add support for S Pen remote actions

app/src/main/AndroidManifest.xml

@@ -150,7 +150,15 @@
         <activity
             android:name=".ui.book.read.ReadBookActivity"
             android:configChanges="locale|keyboardHidden|orientation|screenSize|smallestScreenSize|screenLayout"
-            android:launchMode="singleTask" />
+            android:launchMode="singleTask">
+            <intent-filter>
+                <action android:name="com.samsung.android.support.REMOTE_ACTION" />
+            </intent-filter>
+
+            <meta-data
+                android:name="com.samsung.android.support.REMOTE_ACTION"
+                android:resource="@xml/spen_remote_actions" />
+        </activity>
         <!-- 书籍详情页 -->
         <activity
             android:name=".ui.book.info.BookInfoActivity"

app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt

@@ -302,6 +302,14 @@ class ReadBookActivity : ReadBookBaseActivity(),
                     return true
                 }
             }
+            keyCode == KeyEvent.KEYCODE_PAGE_UP -> {
+                binding.readView.pageDelegate?.keyTurnPage(PageDirection.PREV)
+                return true
+            }
+            keyCode == KeyEvent.KEYCODE_PAGE_DOWN -> {
+                binding.readView.pageDelegate?.keyTurnPage(PageDirection.NEXT)
+                return true
+            }
             keyCode == KeyEvent.KEYCODE_SPACE -> {
                 binding.readView.pageDelegate?.keyTurnPage(PageDirection.NEXT)
                 return true

app/src/main/res/xml/spen_remote_actions.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<remote-actions
+    actionset_label="@string/app_name"
+    version="1.2">
+    <action
+        id="next_page"
+        label="@string/next_page"
+        priority="1"
+        repeatable="true"
+        repeatable_interval="short"
+        trigger_key="PAGE_DOWN">
+        <preference name="gesture" value="click" />
+    </action>
+    <action
+        id="prev_page"
+        label="@string/prev_page"
+        priority="2"
+        repeatable="true"
+        repeatable_interval="short"
+        trigger_key="PAGE_UP">
+        <preference name="gesture" value="double_click" />
+    </action>
+</remote-actions>