Add Tasks.org support

app/src/main/AndroidManifest.xml

@@ -110,6 +110,19 @@
                 android:resource="@xml/sync_tasks"/>
         </service>
 
+        <service
+            android:name=".syncadapter.TasksOrgSyncAdapterService"
+            android:exported="true"
+            tools:ignore="ExportedService">
+            <intent-filter>
+                <action android:name="android.content.SyncAdapter"/>
+            </intent-filter>
+
+            <meta-data
+                android:name="android.content.SyncAdapter"
+                android:resource="@xml/sync_tasks_org"/>
+        </service>
+
 
         <!-- Address book account -->
         <service

app/src/main/java/com/etesync/syncadapter/App.kt

@@ -24,6 +24,7 @@ import android.provider.ContactsContract
 import androidx.core.content.ContextCompat
 import at.bitfire.ical4android.AndroidCalendar
 import at.bitfire.ical4android.CalendarStorageException
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import at.bitfire.vcard4android.ContactsStorageException
 import com.etesync.syncadapter.log.Logger
 import com.etesync.syncadapter.model.*
@@ -85,8 +86,10 @@ class App : Application() {
             tasksFilter.addDataScheme("package")
             registerReceiver(PackageChangedReceiver(), tasksFilter)
 
-            // check whether a tasks app is currently installed
+            OPENTASK_PROVIDERS.forEach {
-            PackageChangedReceiver.updateTaskSync(this@App)
+                // check whether a tasks app is currently installed
+                PackageChangedReceiver.updateTaskSync(this@App, it)
+            }
         }
     }
 

app/src/main/java/com/etesync/syncadapter/PackageChangedReceiver.kt

@@ -16,6 +16,7 @@ import android.content.Context
 import android.content.Intent
 import android.provider.CalendarContract
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.ProviderName
 import com.etesync.syncadapter.log.Logger
 import com.etesync.syncadapter.resource.LocalTaskList
 
@@ -23,15 +24,18 @@ class PackageChangedReceiver : BroadcastReceiver() {
 
     @SuppressLint("MissingPermission")
     override fun onReceive(context: Context, intent: Intent) {
-        if (Intent.ACTION_PACKAGE_ADDED == intent.action || Intent.ACTION_PACKAGE_FULLY_REMOVED == intent.action)
+        if (Intent.ACTION_PACKAGE_ADDED == intent.action || Intent.ACTION_PACKAGE_FULLY_REMOVED == intent.action) {
-            updateTaskSync(context)
+            TaskProvider.OPENTASK_PROVIDERS.forEach {
+                updateTaskSync(context, it)
+            }
+        }
     }
 
     companion object {
 
-        internal fun updateTaskSync(context: Context) {
+        internal fun updateTaskSync(context: Context, provider: ProviderName) {
-            val tasksInstalled = LocalTaskList.tasksProviderAvailable(context)
+            val tasksInstalled = LocalTaskList.tasksProviderAvailable(context, provider)
-            Logger.log.info("Package (un)installed; OpenTasks provider now available = $tasksInstalled")
+            Logger.log.info("Package (un)installed; ${provider.name} provider now available = $tasksInstalled")
 
             for (account in AccountManager.get(context).getAccountsByType(App.accountType)) {
                 val settings = AccountSettings(context, account)
@@ -40,12 +44,12 @@ class PackageChangedReceiver : BroadcastReceiver() {
                 if (tasksInstalled) {
                     if (calendarSyncInterval == null) {
                         // do nothing atm
-                    } else if (ContentResolver.getIsSyncable(account, TaskProvider.ProviderName.OpenTasks.authority) <= 0) {
+                    } else if (ContentResolver.getIsSyncable(account, provider.authority) <= 0) {
-                        ContentResolver.setIsSyncable(account, TaskProvider.ProviderName.OpenTasks.authority, 1)
+                        ContentResolver.setIsSyncable(account, provider.authority, 1)
-                        settings.setSyncInterval(TaskProvider.ProviderName.OpenTasks.authority, calendarSyncInterval)
+                        settings.setSyncInterval(provider.authority, calendarSyncInterval)
                     }
                 } else {
-                    ContentResolver.setIsSyncable(account, TaskProvider.ProviderName.OpenTasks.authority, 0)
+                    ContentResolver.setIsSyncable(account, provider.authority, 0)
                 }
             }
         }

