recyclerview 사용하기

rectclerview 라이브러리 추가하기

Gradle Scripts>build.gradel

implementation 'androidx.recyclerview:recyclerview:1.0.0'를 dependencies안에 추가하기

 

 

 

activity_main.xml생성/

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</RelativeLayout>

activity_address.xml생성

<?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="wrap_content"
    android:background="#3F51B5"
    android:layout_margin="10sp"
    android:id="@+id/item">
    <TextView
        android:id="@+id/txtname"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="김경민"
        android:textColor="#ffffff"
        android:textSize="20sp"
        android:padding="10sp"/>
    <TextView
        android:id="@+id/txtadd"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="인천 학익동 icia교육원"
        android:textColor="#0E312F"
        android:textSize="15sp"
        android:layout_below="@id/txtname"
        android:padding="10sp"/>
    <TextView
        android:id="@+id/txttel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="010-1234-1234"
        android:textColor="#0E312F"
        android:textSize="20sp"
        android:layout_alignParentRight="true"
        android:padding="10sp"/>
</RelativeLayout>

 

item.xml생성

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#2196F3"
    android:layout_margin="10sp"
    android:orientation="vertical"
    android:id="@+id/item">
    <TextView
        android:id="@+id/txtcontent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="여기에 내용출력"
        android:textColor="#FFFEFE"
        android:textSize="20sp"
        android:padding="10sp"/>
    <TextView
        android:id="@+id/txtwdate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="여기는 날짜출력"
        android:textColor="#66E8F8"
        android:textSize="15sp"
        android:padding="10sp"
        />
</LinearLayout>

 

MemoVO.java 생성

package com.example.ex12;
//메모에대한 정보를 넣어줄 클래스
public class MemoVO {
    private String content;
    private String wdate;
    //생성자
    public MemoVO(String content, String wdate) {
        this.content = content;
        this.wdate = wdate;
    }
    //Getters AND Setters
    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public String getWdate() {
        return wdate;
    }

    public void setWdate(String wdate) {
        this.wdate = wdate;
    }

}

AddressVO.java 생성

package com.example.ex12;

public class AddressVO {
    private String name;
    private String add;
    private String tel;


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAdd() {
        return add;
    }

    public void setAdd(String add) {
        this.add = add;
    }

    public String getTel() {
        return tel;
    }

    public void setTel(String tel) {
        this.tel = tel;
    }

    public AddressVO(String name, String add, String tel) {
        this.name = name;
        this.add = add;
        this.tel = tel;


    }
}

MemoAdapter.java 생성

package com.example.ex12;

import android.content.Context;
import android.graphics.Color;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

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

import org.w3c.dom.Text;

import java.util.ArrayList;

public class MemoAdapter extends RecyclerView.Adapter<MemoAdapter.ViewHolder> {
    ArrayList<MemoVO> array;
    Context context;
    //어떤데이터,어디서 넘어왔는지
    public MemoAdapter(ArrayList<MemoVO> array,Context context) {
        this.array = array;
        this.context=context;
    }

    //생성
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        //item.xml을 만들어서 view에 넣겠음
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item,parent,false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, final int position) {
        holder.txtconetnt.setText(array.get(position).getContent());
        holder.txtwdate.setText(array.get(position).getWdate());
        //리스너 달기
        holder.item.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(context,array.get(position).getContent(),Toast.LENGTH_SHORT).show();
                //Log.i("log",array.get(position).getContent());

            }
        });
        if(position % 2 == 1){
            holder.item.setBackgroundColor(Color.MAGENTA);
            holder.txtconetnt.setTextColor(Color.YELLOW);
            holder.txtwdate.setTextColor(Color.YELLOW);
        }

    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView txtconetnt,txtwdate;
        LinearLayout item;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            txtconetnt=itemView.findViewById(R.id.txtcontent);
            txtwdate=itemView.findViewById(R.id.txtwdate);
            item=itemView.findViewById(R.id.item);
        }
    }
}

AddAdapter.java생성

package com.example.ex12;

import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

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

import java.util.ArrayList;

public class AddAdapter extends RecyclerView.Adapter<AddAdapter.ViewHolder> {
    ArrayList<AddressVO> array;
    Context context;

    public AddAdapter(ArrayList<AddressVO> array, Context context) {
        this.array = array;
        this.context = context;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_address,parent,false);
        return new ViewHolder(view);
    }
    //데이터를 실제로 넣어줍니다.
    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, final int position) {
        holder.txtname.setText(array.get(position).getName());
        holder.txttel.setText(array.get(position).getTel());
        holder.txtadd.setText(array.get(position).getAdd());

        holder.item.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(context,array.get(position).getName(),Toast.LENGTH_SHORT).show();
            }
        });

        if(position %2 ==1){
            holder.item.setBackgroundColor(Color.parseColor("#28E7FF"));
            holder.txtname.setTextColor(Color.parseColor("#000000"));
        }
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView txtname,txtadd,txttel;
        RelativeLayout item;
        public ViewHolder(@NonNull View itemView) {

            super(itemView);
            txtname=itemView.findViewById(R.id.txtname);
            txtadd=itemView.findViewById(R.id.txtadd);
            txttel=itemView.findViewById(R.id.txttel);
            item=itemView.findViewById(R.id.item);
        }
    }
}

MainAtivity.java생성

package com.example.ex12;

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

import android.os.Bundle;

import java.lang.reflect.Array;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    ArrayList<MemoVO> array;
    RecyclerView list;
    MemoAdapter adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //데이터만들기
        array=new ArrayList<MemoVO>();
        MemoVO vo=new MemoVO("주소록","2019/11/14 08:00:00");
        array.add(vo);

        vo=new MemoVO("은행계좌","2019/11/12 08:58:20");
        array.add(vo);

        vo=new MemoVO("cgv아이디","2019/11/08 20:10:20");
        array.add(vo);

        vo=new MemoVO("yes24아이디","2019/08/08 19:59:55");
        array.add(vo);

        //list만들기
        list=findViewById(R.id.list);
        LinearLayoutManager manager=new LinearLayoutManager(this);
        //매니저
        list.setLayoutManager(manager);

        //어덥터만들기
        adapter=new MemoAdapter(array,this);
        list.setAdapter(adapter);
    }

}