在Android中使用Recycler View的步骤

步骤1：制作一个具有空活动的Android项目。
步骤2：将重新拾取器视图放入项目中。
步骤3： 转到布局>将新布局设置为“sample_for_recylerview”。
步骤 4：在此布局中完整设计示例。
步骤5：转到Java fils制作两个新包，一个用于“模型”，第二个用于“适配器”。
步骤 6：在模型包中为模型创建 Java 类。

下面是模型类的示例：

package com.example.myfoodapp.mymodels;

public class MainModel {
    int image;
    String priduct_Name;
    String price;
    String discription;

    public MainModel(int image, String priduct_Name, String price, String discription) {
        this.image = image;
        this.priduct_Name = priduct_Name;
        this.price = price;
        this.discription = discription;
    }

    public int getImage() {
        return image;
    }

    public void setImage(int image) {
        this.image = image;
    }

    public String getPriduct_Name() {
        return priduct_Name;
    }

    public void setPriduct_Name(String priduct_Name) {
        this.priduct_Name = priduct_Name;
    }

    public String getPrice() {
        return price;
    }

    public void setPrice(String price) {
        this.price = price;
    }

    public String getDiscription() {
        return discription;
    }

    public void setDiscription(String discription) {
        this.discription = discription;
    }

}

步骤 7：在适配器包中创建一个适配器类和一个适配器类，该类将由 RecylerView.ViewHolder 扩展，并使用它来绑定后端 java 中的前端和视图。

下面是适配器类的示例代码：

package com.example.myfoodapp.myadapters;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.example.myfoodapp.R;
import com.example.myfoodapp.mymodels.MainModel;

import java.util.ArrayList;

public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> {

    ArrayList<MainModel> myList;
    Context context;

    public MainAdapter(ArrayList<MainModel> myList, Context context) {
        this.myList = myList;
        this.context = context;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.sample_mainfoodpage,parent,false);

        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
            MainModel model = myList.get(position);
            holder.myImage.setImageResource(model.getImage());
            holder.myName.setText(model.getPriduct_Name());
            holder.myPrice.setText(model.getPrice());
            holder.MyDes.setText(model.getDiscription());
    }

    @Override
    public int getItemCount() {
        return myList.size();
    }

    //View holding class. . .
    public class ViewHolder extends RecyclerView.ViewHolder{

        ImageView myImage;
        TextView myName, myPrice, MyDes;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            myImage = itemView.findViewById(R.id.my_imageview);
            myName = itemView.findViewById(R.id.lbl_itemname);
            myPrice = itemView.findViewById(R.id.lbl_price);
            MyDes = itemView.findViewById(R.id.lbl_discription);

        }
    }
}

步骤8：制作适配器类后，让我们转到文件中的主活动java文件和程序，如下面的示例所示：

package com.example.myfoodapp;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;
import android.widget.LinearLayout;

import com.example.myfoodapp.myadapters.MainAdapter;
import com.example.myfoodapp.mymodels.MainModel;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    RecyclerView recyclerView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerView = findViewById(R.id.myRecylerview);

        ArrayList<MainModel> list = new ArrayList<>();
        list.add(new MainModel(R.drawable.food1,"Burger","$2.5","Zinger burger with exta toping of chese"));
        list.add(new MainModel(R.drawable.food2,"Pizz","$3.5","Pizza with exta toping of chese"));

        MainAdapter adapter = new MainAdapter(list, this);
        recyclerView.setAdapter(adapter);

        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(linearLayoutManager);
    }
}