Add option to enable notifications during Doze

Closes #341

src/main/java/com/todoroo/andlib/utility/AndroidUtilities.java

@@ -367,10 +367,18 @@ public class AndroidUtilities {
         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
     }
 
+    public static boolean atLeastKitKat() {
+        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
+    }
+
     public static boolean atLeastLollipop() {
         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
     }
 
+    public static boolean atLeastMarshmallow() {
+        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
+    }
+
     /**
      * Sort files by date so the newest file is on top
      */

src/main/java/com/todoroo/astrid/reminders/ReminderPreferences.java

@@ -27,6 +27,7 @@ import org.tasks.ui.TimePreference;
 
 import javax.inject.Inject;
 
+import static com.todoroo.andlib.utility.AndroidUtilities.atLeastMarshmallow;
 import static com.todoroo.andlib.utility.AndroidUtilities.preJellybean;
 
 public class ReminderPreferences extends InjectingPreferenceActivity {
@@ -38,6 +39,7 @@ public class ReminderPreferences extends InjectingPreferenceActivity {
 
     public static String RESET_GEOFENCES = "reset_geofences";
     public static String TOGGLE_GEOFENCES = "toggle_geofences";
+    public static String RESCHEDULE_ALARMS = "reschedule_alarms";
     private Bundle result;
 
     @Inject DeviceInfo deviceInfo;
@@ -59,6 +61,11 @@ public class ReminderPreferences extends InjectingPreferenceActivity {
             preferenceScreen.removePreference(findPreference(getString(R.string.p_rmd_notif_actions_enabled)));
             preferenceScreen.removePreference(findPreference(getString(R.string.p_notification_priority)));
         }
+        if (atLeastMarshmallow()) {
+            setExtraOnChange(R.string.p_doze_notifications, RESCHEDULE_ALARMS);
+        } else {
+            preferenceScreen.removePreference(findPreference(getString(R.string.p_doze_notifications)));
+        }
 
         if (deviceInfo.supportsLocationServices()) {
             setExtraOnChange(R.string.p_geofence_radius, RESET_GEOFENCES);

src/main/java/org/tasks/preferences/Preferences.java

@@ -29,6 +29,7 @@ import timber.log.Timber;
 
 import static android.content.SharedPreferences.Editor;
 import static com.todoroo.andlib.utility.AndroidUtilities.atLeastJellybean;
+import static com.todoroo.andlib.utility.AndroidUtilities.atLeastMarshmallow;
 
 public class Preferences {
 
@@ -99,6 +100,10 @@ public class Preferences {
         return getStringValue(R.string.gcal_p_default);
     }
 
+    public boolean isDozeNotificationEnabled() {
+        return atLeastMarshmallow() && getBoolean(R.string.p_doze_notifications, false);
+    }
+
     public boolean geofencesEnabled() {
         return deviceInfo.supportsLocationServices() && getBoolean(R.string.p_geofence_reminders_enabled, true);
     }

src/main/java/org/tasks/scheduling/AlarmManager.java

@@ -3,16 +3,22 @@ package org.tasks.scheduling;
 import android.app.PendingIntent;
 import android.content.Context;
 
+import org.tasks.R;
 import org.tasks.injection.ForApplication;
+import org.tasks.preferences.Preferences;
 
 import javax.inject.Inject;
 
+import static com.todoroo.andlib.utility.AndroidUtilities.atLeastKitKat;
+
 public class AlarmManager {
 
     private final android.app.AlarmManager alarmManager;
+    private final Preferences preferences;
 
     @Inject
-    public AlarmManager(@ForApplication Context context) {
+    public AlarmManager(@ForApplication Context context, Preferences preferences) {
+        this.preferences = preferences;
         alarmManager = (android.app.AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
     }
 
