Add a Fab to scroll down parent comments. Use volume up and down keys to navigate parent comments.

4 files changed, 28 insertions, 3 deletions

diff --git a/app/src/main/res/drawable/ic_keyboard_arrow_down_24dp.xml b/app/src/main/res/drawable/ic_keyboard_arrow_down_24dp.xml
new file mode 100644
index 00000000..9f2d9ba3
--- /dev/null
+++ b/app/src/main/res/drawable/ic_keyboard_arrow_down_24dp.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FFFFFFFF"
+      android:pathData="M7.41,8.59L12,13.17l4.59,-4.58L18,10l-6,6 -6,-6 1.41,-1.41z"/>
+</vector>
diff --git a/app/src/main/res/layout/activity_view_post_detail.xml b/app/src/main/res/layout/activity_view_post_detail.xml
index eb48f340..98794359 100644
--- a/app/src/main/res/layout/activity_view_post_detail.xml
+++ b/app/src/main/res/layout/activity_view_post_detail.xml
@@ -70,4 +70,14 @@
 
     </LinearLayout>
 
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab_view_post_detail_activity"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="@dimen/fab_margin"
+        app:backgroundTint="@color/backgroundColorPrimary"
+        app:tint="@android:color/white"
+        app:srcCompat="@drawable/ic_keyboard_arrow_down_24dp" />
+
 </androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 88228a44..9452003c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -289,6 +289,7 @@
     <string name="settings_amoled_dark_title">Amoled Dark</string>
     <string name="settings_immersive_interface_title">Immersive Interface</string>
     <string name="settings_vote_buttons_on_the_right_title">Vote Buttons on the Right</string>
+    <string name="settings_volume_keys_navigate_comments_title">Use Volume Keys to Navigate Comments in Posts</string>
     <string name="settings_show_elapsed_time">Show Elpased Time in Posts and Comments</string>
     <string name="swipe_to_go_back_from_post_detail">Swipe Right to Go Back From Comments</string>
     <string name="settings_lazy_mode_interval_title">Lazy Mode Interval</string>
diff --git a/app/src/main/res/xml/main_preferences.xml b/app/src/main/res/xml/main_preferences.xml
index db4b75a1..894642fa 100644
--- a/app/src/main/res/xml/main_preferences.xml
+++ b/app/src/main/res/xml/main_preferences.xml
@@ -29,17 +29,22 @@
     <SwitchPreference
         app:defaultValue="false"
         app:key="vote_buttons_on_the_right"
-        app:title="@string/settings_vote_buttons_on_the_right_title"/>
+        app:title="@string/settings_vote_buttons_on_the_right_title" />
 
     <SwitchPreference
         app:defaultValue="false"
         app:key="show_elapsed_time"
-        app:title="@string/settings_show_elapsed_time"/>
+        app:title="@string/settings_show_elapsed_time" />
 
     <SwitchPreference
         app:defaultValue="true"
         app:key="swipe_to_go_back_from_post_detail"
-        app:title="@string/swipe_to_go_back_from_post_detail"/>
+        app:title="@string/swipe_to_go_back_from_post_detail" />
+
+    <SwitchPreference
+        app:defaultValue="false"
+        app:key="volume_keys_navigate_comments"
+        app:title="@string/settings_volume_keys_navigate_comments_title" />
 
     <Preference
         app:title="@string/settings_font_size_title"