show groups placeholder at Groups tab, if necessary

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

@@ -5,6 +5,9 @@ import android.content.Intent
 import android.support.design.widget.CoordinatorLayout
 import android.util.AttributeSet
 import android.view.ViewGroup
+import com.simplemobiletools.commons.extensions.beVisibleIf
+import com.simplemobiletools.commons.extensions.getAdjustedPrimaryColor
+import com.simplemobiletools.commons.extensions.underlineText
 import com.simplemobiletools.commons.extensions.updateTextColors
 import com.simplemobiletools.contacts.activities.GroupContactsActivity
 import com.simplemobiletools.contacts.activities.MainActivity
@@ -32,6 +35,13 @@ class GroupsFragment(context: Context, attributeSet: AttributeSet) : Coordinator
                 }
             }
 
+            groups_placeholder_2.setOnClickListener {
+                CreateNewGroupDialog(activity) {
+                    refreshContacts(lastContacts)
+                }
+            }
+
+            groups_placeholder_2.underlineText()
             updateViewStuff()
         }
     }
@@ -62,7 +72,11 @@ class GroupsFragment(context: Context, attributeSet: AttributeSet) : Coordinator
             }
         }
 
-        storedGroups = storedGroups.sortedWith(compareBy { it.title }).toList() as ArrayList<Group>
+        groups_placeholder_2.beVisibleIf(storedGroups.isEmpty())
+        groups_placeholder.beVisibleIf(storedGroups.isEmpty())
+        groups_list.beVisibleIf(storedGroups.isNotEmpty())
+
+        storedGroups = storedGroups.sortedWith(compareBy { it.title }) as? ArrayList<Group> ?: ArrayList()
         val currAdapter = groups_list.adapter
         if (currAdapter == null) {
             GroupsAdapter(activity as SimpleActivity, storedGroups, groups_list, groups_fastscroller) {
@@ -117,5 +131,6 @@ class GroupsFragment(context: Context, attributeSet: AttributeSet) : Coordinator
         context.updateTextColors(groups_wrapper.parent as ViewGroup)
         groups_fastscroller.updateBubbleColors()
         groups_fastscroller.allowBubbleDisplay = context.config.showInfoBubble
+        groups_placeholder_2.setTextColor(context.getAdjustedPrimaryColor())
     }
 }

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

@@ -11,6 +11,32 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
 
+        <com.simplemobiletools.commons.views.MyTextView
+            android:id="@+id/groups_placeholder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_centerHorizontal="true"
+            android:layout_marginTop="@dimen/activity_margin"
+            android:gravity="center"
+            android:paddingLeft="@dimen/activity_margin"
+            android:paddingRight="@dimen/activity_margin"
+            android:text="@string/no_group_created"
+            android:textSize="@dimen/bigger_text_size"
+            android:visibility="gone"/>
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:id="@+id/groups_placeholder_2"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_below="@+id/groups_placeholder"
+            android:layout_centerHorizontal="true"
+            android:gravity="center"
+            android:paddingBottom="@dimen/medium_margin"
+            android:paddingTop="@dimen/medium_margin"
+            android:text="@string/create_group"
+            android:textSize="@dimen/bigger_text_size"
+            android:visibility="gone"/>
+
         <com.simplemobiletools.commons.views.MyRecyclerView
             android:id="@+id/groups_list"
             android:layout_width="match_parent"

app/src/main/res/values-de/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">No groups</string>
     <string name="create_new_group">Create a new group</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">Foto machen</string>

app/src/main/res/values-fr/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">No groups</string>
     <string name="create_new_group">Create a new group</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">Prendre une photo</string>

app/src/main/res/values-ko-rKR/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">No groups</string>
     <string name="create_new_group">Create a new group</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">사진 촬영</string>

app/src/main/res/values-lt/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">Nėra grupių</string>
     <string name="create_new_group">Sukurti naują grupę</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">Nufotografuoti</string>

app/src/main/res/values-pt/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">No groups</string>
     <string name="create_new_group">Create a new group</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">Tirar foto</string>

app/src/main/res/values-ru/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">Нет групп</string>
     <string name="create_new_group">Создать новую группу</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">Снять фото</string>

app/src/main/res/values-sk/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">Žiadne skupiny</string>
     <string name="create_new_group">Vytvoriť novú skupinu</string>
     <string name="remove_from_group">Odstrániť zo skupiny</string>
+    <string name="no_group_participants">Skupina je prázdna</string>
+    <string name="add_contacts">Pridať kontakty</string>
+    <string name="no_group_created">Nemáte v zariadení vytvorené žiadne skupiny kontaktov</string>
+    <string name="create_group">Vytvoriť skupinu</string>
 
     <!-- Photo -->
     <string name="take_photo">Vytvoriť foto</string>

app/src/main/res/values-sv/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">No groups</string>
     <string name="create_new_group">Create a new group</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">Ta foto</string>

app/src/main/res/values-zh-rTW/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">沒有群組</string>
     <string name="create_new_group">Create a new group</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">拍照</string>

app/src/main/res/values/strings.xml

@@ -19,6 +19,10 @@
     <string name="no_groups">No groups</string>
     <string name="create_new_group">Create a new group</string>
     <string name="remove_from_group">Remove from group</string>
+    <string name="no_group_participants">This group is empty</string>
+    <string name="add_contacts">Add contacts</string>
+    <string name="no_group_created">There are no contact groups on the device</string>
+    <string name="create_group">Create group</string>
 
     <!-- Photo -->
     <string name="take_photo">Take photo</string>