添加无数据的状态展示。

app/src/main/java/com/all/pdfreader/pro/app/ui/fragment/HomeFrag.kt

@@ -68,7 +68,12 @@ class HomeFrag : BaseFrag(), MainActivity.SortableFragment {
             viewLifecycleOwner.lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
                 PdfRepository.getInstance().getAllDocuments().collect { list ->
                     val sortedList = sortDocuments(list)
-                    adapter.updateData(sortedList)
+                    if (list.isNotEmpty()) {
+                        adapter.updateData(sortedList)
+                        binding.noFilesLayout.visibility = View.GONE
+                    } else {
+                        binding.noFilesLayout.visibility = View.VISIBLE
+                    }
                     logDebug("更新adapter数据，排序方式: ${appStore.documentSortType}")
                 }
             }

app/src/main/java/com/all/pdfreader/pro/app/ui/fragment/RecentlyFrag.kt

@@ -46,7 +46,7 @@ class RecentlyFrag : BaseFrag() {
 
         // 下拉刷新示例
         binding.swipeRefreshLayout.setOnRefreshListener {
-            observeDocuments{
+            observeDocuments {
                 binding.swipeRefreshLayout.isRefreshing = false
             }
         }
@@ -56,8 +56,13 @@ class RecentlyFrag : BaseFrag() {
         lifecycleScope.launch {
             viewLifecycleOwner.lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
                 PdfRepository.getInstance().getRecentlyOpenedDocuments().collect { list ->
-                    adapter.updateData(list)
+                    if (list.isNotEmpty()) {
-                    onComplete()
+                        adapter.updateData(list)
+                        onComplete()
+                        binding.noFilesLayout.visibility = View.GONE
+                    } else {
+                        binding.noFilesLayout.visibility = View.VISIBLE
+                    }
                     logDebug("更新adapter数据")
                 }
             }

app/src/main/res/layout/fragment_home.xml

@@ -10,6 +10,28 @@
         android:layout_width="match_parent"
         android:layout_height="0dp" />
 
+    <LinearLayout
+        android:id="@+id/noFilesLayout"
+        android:layout_width="match_parent"
+        android:visibility="gone"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:src="@mipmap/img_no_files_yet" />
+
+        <TextView
+            style="@style/TextViewFont_PopMedium"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/no_files_yet"
+            android:textColor="#B6BFCC"
+            android:textSize="20sp" />
+    </LinearLayout>
+
     <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
         android:id="@+id/swipeRefreshLayout"
         android:layout_width="match_parent"

app/src/main/res/layout/fragment_recently.xml

@@ -10,6 +10,29 @@
         android:layout_width="match_parent"
         android:layout_height="0dp" />
 
+    <LinearLayout
+        android:id="@+id/noFilesLayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:src="@mipmap/img_no_files_yet" />
+
+        <TextView
+            style="@style/TextViewFont_PopMedium"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/no_files_yet"
+            android:textColor="#B6BFCC"
+            android:textSize="20sp" />
+    </LinearLayout>
+
+
     <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
         android:id="@+id/swipeRefreshLayout"
         android:layout_width="match_parent"

app/src/main/res/values/strings.xml

@@ -118,4 +118,5 @@
     <string name="delete_bookmarks_title">Delete Bookmarks</string>
     <string name="delete_bookmarks_desc">Are you sure you want to delete all Bookmarks?</string>
     <string name="bookmark_loading">Loading bookmarks, please try again later</string>
+    <string name="no_files_yet">no files yet</string>
 </resources>