Exact alarm improvements

app/src/fdroid/AndroidManifest.xml

@@ -459,6 +459,10 @@
             <intent-filter>
                 <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
             </intent-filter>
+
+            <intent-filter>
+                <action android:name="android.app.action.SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED" />
+            </intent-filter>
         </receiver>
     </application>
 </manifest>

app/src/github/AndroidManifest.xml

@@ -459,6 +459,10 @@
             <intent-filter>
                 <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
             </intent-filter>
+
+            <intent-filter>
+                <action android:name="android.app.action.SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED" />
+            </intent-filter>
         </receiver>
     </application>
 </manifest>

app/src/main/AndroidManifest.xml

@@ -459,6 +459,10 @@
             <intent-filter>
                 <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
             </intent-filter>
+
+            <intent-filter>
+                <action android:name="android.app.action.SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED" />
+            </intent-filter>
         </receiver>
     </application>
 </manifest>

app/src/main/java/eu/faircode/email/AlarmManagerCompatEx.java

@@ -36,18 +36,25 @@ public class AlarmManagerCompatEx {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         boolean exact_alarms = prefs.getBoolean("exact_alarms", true);
 
+        // https://developer.android.com/about/versions/12/behavior-changes-12#exact-alarm-permission
         if (exact_alarms && canScheduleExactAlarms(context))
+            try {
                 AlarmManagerCompat.setExactAndAllowWhileIdle(am, type, trigger, pi);
+            } catch (SecurityException ex) {
+                Log.w(ex);
+                AlarmManagerCompat.setAndAllowWhileIdle(am, type, trigger, pi);
+            }
         else
             AlarmManagerCompat.setAndAllowWhileIdle(am, type, trigger, pi);
     }
 
     static boolean canScheduleExactAlarms(Context context) {
-        if (Build.VERSION.SDK_INT < 31 /* S */)
-            return true;
-        else
+        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.R)
             return true;
+        else {
             //AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
             //return am.canScheduleExactAlarms();
+            return true;
+        }
     }
 }

app/src/main/java/eu/faircode/email/ReceiverAutoStart.java

@@ -24,17 +24,27 @@ import android.content.Context;
 import android.content.Intent;
 
 public class ReceiverAutoStart extends BroadcastReceiver {
+    // https://developer.android.com/reference/android/app/AlarmManager#ACTION_SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED
+    private final String ACTION_EXACT =
+            "android.app.action.SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED";
+
     @Override
     public void onReceive(final Context context, Intent intent) {
-        if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction()) ||
-                Intent.ACTION_MY_PACKAGE_REPLACED.equals(intent.getAction())) {
+        String action = intent.getAction();
+        if (ACTION_EXACT.equals(action) ||
+                Intent.ACTION_BOOT_COMPLETED.equals(action) ||
+                Intent.ACTION_MY_PACKAGE_REPLACED.equals(action)) {
             Log.i("Received " + intent);
 
-            if (Intent.ACTION_MY_PACKAGE_REPLACED.equals(intent.getAction()))
+            if (Intent.ACTION_MY_PACKAGE_REPLACED.equals(action))
                 ApplicationEx.upgrade(context);
 
+            if (ACTION_EXACT.equals(action))
+                ServiceSynchronize.reload(context, null, false, action);
+            else {
                 ServiceSynchronize.boot(context);
                 ServiceSend.boot(context);
             }
         }
+    }
 }

app/src/play/AndroidManifest.xml

@@ -460,6 +460,10 @@
             <intent-filter>
                 <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
             </intent-filter>
+
+            <intent-filter>
+                <action android:name="android.app.action.SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED" />
+            </intent-filter>
         </receiver>
     </application>
 </manifest>