我有 Recyclerview
在 Coordinatorlayout
下> NestedScrollview
> ViewPager
和 ViewPager
有 3 个 fragment ,一个有图片库,在 Recyclerview
的帮助下工作.每当我尝试向上或向下滚动时,它根本不会滚动。我已经设置了photosRecycler.setNestedScrollingEnabled(false);
一旦我删除这条线,我就只能向下滚动,当我试图向上移动时,它会随着父 Nestedscrollview
向上移动.
我的布局管理器也将 StaggeredGrid 显示为 Grid 我需要获得这种布局
这是我的 Nestedscrollview 的父布局
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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:background="?android:attr/colorBackground"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<com.google.android.material.appbar.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:colorBackground">
<ImageView
android:layout_width="match_parent"
android:layout_height="500dp"
android:src="@color/custom_transparent_colorBlack"
android:scaleType="centerCrop"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="128dp"
android:layout_height="128dp"
app:layout_constraintBottom_toBottomOf="@+id/coverPhoto"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/coverPhoto"
app:layout_constraintVertical_bias="0.44"
tools:srcCompat="@tools:sample/avatars" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.core.widget.NestedScrollView
android:id="@+id/up_NestedScrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:overScrollMode="never"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="5dp"
android:paddingRight="5dp"
>
<com.google.android.material.tabs.TabLayout
android:id="@+id/tabItemes"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabPaddingBottom="0dp"
app:tabPaddingEnd="0dp"
app:tabPaddingStart="0dp"
app:tabPaddingTop="0dp"
app:tabIndicatorHeight="0dp"
app:tabMode="fixed"
app:tabTextColor="@color/black"
app:tabSelectedTextColor="@color/primary"
app:tabIndicatorColor="@color/primary_light">
<com.google.android.material.tabs.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="About" />
<com.google.android.material.tabs.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Media" />
<com.google.android.material.tabs.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Con" />
</com.google.android.material.tabs.TabLayout>
<androidx.viewpager.widget.ViewPager
android:layout_below="@id/tabItemes"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
</androidx.core.widget.NestedScrollView>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
图片库 fragment
public class UserPhoto_fragment extends Fragment {
public static final String TAG="### USER PHOTO ####";
RecyclerView photosRecycler;
fetchPhoto_Adapter adapter;
StaggeredGridLayoutManager layoutManager;
ArrayList<String> ImageList;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.userprofile_photos,container,false);
setRetainInstance(true);
photosRecycler=view.findViewById(R.id.userPhotos_recycler);
layoutManager= new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL);
layoutManager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_NONE);
ImageList=new ArrayList<>();
SpacesItemDecoration itemDecoration = new SpacesItemDecoration(16);
photosRecycler.addItemDecoration(itemDecoration);
photosRecycler.setLayoutManager(layoutManager);
photosRecycler.setHasFixedSize(true);
photosRecycler.setNestedScrollingEnabled(false);
return view;
}
@Override
public void onResume() {
super.onResume();
Log.d(TAG, "onResume: User Photo Fragment "+getView()+ ImageList.size() );
if (ImageList.size()==0){
new fetch_photo().execute();
}
}
public class fetchPhoto_Adapter extends RecyclerView.Adapter<fetchPhoto_Adapter.ViewHolder>{
@NonNull
@Override
public fetchPhoto_Adapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
LayoutInflater inflater= (LayoutInflater) viewGroup.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflater.inflate(R.layout.userprofile_photogallery,viewGroup,false);
return new ViewHolder(v);
}
@Override
public void onBindViewHolder(fetchPhoto_Adapter.ViewHolder viewHolder, int i) {
Glide.with(getActivity()).load(ImageList.get(i)).apply(new RequestOptions().centerCrop()).into(viewHolder.image);
}
@Override
public int getItemCount() {
if (ImageList!=null && ImageList.size()>0){
return ImageList.size();
}else {
return 0;
}
}
public class ViewHolder extends RecyclerView.ViewHolder {
ImageView image;
public ViewHolder(View itemView) {
super(itemView);
image = itemView.findViewById(R.id.UserProfile_photoThumb);
}
}
}
}
图片库的布局文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_marginTop="20dp"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/userPhotos_recycler"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:scrollbars="vertical">
</androidx.recyclerview.widget.RecyclerView>
</RelativeLayout>
我面临此代码的 2 个问题
请帮我解决这些问题。谢谢
最佳答案
您需要NestedScrollableHost滚动 RecyclerView
使用以下布局树为我工作activity.xml
<androidx.constraintlayout.widget.ConstraintLayout
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=".view.MainActivity">
<androidx.viewpager2.widget.ViewPager2
android:id="@+id/vp_views"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" />
</androidx.constraintlayout.widget.ConstraintLayout>
fragment.xml
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:constraint="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
...
<com.anatoli.thebattleofcards.fabric.NestedScrollableHost
android:id="@+id/rv_items_host"
android:layout_width="0dp"
android:layout_height="wrap_content"
constraint:layout_constraintEnd_toEndOf="parent"
constraint:layout_constraintStart_toStartOf="parent"
constraint:layout_constraintTop_toTopOf="parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rv_items"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" <!-- change orientation if needs -->
android:paddingStart="@dimen/layout_padding_small"
android:paddingEnd="@dimen/layout_padding_small"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
</com.anatoli.thebattleofcards.fabric.NestedScrollableHost>
...
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
关于java - Recyclerview 不在嵌套的 ScrollView 内滚动,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61926987/