安卓RecyclerView的横向效果_android recyclerview 横向

1.导包：

 implementation 'androidx.recyclerview:recyclerview:1.2.0'

2.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">
 
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
 
</RelativeLayout>

 3.主界面代码：

package com.example.recyclerviewapplication
 
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.RecyclerView
import java.security.AccessController.getContext
 
 
class MainActivity : AppCompatActivity() {
 
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
 
        val data: MutableList<String> = ArrayList()
        for (i in 0..200){
            data.add("Item $i")
        }
 
        val adapter = MyAdapter(
            this,
            data
        )
 
        val recyclerView: RecyclerView =
            findViewById(R.id.recycler_view)
 
      recyclerView.layoutManager = GridLayoutManager(
          this,
          1,
          GridLayoutManager.HORIZONTAL,
          false
      )
 
        recyclerView.adapter = adapter
 
    }
}

4.MyAdpate：

package com.example.recyclerviewapplication;
 
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
 
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
 
import java.util.List;
 
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
 
    private List<String> mData;
 
    public MyAdapter(Context context, List<String> data) {
        mData = data;
    }
 
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }
 
    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.mText.setText(mData.get(position));
    }
 
    @Override
    public int getItemCount() {
        return mData.size();
    }
 
    static class ViewHolder extends RecyclerView.ViewHolder {
 
        TextView mText;
 
        ViewHolder(@NonNull View itemView) {
            super(itemView);
            mText = itemView.findViewById(R.id.textView);
        }
    }
}

5.适配器布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="25dp"
    android:clipChildren="false">
 
 
    <TextView
        android:id="@+id/textView"
        android:layout_width="300px"
        android:padding="10dp"
        android:textSize="20dp"
        android:gravity="center"
        android:textColor="#fff"
        android:layout_height="wrap_content"/>
 
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="300px"
        android:padding="5dp"
        android:background="#f00"
        android:layout_marginTop="60dp"
        android:layout_height="300px" />
 
 
 
</RelativeLayout>