add a couple more functions in FragmentInterface

app/src/main/kotlin/com/simplemobiletools/contacts/activities/MainActivity.kt

@@ -26,9 +26,9 @@ import com.simplemobiletools.contacts.dialogs.ImportContactsDialog
 import com.simplemobiletools.contacts.extensions.config
 import com.simplemobiletools.contacts.extensions.dbHelper
 import com.simplemobiletools.contacts.extensions.getTempFile
-import com.simplemobiletools.contacts.fragments.MyViewPagerFragment
 import com.simplemobiletools.contacts.helpers.ContactsHelper
 import com.simplemobiletools.contacts.helpers.VcfExporter
+import com.simplemobiletools.contacts.interfaces.FragmentInterface
 import com.simplemobiletools.contacts.interfaces.RefreshContactsListener
 import com.simplemobiletools.contacts.models.Contact
 import kotlinx.android.synthetic.main.activity_main.*
@@ -93,9 +93,9 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
 
         val configShowContactThumbnails = config.showContactThumbnails
         if (storedShowContactThumbnails != configShowContactThumbnails) {
-            contacts_fragment?.showContactThumbnailsChanged(configShowContactThumbnails)
-            favorites_fragment?.showContactThumbnailsChanged(configShowContactThumbnails)
-            groups_fragment?.showContactThumbnailsChanged(configShowContactThumbnails)
+            getAllFragments().forEach {
+                (it as? FragmentInterface)?.showContactThumbnailsChanged(configShowContactThumbnails)
+            }
         }
 
         val configTextColor = config.textColor
@@ -103,9 +103,9 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
             getInactiveTabIndexes(viewpager.currentItem).forEach {
                 main_tabs_holder.getTabAt(it)?.icon?.applyColorFilter(configTextColor)
             }
-            contacts_fragment?.textColorChanged(configTextColor)
-            favorites_fragment?.textColorChanged(configTextColor)
-            groups_fragment?.textColorChanged(configTextColor)
+            getAllFragments().forEach {
+                (it as? FragmentInterface)?.textColorChanged(configTextColor)
+            }
         }
 
         val configBackgroundColor = config.backgroundColor
@@ -117,9 +117,9 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
         if (storedPrimaryColor != configPrimaryColor) {
             main_tabs_holder.setSelectedTabIndicatorColor(getAdjustedPrimaryColor())
             main_tabs_holder.getTabAt(viewpager.currentItem)?.icon?.applyColorFilter(getAdjustedPrimaryColor())
-            contacts_fragment?.primaryColorChanged(configPrimaryColor)
-            favorites_fragment?.primaryColorChanged(configPrimaryColor)
-            groups_fragment?.primaryColorChanged(configPrimaryColor)
+            getAllFragments().forEach {
+                (it as? FragmentInterface)?.primaryColorChanged(configPrimaryColor)
+            }
         }
 
         val configStartNameWithSurname = config.startNameWithSurname
@@ -133,9 +133,9 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
                 initFragments()
             }
 
-            contacts_fragment?.onActivityResume()
-            favorites_fragment?.onActivityResume()
-            groups_fragment?.onActivityResume()
+            getAllFragments().forEach {
+                (it as? FragmentInterface)?.onActivityResume()
+            }
             refreshContacts(true, true)
         }
 
@@ -197,7 +197,7 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
 
                 override fun onQueryTextChange(newText: String): Boolean {
                     if (isSearchOpen) {
-                        (getCurrentFragment() as? MyViewPagerFragment)?.onSearchQueryChanged(newText)
+                        getCurrentFragment()?.onSearchQueryChanged(newText)
                     }
                     return true
                 }
@@ -206,20 +206,20 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
 
         MenuItemCompat.setOnActionExpandListener(searchMenuItem, object : MenuItemCompat.OnActionExpandListener {
             override fun onMenuItemActionExpand(item: MenuItem?): Boolean {
-                (getCurrentFragment() as? MyViewPagerFragment)?.onSearchOpened()
+                getCurrentFragment()?.onSearchOpened()
                 isSearchOpen = true
                 return true
             }
 
             override fun onMenuItemActionCollapse(item: MenuItem?): Boolean {
-                (getCurrentFragment() as? MyViewPagerFragment)?.onSearchClosed()
+                getCurrentFragment()?.onSearchClosed()
                 isSearchOpen = false
                 return true
             }
         })
     }
 
