SettingsActivity: Fix toolbar color in night mode

app/src/main/java/org/isoron/uhabits/activities/BaseScreen.java

@@ -37,6 +37,9 @@ import org.isoron.uhabits.utils.*;
 
 import java.io.*;
 
+import static android.os.Build.VERSION.*;
+import static android.os.Build.VERSION_CODES.*;
+
 /**
  * Base class for all screens in the application.
  * <p>
@@ -95,6 +98,22 @@ public class BaseScreen
         }
     }
 
+    @Deprecated
+    public static int getDefaultActionBarColor(Context context)
+    {
+        if (SDK_INT < LOLLIPOP)
+        {
+            return context
+                .getResources()
+                .getColor(R.color.grey_900, context.getTheme());
+        }
+        else
+        {
+            StyledResources res = new StyledResources(context);
+            return res.getColor(R.attr.colorPrimary);
+        }
+    }
+
     /**
      * Notifies the screen that its contents should be updated.
      */

app/src/main/java/org/isoron/uhabits/activities/settings/SettingsActivity.java

@@ -35,9 +35,17 @@ public class SettingsActivity extends BaseActivity
     {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.settings_activity);
+        setupActionBarColor();
+    }
 
+    private void setupActionBarColor()
+    {
         StyledResources res = new StyledResources(this);
-        int color = res.getColor(R.attr.aboutScreenColor);
+        int color = BaseScreen.getDefaultActionBarColor(this);
+
+        if (res.getBoolean(R.attr.useHabitColorAsPrimary))
+            color = res.getColor(R.attr.aboutScreenColor);
+
         BaseScreen.setupActionBarColor(this, color);
     }
 }