如何在片段中实现cardview？

Question

我有一个片段，其中我已经在屏幕顶部实现了一个回收器视图，其中包含卡片视图，现在我想创建另一个回收器视图，它还将卡片视图添加到同一片段中的屏幕底部。

我是 android studio 的新手，所以知道在哪里放置对我来说有问题的地方。

这是片段代码

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

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_home, container, false);

        view = inflater.inflate(R.layout.fragment_home, container, false);
        mBlogList = (RecyclerView)view.findViewById (R.id.myRecycleView);
        mBlogList.setHasFixedSize(true);
        mBlogList.setLayoutManager(new LinearLayoutManager(getContext()));
        mDatabase = FirebaseDatabase.getInstance().getReference().child("Global");

        return view;
    }

    @Override
    public void onStart() {
        super.onStart();
        FirebaseRecyclerAdapter<Blog, BlogViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Blog, BlogViewHolder>
                (Blog.class,R.layout.blog_row, BlogViewHolder.class, mDatabase) {
            @Override
            protected void populateViewHolder(BlogViewHolder viewHolder, Blog model, int position) {
                viewHolder.setTitle(model.getTitle());
                viewHolder.setDesc(model.getDesc());
                viewHolder.setImage(getContext(), model.getImage());
            }
        };
        mBlogList.setAdapter(firebaseRecyclerAdapter);
    }
    public static class BlogViewHolder extends RecyclerView.ViewHolder{

        View mView;
        public BlogViewHolder(View itemView){
            super(itemView);
            mView = itemView;
        }
        public void setTitle(String title){
            TextView post_title = (TextView) mView.findViewById(R.id.post_title);
            post_title.setText(title);
        }
        public void setDesc(String desc){
            TextView post_desc = (TextView) mView.findViewById(R.id.post_desc);
            post_desc.setText(desc);
        }
        public void setImage(Context ctx, String image){
            ImageView post_image = (ImageView) mView.findViewById(R.id.post_image);
            Picasso.with(ctx).load(image).into(post_image);
        }
    }
}

现在如何添加另一个回收器视图？

这是布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    tools:context="com.bahdape.archangels.MainActivity"
    xmlns:tools="http://schemas.android.com/tools">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="285dp"
    android:layout_marginTop="2dp"
    android:layout_margin="5dp"
    android:background="@drawable/rounded_corner">

    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="285dp"
        android:id="@+id/myRecycleView"
        android:orientation="horizontal">

    </android.support.v7.widget.RecyclerView>
</RelativeLayout>
    </RelativeLayout>

Answer 1

我建议您改用 ConstraintLayout。

例如：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/rootContainer"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rv_1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_blue_dark"
        app:layout_constraintBottom_toTopOf="@id/rv_2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_chainStyle="packed" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rv_2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_green_light"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/rv_1" />
</androidx.constraintlayout.widget.ConstraintLayout>

会产生这个：