-    private fun getCurrentFragment() = when (viewpager.currentItem) {
+    private fun getCurrentFragment(): FragmentInterface? = when (viewpager.currentItem) {
         0 -> contacts_fragment
         1 -> favorites_fragment
         else -> groups_fragment
@@ -275,7 +275,7 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
         viewpager.addOnPageChangeListener(object : ViewPager.OnPageChangeListener {
             override fun onPageScrollStateChanged(state: Int) {
                 if (isSearchOpen) {
-                    (getCurrentFragment() as? MyViewPagerFragment)?.onSearchQueryChanged("")
+                    getCurrentFragment()?.onSearchQueryChanged("")
                     searchMenuItem?.collapseActionView()
                 }
             }
@@ -285,8 +285,9 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
 
             override fun onPageSelected(position: Int) {
                 main_tabs_holder.getTabAt(position)?.select()
-                contacts_fragment?.finishActMode()
-                favorites_fragment?.finishActMode()
+                getAllFragments().forEach {
+                    (it as? FragmentInterface)?.finishActMode()
+                }
                 invalidateOptionsMenu()
             }
         })
@@ -425,6 +426,8 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
         }
     }
 
+    private fun getAllFragments() = arrayListOf(contacts_fragment, favorites_fragment, groups_fragment)
+
     override fun refreshFavorites() {
         refreshContacts(false, true)
     }

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

@@ -88,10 +88,23 @@ class GroupsFragment(context: Context, attributeSet: AttributeSet) : Coordinator
         }
     }
 
-    fun onActivityResume() {
+    override fun onActivityResume() {
         updateViewStuff()
     }
 
+    override fun finishActMode() {
+        (groups_list.adapter as? GroupsAdapter)?.finishActMode()
+    }
+
+    override fun onSearchQueryChanged(text: String) {
+    }
+
+    override fun onSearchOpened() {
+    }
+
+    override fun onSearchClosed() {
+    }
+
     private fun updateViewStuff() {
         context.updateTextColors(groups_wrapper.parent as ViewGroup)
         groups_fastscroller.updateBubbleColors()

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

@@ -149,15 +149,15 @@ abstract class MyViewPagerFragment(context: Context, attributeSet: AttributeSet)
         }
     }
 
-    fun onActivityResume() {
+    override fun onActivityResume() {
         updateViewStuff()
     }
 
-    fun finishActMode() {
+    override fun finishActMode() {
         (fragment_list.adapter as? ContactsAdapter)?.finishActMode()
     }
 
-    fun onSearchQueryChanged(text: String) {
+    override fun onSearchQueryChanged(text: String) {
         (fragment_list.adapter as? ContactsAdapter)?.apply {
             val filtered = contactsIgnoringSearch.filter {
                 it.getFullName(startNameWithSurname).contains(text, true) ||
@@ -180,11 +180,11 @@ abstract class MyViewPagerFragment(context: Context, attributeSet: AttributeSet)
         }
     }
 
-    fun onSearchOpened() {
+    override fun onSearchOpened() {
         contactsIgnoringSearch = (fragment_list?.adapter as? ContactsAdapter)?.contactItems ?: ArrayList()
     }
 
-    fun onSearchClosed() {
+    override fun onSearchClosed() {
         (fragment_list.adapter as? ContactsAdapter)?.updateItems(contactsIgnoringSearch)
         if (this is FavoritesFragment) {
             fragment_placeholder.text = activity?.getString(R.string.no_favorites)

app/src/main/kotlin/com/simplemobiletools/contacts/interfaces/FragmentInterface.kt

@@ -6,6 +6,8 @@ import com.simplemobiletools.contacts.models.Contact
 interface FragmentInterface {
     fun setupFragment(activity: MainActivity)
 
+    fun onActivityResume()
+
     fun textColorChanged(color: Int)
 
     fun primaryColorChanged(color: Int)
@@ -13,4 +15,12 @@ interface FragmentInterface {
     fun refreshContacts(contacts: ArrayList<Contact>)
 
     fun showContactThumbnailsChanged(showThumbnails: Boolean)
+
+    fun finishActMode()
+
+    fun onSearchQueryChanged(text: String)
+
+    fun onSearchOpened()
+
+    fun onSearchClosed()
 }