6.02 Using Alarms

Author: Lyla

app/src/main/AndroidManifest.xml

@@ -42,6 +42,7 @@
             android:name=".data.WeatherProvider" />
 
         <service android:name=".service.SunshineService"/>
+        <receiver android:name=".service.SunshineService$AlarmReceiver" android:enabled="true"/>
     </application>
 
 </manifest>

app/src/main/java/com/example/android/sunshine/app/ForecastFragment.java

@@ -15,6 +15,9 @@
  */
 package com.example.android.sunshine.app;
 
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
@@ -181,10 +184,16 @@ void onLocationChanged( ) {
     }
 
     private void updateWeather() {
-        Intent intent = new Intent(getActivity(), SunshineService.class);
-        intent.putExtra(SunshineService.LOCATION_QUERY_EXTRA,
-                Utility.getPreferredLocation(getActivity()));
-        getActivity().startService(intent);
+        Intent alarmIntent = new Intent(getActivity(), SunshineService.AlarmReceiver.class);
+        alarmIntent.putExtra(SunshineService.LOCATION_QUERY_EXTRA, Utility.getPreferredLocation(getActivity()));
+
+        //Wrap in a pending intent which only fires once.
+        PendingIntent pi = PendingIntent.getBroadcast(getActivity(), 0,alarmIntent,PendingIntent.FLAG_ONE_SHOT);//getBroadcast(context, 0, i, 0);
+
+        AlarmManager am=(AlarmManager)getActivity().getSystemService(Context.ALARM_SERVICE);
+
+        //Set the AlarmManager to wake up the system.
+        am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, pi);
     }
 
     @Override

app/src/main/java/com/example/android/sunshine/app/service/SunshineService.java

@@ -17,8 +17,10 @@
 package com.example.android.sunshine.app.service;
 
 import android.app.IntentService;
+import android.content.BroadcastReceiver;
 import android.content.ContentUris;
 import android.content.ContentValues;
+import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
@@ -331,4 +333,15 @@ long addLocation(String locationSetting, String cityName, double lat, double lon
         return locationId;
     }
 
+    public static class AlarmReceiver extends BroadcastReceiver {
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            Intent sendIntent = new Intent(context, SunshineService.class);
+            sendIntent.putExtra(SunshineService.LOCATION_QUERY_EXTRA, intent.getStringExtra(SunshineService.LOCATION_QUERY_EXTRA));
+            context.startService(sendIntent);
+
+        }
+    }
+
 }