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<uses-permission android:name="android.permission.INTERNET"/>

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package com.putuguna.ratinggoogleplaystore.reviews;

import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.os.Handler;

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/**
     * the method used to get all reviews in firebase firestore
     * @param idProduct
     */
    private void getAllReview(String idProduct) {
        progressBar.setVisibility(View.VISIBLE);
        rvReview.setVisibility(View.GONE);
        CollectionReference collectionReference = firebaseFirestore.collection("product");
        DocumentReference documentReference = collectionReference.document(idProduct);
        documentReference.collection("review")

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/**
     * This method used to display rating by colors
     *
     * @param productModel
     */
    private void setRatingByColor(ProductModel productModel) {
        int widthView = constrainLayout1.getWidth();
        int totalAllVoters = productModel.getTotalVoters();
        int totalRateStar1 = productModel.getStar1();
        int totalRateStar2 = productModel.getStar2();

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 /**
     * this method used to update rating of product
     *
     * @param reviewModel
     * @param productModel
     */
    private void updateRating(ReviewModel reviewModel, ProductModel productModel) {
        ProductModel rate = new ProductModel();
        rate.setIdProduct(productModel.getIdProduct());
        rate.setProductName(productModel.getProductName());

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/**
     * Insert data review to collection of product
     * @param review
     */
    private void insertDataReview(ReviewModel review) {
        ReviewModel reviewModel = new ReviewModel(review.getName(), review.getReview(), review.getTimeStamp(), review.getTotalStarGiven());
        CollectionReference collectionReference = firebaseFirestore.collection("product");
        DocumentReference documentReference = collectionReference.document(productModelGlobal.getIdProduct());
        documentReference.collection("review")
                .add(reviewModel)

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/margin_value_10dp"
    android:orientation="vertical">

    <LinearLayout

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package com.putuguna.ratinggoogleplaystore.reviews;

import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.putuguna.ratinggoogleplaystore.R;

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package com.putuguna.ratinggoogleplaystore.reviews;

import java.util.Date;

public class ReviewModel {
    private String name;
    private String review;
    private Date timeStamp;
    private double totalStarGiven;

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package com.putuguna.ratinggoogleplaystore.product;

import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.Toast;