app/src/main/java/com/etesync/syncadapter/resource/LocalTaskList.kt

@@ -18,6 +18,7 @@ import at.bitfire.ical4android.AndroidTaskList
 import at.bitfire.ical4android.AndroidTaskListFactory
 import at.bitfire.ical4android.CalendarStorageException
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.ProviderName
 import com.etesync.syncadapter.model.JournalEntity
 import org.dmfs.tasks.contract.TaskContract.TaskLists
 import org.dmfs.tasks.contract.TaskContract.Tasks
@@ -30,12 +31,12 @@ class LocalTaskList private constructor(
     companion object {
         val defaultColor = -0x743cb6     // light green 500
 
-        fun tasksProviderAvailable(context: Context): Boolean {
+        fun tasksProviderAvailable(context: Context, provider: ProviderName): Boolean {
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
-                return context.packageManager.resolveContentProvider(TaskProvider.ProviderName.OpenTasks.authority, 0) != null
+                return context.packageManager.resolveContentProvider(provider.authority, 0) != null
             else {
                 try {
-                    TaskProvider.acquire(context, TaskProvider.ProviderName.OpenTasks)?.use {
+                    TaskProvider.acquire(context, provider)?.use {
                         return true
                     }
                 } catch (e: Exception) {

app/src/main/java/com/etesync/syncadapter/syncadapter/RequestSync.kt

@@ -4,12 +4,13 @@ import android.accounts.Account
 import android.content.ContentResolver
 import android.os.Bundle
 import android.provider.CalendarContract
-import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import com.etesync.syncadapter.App
 
 
 fun requestSync(account: Account?) {
-    val authorities = arrayOf(App.addressBooksAuthority, CalendarContract.AUTHORITY, TaskProvider.ProviderName.OpenTasks.authority)
+    val authorities = arrayOf(App.addressBooksAuthority, CalendarContract.AUTHORITY) +
+            OPENTASK_PROVIDERS.map { it.authority }
 
     for (authority in authorities) {
         val extras = Bundle()

app/src/main/java/com/etesync/syncadapter/syncadapter/TasksOrgSyncAdapterService.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright © Ricki Hirner (bitfire web engineering).
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the GNU Public License v3.0
+ * which accompanies this distribution, and is available at
+ * http://www.gnu.org/licenses/gpl.html
+ */
+package com.etesync.syncadapter.syncadapter
+
+import at.bitfire.ical4android.TaskProvider
+
+/**
+ * Synchronization manager for CalDAV collections; handles tasks ({@code VTODO}).
+ */
+class TasksOrgSyncAdapterService: SyncAdapterService() {
+
+    override fun syncAdapter() =
+            TasksSyncAdapterService.TasksSyncAdapter(this, TaskProvider.ProviderName.TasksOrg)
+
+}

app/src/main/java/com/etesync/syncadapter/syncadapter/TasksSyncAdapterService.kt

@@ -17,6 +17,7 @@ import android.os.Build
 import android.os.Bundle
 import at.bitfire.ical4android.AndroidTaskList
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.ProviderName
 import com.etesync.syncadapter.AccountSettings
 import com.etesync.syncadapter.App
 import com.etesync.syncadapter.Constants
@@ -35,18 +36,18 @@ import java.util.*
  */
 class TasksSyncAdapterService: SyncAdapterService() {
 
-    override fun syncAdapter() = TasksSyncAdapter(this)
+    override fun syncAdapter() = TasksSyncAdapter(this, ProviderName.OpenTasks)
-
 
 	class TasksSyncAdapter(
-            context: Context
+            context: Context,
+            private val name: ProviderName
     ): SyncAdapter(context) {
         override val syncErrorTitle = R.string.sync_error_tasks
         override val notificationManager = SyncNotification(context, "journals-tasks", Constants.NOTIFICATION_TASK_SYNC)
 
         override fun onPerformSyncDo(account: Account, extras: Bundle, authority: String, provider: ContentProviderClient, syncResult: SyncResult) {
 
-            val taskProvider = TaskProvider.fromProviderClient(context, provider)
+            val taskProvider = TaskProvider.fromProviderClient(context, provider, name)
 
             // make sure account can be seen by OpenTasks
             if (Build.VERSION.SDK_INT >= 26)

