优化

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

@@ -25,7 +25,8 @@
 
     <FrameLayout
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
         android:background="@color/background_card">
 
         <androidx.recyclerview.widget.RecyclerView
@@ -42,4 +43,13 @@
 
     </FrameLayout>
 
+    <io.legado.app.ui.widget.text.AccentBgTextView
+        android:id="@+id/tv_ok"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="10dp"
+        android:layout_margin="3dp"
+        android:text="@string/ok"
+        android:gravity="center" />
+
 </LinearLayout>

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

@@ -1,11 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
-    android:orientation="horizontal"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:gravity="center_vertical"
-    android:padding="5dp">
+    android:orientation="horizontal"
+    android:padding="5dp"
+    android:background="?attr/selectableItemBackground"
+    tools:ignore="UseCompoundDrawables">
 
     <ImageView
         android:id="@+id/image_view"

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

@@ -1,22 +1,30 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
-    android:orientation="horizontal"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:gravity="center_vertical"
-    android:padding="5dp">
+    android:layout_height="wrap_content">
 
-    <ImageView
-        android:id="@+id/image_view"
-        android:layout_width="24dp"
-        android:layout_height="24dp"
-        tools:ignore="ContentDescription" />
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_vertical"
+        android:background="?attr/selectableItemBackground"
+        android:padding="5dp"
+        tools:ignore="UseCompoundDrawables,UselessParent">
 
-    <TextView
-        android:id="@+id/text_view"
-        android:layout_width="wrap_content"
-        android:layout_height="match_parent"
-        android:gravity="center_vertical" />
+        <ImageView
+            android:id="@+id/image_view"
+            android:layout_width="24dp"
+            android:layout_height="24dp"
+            tools:ignore="ContentDescription" />
 
-</LinearLayout>
+        <TextView
+            android:id="@+id/text_view"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:gravity="center_vertical" />
+
+    </LinearLayout>
+
+</FrameLayout>