仮データを出力できるように調整した。

feature/library/src/main/java/one/nem/lacerta/feature/library/DocumentAdapter.java

@@ -0,0 +1,46 @@
+package one.nem.lacerta.feature.library;
+
+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.List;
+
+public class DocumentAdapter extends RecyclerView.Adapter<DocumentAdapter.DocumentViewHolder> {
+
+    private List<String> documentList;
+
+    public DocumentAdapter(List<String> documentList) {
+        this.documentList = documentList;
+    }
+
+    @NonNull
+    @Override
+    public DocumentViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_library_menu, parent, false);
+        return new DocumentViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull DocumentViewHolder holder, int position) {
+        holder.title.setText(documentList.get(position));
+    }
+
+    @Override
+    public int getItemCount() {
+        return documentList.size();
+    }
+
+    class DocumentViewHolder extends RecyclerView.ViewHolder {
+        TextView title;
+
+        DocumentViewHolder(View itemView) {
+            super(itemView);
+            title = itemView.findViewById(R.id.debug_menu_item_title);
+        }
+    }
+}

feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java

@@ -65,45 +65,6 @@ public class LibraryTopFragment extends Fragment {
     }
 
 
-    public class DocumentAdapter extends RecyclerView.Adapter<DocumentAdapter.DocumentViewHolder> {
-
-        private List<String> documentList;
-
-        public DocumentAdapter(List<String> documentList) {
-            this.documentList = documentList;
-        }
-
-        @NonNull
-        @Override
-        public DocumentViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
-            View view = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
-            return new DocumentViewHolder(view);
-        }
-
-        @Override
-        public void onBindViewHolder(@NonNull DocumentViewHolder holder, int position) {
-            holder.bind(documentList.get(position));
-        }
-
-        @Override
-        public int getItemCount() {
-            return documentList.size();
-        }
-
-        class DocumentViewHolder extends RecyclerView.ViewHolder {
-            private final TextView textView;
-
-            DocumentViewHolder(View itemView) {
-                super(itemView);
-                textView = itemView.findViewById(android.R.id.text1);
-            }
-
-            void bind(String document) {
-                textView.setText(document);
-            }
-        }
-    }
-
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         // Inflate the layout for this fragment
@@ -112,6 +73,9 @@ public class LibraryTopFragment extends Fragment {
         // Use view.findViewById instead of findViewById
         RecyclerView documentRecyclerView = view.findViewById(R.id.document_list);
 
+        LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
+        documentRecyclerView.setLayoutManager(layoutManager);
+
         List<String> documentList = new ArrayList<>();
         documentList.add("Document A");
         documentList.add("Document B");
@@ -122,8 +86,6 @@ public class LibraryTopFragment extends Fragment {
         documentRecyclerView.setAdapter(adapter);
 
 // Use a LinearLayoutManager to specify the layout
-        LinearLayoutManager layoutManager = new LinearLayoutManager(requireContext());
-        documentRecyclerView.setLayoutManager(layoutManager);
         return view;
         }
     }

feature/library/src/main/res/layout/fragment_library_top.xml

@@ -1,23 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<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"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:theme="@style/Theme.Lacerta"
     tools:context=".LibraryTopFragment">
 
     <com.google.android.material.appbar.MaterialToolbar
+        android:id="@+id/tool_bar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@color/colorPrimaryContainer"
-        app:titleTextColor="@color/colorOnPrimaryContainer"
-        app:title="Library"
         android:minHeight="?attr/actionBarSize"
         android:theme="?attr/actionBarTheme"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"/>
+        app:layout_constraintTop_toTopOf="parent"
+        app:title="Library"
+        app:titleTextColor="@color/colorOnPrimaryContainer" />
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/document_list"
@@ -26,6 +27,6 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toBottomOf="@+id/tool_bar" />
 
-</FrameLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

feature/library/src/main/res/layout/list_item_library_menu.xml

@@ -0,0 +1,26 @@
+<?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"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="16dp">
+
+    <TextView
+        android:id="@+id/debug_menu_item_title"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:textSize="16sp"
+        android:layout_marginEnd="8dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/debug_menu_item_description"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:textSize="14sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/debug_menu_item_title" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>