React Native - How Can I Emit An Event To Rn From Mainactivity.java?

In the React Native AppState library: iOS has three states background->inactive->active Android only has background->active When an Android app is fully backgrounded the M

Solution 1:

Try updating your MainActivity.java like this:

publicclassMainActivityextendsReactActivity {

    @Override
    publicvoidonStop() {
        super.onStop();

        WritableMap params = Arguments.createMap(); // add here the data you want to sendparams.putString("event", "ActivityonStop"); // <- example

        getReactInstanceManager().getCurrentReactContext()
                .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
                .emit("onStop", params);
    }
}

Let me know if this works. In my apps I usually send the events from a class that extends ReactContextBaseJavaModule where I can access the context just by calling getReactApplicationContext(), but it seems that it might work if you can obtain the ReactContext from the ReactInstanceManager.