Prevent crash

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

@@ -116,11 +116,11 @@ public class ConnectionHelper {
         if (state.connected && !roaming) {
             ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
             if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
-                NetworkInfo ani = cm.getActiveNetworkInfo();
+                NetworkInfo ani = (cm == null ? null : cm.getActiveNetworkInfo());
                 if (ani != null)
                     state.roaming = ani.isRoaming();
             } else {
-                Network active = cm.getActiveNetwork();
+                Network active = (cm == null ? null : cm.getActiveNetwork());
                 if (active != null) {
                     NetworkCapabilities caps = cm.getNetworkCapabilities(active);
                     if (caps != null)
@@ -152,13 +152,13 @@ public class ConnectionHelper {
         ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
 
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
-            NetworkInfo ani = cm.getActiveNetworkInfo();
+            NetworkInfo ani = (cm == null ? null : cm.getActiveNetworkInfo());
             if (ani == null || !ani.isConnected())
                 return null;
             return cm.isActiveNetworkMetered();
         }
 
-        Network active = cm.getActiveNetwork();
+        Network active = (cm == null ? null : cm.getActiveNetwork());
         if (active == null) {
             Log.i("isMetered: no active network");
             return null;
@@ -199,7 +199,6 @@ public class ConnectionHelper {
 
         boolean underlying = false;
         Network[] networks = cm.getAllNetworks();
-        if (networks != null)
         for (Network network : networks) {
             caps = cm.getNetworkCapabilities(network);
             if (caps == null) {