reschedule the notifications after reboot

app/src/main/AndroidManifest.xml

@@ -3,6 +3,8 @@
     package="com.simplemobiletools.calendar"
     xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/launcher"
@@ -60,7 +62,14 @@
                 android:resource="@xml/widget_info"/>
         </receiver>
 
-        <receiver android:name=".NotificationPublisher"/>
+        <receiver android:name=".receivers.NotificationReceiver"/>
+
+        <receiver android:name=".receivers.BootCompletedReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED"/>
+                <action android:name="android.intent.action.QUICKBOOT_POWERON"/>
+            </intent-filter>
+        </receiver>
 
     </application>
 

app/src/main/java/com/simplemobiletools/calendar/DBHelper.java

@@ -8,6 +8,8 @@ import android.database.sqlite.SQLiteOpenHelper;
 
 import com.simplemobiletools.calendar.models.Event;
 
+import org.joda.time.DateTime;
+
 import java.util.ArrayList;
 import java.util.List;
 
@@ -92,31 +94,6 @@ public class DBHelper extends SQLiteOpenHelper {
             mCallback.eventsDeleted(ids.length);
     }
 
-    public void getEvents(int fromTS, int toTS) {
-        final String[] projection = {COL_ID, COL_START_TS, COL_END_TS, COL_TITLE, COL_DESCRIPTION, COL_REMINDER_MINUTES};
-        List<Event> events = new ArrayList<>();
-        final String selection = COL_START_TS + " <= ? AND " + COL_END_TS + " >= ?";
-        final String[] selectionArgs = {String.valueOf(toTS), String.valueOf(fromTS)};
-        final Cursor cursor = mDb.query(TABLE_NAME, projection, selection, selectionArgs, null, null, COL_START_TS);
-        if (cursor != null) {
-            if (cursor.moveToFirst()) {
-                do {
-                    final int id = cursor.getInt(cursor.getColumnIndex(COL_ID));
-                    final int startTS = cursor.getInt(cursor.getColumnIndex(COL_START_TS));
-                    final int endTS = cursor.getInt(cursor.getColumnIndex(COL_END_TS));
-                    final String title = cursor.getString(cursor.getColumnIndex(COL_TITLE));
-                    final String description = cursor.getString(cursor.getColumnIndex(COL_DESCRIPTION));
-                    final int reminderMinutes = cursor.getInt(cursor.getColumnIndex(COL_REMINDER_MINUTES));
-                    events.add(new Event(id, startTS, endTS, title, description, reminderMinutes));
-                } while (cursor.moveToNext());
-            }
-            cursor.close();
-        }
-
-        if (mCallback != null)
-            mCallback.gotEvents(events);
-    }
-
     public Event getEvent(int id) {
         final String[] projection = {COL_START_TS, COL_END_TS, COL_TITLE, COL_DESCRIPTION, COL_REMINDER_MINUTES};
         final String selection = COL_ID + " = ?";
@@ -136,6 +113,53 @@ public class DBHelper extends SQLiteOpenHelper {
         return null;
     }
 
+    public void getEvents(int fromTS, int toTS) {
+        List<Event> events = new ArrayList<>();
+        final String[] projection = getAllColumns();
+        final String selection = COL_START_TS + " <= ? AND " + COL_END_TS + " >= ?";
+        final String[] selectionArgs = {String.valueOf(toTS), String.valueOf(fromTS)};
+        final Cursor cursor = mDb.query(TABLE_NAME, projection, selection, selectionArgs, null, null, COL_START_TS);
+        if (cursor != null) {
+            events = fillEvents(cursor);
+        }
+
+        if (mCallback != null)
+            mCallback.gotEvents(events);
+    }
+
+    public List<Event> getEventsAtReboot() {
+        List<Event> events = new ArrayList<>();
+        final String[] projection = getAllColumns();
+        final String selection = COL_START_TS + " > ? AND " + COL_REMINDER_MINUTES + " != ?";
+        final String[] selectionArgs = {String.valueOf(DateTime.now().getMillis() / 1000), "-1"};
+        final Cursor cursor = mDb.query(TABLE_NAME, projection, selection, selectionArgs, null, null, null);
+        if (cursor != null) {
+            events = fillEvents(cursor);
+        }
+        return events;
+    }
+
+    private String[] getAllColumns() {
+        return new String[]{COL_ID, COL_START_TS, COL_END_TS, COL_TITLE, COL_DESCRIPTION, COL_REMINDER_MINUTES};
+    }
+
+    private List<Event> fillEvents(Cursor cursor) {
+        final List<Event> events = new ArrayList<>();
+        if (cursor.moveToFirst()) {
+            do {
+                final int id = cursor.getInt(cursor.getColumnIndex(COL_ID));
+                final int startTS = cursor.getInt(cursor.getColumnIndex(COL_START_TS));
+                final int endTS = cursor.getInt(cursor.getColumnIndex(COL_END_TS));
+                final String title = cursor.getString(cursor.getColumnIndex(COL_TITLE));
+                final String description = cursor.getString(cursor.getColumnIndex(COL_DESCRIPTION));
+                final int reminderMinutes = cursor.getInt(cursor.getColumnIndex(COL_REMINDER_MINUTES));
+                events.add(new Event(id, startTS, endTS, title, description, reminderMinutes));
+            } while (cursor.moveToNext());
+        }
+        cursor.close();
+        return events;
+    }
+
     public interface DBOperationsListener {
         void eventInserted(Event event);
 

app/src/main/java/com/simplemobiletools/calendar/Utils.java

@@ -1,9 +1,16 @@
 package com.simplemobiletools.calendar;
 
