Step-by-Step Guide to Integrate Native Android Application With React Native in 2026

The rapid rise of React Native has transformed how modern mobile applications are built. Businesses today demand faster development cycles, cost efficiency, and cross-platform compatibility, making React Native a preferred framework. However, there are scenarios where integrating native Android functionality becomes essential for performance or device-specific features.

In this guide, we will walk you through how to seamlessly integrate a native Android application with React Native, ensuring you get the best of both worlds—native performance and cross-platform scalability.

Table of Contents

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Simple Steps to Integrate React Native Module into Native Android Apps Easily

1. Environment setup

1. Install node
2. Install watchman
3. Install JDK Java8
4. Install Android Studio
5. Download and install SDK from android studio

2. Setup Directory Structure

1. Copy all existing android files to /android folder
2. Create package.json file – {

“name”: “MyReactNativeApp”,

“version”: “0.0.1”,

“private”: true,

“scripts”: {

“start”: “yarn react-native start”

}

}

3. Install React Native Dependencies 

Open terminal in current directory & Install react native with – yarn add react-native, install yarn if not installed

4. Add react native dependecies

Add react native dependecies to app level build.gradle – dependencies {

implementation “com.android.support:appcompat-v7:27.1.1”

implementation “com.facebook.react:react-native:+” // From node_modules

implementation “org.webkit:android-jsc:+”

}

5. Configure Project Repositories

Replace allprojects block in the top-level build.gradle with – allprojects {

repositories {

maven {

url “$rootDir/../node_modules/react-native/android”

}

maven {

url(“$rootDir/../node_modules/jsc-android/dist”)

}

}

}

6. Enable Native Modules Auto Linking

Setup auto linking by adding – apply from: file(“../node_modules/@react-native-community/cli-platform-android/native_modules.gradle”); applyNativeModulesSettingsGradle(settings) to settings.gradle file

7. Configure App Build Gradle

Add apply from: file(“../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle”); applyNativeModulesAppBuildGradle(project) in app/build.gradle

8. Update Android Manifest File

Define activity – <activity android:name=”com.facebook.react.devsupport.DevSettingsActivity” /> in AndroidManifest file

9. Improve Debugging

Apply the usesCleartextTraffic option to application tag in your AndroidManifest.xml

JS Code integration Steps

Step 1 – Create an index.js file in root of project folder – index.js is the starting point for React Native applications, and it is always required. It can be a small file that requires other files that are part of your React Native component or application, or it can contain all the code that is needed for it. In our case, we will put everything in index.js

Step 2 – Add to index.js file – import React from ‘react’;
import {

AppRegistry,

StyleSheet,

Text,

View

} from ‘react-native’;

class HelloWorld extends React.Component {

render() {

return (

<View style={styles.container}>

<Text style={styles.hello}>Hello, World</Text>

</View>

);

}

}

var styles = StyleSheet.create({

container: {

flex: 1,

justifyContent: ‘center’

},

hello: {

fontSize: 20,

textAlign: ‘center’,

margin: 10

}

});

AppRegistry.registerComponent(

‘MyReactNativeApp’,

() => HelloWorld

);

Step 3- In order to start the React Native runtime and tell it to render our JS componentCreate new Activity.java as normal and add also don’t forget to import all dependencies & define this activity in manifest file — public class MyReactActivity extends Activity implements DefaultHardwareBackBtnHandler {

private ReactRootView mReactRootView;

private ReactInstanceManager mReactInstanceManager;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

SoLoader.init(this, false);

mReactRootView = new ReactRootView(this);

List<ReactPackage> packages = new PackageList(getApplication()).getPackages();

// Packages that cannot be autolinked yet can be added manually here, for example:

// packages.add(new MyReactNativePackage());

// Remember to include them in `settings.gradle` and `app/build.gradle` too.

mReactInstanceManager = ReactInstanceManager.builder()

.setApplication(getApplication())

.setCurrentActivity(this)

.setBundleAssetName(“index.android.bundle”)

.setJSMainModulePath(“index”)

.addPackages(packages)

.setUseDeveloperSupport(BuildConfig.DEBUG)

.setInitialLifecycleState(LifecycleState.RESUMED)

