From 2c3667aad296f22e36a7a1c4a31560d100f96641 Mon Sep 17 00:00:00 2001
From: Suhail Alkowaileet <xsoh.k7@gmail.com>
Date: Tue, 23 Oct 2018 09:08:11 +0300
Subject: [PATCH] - Get notified when a new event has come.

---
 AndroidManifest.xml                           |  3 ++
 .../android/calendar/AllInOneActivity.java    |  3 ++
 .../alerts/ProviderChangedReceiverAsJob.java  | 54 +++++++++++++++++++
 3 files changed, 60 insertions(+)
 create mode 100644 src/com/android/calendar/alerts/ProviderChangedReceiverAsJob.java

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index b120a8ac3..a301c2e29 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -253,6 +253,9 @@
 
         <service android:name="com.android.calendar.alerts.InitAlarmsService" />
 
+        <service android:name="com.android.calendar.alerts.ProviderChangedReceiverAsJob"
+            android:permission="android.permission.BIND_JOB_SERVICE" />
+
         <!-- Declarations for the widget -->
         <receiver android:name="com.android.calendar.widget.CalendarAppWidgetProvider" android:label="@string/gadget_title">
             <intent-filter>
diff --git a/src/com/android/calendar/AllInOneActivity.java b/src/com/android/calendar/AllInOneActivity.java
index 775fd5b44..1ab426a7d 100644
--- a/src/com/android/calendar/AllInOneActivity.java
+++ b/src/com/android/calendar/AllInOneActivity.java
@@ -80,6 +80,7 @@
 import com.android.calendar.CalendarController.EventType;
 import com.android.calendar.CalendarController.ViewType;
 import com.android.calendar.agenda.AgendaFragment;
+import com.android.calendar.alerts.ProviderChangedReceiverAsJob;
 import com.android.calendar.month.MonthByWeekFragment;
 import com.android.calendar.selectcalendars.SelectVisibleCalendarsFragment;
 import com.android.datetimepicker.date.DatePickerDialog;
@@ -273,6 +274,8 @@ protected void onCreate(Bundle icicle) {
             }, null, null /* selection args */, null /* sort order */);
         }
 
+        ProviderChangedReceiverAsJob.schedule(this);
+
         // This needs to be created before setContentView
         mController = CalendarController.getInstance(this);
 
diff --git a/src/com/android/calendar/alerts/ProviderChangedReceiverAsJob.java b/src/com/android/calendar/alerts/ProviderChangedReceiverAsJob.java
new file mode 100644
index 000000000..dd438af5b
--- /dev/null
+++ b/src/com/android/calendar/alerts/ProviderChangedReceiverAsJob.java
@@ -0,0 +1,54 @@
+package com.android.calendar.alerts;
+
+import android.annotation.TargetApi;
+import android.app.job.JobInfo;
+import android.app.job.JobParameters;
+import android.app.job.JobScheduler;
+import android.app.job.JobService;
+import android.appwidget.AppWidgetManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Handler;
+import android.provider.CalendarContract;
+import android.widget.Toast;
+
+import com.android.calendar.widget.CalendarAppWidgetProvider;
+import com.android.calendar.widget.CalendarAppWidgetService;
+
+@TargetApi(Build.VERSION_CODES.N)
+public class ProviderChangedReceiverAsJob extends JobService {
+    private static final int mJobId = 1005; //Job Id
+    final Handler mHandler = new Handler(); //Just to display Toasts
+
+    public static void schedule(Context oContext) {
+        ComponentName oComponentName = new ComponentName(oContext, ProviderChangedReceiverAsJob.class);
+        JobInfo.Builder oJobInfoBuilder = new JobInfo.Builder(mJobId, oComponentName);
+        final Uri CALENDAR_URI = Uri.parse("content://" + CalendarContract.AUTHORITY + "/");
+        oJobInfoBuilder.addTriggerContentUri(new JobInfo.TriggerContentUri(CalendarContract.CONTENT_URI, JobInfo.TriggerContentUri.FLAG_NOTIFY_FOR_DESCENDANTS));
+        oJobInfoBuilder.addTriggerContentUri(new JobInfo.TriggerContentUri(CALENDAR_URI, 0));
+        JobScheduler jobScheduler = (JobScheduler) oContext.getSystemService(Context.JOB_SCHEDULER_SERVICE);
+        jobScheduler.schedule(oJobInfoBuilder.build());
+    }
+
+
+    @Override
+    public boolean onStartJob(JobParameters params) {
+        //Toast.makeText(getApplicationContext(), "Update The widget!", Toast.LENGTH_SHORT).show();
+
+        //TODO: Here should be the update of the widgets.
+
+
+        schedule(this); //Reschedule to receive future changes
+        return (false);
+    }
+
+
+    @Override
+    synchronized public boolean onStopJob(JobParameters params) {
+        return (false);
+    }
+
+}
\ No newline at end of file