+import android.app.AlarmManager;
+import android.app.PendingIntent;
 import android.content.Context;
+import android.content.Intent;
 import android.graphics.Color;
+import android.os.SystemClock;
 import android.widget.Toast;
 
+import com.simplemobiletools.calendar.models.Event;
+import com.simplemobiletools.calendar.receivers.NotificationReceiver;
+
 public class Utils {
 
     public static int adjustAlpha(int color, float factor) {
@@ -17,4 +24,22 @@ public class Utils {
     public static void showToast(Context context, int resId) {
         Toast.makeText(context, context.getResources().getString(resId), Toast.LENGTH_SHORT).show();
     }
+
+    public static void scheduleNotification(Context context, Event event) {
+        if (event.getReminderMinutes() == -1) {
+            return;
+        }
+
+        final long delayFromNow = (long) event.getStartTS() * 1000 - event.getReminderMinutes() * 60000 - System.currentTimeMillis();
+        if (delayFromNow < 0) {
+            return;
+        }
+
+        final long notifInMs = SystemClock.elapsedRealtime() + delayFromNow;
+        final Intent intent = new Intent(context, NotificationReceiver.class);
+        intent.putExtra(NotificationReceiver.EVENT_ID, event.getId());
+        final PendingIntent pendingIntent = PendingIntent.getBroadcast(context, event.getId(), intent, PendingIntent.FLAG_UPDATE_CURRENT);
+        final AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+        alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, notifInMs, pendingIntent);
+    }
 }

app/src/main/java/com/simplemobiletools/calendar/activities/EventActivity.java

@@ -1,13 +1,10 @@
 package com.simplemobiletools.calendar.activities;
 
-import android.app.AlarmManager;
 import android.app.DatePickerDialog;
-import android.app.PendingIntent;
 import android.app.TimePickerDialog;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
-import android.os.SystemClock;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.AppCompatSpinner;
 import android.view.Menu;
@@ -23,7 +20,6 @@ import android.widget.TimePicker;
 import com.simplemobiletools.calendar.Constants;
 import com.simplemobiletools.calendar.DBHelper;
 import com.simplemobiletools.calendar.Formatter;
-import com.simplemobiletools.calendar.NotificationPublisher;
 import com.simplemobiletools.calendar.R;
 import com.simplemobiletools.calendar.Utils;
 import com.simplemobiletools.calendar.models.Event;
@@ -310,34 +306,16 @@ public class EventActivity extends AppCompatActivity implements DBHelper.DBOpera
         }
     }
 
-    private void handleNotification(Event event) {
-        if (event.getReminderMinutes() == -1) {
-            return;
-        }
-
-        final long delayFromNow = (long) event.getStartTS() * 1000 - event.getReminderMinutes() * 60000 - System.currentTimeMillis();
-        if (delayFromNow < 0) {
-            return;
-        }
-
-        final long notifInMs = SystemClock.elapsedRealtime() + delayFromNow;
-        final Intent intent = new Intent(this, NotificationPublisher.class);
-        intent.putExtra(NotificationPublisher.EVENT_ID, event.getId());
-        final PendingIntent pendingIntent = PendingIntent.getBroadcast(this, event.getId(), intent, PendingIntent.FLAG_UPDATE_CURRENT);
-        final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
-        alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, notifInMs, pendingIntent);
-    }
-
     @Override
     public void eventInserted(Event event) {
-        handleNotification(event);
+        Utils.scheduleNotification(getApplicationContext(), event);
         Utils.showToast(getApplicationContext(), R.string.event_added);
         finish();
     }
 
     @Override
     public void eventUpdated(Event event) {
-        handleNotification(event);
+        Utils.scheduleNotification(getApplicationContext(), event);
         Utils.showToast(getApplicationContext(), R.string.event_updated);
         finish();
     }

app/src/main/java/com/simplemobiletools/calendar/receivers/BootCompletedReceiver.java

@@ -0,0 +1,22 @@
+package com.simplemobiletools.calendar.receivers;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+import com.simplemobiletools.calendar.DBHelper;
+import com.simplemobiletools.calendar.Utils;
+import com.simplemobiletools.calendar.models.Event;
+
+import java.util.List;
+
+public class BootCompletedReceiver extends BroadcastReceiver {
+
+    @Override
+    public void onReceive(Context context, Intent arg1) {
+        final List<Event> events = DBHelper.newInstance(context, null).getEventsAtReboot();
+        for (Event event : events) {
+            Utils.scheduleNotification(context, event);
+        }
+    }
+}

app/src/main/java/com/simplemobiletools/calendar/receivers/NotificationReceiver.java

@@ -1,4 +1,4 @@
-package com.simplemobiletools.calendar;
+package com.simplemobiletools.calendar.receivers;
 
 import android.app.Notification;
 import android.app.NotificationManager;
@@ -9,10 +9,14 @@ import android.content.Intent;
 import android.media.RingtoneManager;
 import android.net.Uri;
 
+import com.simplemobiletools.calendar.Constants;
+import com.simplemobiletools.calendar.DBHelper;
+import com.simplemobiletools.calendar.Formatter;
+import com.simplemobiletools.calendar.R;
 import com.simplemobiletools.calendar.activities.EventActivity;
 import com.simplemobiletools.calendar.models.Event;
 
-public class NotificationPublisher extends BroadcastReceiver {
+public class NotificationReceiver extends BroadcastReceiver {
     public static String EVENT_ID = "event_id";
 
     public void onReceive(Context context, Intent intent) {