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

@@ -26,6 +26,7 @@ import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.widget.Toolbar
 import androidx.core.content.ContextCompat
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import at.bitfire.vcard4android.ContactsStorageException
 import com.etesync.syncadapter.*
 import com.etesync.journalmanager.Crypto
@@ -378,7 +379,9 @@ class AccountActivity : BaseActivity(), Toolbar.OnMenuItemClickListener, PopupMe
                         info.taskdav = AccountInfo.ServiceInfo()
                         info.taskdav!!.id = id
                         info.taskdav!!.refreshing = davService != null && davService!!.isRefreshing(id) ||
-                                ContentResolver.isSyncActive(account, TaskProvider.ProviderName.OpenTasks.authority)
+                                OPENTASK_PROVIDERS.any {
+                                    ContentResolver.isSyncActive(account, it.authority)
+                                }
                         info.taskdav!!.journals = JournalEntity.getJournals(data, serviceEntity)
                     }
                 }

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

@@ -23,6 +23,7 @@ import androidx.loader.content.AsyncTaskLoader
 import androidx.loader.content.Loader
 import androidx.preference.*
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import com.etesync.syncadapter.*
 import com.etesync.syncadapter.Constants.KEY_ACCOUNT
 import com.etesync.syncadapter.R
@@ -121,7 +122,9 @@ class AccountSettingsActivity : BaseActivity() {
                     val newInterval = java.lang.Long.parseLong(newValue as String)
                     settings.setSyncInterval(App.addressBooksAuthority, newInterval)
                     settings.setSyncInterval(CalendarContract.AUTHORITY, newInterval)
-                    settings.setSyncInterval(TaskProvider.ProviderName.OpenTasks.authority, newInterval)
+                    OPENTASK_PROVIDERS.forEach {
+                        settings.setSyncInterval(it.authority, newInterval)
+                    }
                     loaderManager.restartLoader(0, arguments, this@AccountSettingsFragment)
                     false
                 }

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

@@ -20,6 +20,7 @@ import androidx.loader.app.LoaderManager
 import androidx.loader.content.AsyncTaskLoader
 import androidx.loader.content.Loader
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import com.etesync.syncadapter.*
 import com.etesync.journalmanager.Crypto
 import com.etesync.journalmanager.Exceptions
@@ -84,15 +85,14 @@ class CreateCollectionFragment : DialogFragment(), LoaderManager.LoaderCallbacks
 
         override fun loadInBackground(): Exception? {
             try {
-                var authority: String = ""
-
                 val data = (context.applicationContext as App).data
 
                 // 1. find service ID
-                when (info.enumType){
+                val authorities = when (info.enumType){
-                    CollectionInfo.Type.ADDRESS_BOOK -> authority = App.addressBooksAuthority
+                    CollectionInfo.Type.ADDRESS_BOOK -> listOf(App.addressBooksAuthority)
-                    CollectionInfo.Type.CALENDAR -> authority = CalendarContract.AUTHORITY
+                    CollectionInfo.Type.CALENDAR -> listOf(CalendarContract.AUTHORITY)
-                    CollectionInfo.Type.TASKS -> authority = TaskProvider.ProviderName.OpenTasks.authority
+                    CollectionInfo.Type.TASKS -> OPENTASK_PROVIDERS.map { it.authority }
+                    else -> emptyList()
                 }
 
                 val serviceEntity = JournalModel.Service.fetchOrCreate(data, account.name, info.enumType)
@@ -127,7 +127,7 @@ class CreateCollectionFragment : DialogFragment(), LoaderManager.LoaderCallbacks
                     journalManager.update(journal)
                 }
 
-                requestSync(authority)
+                authorities.forEach { requestSync(it) }
             } catch (e: IllegalStateException) {
                 return e
             } catch (e: Exceptions.HttpException) {

