How to Create Bridge in React Native for iOS and Android?

Not all functions are exposed to Javascript explicitly, to show a function to JavaScript a Java method must be annotated
using @ReactMethod. The return sort of bridge method is usually void.
We have also created a getStatus function which has params as callback and it returns a callback and passes the worth
of static variable isOn.
Next step is to register the module, if a module isn't registered it'll not be available from JavaScript. Create a file by
clicking on Menu File -> New -> Java Class and therefore the filename as BulbPackage then click OK. then add following
code to
package com.bridgeapp;
Import com.facebook.react.bridge.Callback;
Import com.facebook.react.bridge.ReactApplicationContext;
Import com.facebook.react.bridge.ReactContextBaseJavaModule;
Import com.facebook.react.bridge.ReactMethod;
class Bulb extends ReactContextBaseJavaModule {
Private static Boolean inOn = false;
Public Bulb (ReactApplicationContext reactContext) {
Super (reactContext);
}
@ReactMethod
Public void getStatus (
Callback successCallback){
successCallback.invoke ( null,isOn);
}
@ReactMethod
Public void turnOn (){
isOn = true ;
system.out.println(“Bulb is turn On ”);
}
@ ReactMethod
Public void turnOff (){