@@ -21,11 +27,23 @@ public class AlarmManager {
     }
 
     public void wakeup(long time, PendingIntent pendingIntent) {
-        alarmManager.set(android.app.AlarmManager.RTC_WAKEUP, time, pendingIntent);
+        if (preferences.isDozeNotificationEnabled()) {
+            alarmManager.setExactAndAllowWhileIdle(android.app.AlarmManager.RTC_WAKEUP, time, pendingIntent);
+        } else if (atLeastKitKat()) {
+            alarmManager.setExact(android.app.AlarmManager.RTC_WAKEUP, time, pendingIntent);
+        } else {
+            alarmManager.set(android.app.AlarmManager.RTC_WAKEUP, time, pendingIntent);
+        }
     }
 
     public void noWakeup(long time, PendingIntent pendingIntent) {
-        alarmManager.set(android.app.AlarmManager.RTC, time, pendingIntent);
+        if (preferences.isDozeNotificationEnabled()) {
+            alarmManager.setExactAndAllowWhileIdle(android.app.AlarmManager.RTC, time, pendingIntent);
+        } else if (atLeastKitKat()) {
+            alarmManager.setExact(android.app.AlarmManager.RTC, time, pendingIntent);
+        } else {
+            alarmManager.set(android.app.AlarmManager.RTC, time, pendingIntent);
+        }
     }
 
     public void setInexactRepeating(long interval, PendingIntent pendingIntent) {

src/main/java/org/tasks/ui/NavigationDrawerFragment.java

@@ -32,6 +32,7 @@ import org.tasks.injection.InjectingFragment;
 import org.tasks.location.GeofenceService;
 import org.tasks.preferences.AppearancePreferences;
 import org.tasks.preferences.Preferences;
+import org.tasks.scheduling.AlarmSchedulingIntentService;
 
 import javax.inject.Inject;
 
@@ -96,6 +97,9 @@ public class NavigationDrawerFragment extends InjectingFragment {
                 }
             } else if (data.getBooleanExtra(ReminderPreferences.RESET_GEOFENCES, false)) {
                 geofenceService.setupGeofences();
+            } else if (data.getBooleanExtra(ReminderPreferences.RESCHEDULE_ALARMS, false)) {
+                Context context = getContext();
+                context.startService(new Intent(context, AlarmSchedulingIntentService.class));
             }
 
             if (data.getBooleanExtra(AppearancePreferences.FILTERS_CHANGED, false)) {

src/main/res/values/keys.xml

@@ -244,6 +244,7 @@
   <string name="p_manual_sort">manual_sort</string>
   <string name="p_notification_priority">notification_priority</string>
   <string name="p_disable_notification_light">disable_notification_light</string>
+  <string name="p_doze_notifications">doze_notifications</string>
 
   <string-array name="TEA_control_sets_prefs">
         <item>@string/TEA_ctrl_when_pref</item>

src/main/res/values/strings.xml

@@ -138,6 +138,9 @@
     <string name="opt_out">Opt-out</string>
     <string name="tag_already_exists">Tag already exists</string>
     <string name="disable_notification_light">Disable notification light</string>
+    <string name="doze_notifications">Interrupt Doze mode for notifications</string>
+    <string name="doze_notifications_off">Android will significantly delay notifications while device is in Doze mode</string>
+    <string name="doze_notifications_on">Android will allow limited interruptions while device is in Doze mode</string>
 
     <string-array name="sync_SPr_interval_entries">
         <!-- sync_SPr_interval_entries: Synchronization Intervals -->

src/main/res/xml/preferences_reminders.xml

@@ -44,6 +44,13 @@
         android:key="@string/p_rmd_persistent"
         android:summary="@string/persistent_notifications_description"
         android:title="@string/persistent_notifications" />
+    <com.todoroo.astrid.ui.MultilineCheckboxPreference
+        android:defaultValue="false"
+        android:dependency="@string/p_rmd_enabled"
+        android:key="@string/p_doze_notifications"
+        android:summaryOff="@string/doze_notifications_off"
+        android:summaryOn="@string/doze_notifications_on"
+        android:title="@string/doze_notifications" />
     <CheckBoxPreference
         android:defaultValue="false"
         android:dependency="@string/p_rmd_enabled"