private void writeNewMarker(int sessionType,String myUuid,String datetime,Location location) {
    locationToDB = new LocationFromAndroid();
    JSONObject jsonObjectCoords = new Coords(location.getLatitude() + "",location.getLongitude() + "",location.getAltitude() + "");
    locationToDB.setFinish("false");
    locationToDB.setLost("false");
    locationToDB.setCoords(jsonObjectCoords);
    locationToDB.setDistanceToGo("0");
    locationToDB.setHeading(location.getBearing() + "");
    locationToDB.setNauwkeurigheid(location.getAccuracy() + "");
    locationToDB.setSpeed(location.getSpeed() * 3.6 + "");
    locationToDB.setSpeed2(location.getSpeed() + "");
    locationToDB.setTimestamp(location.getTime() + "");
    locationToDB.setWp_user(myUuid);
    locationToDB.setSessionType(sessionType);
    locationToDB.setTitle(title);
    if(myUuid != null && datetime != null && locationToDB.getTitle() != null && !myUuid.isEmpty() && !datetime.isEmpty()) {
        databaseRef.child(myUuid + "-Android" + sessionType + datetime).setValue(locationToDB);

当我在调试模式下构建应用程序时,它完全正常.但是,当我在Google Play的发布模式下构建它时,它会停止在此行上工作：

databaseRef.child(myUuid + "-Android" + sessionType + datetime).setValue(locationToDB);

更具体一点：当我这样做时,一切都很好：

databaseRef.child(myUuid + "-Android" + sessionType + datetime).setValue("Test");

它看起来像传递一个对象,因为在签名的APK中无法获得值？

错误：
例外com.google.firebase.database.DatabaseException：没有在类上找到的序列化属性