考：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.CardView
            android:id="@+id/cv_poster_image"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="10dp"
            android:layout_marginTop="10dp"
            android:elevation="@dimen/card_elevation"
            app:cardCornerRadius="8dp"
            app:cardUseCompatPadding="true"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <ImageView
                android:id="@+id/iv_movie_poster"
                android:layout_width="150dp"
                android:layout_height="200dp"
                android:contentDescription="@string/str_movie_poster"
                android:padding="@dimen/poster_padding"
                android:scaleType="fitXY"
                android:src="@drawable/not_found" />
        </android.support.v7.widget.CardView>

        <TextView
            android:id="@+id/tv_movie_title"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="60dp"
            android:layout_marginStart="10dp"
            android:padding="@dimen/poster_padding"
            android:textAppearance="?android:textAppearanceLarge"
            android:textColor="@android:color/black"
            android:textStyle="bold"
            app:layout_constraintLeft_toRightOf="@+id/cv_poster_image"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="@+id/cv_poster_image"
            tools:text="Spider Man and Iron Man" />


        <TextView
            android:id="@+id/tv_release_date"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:drawablePadding="@dimen/poster_padding"
            android:drawableStart="@drawable/ic_date_range_black_24dp"
            android:gravity="start|center_vertical"
            android:padding="@dimen/poster_padding"
            android:textAppearance="?android:textAppearanceSmall"
            android:textColor="@android:color/black"
            app:layout_constraintLeft_toLeftOf="@+id/tv_movie_title"
            app:layout_constraintTop_toBottomOf="@+id/tv_movie_title"
            tools:text="March, 2017" />

        <TextView
            android:id="@+id/tv_rating"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:drawablePadding="@dimen/poster_padding"
            android:drawableStart="@drawable/ic_star_black_24dp"
            android:gravity="start|center_vertical"
            android:padding="@dimen/poster_padding"
            android:textAppearance="?android:textAppearanceSmall"
            android:textColor="@android:color/black"
            app:layout_constraintLeft_toLeftOf="@+id/tv_release_date"
            app:layout_constraintTop_toBottomOf="@+id/tv_release_date"
            tools:text="7.1" />

        <TextView
            android:id="@+id/tv_genre"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:padding="@dimen/poster_padding"
            android:textAppearance="?android:textAppearanceSmall"
            android:textColor="@android:color/black"
            android:textStyle="italic"
            app:layout_constraintLeft_toLeftOf="@+id/tv_rating"
            app:layout_constraintTop_toBottomOf="@+id/tv_rating"
            tools:text="Horror | Comedy | Drama" />

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab_tab_layout"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/fab_margin"
            android:layout_marginRight="10dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.0"
            app:srcCompat="@drawable/ic_favorite_border_black_24dp" />

    </android.support.constraint.ConstraintLayout>

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

        <android.support.design.widget.TabLayout
            android:id="@+id/sliding_tabs"
            style="@style/CategoryTab"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginEnd="10dp"
            android:layout_marginStart="10dp"
            android:layout_marginTop="10dp"
            app:tabGravity="fill" />

        <android.support.v4.view.ViewPager
            android:id="@+id/viewPager"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginEnd="10dp"
            android:layout_marginStart="10dp"
            android:layout_marginTop="10dp" />

    </LinearLayout>

</LinearLayout>

更新

我正在使用片段，因此上面的布局布局显示在FrameLayout内，其中包含NestedScrollView，仅用于Tablet大屏幕设备。

大屏幕中上述片段的容器：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <FrameLayout
        android:id="@+id/detail_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</android.support.v4.widget.NestedScrollView>

Answer 3

我认为您遇到了问题，因为导航栏与您的应用布局重叠。您需要设置导航栏，抛出主题或活动样式

Recyclerview中的最后一项（在嵌套的scrollview内）被剪切，横向方向会切断viewpager

3 个答案: