Read JSON nested array response to avoid Duplicate entries in android

Try this

    try {
        JSONObject jsonObject= new JSONObject(readJSONFromAsset());

        JSONObject mainJsonObject = jsonObject.getJSONObject("data");

        String success = mainJsonObject.getString("success");

        JSONArray orders = mainJsonObject.getJSONArray("orders");

        for (int i = 0; i < orders.length(); i++) {

            JSONObject orderJsonObject = orders.getJSONObject(i);
            String orderId=orderJsonObject.getString("orderId");
            String prefix=orderJsonObject.getString("prefix");
            String status=orderJsonObject.getString("status");
            String createdOn=orderJsonObject.getString("createdOn");
            String createdBy=orderJsonObject.getString("createdBy");
            String tax=orderJsonObject.getString("tax");
            String shippingCharges=orderJsonObject.getString("shippingCharges");
            String deliveryCode=orderJsonObject.getString("deliveryCode");
            String shopId=orderJsonObject.getString("shopId");
            String amount=orderJsonObject.getString("amount");
            String subTotal=orderJsonObject.getString("subTotal");
            String discount=orderJsonObject.getString("discount");
            String couponCode=orderJsonObject.getString("couponCode");

            JSONArray productDetails=orderJsonObject.getJSONArray("productDetails");

            for (int j=0;j<productDetails.length();j++){
                JSONObject productDeatilObject=productDetails.getJSONObject(j);

                String productId=productDeatilObject.getString("productId");
                String storeId=productDeatilObject.getString("storeId");
                String productName=productDeatilObject.getString("productName");
                String quantity=productDeatilObject.getString("quantity");
                String productAmount=productDeatilObject.getString("productAmount");
                String totalAmount=productDeatilObject.getString("totalAmount");

                JSONObject optionDetails=productDeatilObject.getJSONObject("optionDetails");

                String optionId=optionDetails.getString("optionId");
                String optionName=optionDetails.getString("optionName");
                String optionAmount=optionDetails.getString("optionAmount");
            }

            JSONObject userAddressDetails=orderJsonObject.getJSONObject("userAddressDetails");
            String firstName=userAddressDetails.getString("firstName");
            String middleName=userAddressDetails.getString("middleName");
            String lastName=userAddressDetails.getString("lastName");
            String email=userAddressDetails.getString("email");
            String mobileNo=userAddressDetails.getString("mobileNo");
            String address=userAddressDetails.getString("address");
            String landMark=userAddressDetails.getString("landMark");
            String city=userAddressDetails.getString("city");
            String zipCode=userAddressDetails.getString("zipCode");
            String stateName=userAddressDetails.getString("stateName");
            String countryName=userAddressDetails.getString("countryName");
            String latitude=userAddressDetails.getString("latitude");
            String longitude=userAddressDetails.getString("longitude");
        }

    } catch (JSONException e) {
        e.printStackTrace();
    }

EDIT

You can use Gson to parse your JSON

Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of.

Create pojo class using http://www.jsonschema2pojo.org/

SAMPLE POJO CLASS of your response

Data class

public class Data {

    @SerializedName("success")
    @Expose
    private String success;
    @SerializedName("orders")
    @Expose
    private List<Order> orders = null;

    public String getSuccess() {
        return success;
    }

    public void setSuccess(String success) {
        this.success = success;
    }

    public List<Order> getOrders() {
        return orders;
    }

    public void setOrders(List<Order> orders) {
        this.orders = orders;
    }

}

Example class

public class Example {

    @SerializedName("data")
    @Expose
    private Data data;

    public Data getData() {
        return data;
    }

    public void setData(Data data) {
        this.data = data;
    }

}

OptionDetails class

public class OptionDetails {

    @SerializedName("optionId")
    @Expose
    private String optionId;
    @SerializedName("optionName")
    @Expose
    private String optionName;
    @SerializedName("optionAmount")
    @Expose
    private String optionAmount;

    public String getOptionId() {
        return optionId;
    }

    public void setOptionId(String optionId) {
        this.optionId = optionId;
    }

    public String getOptionName() {
        return optionName;
    }

    public void setOptionName(String optionName) {
        this.optionName = optionName;
    }

    public String getOptionAmount() {
        return optionAmount;
    }

    public void setOptionAmount(String optionAmount) {
        this.optionAmount = optionAmount;
    }