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

@@ -25,6 +25,7 @@ import android.view.Menu
 import android.view.MenuItem
 import android.widget.TextView
 import androidx.core.content.ContextCompat
+import at.bitfire.ical4android.TaskProvider.ProviderName
 import at.bitfire.vcard4android.ContactsStorageException
 import com.etesync.syncadapter.*
 import com.etesync.syncadapter.Constants.KEY_ACCOUNT
@@ -156,7 +157,7 @@ class DebugInfoActivity : BaseActivity(), LoaderManager.LoaderCallbacks<String>
                         .append(if (powerManager.isIgnoringBatteryOptimizations(BuildConfig.APPLICATION_ID)) "yes" else "no")
                         .append("\n")
             // permissions
-            for (permission in arrayOf(Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS, Manifest.permission.READ_CALENDAR, Manifest.permission.WRITE_CALENDAR, PermissionsActivity.PERMISSION_READ_TASKS, PermissionsActivity.PERMISSION_WRITE_TASKS))
+            for (permission in arrayOf(Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS, Manifest.permission.READ_CALENDAR, Manifest.permission.WRITE_CALENDAR) + ProviderName.OpenTasks.permissions + ProviderName.TasksOrg.permissions)
                 report.append(permission).append(" permission: ")
                         .append(if (ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED) "granted" else "denied")
                         .append("\n")
@@ -169,7 +170,7 @@ class DebugInfoActivity : BaseActivity(), LoaderManager.LoaderCallbacks<String>
             for (acct in accountManager.getAccountsByType(context.getString(R.string.account_type)))
                 try {
                     val settings = AccountSettings(context, acct)
-                    report.append("Account: ").append(acct.name).append("\n" + "  Address book sync. interval: ").append(syncStatus(settings, App.addressBooksAuthority)).append("\n" + "  Calendar     sync. interval: ").append(syncStatus(settings, CalendarContract.AUTHORITY)).append("\n" + "  OpenTasks    sync. interval: ").append(syncStatus(settings, "org.dmfs.tasks")).append("\n" + "  WiFi only: ").append(settings.syncWifiOnly)
+                    report.append("Account: ").append(acct.name).append("\n" + "  Address book sync. interval: ").append(syncStatus(settings, App.addressBooksAuthority)).append("\n" + "  Calendar     sync. interval: ").append(syncStatus(settings, CalendarContract.AUTHORITY)).append("\n" + "  OpenTasks    sync. interval: ").append(syncStatus(settings, ProviderName.OpenTasks.authority)).append("\n" + "  Tasks.org    sync. interval: ").append(syncStatus(settings, ProviderName.TasksOrg.authority)).append("\n" + "  WiFi only: ").append(settings.syncWifiOnly)
                     if (settings.syncWifiOnlySSID != null)
                         report.append(", SSID: ").append(settings.syncWifiOnlySSID)
                     report.append("\n  [CardDAV] Contact group method: ").append(settings.groupMethod)

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

@@ -19,6 +19,7 @@ import at.bitfire.ical4android.Event
 import at.bitfire.ical4android.InvalidCalendarException
 import at.bitfire.ical4android.Task
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import at.bitfire.vcard4android.Contact
 import com.etesync.syncadapter.App
 import com.etesync.syncadapter.Constants
@@ -116,15 +117,17 @@ class JournalItemActivity : BaseActivity(), Refreshable {
                 }
             }
             CollectionInfo.Type.TASKS -> {
-                val provider = TaskProvider.acquire(this, TaskProvider.ProviderName.OpenTasks)!!
+                OPENTASK_PROVIDERS.forEach {
-                val localTaskList = LocalTaskList.findByName(account, provider, LocalTaskList.Factory, info.uid!!)!!
+                    val provider = TaskProvider.acquire(this, it)!!
-                val task = Task.tasksFromReader(StringReader(syncEntry.content))[0]
+                    val localTaskList = LocalTaskList.findByName(account, provider, LocalTaskList.Factory, info.uid!!)!!
-                var localTask = localTaskList.findByUid(task.uid!!)
+                    val task = Task.tasksFromReader(StringReader(syncEntry.content))[0]
-                if (localTask != null) {
+                    var localTask = localTaskList.findByUid(task.uid!!)
-                    localTask.updateAsDirty(task)
+                    if (localTask != null) {
-                } else {
+                        localTask.updateAsDirty(task)
-                    localTask = LocalTask(localTaskList, task, task.uid, null)
+                    } else {
-                    localTask.addAsDirty()
+                        localTask = LocalTask(localTaskList, task, task.uid, null)
+                        localTask.addAsDirty()
+                    }
                 }
             }
             CollectionInfo.Type.ADDRESS_BOOK -> {

