パスをサブタイトルに表示するように

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

@@ -23,6 +23,7 @@ import dagger.hilt.android.AndroidEntryPoint;
 import one.nem.lacerta.component.viewer.ViewerMainActivity;
 import one.nem.lacerta.data.LacertaLibrary;
 import one.nem.lacerta.model.LibraryItemPage;
+import one.nem.lacerta.model.ListItemType;
 import one.nem.lacerta.utils.FeatureSwitch;
 import one.nem.lacerta.utils.LacertaLogger;
 
@@ -43,6 +44,7 @@ public class LibraryPageFragment extends Fragment {
     String folderId;
     String title;
     String parentId;
+    Toolbar toolbar;
 
 
     @Inject
@@ -128,12 +130,19 @@ public class LibraryPageFragment extends Fragment {
             logger.debug("LibraryTopFragment", "getArguments() is null(maybe root)");
             this.libraryItemPage = new LibraryItemPage();
         }
+        this.toolbar = view.findViewById(R.id.library_toolbar);
 
         // Toolbar Setup
-        toolbarSetup(view.findViewById(R.id.library_toolbar), this.folderId != null, this.title != null ? this.title : "ライブラリ");
+        toolbarSetup(this.toolbar, this.folderId != null, this.title != null ? this.title : "ライブラリ");
+        if(this.folderId == null) {
+            updateToolbarSubtitle(this.toolbar, null); //負荷軽減のため+邪魔なので（folderIdがnullの場合は、ルートフォルダを表示しているので）
+        } else {
+            lacertaLibrary.getPublicPath(this.folderId, ListItemType.ITEM_TYPE_FOLDER).thenAccept(publicPath -> {
+                updateToolbarSubtitle(this.toolbar, "/" + publicPath.parent().getStringPath());
+            });
+        }
 
         // RecyclerView Setup
-
         RecyclerView recyclerView = view.findViewById(R.id.library_item_recycler_view);
         this.listItemAdapter = new ListItemAdapter(new DocumentSelectListener() {
             @Override
@@ -168,6 +177,7 @@ public class LibraryPageFragment extends Fragment {
         recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
 
         // Get library page and update RecyclerView items
+
         lacertaLibrary.getLibraryPage(this.folderId, 10).thenAccept(libraryItemPage -> {
             this.libraryItemPage = libraryItemPage;
 
@@ -216,6 +226,7 @@ public class LibraryPageFragment extends Fragment {
             lacertaLibrary.createFolder(pageId, input.getText().toString()).thenAccept(folderId -> {
                 // Refresh
                 updateItem(pageId);
+
             });
         });
         builder.setNegativeButton("キャンセル", (dialog, which) -> {
@@ -226,7 +237,7 @@ public class LibraryPageFragment extends Fragment {
     }
 
     /**
-     * RecyclerViewのアイテムを更新する
+     * RecyclerViewのアイテムとUIを更新する
      */
     private void updateItem(String pageId) {
         lacertaLibrary.getLibraryPage(pageId, 10).thenAccept(libraryItemPage -> {
@@ -242,6 +253,16 @@ public class LibraryPageFragment extends Fragment {
         });
     }
 
+    /**
+     * Toolbarのサブタイトルを更新
+     * @param subtitle サブタイトル
+     */
+    private void updateToolbarSubtitle(Toolbar toolbar, String subtitle) {
+        getActivity().runOnUiThread(() -> {
+            toolbar.setSubtitle(subtitle);
+        });
+    }
+
     /**
      * ToolbarをInitする
      *

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

@@ -13,7 +13,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content">
 
-            <com.google.android.material.appbar.CollapsingToolbarLayout
+            <com.google.android.material.appbar.SubtitleCollapsingToolbarLayout
                 android:id="@+id/collapsing_toolbar"
                 app:contentScrim="@color/colorSecondaryContainer"
                 android:background="@color/colorSurface"
@@ -35,7 +35,7 @@
                     app:layout_collapseMode="pin"
                     app:title="HOGE" />
 
-            </com.google.android.material.appbar.CollapsingToolbarLayout>
+            </com.google.android.material.appbar.SubtitleCollapsingToolbarLayout>
 
         </com.google.android.material.appbar.AppBarLayout>