}

Order class

public class Order {

    @SerializedName("orderId")
    @Expose
    private String orderId;
    @SerializedName("prefix")
    @Expose
    private String prefix;
    @SerializedName("status")
    @Expose
    private String status;
    @SerializedName("createdOn")
    @Expose
    private String createdOn;
    @SerializedName("createdBy")
    @Expose
    private String createdBy;
    @SerializedName("tax")
    @Expose
    private String tax;
    @SerializedName("shippingCharges")
    @Expose
    private String shippingCharges;
    @SerializedName("deliveryCode")
    @Expose
    private String deliveryCode;
    @SerializedName("shopId")
    @Expose
    private String shopId;
    @SerializedName("amount")
    @Expose
    private String amount;
    @SerializedName("subTotal")
    @Expose
    private String subTotal;
    @SerializedName("discount")
    @Expose
    private String discount;
    @SerializedName("couponCode")
    @Expose
    private String couponCode;
    @SerializedName("productDetails")
    @Expose
    private List<ProductDetail> productDetails = null;
    @SerializedName("userAddressDetails")
    @Expose
    private UserAddressDetails userAddressDetails;

    public String getOrderId() {
        return orderId;
    }

    public void setOrderId(String orderId) {
        this.orderId = orderId;
    }

    public String getPrefix() {
        return prefix;
    }

    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public String getCreatedOn() {
        return createdOn;
    }

    public void setCreatedOn(String createdOn) {
        this.createdOn = createdOn;
    }

    public String getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(String createdBy) {
        this.createdBy = createdBy;
    }

    public String getTax() {
        return tax;
    }

    public void setTax(String tax) {
        this.tax = tax;
    }

    public String getShippingCharges() {
        return shippingCharges;
    }

    public void setShippingCharges(String shippingCharges) {
        this.shippingCharges = shippingCharges;
    }

    public String getDeliveryCode() {
        return deliveryCode;
    }

    public void setDeliveryCode(String deliveryCode) {
        this.deliveryCode = deliveryCode;
    }

    public String getShopId() {
        return shopId;
    }

    public void setShopId(String shopId) {
        this.shopId = shopId;
    }

    public String getAmount() {
        return amount;
    }

    public void setAmount(String amount) {
        this.amount = amount;
    }

    public String getSubTotal() {
        return subTotal;
    }

    public void setSubTotal(String subTotal) {
        this.subTotal = subTotal;
    }

    public String getDiscount() {
        return discount;
    }

    public void setDiscount(String discount) {
        this.discount = discount;
    }

    public String getCouponCode() {
        return couponCode;
    }

    public void setCouponCode(String couponCode) {
        this.couponCode = couponCode;
    }

    public List<ProductDetail> getProductDetails() {
        return productDetails;
    }

    public void setProductDetails(List<ProductDetail> productDetails) {
        this.productDetails = productDetails;
    }

    public UserAddressDetails getUserAddressDetails() {
        return userAddressDetails;
    }

    public void setUserAddressDetails(UserAddressDetails userAddressDetails) {
        this.userAddressDetails = userAddressDetails;
    }

