안드로이드 스튜디오 Recycler View 사용

XML 부분

Recycler View 안에 들어갈 아이템들 디자인

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


        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/collect_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="10dp"
                android:layout_toRightOf="@id/imageView2"
                android:text="TextView" />

            <TextView
                android:id="@+id/collect_grade"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@id/collect_title"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="10dp"
                android:layout_marginBottom="-76dp"
                android:layout_toRightOf="@id/imageView2"
                android:text="TextView" />

            <ImageView
                android:id="@+id/imageView2"
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:adjustViewBounds="true"></ImageView>
        </RelativeLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

 

Recycler View Activity XML부분

recyclerView를 넣어주시면 됩니다. TextView, space는 제꺼 디자인 부분이여서 안넣어도 됩니다.

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <Space
            android:layout_width="match_parent"
            android:layout_height="20dp" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:background="@drawable/bg_round_rect"
            android:gravity="center_vertical"
            android:text="모아보기"
            android:textColor="#9b92b3"
            android:textSize="24sp"
            android:textStyle="bold" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:background="@drawable/bg_round_rect"

            tools:layout_editor_absoluteX="101dp"
            tools:layout_editor_absoluteY="137dp">

        </androidx.recyclerview.widget.RecyclerView>

        <TextView
            android:id="@+id/textView5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView" />

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

 

자바 부분

Data Class 부분

package com.example.gui.adapter;

public class collect_data {
    private String Day;
    private String example;

    public collect_data(String day, String example){
        this.Day = day;
        this.example = example;
    }
    public String getDay(){
        return Day;
    }
    public void setDay(String day){
        this.Day = day;
    }
    public String getExample(){
        return example;
    }
    public void setExample(){
        this.example = example;
    }
}

adapter부분

package com.example.gui.adapter;


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.gui.R;

import java.util.ArrayList;

public class collect_adapter extends RecyclerView.Adapter<collect_adapter.ItemViewHolder> {
    private ArrayList<collect_data> listData = null;
    public collect_adapter(ArrayList<collect_data> datalist){
        listData = datalist;
    }

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

        return new ItemViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull collect_adapter.ItemViewHolder holder, int position) {
        holder.onBind(listData.get(position));
    }

    @Override
    public int getItemCount() {

        return listData.size();
    }

    class ItemViewHolder extends RecyclerView.ViewHolder {
        private TextView textView1;
        private TextView textView2;

        ItemViewHolder(View itemView) {
            super(itemView);

            textView1 = itemView.findViewById(R.id.collect_title);
            textView2 = itemView.findViewById(R.id.collect_grade);
        }

        void onBind(collect_data data) {
            textView1.setText(data.getDay());
            textView2.setText(data.getExample());
        }
    }

}

activity부분

저는 Fragment로 해서 getActivity()-> this, RecyclerView recyclerview = findViewById(R.id.recycler_view); 로하시면 됩니다.

public class CollectView extends Fragment {
    private ArrayList<collect_data> dataList;
    public CollectView(){/*Construct*/}
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View rootView=inflater.inflate(R.layout.activity_collect,container,false); //container <-부모 사이즈를 주고 , false=아직 붙이지 않는다.
        // init
        this.init();
        // RecyclerView set
        RecyclerView recyclerView = (RecyclerView)rootView.findViewById(R.id.recycler_view);
        LinearLayoutManager manager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL,false);
        recyclerView.setLayoutManager(manager); // LayoutManager 등록
        recyclerView.setAdapter(new collect_adapter(dataList));  // Adapter 등록
        return rootView;
    }
    // Init Function
    public void init(){
        dataList = new ArrayList<>();

        dataList.add(new collect_data("테스트", "테스트2"));
    }
}

 결과