TouchGestures: Make Navbar follow system theme color

Signed-off-by: AnierinB <[email protected]>

res/values/colors.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2020 The ShapeShiftOS Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+          http://www.apache.org/licenses/LICENSE-2.0
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<resources>
+    <color name="primary_color">@*android:color/notification_material_background_color</color>
+</resources>

src/com/android/touch/gestures/TouchscreenGestureSettings.java

@@ -21,12 +21,15 @@
 import android.app.Fragment;
 import android.content.Context;
 import android.content.Intent;
+import android.content.res.Resources;
 import android.content.SharedPreferences;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
 import android.os.Bundle;
 import android.os.UserHandle;
 import android.view.MenuItem;
+import android.view.Window;
+import android.view.WindowManager;
 
 import android.preference.PreferenceActivity;
 import androidx.preference.ListPreference;
@@ -82,6 +85,14 @@ public static class MainSettingsFragment extends PreferenceFragment {
         @Override
         public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
 
+            Resources res = getResources();
+            Window win = getActivity().getWindow();
+
+            win.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
+            win.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+            win.setNavigationBarColor(res.getColor(R.color.primary_color));
+            win.setNavigationBarDividerColor(res.getColor(R.color.primary_color));
+
             setPreferencesFromResource(R.xml.touchscreen_gesture_settings, rootKey);
 
             actionBar = getActivity().getActionBar();