Hey there, since your iOS build works perfectly but Android's giving you trouble after switching from react-navigation to react-native-navigation, let's walk through the most common fixes and checks to get it sorted.

First, Double-Check MainApplication.java #

It looks like you only shared a snippet of this file—this is usually where the bulk of RNN's Android config lives. Make sure your full implementation matches this structure:

package com.client;

import com.reactnativenavigation.NavigationApplication;
import com.reactnativenavigation.react.NavigationReactNativeHost;
import com.reactnativenavigation.react.ReactGateway;
import java.util.Arrays;
import java.util.List;
import com.facebook.react.ReactPackage;

public class MainApplication extends NavigationApplication {
    @Override
    protected ReactGateway createReactGateway() {
        NavigationReactNativeHost host = new NavigationReactNativeHost(this, isDebug(), createAdditionalReactPackages()) {
            @Override
            protected String getJSMainModuleName() {
                return "index"; // Confirm this matches your entry file name (e.g., index.js)
            }
        };
        return new ReactGateway(this, isDebug(), host);
    }

    @Override
    public boolean isDebug() {
        return BuildConfig.DEBUG;
    }

    @Override
    public List<ReactPackage> createAdditionalReactPackages() {
        // Add any third-party React packages you're using here
        return Arrays.asList(
            // Example: new RNPushNotificationPackage()
        );
    }
}

Verify AndroidManifest.xml Settings #

Your manifest needs to point to the correct application class and activity config:

1. Ensure the application tag uses your MainApplication:

<application
    android:name=".MainApplication"
    android:label="@string/app_name"
    android:icon="@mipmap/ic_launcher"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:allowBackup="false"
    android:theme="@style/AppTheme">

2. Check your MainActivity's theme and intent filter:

<activity
    android:name=".MainActivity"
    android:label="@string/app_name"
    android:theme="@style/SplashTheme"
    android:launchMode="singleTask">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

Check Your Splash Theme #

If you haven't already, create a SplashTheme in res/values/styles.xml (this is required for RNN's SplashActivity):

<style name="SplashTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- Use a drawable or solid color for the splash background -->
    <item name="android:windowBackground">@color/white</item>
    <item name="android:statusBarColor">@color/white</item>
</style>

Gradle Configuration Checks #

1. In your project root's build.gradle, confirm you've set compatible versions (match these to your React Native version):

ext {
    buildToolsVersion = "33.0.0"
    minSdkVersion = 21
    compileSdkVersion = 33
    targetSdkVersion = 33
    rnnVersion = "7.37.0" // Use the latest compatible version with your RN setup
}

2. In app/build.gradle, ensure you have the RNN dependencies:

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "com.facebook.react:react-native:+" // Pulled from node_modules
    implementation "com.reactnativenavigation:navigation-react-native:${rootProject.ext.rnnVersion}"
    implementation "com.reactnativenavigation:navigation-android:${rootProject.ext.rnnVersion}"
}

Clear Caches (Always a Good First Step) #

• Clean Android build: Run cd android && ./gradlew clean
• Reset React Native cache: Run npx react-native start --reset-cache
• Uninstall the app from your device/emulator before rebuilding

Dig Into Error Logs #

If none of the above works, grab the exact error messages from:

• The terminal when running npx react-native run-android
• Android Studio's Logcat (filter for "Error" or "Exception" to find critical issues)
  Common culprits include missing packages, incompatible versions, or typos in class names.

内容的提问来源于stack exchange，提问作者Ata Mohammadi