[챕터 2-6-4] 리싸이클러 뷰 ★

2020. 2. 18. 18:10Android/Android 챕터 2-6

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결과화면

리스트 항목 중 한개의 항목을 클릭 시 

하단에 해당하는 토스트 메세지 출력


프로젝트명 : MyList

 

컨테이너 > 리사이클러뷰 다운로드

다운로드 후 안드 재실행

 

 


 


 

 

 


Person.java

더보기
package org.minokuma.mylist;

public class Person {

    String name;
    String mobile;

    public Person(String name, String mobile) {
        this.name = name;
        this.mobile = mobile;
    }

    public String getName() {
        return name;
    }

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

    public String getMobile() {
        return mobile;
    }

    public void setMobile(String mobile) {
        this.mobile = mobile;
    }
}




PersonAdapter.java

 

더보기
package org.minokuma.mylist;

import android.text.Layout;
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.ArrayList;

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

    ArrayList<Person> persons = new ArrayList<Person>();

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View itemView = layoutInflater.inflate(R.layout.person_item, parent, false);
        return new ViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Person person = persons.get(position);
        holder.setItem(person);
    }

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

    static class ViewHolder extends RecyclerView.ViewHolder {
        TextView textView;
        TextView textView2;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
            textView2 = itemView.findViewById(R.id.textView2);
        }

        public void setItem(Person persion){
            textView.setText(persion.getName());
            textView2.setText(persion.getMobile());
        }
    }
}

 


person_item.xml

리니어 레이아웃 : 가로

 

 


컨테이너 > 카드 뷰 다운로드

다운로드 후 안스 재실행

 

 

 

 


person_item.xml

 

더보기
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardBackgroundColor="#FFFFFF"
        app:cardCornerRadius="10dp"
        app:cardElevation="5dp"
        app:cardUseCompatPadding="true">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <ImageView
                android:id="@+id/imageView"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:layout_margin="10dp"
                app:srcCompat="@mipmap/ic_launcher" />

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:orientation="vertical"
                android:layout_margin="5dp">

                <TextView
                    android:id="@+id/textView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="이름"
                    android:textColor="#0000FF"
                    android:textSize="30sp"/>

                <TextView
                    android:id="@+id/textView2"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="전화번호"
                    android:textColor="#00FFFF"
                    android:textSize="18sp" />

            </LinearLayout>

        </LinearLayout>
    </androidx.cardview.widget.CardView>
</LinearLayout>

 



PersonAdapter.java

 

더보기
package org.minokuma.mylist;

import android.text.Layout;
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.lang.reflect.Array;
import java.util.ArrayList;

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

    ArrayList<Person> persons = new ArrayList<Person>();

    public void addItem(Person person){
        persons.add(person);
    }


    public void setItems(ArrayList<Person> persons){
        this.persons = persons;
    }

    public Person getItem(int position){
        return persons.get(position);
    }

    public void setItem(int position, Person person){
        persons.set(position, person);
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View itemView = layoutInflater.inflate(R.layout.person_item, parent, false);
        return new ViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Person person = persons.get(position);
        holder.setItem(person);
    }

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

    static class ViewHolder extends RecyclerView.ViewHolder {
        TextView textView;
        TextView textView2;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
            textView2 = itemView.findViewById(R.id.textView2);
        }

        public void setItem(Person persion){
            textView.setText(persion.getName());
            textView2.setText(persion.getMobile());
        }
    }
}

 


 

 

 


그리드 레이아웃 전환 (이 부분은 건너뛰어도 됨)

 

MainActivity.java

더보기
package org.minokuma.mylist;

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

import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RecyclerView recyclerView = findViewById(R.id.recycler_view);
        //LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 2);
        //recyclerView.setLayoutManager(linearLayoutManager);
        recyclerView.setLayoutManager(gridLayoutManager);

        PersonAdapter personAdapter = new PersonAdapter();
        personAdapter.addItem(new Person("미노쿠마", "010-2020-3030"));
        personAdapter.addItem(new Person("키타무라", "010-1010-4040"));
        personAdapter.addItem(new Person("세나", "010-3030-55050"));
        recyclerView.setAdapter(personAdapter);
    }
}

 


 


클래스명 : OnPersonItemClickListener

더보기
package org.minokuma.mylist;

import android.view.View;

public interface OnPersonItemClickListener {
    public void onItemClick(PersonAdapter.ViewHolder holder, View view, int position);
}


PersonAdapter.java

 

더보기
package org.minokuma.mylist;

import android.text.Layout;
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.lang.reflect.Array;
import java.util.ArrayList;

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

    ArrayList<Person> persons = new ArrayList<Person>();

    OnPersonItemClickListener onPersonItemClickListener;

    public void addItem(Person person){
        persons.add(person);
    }


    public void setItems(ArrayList<Person> persons){
        this.persons = persons;
    }

    public Person getItem(int position){
        return persons.get(position);
    }

    public void setItem(int position, Person person){
        persons.set(position, person);
    }

    public void setOnPersonItemClickListener(OnPersonItemClickListener onPersonItemClickListener){
        this.onPersonItemClickListener = onPersonItemClickListener;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View itemView = layoutInflater.inflate(R.layout.person_item, parent, false);
        return new ViewHolder(itemView, onPersonItemClickListener);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Person person = persons.get(position);
        holder.setItem(person);
    }

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

    static class ViewHolder extends RecyclerView.ViewHolder {
        TextView textView;
        TextView textView2;

        public ViewHolder(@NonNull final View itemView, final OnPersonItemClickListener onPersonItemClickListener) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
            textView2 = itemView.findViewById(R.id.textView2);

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    int position = getAdapterPosition();
                    if(onPersonItemClickListener != null){
                        onPersonItemClickListener.onItemClick(ViewHolder.this, v, position);
                    }
                }
            });
        }

        public void setItem(Person persion){
            textView.setText(persion.getName());
            textView2.setText(persion.getMobile());
        }
    }
}

 


MainActivity.java

 

더보기
package org.minokuma.mylist;

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

import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    PersonAdapter personAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RecyclerView recyclerView = findViewById(R.id.recycler_view);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        //GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 2);
        recyclerView.setLayoutManager(linearLayoutManager);
        //recyclerView.setLayoutManager(gridLayoutManager);

        personAdapter = new PersonAdapter();
        personAdapter.addItem(new Person("미노쿠마", "010-2020-3030"));
        personAdapter.addItem(new Person("키타무라", "010-1010-4040"));
        personAdapter.addItem(new Person("세나", "010-3030-55050"));
        recyclerView.setAdapter(personAdapter);

        personAdapter.setOnPersonItemClickListener(new OnPersonItemClickListener() {
            @Override
            public void onItemClick(PersonAdapter.ViewHolder holder, View view, int position) {
                Person person = personAdapter.getItem(position);
                showToToast("아이템 선택됨 : " + person.getName());
            }
        });

    }

    public void showToToast(String data){
        Toast.makeText(this, data, Toast.LENGTH_SHORT).show();
    }

}

 

 

 

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