Android Platform

import {PermissionsAndroid} from 'react-native';
import {launchCamera as launchCameraImagePicker} from 'react-native-image-picker';

const launchCamera: LaunchCamera = (options, callback) => {
    // Check camera permissions
    PermissionsAndroid.request(PermissionsAndroid.PERMISSIONS.CAMERA)
        .then((permission) => {
            if (permission !== PermissionsAndroid.RESULTS.GRANTED) {
                throw new Error('User did not grant permissions');
            }
            launchCameraImagePicker(options, callback);
        })
        .catch((error) => {
            callback({
                errorMessage: error.message,
                errorCode: 'permission',
            });
        });
};

class MainActivity : ReactActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(null)
        
        if (intent != null) {
            handleIntent(intent)
        }
    }
    
    override fun onNewIntent(intent: Intent) {
        super.onNewIntent(intent)
        setIntent(intent)
        handleIntent(intent)
    }
    
    private fun handleIntent(intent: Intent) {
        try {
            val intentHandler = IntentHandlerFactory.getIntentHandler(
                this, 
                intent.type, 
                intent.toString()
            )
            intentHandler?.handle(intent)
        } catch (exception: Exception) {
            Log.e("handleIntentException", exception.toString())
        }
    }
}

import com.urbanairship.AirshipExtender;
import com.urbanairship.channel.AirshipChannelListener;

public class CustomAirshipExtender extends AirshipExtender {
    @Override
    protected NotificationProvider onCreateNotificationProvider(
        @NonNull Context context,
        @NonNull AirshipConfigOptions configOptions
    ) {
        return new CustomNotificationProvider(context, configOptions);
    }
}

class GpsTripService : JobIntentService() {
    override fun onHandleWork(intent: Intent) {
        // Handle GPS trip updates in background
    }
}

override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
    if (event.keyCode == KeyEvent.KEYCODE_ESCAPE) {
        return false // Handled by Android
    }
    KeyCommandModule.getInstance().onKeyDownEvent(keyCode, event)
    return super.onKeyDown(keyCode, event)
}

project.ext.react = [
    enableHermes: true,
    hermesFlagsRelease: ["-O", "-output-source-map"],
]

import com.facebook.react.bridge.ReactApplicationContext
import com.facebook.react.bridge.ReactContextBaseJavaModule
import com.facebook.react.bridge.ReactMethod

class CustomModule(reactContext: ReactApplicationContext) : 
    ReactContextBaseJavaModule(reactContext) {
    
    override fun getName() = "CustomModule"
    
    @ReactMethod
    fun customMethod() {
        // Native implementation
    }
}

import com.facebook.react.ReactPackage
import com.facebook.react.bridge.NativeModule
import com.facebook.react.bridge.ReactApplicationContext

class CustomPackage : ReactPackage {
    override fun createNativeModules(
        reactContext: ReactApplicationContext
    ): List<NativeModule> {
        return listOf(CustomModule(reactContext))
    }
}