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[英]SmoothScrollTo item in RecyclerView inside NestedScrollView
[英]Last item in recyclerview (inside a nestedscrollview) is cut, landscape orientation cuts the viewpager
我在 CoordinatorLayout 中有一個滾動 AppBarLayout,我在第一個布局中包含了另一個布局,其中有一個 NestedScrollView、RecyclerView 和一些其他視圖。
我在這個布局中遇到了幾個問題。
活動中沒有平滑滾動,在 RecyclerView 中它平滑滾動。
RecyclerView 中的最后一項是從底部剪下來的。
當我改變方向時,它會完全切斷底部的 ViewPager。 因為我不能再滾動了。
我還在下面附上了主布局和子布局。
活動細節.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>
電影細節.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 活動中,“viewPager”是我加載RecyclerView 的地方。
它是一個簡單的 RecyclerView 我在下面添加了適配器和 RecyclerView 的代碼。
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" />
下面是 RecyclerView 中每一項的布局。
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>
下面是適配器類的代碼。
拖車適配器.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;
}
}
在我的情況下,此問題已解決,當 recyclerView 住院時,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" />
我不得不在單獨的 LinearLayout 中分離出 TabLayout 和 ViewPager,然后它才能正常工作。
以下是修改后的布局供參考:
<?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,所以上面的布局是在包含 NestedScrollView 的 FrameLayout 中顯示的布局,並且僅在平板電腦大屏幕設備的情況下使用。
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>
我認為您有問題,因為導航欄與您的應用布局重疊。 您需要設置導航欄,拋出主要主題或活動樣式
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