escape url

app/src/main/java/de/joel/zoomhelper/MainActivity.java

@@ -282,10 +282,18 @@ public class MainActivity extends AppCompatActivity {
 
 
     private String buildZoomURL(String confno, String pwd, String name, String attendees) {
+        Uri.Builder builder = new Uri.Builder();
+        builder.scheme("zoomus")
+                .authority("zoom.us")
+                .appendPath("join")
+                .appendQueryParameter("confno",confno.replace(" ", ""))
+                .appendQueryParameter("pwd", pwd);
+
         if (!Objects.equals(attendees, "")) {
-            return "zoomus://zoom.us/join?confno=" + confno.replace(" ", "") + "&pwd=" + pwd + "&uname=" + name + " (" + attendees + ")";
+           builder.appendQueryParameter("uname", name + " (" + attendees + ")");
         } else
-            return "zoomus://zoom.us/join?confno=" + confno.replace(" ", "") + "&pwd=" + pwd + "&uname=" + name;
+            builder.appendQueryParameter("uname", name);
+        return builder.build().toString();
     }
 
     public String meetingsToString(ArrayList<Meeting> listMeetings) {
@@ -508,6 +516,7 @@ class Meeting implements Serializable {
             addAttendee(name, num);
         } else {
             this.attendees.get(found).num = num;
+            this.lastAtt = found;
         }
     }