.build();

// The string here (e.g. “MyReactNativeApp”) has to match

// the string in AppRegistry.registerComponent() in index.js

mReactRootView.startReactApplication(mReactInstanceManager, “MyReactNativeApp”, null);

setContentView(mReactRootView);

}

@Override

public void invokeDefaultOnBackPressed() {

super.onBackPressed();

}

}

Step 4 – Perform Sync with gradle

Step 5 – Add android:theme=”@style/Theme.AppCompat.Light.NoActionBar” to newly create activity class

Step 6 – Pass in some lifecycle methods – @Override

protected void onPause() {

super.onPause();

if (mReactInstanceManager != null) {

mReactInstanceManager.onHostPause(this);

}

}

@Override

protected void onResume() {

super.onResume();

if (mReactInstanceManager != null) {

mReactInstanceManager.onHostResume(this, this);

}

}

@Override

protected void onDestroy() {

super.onDestroy();

if (mReactInstanceManager != null) {

mReactInstanceManager.onHostDestroy(this);

}

if (mReactRootView != null) {

mReactRootView.unmountReactApplication();

}

}

@Override

public void onBackPressed() {

if (mReactInstanceManager != null) {

mReactInstanceManager.onBackPressed();

} else {

super.onBackPressed();

}

}

Step 7 – Finally, we need to hook up the dev menu with. – @Override

public boolean onKeyUp(int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_MENU && mReactInstanceManager != null) {

mReactInstanceManager.showDevOptionsDialog();

return true;

}

return super.onKeyUp(keyCode, event);

}

Step 8 – All steps have covered for integration

Step 9 – Run the package manager with – npm start

Step 10 – Run your android app with – react-native run-android

Why Choose React Native for Your Next App Development?

1. Faster Development with Reusable Components

React Native allows faster development as it enables developers to use the same components on the iOS and Android applications. Developers can take advantage of hot reloading, pre-built libraries and see results instantly in real time. This speeds up the entire process and allows companies to get their apps to market more quickly.

2. Near-Native Performance

Among the most important benefits of React Native is its near-native performance. Native components and APIs: React Native apps are built using native components, which means they have smooth animations, quicker load times, and overall better user experience. It’s a fit for performance-sensitive apps.

3. Strong Ecosystem and Community Support

React Native has a large ecosystem of tools, libraries and third party plugins to ease the development. Its well-established worldwide developer community keeps constantly improving, updating, and troubleshooting. This means developers will continuously have access to the most recent resources and best practices.

4. Cross-Platform Code Reusability

With React Native, a single codebase can be used to develop applications for both Android and iOS platforms. This not only reduces development effort but also minimizes maintenance costs. Businesses can achieve faster deployment across platforms without compromising on quality.

5. Seamless Integration with Native Code

React Native allows developers to integrate native modules written in Java, Kotlin, or Swift whenever required. This flexibility enables the addition of advanced functionalities such as device-specific features, high-performance modules, or third-party integrations that are not available in the core framework.

Conclusion

Integrating native Android apps with React Native offers a powerful way to build fast, scalable, and efficient mobile solutions. With React Native integration, businesses can combine native performance with cross-platform flexibility, reducing development time and cost while improving user experience. This makes it a strong choice for modern cross-platform mobile app development. 

Looking to build your next mobile app? Connect with Techugo today and unlock the power of React Native integration for faster, smarter, and scalable app development.

FAQ

1. Can I integrate React Native into an existing native Android app?

Yes, React Native can be integrated into an existing native Android app using a bridge setup and proper dependency configuration.

2. Do I need to rewrite my entire Android app to use React Native?

No, you can gradually add React Native modules without rewriting the full native Android codebase.

3. Is React Native good for high-performance Android applications?

Yes, React Native offers near-native performance and is suitable for most performance-sensitive apps when optimized properly.

4. What is the main benefit of integrating React Native with native Android?

It allows you to combine native performance with cross-platform development efficiency in a single app.

5. Can I use Kotlin or Java with React Native integration?

Yes, React Native fully supports integration with native Android code written in Kotlin or Java.

 

THE AUTHOR

Gunjan Manral