show a different placeholder at empty favorites

app/src/main/kotlin/com/simplemobiletools/contacts/fragments/ContactsFragment.kt

@@ -12,6 +12,10 @@ class ContactsFragment(context: Context, attributeSet: AttributeSet) : MyViewPag
         }
     }
 
+    override fun placeholderClicked() {
+        activity!!.showFilterDialog()
+    }
+
     override fun refreshItems() {
         initContacts()
     }

app/src/main/kotlin/com/simplemobiletools/contacts/fragments/FavoritesFragment.kt

@@ -6,12 +6,20 @@ import com.simplemobiletools.contacts.dialogs.AddFavoritesDialog
 
 class FavoritesFragment(context: Context, attributeSet: AttributeSet) : MyViewPagerFragment(context, attributeSet) {
     override fun fabClicked() {
-        AddFavoritesDialog(activity!!) {
-            initContacts()
-        }
+        showAddFavoritesDialog()
+    }
+
+    override fun placeholderClicked() {
+        showAddFavoritesDialog()
     }
 
     override fun refreshItems() {
         initContacts()
     }
+
+    private fun showAddFavoritesDialog() {
+        AddFavoritesDialog(activity!!) {
+            initContacts()
+        }
+    }
 }

app/src/main/kotlin/com/simplemobiletools/contacts/fragments/MyViewPagerFragment.kt

@@ -36,11 +36,16 @@ abstract class MyViewPagerFragment(context: Context, attributeSet: AttributeSet)
             }
 
             fragment_placeholder_2.setOnClickListener {
-                activity.showFilterDialog()
+                placeholderClicked()
             }
 
             fragment_placeholder_2.paintFlags = fragment_placeholder_2.paintFlags or Paint.UNDERLINE_TEXT_FLAG
             updateViewStuff()
+
+            if (this is FavoritesFragment) {
+                fragment_placeholder.text = activity.getString(R.string.no_favorites)
+                fragment_placeholder_2.text = activity.getString(R.string.add_favorites)
+            }
         }
 
         initContacts()
@@ -153,4 +158,6 @@ abstract class MyViewPagerFragment(context: Context, attributeSet: AttributeSet)
     }
 
     abstract fun fabClicked()
+
+    abstract fun placeholderClicked()
 }