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

@@ -13,8 +13,11 @@ import android.app.Activity
 import android.content.pm.PackageManager
 import android.os.Bundle
 import android.view.View
+import androidx.annotation.IdRes
 import androidx.core.app.ActivityCompat
 import androidx.core.app.NotificationManagerCompat
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
+import at.bitfire.ical4android.TaskProvider.ProviderName
 import com.etesync.syncadapter.Constants
 import com.etesync.syncadapter.R
 import com.etesync.syncadapter.resource.LocalTaskList
@@ -38,16 +41,10 @@ class PermissionsActivity : BaseActivity() {
         val noContactsPermissions = ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED || ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_CONTACTS) != PackageManager.PERMISSION_GRANTED
         findViewById<View>(R.id.contacts_permissions).visibility = if (noContactsPermissions) View.VISIBLE else View.GONE
 
-        val noTaskPermissions: Boolean
+        val needOpenTaskPermissions = setupPermissions(ProviderName.OpenTasks, R.id.opentasks_permissions)
-        if (LocalTaskList.tasksProviderAvailable(this)) {
+        val needTasksOrgPermissions = setupPermissions(ProviderName.TasksOrg, R.id.tasksorg_permissions)
-            noTaskPermissions = ActivityCompat.checkSelfPermission(this, PERMISSION_READ_TASKS) != PackageManager.PERMISSION_GRANTED || ActivityCompat.checkSelfPermission(this, PERMISSION_WRITE_TASKS) != PackageManager.PERMISSION_GRANTED
-            findViewById<View>(R.id.opentasks_permissions).visibility = if (noTaskPermissions) View.VISIBLE else View.GONE
-        } else {
-            findViewById<View>(R.id.opentasks_permissions).visibility = View.GONE
-            noTaskPermissions = false
-        }
 
-        if (!noCalendarPermissions && !noContactsPermissions && !noTaskPermissions) {
+        if (!noCalendarPermissions && !noContactsPermissions && !(needOpenTaskPermissions || needTasksOrgPermissions)) {
             val nm = NotificationManagerCompat.from(this)
             nm.cancel(Constants.NOTIFICATION_PERMISSIONS)
 
@@ -55,6 +52,15 @@ class PermissionsActivity : BaseActivity() {
         }
     }
 
+    private fun setupPermissions(provider: ProviderName, @IdRes id: Int): Boolean {
+        val providerAvailable = LocalTaskList.tasksProviderAvailable(this, provider)
+        val hasPermissions = providerAvailable && provider.permissions.all {
+            ActivityCompat.checkSelfPermission(this, it) == PackageManager.PERMISSION_GRANTED
+        }
+        findViewById<View>(id).visibility = if (hasPermissions) View.GONE else View.VISIBLE
+        return providerAvailable && !hasPermissions
+    }
+
     fun requestCalendarPermissions(v: View) {
         ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_CALENDAR, Manifest.permission.WRITE_CALENDAR), 0)
     }
@@ -64,7 +70,11 @@ class PermissionsActivity : BaseActivity() {
     }
 
     fun requestOpenTasksPermissions(v: View) {
-        ActivityCompat.requestPermissions(this, arrayOf(PERMISSION_READ_TASKS, PERMISSION_WRITE_TASKS), 0)
+        ActivityCompat.requestPermissions(this, ProviderName.OpenTasks.permissions, 0)
+    }
+
+    fun requestTasksOrgPermissions(v: View) {
+        ActivityCompat.requestPermissions(this, ProviderName.TasksOrg.permissions, 0)
     }
 
     override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
@@ -75,11 +85,8 @@ class PermissionsActivity : BaseActivity() {
     companion object {
         private val REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 124
 
-        val PERMISSION_READ_TASKS = "org.dmfs.permission.READ_TASKS"
-        val PERMISSION_WRITE_TASKS = "org.dmfs.permission.WRITE_TASKS"
-
         fun requestAllPermissions(activity: Activity) {
-            ActivityCompat.requestPermissions(activity, arrayOf(Manifest.permission.READ_CALENDAR, Manifest.permission.WRITE_CALENDAR, Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS, PERMISSION_READ_TASKS, PERMISSION_WRITE_TASKS), REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS)
+            ActivityCompat.requestPermissions(activity, arrayOf(Manifest.permission.READ_CALENDAR, Manifest.permission.WRITE_CALENDAR, Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS) + OPENTASK_PROVIDERS.flatMap { it.permissions.toList() }, REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS)
         }
     }
 }

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

@@ -24,6 +24,7 @@ import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import at.bitfire.ical4android.CalendarStorageException
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import at.bitfire.vcard4android.ContactsStorageException
 import com.etesync.syncadapter.App
 import com.etesync.syncadapter.Constants
@@ -212,7 +213,9 @@ class ViewCollectionActivity : BaseActivity(), Refreshable {
                 }
                 CollectionInfo.Type.TASKS -> {
                     try {
-                        val providerClient = TaskProvider.acquire(this@ViewCollectionActivity, TaskProvider.ProviderName.OpenTasks)
+                        val providerClient = OPENTASK_PROVIDERS.mapNotNull {
+                            TaskProvider.acquire(this@ViewCollectionActivity, it)
+                        }.firstOrNull()
                         if (providerClient == null) {
                             return null
                         }

app/src/main/java/com/etesync/syncadapter/ui/importlocal/ImportFragment.kt

@@ -15,6 +15,7 @@ import android.provider.CalendarContract
 import android.provider.ContactsContract
 import androidx.fragment.app.DialogFragment
 import at.bitfire.ical4android.*
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import at.bitfire.vcard4android.BatchOperation
 import at.bitfire.vcard4android.Contact
 import at.bitfire.vcard4android.ContactsStorageException
@@ -282,40 +283,44 @@ class ImportFragment : DialogFragment() {
 
                     finishParsingFile(tasks.size)
 
-                    val provider = TaskProvider.acquire(context, TaskProvider.ProviderName.OpenTasks)
+                    val providers = OPENTASK_PROVIDERS.mapNotNull {
-                    if (provider == null) {
+                        TaskProvider.acquire(context, it)
+                    }
+                    if (providers.isEmpty()) {
                         result.e = Exception("Failed to acquire tasks content provider.")
                         return result
                     }
 
-                    val localTaskList: LocalTaskList?
+                    providers.forEach {
-                    try {
+                        val localTaskList: LocalTaskList?
-                        localTaskList = LocalTaskList.findByName(account, provider, LocalTaskList.Factory, info.uid!!)
-                        if (localTaskList == null) {
-                            throw FileNotFoundException("Failed to load local resource.")
-                        }
-                    } catch (e: FileNotFoundException) {
-                        Logger.log.info("Fail" + e.localizedMessage)
-                        result.e = e
-                        return result
-                    }
-
-                    for (task in tasks) {
                         try {
-                            var localTask = localTaskList.findByUid(task.uid!!)
+                            localTaskList = LocalTaskList.findByName(account, it, LocalTaskList.Factory, info.uid!!)
-                            if (localTask != null) {
+                            if (localTaskList == null) {
-                                localTask.updateAsDirty(task)
+                                throw FileNotFoundException("Failed to load local resource.")
-                                result.updated++
-                            } else {
-                                localTask = LocalTask(localTaskList, task, task.uid, null)
-                                localTask.addAsDirty()
-                                result.added++
                             }
-                        } catch (e: CalendarStorageException) {
+                        } catch (e: FileNotFoundException) {
-                            e.printStackTrace()
+                            Logger.log.info("Fail" + e.localizedMessage)
+                            result.e = e
+                            return result
                         }
 
-                        entryProcessed()
+                        for (task in tasks) {
+                            try {
+                                var localTask = localTaskList.findByUid(task.uid!!)
+                                if (localTask != null) {
+                                    localTask.updateAsDirty(task)
+                                    result.updated++
+                                } else {
+                                    localTask = LocalTask(localTaskList, task, task.uid, null)
+                                    localTask.addAsDirty()
+                                    result.added++
+                                }
+                            } catch (e: CalendarStorageException) {
+                                e.printStackTrace()
+                            }
+
+                            entryProcessed()
+                        }
                     }
                 } else if (info.enumType == CollectionInfo.Type.ADDRESS_BOOK) {
                     val uidToLocalId = HashMap<String?, Long>()

app/src/main/java/com/etesync/syncadapter/ui/setup/SetupEncryptionFragment.kt

@@ -21,6 +21,7 @@ import android.provider.CalendarContract
 import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.DialogFragment
 import at.bitfire.ical4android.TaskProvider
+import at.bitfire.ical4android.TaskProvider.Companion.OPENTASK_PROVIDERS
 import com.etesync.syncadapter.*
 import com.etesync.journalmanager.Crypto
 import com.etesync.journalmanager.Exceptions
@@ -153,11 +154,13 @@ class SetupEncryptionFragment : DialogFragment() {
                 // calendar sync is automatically enabled by isAlwaysSyncable="true" in res/xml/sync_contacts.xml
                 settings.setSyncInterval(CalendarContract.AUTHORITY, Constants.DEFAULT_SYNC_INTERVAL.toLong())
 
-                // enable task sync if OpenTasks is installed
+                OPENTASK_PROVIDERS.forEach {
-                // further changes will be handled by PackageChangedReceiver
+                    // enable task sync if OpenTasks is installed
-                if (LocalTaskList.tasksProviderAvailable(context!!)) {
+                    // further changes will be handled by PackageChangedReceiver
-                    ContentResolver.setIsSyncable(account, TaskProvider.ProviderName.OpenTasks.authority, 1)
+                    if (LocalTaskList.tasksProviderAvailable(context!!, it)) {
-                    settings.setSyncInterval(TaskProvider.ProviderName.OpenTasks.authority, Constants.DEFAULT_SYNC_INTERVAL.toLong())
+                        ContentResolver.setIsSyncable(account, it.authority, 1)
+                        settings.setSyncInterval(it.authority, Constants.DEFAULT_SYNC_INTERVAL.toLong())
+                    }
                 }
             } else {
                 ContentResolver.setIsSyncable(account, CalendarContract.AUTHORITY, 0)

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

@@ -77,6 +77,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="vertical"
+            android:layout_marginBottom="16dp"
             tools:ignore="UselessParent">
 
             <TextView
@@ -98,6 +99,31 @@
 
         </LinearLayout>
 
+        <LinearLayout
+          android:id="@+id/tasksorg_permissions"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content"
+          android:orientation="vertical"
+          tools:ignore="UselessParent">
+
+            <TextView
+              android:layout_width="match_parent"
+              android:layout_height="wrap_content"
+              style="@style/TextView.Heading"
+              android:text="@string/permissions_tasks_org"/>
+
+            <TextView
+              android:layout_width="match_parent"
+              android:layout_height="wrap_content"
+              android:text="@string/permissions_tasks_org_details"/>
+
+            <Button
+              android:layout_width="wrap_content"
+              android:layout_height="wrap_content"
+              android:text="@string/permissions_tasks_org_request"
+              android:onClick="requestTasksOrgPermissions"/>
+
+        </LinearLayout>
     </LinearLayout>
 
 </ScrollView>

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

@@ -196,6 +196,9 @@
     <string name="permissions_opentasks">OpenTasks permissions</string>
     <string name="permissions_opentasks_details">To synchronize tasks with your local task lists, EteSync needs to access OpenTasks.</string>
     <string name="permissions_opentasks_request">Request OpenTasks permissions</string>
+    <string name="permissions_tasks_org">Tasks.org permissions</string>
+    <string name="permissions_tasks_org_details">To synchronize tasks with your local task lists, EteSync needs to access Tasks.org.</string>
+    <string name="permissions_tasks_org_request">Request Tasks.org permissions</string>
 
     <!-- AddAccountActivity -->
     <string name="login_title">Add account</string>

app/src/main/res/xml/sync_tasks_org.xml

@@ -0,0 +1,12 @@
+<!--
+  ~ Copyright © Ricki Hirner (bitfire web engineering).
+  ~ All rights reserved. This program and the accompanying materials
+  ~ are made available under the terms of the GNU Public License v3.0
+  ~ which accompanies this distribution, and is available at
+  ~ http://www.gnu.org/licenses/gpl.html
+  -->
+
+<sync-adapter xmlns:android="http://schemas.android.com/apk/res/android"
+    android:accountType="@string/account_type"
+    android:contentAuthority="org.tasks.opentasks"
+    android:supportsUploading="true" />

ical4android

@@ -1 +1 @@
-Subproject commit c0459f905571ab2e08e8af9ac40a96200d8cb862
+Subproject commit 0a070c7866792756d90be429522127ef9108eff8