RecyclerView 추가, 전체보기

main.xml

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity3"
    android:orientation="vertical"
    android:layout_margin="10dp">

    <Button
        android:id="@+id/btnList"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="전체보기"/>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/floatBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        app:srcCompat="@android:drawable/ic_input_add"/>

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


</LinearLayout>

 

item_phone3.xml

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

    <TextView
        android:id="@+id/txtName"
        android:layout_width="130dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginRight="10dp"
        android:textSize="20sp"/>

    <TextView
        android:id="@+id/txtTel"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginRight="10dp"
        android:textSize="20sp"/>

</LinearLayout>

 

 

layout_add3.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp">

    <EditText
        android:id="@+id/etname"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="이름"
        android:textSize="20sp"/>

    <EditText
        android:id="@+id/ettel"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="전화번호"
        android:textSize="20sp"/>
    
</LinearLayout>

 

main.activity

public class MainActivity3 extends AppCompatActivity {
    private PhoneAdapter3 phoneAdapter3;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);

        Button btnList = findViewById(R.id.btnList);
        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        FloatingActionButton floatingActionButton = findViewById(R.id.floatBtn);

        //추가
        floatingActionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                View dialogView = LayoutInflater.from(getApplicationContext()).inflate(R.layout.layout_add3,null);

                EditText etname = dialogView.findViewById(R.id.etname);
                EditText ettel = dialogView.findViewById(R.id.ettel);

                AlertDialog.Builder dlg = new AlertDialog.Builder(MainActivity3.this);
                dlg.setTitle("등록");
                dlg.setView(dialogView);
                dlg.setPositiveButton("등록", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Phone3 p = new Phone3(etname.getText().toString(),ettel.getText().toString());
                        phoneAdapter3.addItem(p);
                    }
                });

                dlg.setNegativeButton("닫기",null);
                dlg.show();
            }
        });

        //전체보기
        btnList.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
//                ArrayList<Phone3> phone3List = new ArrayList<>();
                phoneAdapter3 = new PhoneAdapter3();
                for(int i=0; i<10; i++){
                    phoneAdapter3.addItem(new Phone3("홍길동"+i,"010-1111-2222"));
                }


                LinearLayoutManager linearLayoutManager = new LinearLayoutManager(MainActivity3.this,
                        RecyclerView.VERTICAL, false);
                recyclerView.setLayoutManager(linearLayoutManager);
                recyclerView.setAdapter(phoneAdapter3);
            }
        });

    }
}

 

Phone3.java

public class Phone3 {
    private Long id;
    private String name;
    private String tel;

    public Phone3(String name, String tel) {

        this.name = name;
        this.tel = tel;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public String getTel() {
        return tel;
    }

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

 

PhoneAdapter3.java

public class PhoneAdapter3 extends RecyclerView.Adapter<PhoneAdapter3.PhoneViewHolder> {
    private ArrayList<Phone3>phone3List = new ArrayList<>();

//    //추가
//    public PhoneAdapter3(ArrayList<Phone3> phone3List){
//        this.phone3List = phone3List;
//    }


    //삭제
    public void removeItem(int position){
        phone3List.remove(position);
        notifyDataSetChanged();
    }
    //추가
    public void addItem(Phone3 phone3){
        phone3List.add(phone3);
    }
    //수정
    public void updateItem(Phone3 phone3, int position){    //phone3 수정 내용
        Phone3 p  = phone3List.get(position);   //수정할 객체
        p.setName(phone3.getName());
        p.setTel(phone3.getTel());
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public PhoneAdapter3.PhoneViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from((parent.getContext()));
        View view = inflater.inflate(R.layout.item_phone3, parent, false);
        return new PhoneViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull PhoneAdapter3.PhoneViewHolder holder, int position) {
        Phone3 phone3 = phone3List.get(position);
        holder.txtName.setText(phone3.getName());
        holder.txtTel.setText(phone3.getTel());
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                View dialogView =view.inflate(view.getContext(),R.layout.layout_add3,null);

                EditText etName = dialogView.findViewById(R.id.etname);
                EditText etTel = dialogView.findViewById(R.id.ettel);

                etName.setText(phone3.getName());
                etTel.setText(phone3.getTel());

                AlertDialog.Builder dlg = new AlertDialog.Builder(view.getContext());
                dlg.setTitle("수정");
                dlg.setView(dialogView);


                dlg.setPositiveButton("수정", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Phone3 phone = new Phone3(etName.getText().toString(),
                                etTel.getText().toString());
                        updateItem(phone,holder.getAdapterPosition()); //수정메소드
                    }
                });


                dlg.setNegativeButton("삭제", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Log.d("<<<삭제", "삭제");
                        removeItem(holder.getAdapterPosition());
                    }
                });
                dlg.show();
            }
        });
    }

    @Override
    public int getItemCount() {
        return phone3List == null ?0:phone3List.size();
    }

    public class PhoneViewHolder extends  RecyclerView.ViewHolder {
        TextView txtName, txtTel;

        public PhoneViewHolder(@NonNull View itemView) {
            super(itemView);
            txtName = itemView.findViewById(R.id.txtName);
            txtTel = itemView.findViewById(R.id.txtTel);

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    int position = getAdapterPosition();
                }
            });
        }

    }


}

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결과 값