RecyclerView 리스트(문자목록, 통화목록 ..)

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

</LinearLayout>

* MainActivity.java

public class MainActivity extends AppCompatActivity {

    private DbHelper dbHelper = new DbHelper(this);
    private LibraryHelper libraryHelper = new LibraryHelper();

    private TextView subject;

    private DrawerLayout drawerLayout;
    private MainFragment mainFragment = new MainFragment(this);

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

        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setHasFixedSize(true);

        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        
        ArrayList<Memory> memoryList = dbHelper.memoryList();
        
        MemoryAdapter memoryAdapter = new MemoryAdapter(memoryList);
        recyclerView.setAdapter(memoryAdapter);
	}
    
}

* recycler_item.xml

<?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:orientation="vertical">

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

    <TextView
        android:id="@+id/url"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView" />
    
</LinearLayout>

* MemoryAdapter.java

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

    public static class MemoryViewHolder extends RecyclerView.ViewHolder {

        TextView title;
        TextView url;

        MemoryViewHolder(View view) {
            super(view);

            title = view.findViewById(R.id.title);
            url = view.findViewById(R.id.url);
        }

    }

    private ArrayList<Memory> memoryList;

    public MemoryAdapter(ArrayList<Memory> memoryList) {
        this.memoryList = memoryList;
    }

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_item, parent, false);

        return new MemoryViewHolder(v);
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
        MemoryViewHolder memoryViewHolder = (MemoryViewHolder) holder;

        memoryViewHolder.title.setText(memoryList.get(position).getTitle());
        memoryViewHolder.url.setText(memoryList.get(position).getUrl());
    }

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

}