Add a notice about only OpenTasks lists showing in app.

app/src/main/java/com/etesync/syncadapter/ui/AccountActivity.kt

@@ -272,6 +272,11 @@ class AccountActivity : BaseActivity(), Toolbar.OnMenuItemClickListener, PopupMe
             adapter.addAll(info.taskdav!!.journals!!)
             listTaskDAV!!.adapter = adapter
             listTaskDAV!!.onItemClickListener = onItemClickListener
+
+            if (!packageInstalled(this, openTasksPackage)) {
+                val opentasksWarning = findViewById<View>(R.id.taskdav_opentasks_warning)
+                opentasksWarning.visibility = View.VISIBLE
+            }
         }
     }
 

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

@@ -131,6 +131,18 @@
                     android:indeterminate="true"
                     android:visibility="gone" />
 
+                <TextView
+                    android:id="@+id/taskdav_opentasks_warning"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:textAppearance="?android:attr/textAppearanceMedium"
+                    android:paddingTop="8dp"
+                    android:paddingBottom="8dp"
+                    android:paddingLeft="12dp"
+                    android:paddingRight="12dp"
+                    android:text="@string/account_tasks_not_showing"
+                    android:visibility="gone" />
+
                 <com.etesync.syncadapter.ui.widget.MaximizedListView
                     android:id="@+id/tasklists"
                     android:layout_width="match_parent"

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

@@ -130,6 +130,7 @@
     <string name="account_delete_collection_last_text">Deleting the last collection is not allowed, please create a new one if you\'d like to delete this one.</string>
     <string name="account_showcase_view_collection">You can click on an item to view the collection. From there you can view the journal, import, and much more...</string>
     <string name="account_click_install_tasks">Click here to install OpenTasks!</string>
+    <string name="account_tasks_not_showing">* Only OpenTasks lists are shown below</string>
 
     <string name="show_fingperprint_title">My Fingerprint</string>