How to get data from Firebase Remote Config in android application?

What is Firebase Remote Config?
– Firebase Remote Config is a cloud service.
– That lets you change the behavior and appearance of your app without requiring users.
– You create in-app default values that control the behavior and appearance of your app.
– You can later use the firebase console or the Remote Config to override in-app default values for all app users or for segments of your user base.

How does it work?
– You define in-app default settings that govern the functionality and presentation of your app. You may subsequently utilise the Firebase interface or Remote Config to alter in-app default values for all app users or subsets of your user base.

Follow the below step for setup FIREBASE REMOTE CONFIG :
1> Open firebase console and create the project in firebase.
2> Firebase > Remote Config click then add getting your app key and value.

3> Download the google-service.json file.
4> This file add to your project.
5> Then go to your app code and add initialization firebase.
6> Add the below dependency for firebase remote config.

// add classpath and plugin
dependencies {
    classpath 'com.android.tools.build:gradle:4.1.3'
    classpath 'com.google.gms:google-services:4.3.10'
  }

apply plugin: 'com.google.gms.google-services'

// dependency
implementation 'com.google.firebase:firebase-analytics:18.0.3'
implementation 'com.google.firebase:firebase-config:20.0.4'

7> Then use the below code in your app.

public class MainActivity extends AppCompatActivity {

    private static final String PRICE_DATA = "price";

    private FirebaseRemoteConfig mFirebaseRemoteConfig;
    private TextView mPriceTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mPriceTextView = findViewById(R.id.txt);

        mFirebaseRemoteConfig = FirebaseRemoteConfig.getInstance();

        FirebaseRemoteConfigSettings configSettings = new FirebaseRemoteConfigSettings.Builder().setMinimumFetchIntervalInSeconds(3600).build();
        mFirebaseRemoteConfig.setConfigSettingsAsync(configSettings);
        mFirebaseRemoteConfig.setDefaultsAsync(R.xml.remote_config_defaults);

        findViewById(R.id.btn).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                fetchDiscount();
            }
        });
    }

    private void fetchDiscount() {
        mPriceTextView.setText(R.string.loading);

        long cacheExpiration = 3600;

        mFirebaseRemoteConfig.fetch(cacheExpiration).addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
                if (task.isSuccessful()) {
                    Log.d("FETCH", getString(R.string.succeeded));
                    mFirebaseRemoteConfig.activate();
                } else {
                    Log.d("FETCH", getString(R.string.failed));
                }
                displayPrice();
            }
        });
    }

    private void displayPrice() {
        String finalPrice2 = mFirebaseRemoteConfig.getString(PRICE_DATA);
        mPriceTextView.setText("Your Price is : " + finalPrice2);
    }
}

Main Layout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context="com.example.config.MainActivity">

  <TextView
    android:id="@+id/txt"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_above="@+id/btn"
    android:gravity="center"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:text="Checking your price…"
    android:textAppearance="@style/TextAppearance.AppCompat.Large" />

  <Button
    android:id="@+id/btn"
    android:layout_marginTop="20dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:background="#000000"
    android:text="@string/fetch"
    android:textAllCaps="false"
    android:textColor="#FFFFFF" />

</RelativeLayout>

8> Below the output screenshot check this.