add some initial things related to filtering what fields should be visible

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

@@ -23,6 +23,7 @@ class SettingsActivity : SimpleActivity() {
         super.onResume()
 
         setupCustomizeColors()
+        setupManageShownContactFields()
         setupUseEnglish()
         setupAvoidWhatsNew()
         setupShowInfoBubble()
@@ -39,6 +40,12 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
+    private fun setupManageShownContactFields() {
+        settings_manage_contact_fields_holder.setOnClickListener {
+
+        }
+    }
+
     private fun setupUseEnglish() {
         settings_use_english_holder.beVisibleIf(config.wasUseEnglishToggled || Locale.getDefault().language != "en")
         settings_use_english.isChecked = config.useEnglish

app/src/main/kotlin/com/simplemobiletools/contacts/helpers/Config.kt

@@ -41,4 +41,9 @@ class Config(context: Context) : BaseConfig(context) {
     var onContactClick: Int
         get() = prefs.getInt(ON_CONTACT_CLICK, ON_CLICK_VIEW_CONTACT)
         set(onContactClick) = prefs.edit().putInt(ON_CONTACT_CLICK, onContactClick).apply()
+
+    var showContactFields: Int
+        get() = prefs.getInt(SHOW_CONTACT_FIELDS, SHOW_FIRST_NAME_FIELD or SHOW_SURNAME_FIELD or SHOW_PHONE_NUMBERS_FIELD or SHOW_EMAILS_FIELD or
+                SHOW_ADDRESSES_FIELD or SHOW_EVENTS_FIELD or SHOW_NOTES_FIELD or SHOW_GROUPS_FIELD or SHOW_CONTACT_SOURCE_FIELD)
+        set(showContactFields) = prefs.edit().putInt(SHOW_CONTACT_FIELDS, showContactFields).apply()
 }

app/src/main/kotlin/com/simplemobiletools/contacts/helpers/Constants.kt

@@ -9,6 +9,7 @@ const val LAST_USED_CONTACT_SOURCE = "last_used_contact_source"
 const val LOCAL_ACCOUNT_NAME = "local_account_name"
 const val LOCAL_ACCOUNT_TYPE = "local_account_type"
 const val ON_CONTACT_CLICK = "on_contact_click"
+const val SHOW_CONTACT_FIELDS = "show_contact_fields"
 
 const val CONTACT_ID = "contact_id"
 const val SMT_PRIVATE = "smt_private"   // used at the contact source of local contacts hidden from other apps
@@ -66,3 +67,18 @@ const val VOICE = "VOICE"
 const val ON_CLICK_CALL_CONTACT = 1
 const val ON_CLICK_VIEW_CONTACT = 2
 const val ON_CLICK_EDIT_CONTACT = 3
+
+// visible fields filtering
+const val SHOW_PREFIX_FIELD = 1
+const val SHOW_FIRST_NAME_FIELD = 2
+const val SHOW_MIDDLE_NAME_FIELD = 4
+const val SHOW_SURNAME_FIELD = 8
+const val SHOW_SUFFIX_FIELD = 16
+const val SHOW_PHONE_NUMBERS_FIELD = 32
+const val SHOW_EMAILS_FIELD = 64
+const val SHOW_ADDRESSES_FIELD = 128
+const val SHOW_EVENTS_FIELD = 256
+const val SHOW_NOTES_FIELD = 512
+const val SHOW_ORGANIZATION_FIELD = 1024
+const val SHOW_GROUPS_FIELD = 2048
+const val SHOW_CONTACT_SOURCE_FIELD = 4096

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

@@ -33,6 +33,28 @@
 
         </RelativeLayout>
 
+        <RelativeLayout
+            android:id="@+id/settings_manage_contact_fields_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:paddingBottom="@dimen/activity_margin"
+            android:paddingLeft="@dimen/normal_margin"
+            android:paddingRight="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MyTextView
+                android:id="@+id/settings_manage_contact_fields"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerVertical="true"
+                android:paddingLeft="@dimen/medium_margin"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/manage_shown_contact_fields"/>
+
+        </RelativeLayout>
+
         <RelativeLayout
             android:id="@+id/settings_use_english_holder"
             android:layout_width="match_parent"