}

ProductDetail class

public class ProductDetail {

    @SerializedName("productId")
    @Expose
    private String productId;
    @SerializedName("storeId")
    @Expose
    private String storeId;
    @SerializedName("productName")
    @Expose
    private String productName;
    @SerializedName("quantity")
    @Expose
    private String quantity;
    @SerializedName("productAmount")
    @Expose
    private String productAmount;
    @SerializedName("totalAmount")
    @Expose
    private Integer totalAmount;
    @SerializedName("optionDetails")
    @Expose
    private OptionDetails optionDetails;

    public String getProductId() {
        return productId;
    }

    public void setProductId(String productId) {
        this.productId = productId;
    }

    public String getStoreId() {
        return storeId;
    }

    public void setStoreId(String storeId) {
        this.storeId = storeId;
    }

    public String getProductName() {
        return productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    public String getQuantity() {
        return quantity;
    }

    public void setQuantity(String quantity) {
        this.quantity = quantity;
    }

    public String getProductAmount() {
        return productAmount;
    }

    public void setProductAmount(String productAmount) {
        this.productAmount = productAmount;
    }

    public Integer getTotalAmount() {
        return totalAmount;
    }

    public void setTotalAmount(Integer totalAmount) {
        this.totalAmount = totalAmount;
    }

    public OptionDetails getOptionDetails() {
        return optionDetails;
    }

    public void setOptionDetails(OptionDetails optionDetails) {
        this.optionDetails = optionDetails;
    }

}

UserAddressDetails class

public class UserAddressDetails {

    @SerializedName("firstName")
    @Expose
    private String firstName;
    @SerializedName("middleName")
    @Expose
    private String middleName;
    @SerializedName("lastName")
    @Expose
    private String lastName;
    @SerializedName("email")
    @Expose
    private String email;
    @SerializedName("mobileNo")
    @Expose
    private String mobileNo;
    @SerializedName("address")
    @Expose
    private String address;
    @SerializedName("landMark")
    @Expose
    private String landMark;
    @SerializedName("city")
    @Expose
    private String city;
    @SerializedName("zipCode")
    @Expose
    private String zipCode;
    @SerializedName("stateName")
    @Expose
    private String stateName;
    @SerializedName("countryName")
    @Expose
    private String countryName;
    @SerializedName("latitude")
    @Expose
    private String latitude;
    @SerializedName("longitude")
    @Expose
    private String longitude;

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getMiddleName() {
        return middleName;
    }

    public void setMiddleName(String middleName) {
        this.middleName = middleName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getMobileNo() {
        return mobileNo;
    }

    public void setMobileNo(String mobileNo) {
        this.mobileNo = mobileNo;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getLandMark() {
        return landMark;
    }

    public void setLandMark(String landMark) {
        this.landMark = landMark;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getZipCode() {
        return zipCode;
    }

    public void setZipCode(String zipCode) {
        this.zipCode = zipCode;
    }

    public String getStateName() {
        return stateName;
    }

    public void setStateName(String stateName) {
        this.stateName = stateName;
    }

    public String getCountryName() {
        return countryName;
    }

    public void setCountryName(String countryName) {
        this.countryName = countryName;
    }

    public String getLatitude() {
        return latitude;
    }

    public void setLatitude(String latitude) {
        this.latitude = latitude;
    }

    public String getLongitude() {
        return longitude;
    }

    public void setLongitude(String longitude) {
        this.longitude = longitude;
    }

}

than parse using Gson like below code

    String apiResponse = readJSONFromAsset();
    Gson gson = new GsonBuilder().create();

    Example resultObj = gson.fromJson(apiResponse, Example.class);

    ArrayList<Order> orders = new ArrayList<>();

    orders.addAll(resultObj.getData().getOrders());


    Log.e("_SIZE",  orders.size()+"_SIZE");

    for (int i = 0; i < orders.size(); i++) {

        Log.e("resultOb", orders.get(i).getAmount()+"amount");
        Log.e("resultOb", orders.get(i).getCouponCode()+"getCouponCode");
        Log.e("resultOb", orders.get(i).getDeliveryCode()+"getDeliveryCode");


        for (int j=0;j<orders.get(i).getProductDetails().size();j++){
            Log.e("resultOb", orders.get(i).getProductDetails().get(j).getTotalAmount() + "");
            Log.e("resultOb", orders.get(i).getProductDetails().get(j).getProductId() + "");
            Log.e("resultOb", orders.get(i).getProductDetails().get(j).getProductName() + "");
            Log.e("resultOb", orders.get(i).getProductDetails().get(j).getQuantity() + "");
        }

    }