FABs in canteen fragment now dodge away from snack bars; snack bar now used to tell the user that no news are available for a canteen

app/src/main/java/com/denizk0461/weserplaner/activity/FetcherActivity.kt

@@ -145,12 +145,20 @@ class FetcherActivity : FragmentActivity() {
 
                     } catch (e: IOException) {
                         // Let the user know that an error occurred
-                        theme.showErrorSnackBar(binding.rootView, getString(R.string.fetch_error_snack), binding.bottomAppBar)
+                        theme.showErrorSnackBar(
+                            binding.rootView,
+                            getString(R.string.fetch_error_snack),
+                            binding.bottomAppBar
+                        )
                     }
                 }
             } else {
                 // Tell the user that they must navigate to their timetable
-                theme.showErrorSnackBar(binding.rootView, getString(R.string.fetch_error_webpage_snack), binding.bottomAppBar)
+                theme.showErrorSnackBar(
+                    binding.rootView,
+                    getString(R.string.fetch_error_webpage_snack),
+                    binding.bottomAppBar
+                )
             }
         }
     }

app/src/main/java/com/denizk0461/weserplaner/data/Extensions.kt

@@ -55,6 +55,33 @@ fun showToast(context: Context, text: String) {
     Toast.makeText(context, text, Toast.LENGTH_SHORT).show()
 }
 
+/**
+ * Show a snack bar. Colours will be applied according to the theme given.
+ *
+ * @receiver        theme to apply colours of
+ * @param view      view where the snack bar will be shown in
+ * @param text      text to present in the snack bar
+ * @param anchor    view to anchor the snack bar to
+ */
+fun Resources.Theme.showSnackBar(view: CoordinatorLayout, text: String, anchor: View? = null) {
+    val s = Snackbar.make(view, text, Snackbar.LENGTH_SHORT)
+        // Set colours
+        .setTextColor(getThemedColor(com.google.android.material.R.attr.colorOnSurfaceInverse))
+        .setBackgroundTint(getThemedColor(com.google.android.material.R.attr.colorSurfaceInverse))
+
+    // Set anchor view, if one has been passed
+    anchor?.let { a -> s.setAnchorView(a) }
+    s.show()
+}
+
+/**
+ * Show an error snack bar. Error colours will be applied according to the theme given.
+ *
+ * @receiver        theme to apply colours of
+ * @param view      view where the snack bar will be shown in
+ * @param text      text to present in the snack bar
+ * @param anchor    view to anchor the snack bar to
+ */
 fun Resources.Theme.showErrorSnackBar(view: CoordinatorLayout, text: String, anchor: View? = null) {
     val s = Snackbar
         .make(view, text, Snackbar.LENGTH_SHORT)
@@ -62,6 +89,7 @@ fun Resources.Theme.showErrorSnackBar(view: CoordinatorLayout, text: String, anc
         .setBackgroundTint(getThemedColor(R.attr.colorErrorContainer))
         .setTextColor(getThemedColor(R.attr.colorOnErrorContainer))
 
+    // Set anchor view, if one has been passed
     anchor?.let { a -> s.setAnchorView(a) }
     s.show()
 }

app/src/main/java/com/denizk0461/weserplaner/fragment/CanteenFragment.kt

@@ -14,7 +14,7 @@ import com.denizk0461.weserplaner.data.getTextSheet
 import com.denizk0461.weserplaner.data.getThemedColor
 import com.denizk0461.weserplaner.data.setRainbowProgressCircle
 import com.denizk0461.weserplaner.data.showErrorSnackBar
-import com.denizk0461.weserplaner.data.showToast
+import com.denizk0461.weserplaner.data.showSnackBar
 import com.denizk0461.weserplaner.databinding.FragmentCanteenBinding
 import com.denizk0461.weserplaner.model.*
 import com.denizk0461.weserplaner.viewmodel.CanteenViewModel
@@ -86,7 +86,8 @@ class CanteenFragment : AppFragment() {
 
                 // Set up click listener to tell the user that no news are available
                 binding.buttonNotifications.setOnClickListener {
-                    showToast(context, getString(R.string.text_sheet_news_empty))
+//                    showToast(context, getString(R.string.text_sheet_news_empty))
+                    context.theme.showSnackBar(binding.snackbarContainer, getString(R.string.text_sheet_news_empty))
                 }
 
             } else {

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

@@ -247,6 +247,7 @@
         android:layout_height="wrap_content"
         android:orientation="vertical"
         android:layout_gravity="bottom|end"
+        app:layout_dodgeInsetEdges="bottom"
         app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior">
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
@@ -256,8 +257,8 @@
             android:layout_height="wrap_content"
             app:srcCompat="@drawable/clock"
             android:contentDescription="@string/canteen_fab_opening_hours_content_desc"
-            android:layout_gravity="center_horizontal"
             android:tooltipText="@string/canteen_fab_opening_hours_content_desc"
+            android:layout_gravity="center_horizontal"
             tools:ignore="UnusedAttribute"/>
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
@@ -267,9 +268,9 @@
             android:layout_height="wrap_content"
             app:srcCompat="@drawable/switch_arrows"
             android:contentDescription="@string/canteen_fab_switch_canteen_content_desc"
-            android:layout_marginBottom="8dp"
-            android:layout_gravity="center_horizontal"
             android:tooltipText="@string/canteen_fab_switch_canteen_content_desc"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginBottom="4dp"
             tools:ignore="UnusedAttribute"/>
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton