Add settings

app/build.gradle

@@ -47,6 +47,7 @@ dependencies {
     implementation 'androidx.navigation:navigation-ui-ktx:2.1.0'
     implementation "androidx.work:work-runtime-ktx:2.2.0"
     implementation "androidx.room:room-runtime:2.2.0-rc01"
+    implementation 'androidx.preference:preference:1.1.0'
     kapt "androidx.room:room-compiler:2.2.0-rc01"
     implementation "androidx.room:room-ktx:2.2.0-rc01"
     testImplementation 'junit:junit:4.12'

app/src/main/AndroidManifest.xml

@@ -12,6 +12,10 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <activity
+            android:name=".SettingsActivity"
+            android:parentActivityName=".MainActivity"
+            android:label="@string/title_settings"></activity>
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name">
@@ -25,6 +29,7 @@
             android:name=".LicensesActivity"
             android:label="@string/title_licenses"
             android:parentActivityName=".MainActivity" />
+
         <receiver android:name=".BootCompleteReceiver">
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED" />

app/src/main/java/net/underdesk/circolapp/MainActivity.kt

@@ -103,6 +103,10 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         // Handle item selection
         return when (item.itemId) {
+            R.id.menu_main_settings -> {
+                startActivity(Intent(this, SettingsActivity::class.java))
+                true
+            }
             R.id.menu_main_about -> {
                 showInfoDialog()
                 true

app/src/main/java/net/underdesk/circolapp/SettingsActivity.kt

@@ -0,0 +1,76 @@
+/*
+ * Circolapp
+ * Copyright (C) 2019  Matteo Schiff
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.underdesk.circolapp
+
+import android.os.Bundle
+import android.text.InputType
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.preference.EditTextPreference
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.SwitchPreferenceCompat
+import net.underdesk.circolapp.works.PollWork
+
+class SettingsActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.settings_activity)
+        supportFragmentManager
+            .beginTransaction()
+            .replace(R.id.settings, SettingsFragment())
+            .commit()
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    }
+
+    class SettingsFragment : PreferenceFragmentCompat() {
+        override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+            setPreferencesFromResource(R.xml.root_preferences, rootKey)
+
+            val darkThemePreference = findPreference<Preference>("dark_theme")
+            val listener =
+                Preference.OnPreferenceChangeListener { _, value ->
+                    when (value) {
+                        "auto" -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM)
+                        "enabled" -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
+                        "disabled" -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO)
+                    }
+                    true
+                }
+            darkThemePreference?.onPreferenceChangeListener = listener
+
+            val pollIntervalPreference = findPreference<EditTextPreference>("poll_interval")
+            pollIntervalPreference?.setOnBindEditTextListener { editText ->
+                editText.inputType = InputType.TYPE_CLASS_NUMBER
+            }
+
+            val notificationPreference =
+                findPreference<SwitchPreferenceCompat>("notify_new_circulars")
+
+            val notificationPrefChangedListener =
+                Preference.OnPreferenceChangeListener { _, _ ->
+                    activity?.let { PollWork.enqueue(it) }
+                    true
+                }
+            pollIntervalPreference?.onPreferenceChangeListener = notificationPrefChangedListener
+            notificationPreference?.onPreferenceChangeListener = notificationPrefChangedListener
+        }
+    }
+}

app/src/main/java/net/underdesk/circolapp/works/PollWork.kt

@@ -27,6 +27,7 @@ import android.net.Uri
 import android.os.Build
 import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
+import androidx.preference.PreferenceManager
 import androidx.work.*
 import net.underdesk.circolapp.R
 import net.underdesk.circolapp.data.AppDatabase
@@ -46,13 +47,13 @@ class PollWork(appContext: Context, workerParams: WorkerParameters) :
         private const val repeatIntervalMin: Long = 15
         private const val flexIntervalMin: Long = 10
 
-        private fun getPollWorkRequest(): PeriodicWorkRequest {
+        private fun getPollWorkRequest(repeatInterval: Long): PeriodicWorkRequest {
             val constraints = Constraints.Builder()
                 .setRequiredNetworkType(NetworkType.CONNECTED)
                 .build()
 
             return PeriodicWorkRequestBuilder<PollWork>(
-                repeatIntervalMin,
+                repeatInterval,
                 TimeUnit.MINUTES,
                 flexIntervalMin,
                 TimeUnit.MINUTES
@@ -60,12 +61,24 @@ class PollWork(appContext: Context, workerParams: WorkerParameters) :
         }
 
         fun enqueue(context: Context) {
+            val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
+
+            if (sharedPreferences.getBoolean("notify_new_circulars", true)) {
                 WorkManager.getInstance(context)
                     .enqueueUniquePeriodicWork(
                         pollWorkName,
                         ExistingPeriodicWorkPolicy.KEEP,
-                    getPollWorkRequest()
+                        getPollWorkRequest(
+                            sharedPreferences.getString(
+                                "poll_interval",
+                                null
+                            )?.toLong() ?: repeatIntervalMin
                         )
+                    )
+            } else {
+                WorkManager.getInstance(context)
+                    .cancelUniqueWork(pollWorkName)
+            }
         }
     }
 

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

@@ -0,0 +1,9 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <FrameLayout
+        android:id="@+id/settings"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+</LinearLayout>

app/src/main/res/menu/menu_main.xml

@@ -8,6 +8,9 @@
         android:title="@string/menu_search"
         app:actionViewClass="androidx.appcompat.widget.SearchView"
         app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/menu_main_settings"
+        android:title="@string/title_settings" />
     <item
         android:id="@+id/menu_main_about"
         android:title="@string/menu_about" />

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

@@ -0,0 +1,13 @@
+<resources>
+    <string-array name="dark_theme_entries">
+        <item>Automatic</item>
+        <item>Enabled</item>
+        <item>Disabled</item>
+    </string-array>
+
+    <string-array name="dark_theme_values">
+        <item>auto</item>
+        <item>enabled</item>
+        <item>disabled</item>
+    </string-array>
+</resources>

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

@@ -4,10 +4,19 @@
     <string name="title_favourites">Favourites</string>
     <string name="title_reminders">Reminders</string>
     <string name="title_licenses">Third party licenses</string>
+    <string name="title_settings">Settings</string>
 
     <string name="menu_about">About</string>
     <string name="menu_search">Search</string>
 
+    <string name="preferences_general_header">General</string>
+    <string name="preference_notifications_header">Notifications</string>
+    <string name="preferences_dark_theme">Dark theme</string>
+    <string name="preferences_notify_new_circulars">Show notifications</string>
+    <string name="preferences_poll_interval">Synchronization interval</string>
+    <string name="preferences_notify_new_circulars_summary">Show a notification when a new circular is published</string>
+    <string name="preferences_poll_interval_summary">How long to wait before checking if new circulars are published</string>
+
     <string name="notification_title">Circular letter number %1$d</string>
     <string name="notification_summary_title">New circulars published</string>
     <string name="notification_summary">New circulars</string>

app/src/main/res/xml/root_preferences.xml

@@ -0,0 +1,35 @@
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <PreferenceCategory app:title="@string/preferences_general_header">
+
+        <ListPreference
+            app:defaultValue="auto"
+            app:entries="@array/dark_theme_entries"
+            app:entryValues="@array/dark_theme_values"
+            app:key="dark_theme"
+            app:title="@string/preferences_dark_theme"
+            app:useSimpleSummaryProvider="true" />
+
+    </PreferenceCategory>
+
+    <PreferenceCategory app:title="@string/preference_notifications_header">
+
+        <SwitchPreferenceCompat
+            android:defaultValue="true"
+            android:summary="@string/preferences_notify_new_circulars_summary"
+            app:key="notify_new_circulars"
+            app:title="@string/preferences_notify_new_circulars" />
+
+        <EditTextPreference
+            android:defaultValue="15"
+            android:dependency="notify_new_circulars"
+            android:key="poll_interval"
+            android:selectAllOnFocus="true"
+            android:singleLine="true"
+            android:summary="@string/preferences_poll_interval_summary"
+            android:title="@string/preferences_poll_interval" />
+
+    </PreferenceCategory>
+
+</PreferenceScreen>