Minor updates and fixes

app/src/main/java/org/traccar/manager/MainFragment.java

@@ -109,7 +109,8 @@ public class MainFragment extends WebViewFragment {
         @Override
         public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
             Uri uri = Uri.parse(url);
-            if (uri.getHost().equals("cdnjs.cloudflare.com")) {
+            String host = uri.getHost();
+            if (host != null && host.equals("cdnjs.cloudflare.com")) {
                 String path = uri.getPath().substring("/ajax/libs".length());
                 try {
                     return loadFileFromAssets(url, "cdnjs" + path);

app/src/main/java/org/traccar/manager/StartFragment.java

@@ -64,7 +64,7 @@ public class StartFragment extends Fragment implements View.OnClickListener {
             protected Boolean doInBackground(String... urls) {
                 try {
 
-                    Uri uri = Uri.parse(urls[0]).buildUpon().appendPath("api/server").build();
+                    Uri uri = Uri.parse(urls[0]).buildUpon().appendEncodedPath("api/server").build();
                     URL url = new URL(uri.toString());
                     HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                     BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));