Set of Example for Bridging android native Modules in React Native

NativeManager.java

package com.musicapp;

import android.annotation.TargetApi;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.os.Environment;
import android.support.v4.app.RemoteInput;
import android.support.v4.app.TaskStackBuilder;
import android.support.v7.app.NotificationCompat;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import android.support.v7.appcompat.R;

import com.facebook.react.bridge.ActivityEventListener;
import com.facebook.react.bridge.Callback;
import com.facebook.react.bridge.LifecycleEventListener;
import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReadableArray;
import com.facebook.react.bridge.ReactContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;
import com.facebook.react.bridge.WritableArray;
import com.facebook.react.bridge.Arguments;
import com.facebook.react.uimanager.annotations.ReactProp;

import java.io.File;


public class MusicManager extends ReactContextBaseJavaModule implements LifecycleEventListener {
    private ResponseReceiver receiver;
    private int notificationId;
    private static final String KEY_TEXT_REPLY = "key_text_reply";


    public MusicManager(ReactApplicationContext reactContext) {
        super(reactContext);
        this.notificationId = 1;
    }


    @Override
    public String getName() {
        return "MusicAndroid";
    }


    @Override
    public void initialize() {
        receiver = new ResponseReceiver();
        getReactApplicationContext().addLifecycleEventListener(this);
    }

    @ReactMethod
    public void startService() {
        Intent intent = new Intent(this.getCurrentActivity(), MusicService.class);
        intent.putExtra(MusicService.PARAM_IN_MSG, "Renga");

        intent
        this.getCurrentActivity().startService(intent);
    }

    @ReactMethod
    public void stopService() {
        Intent intent = new Intent(this.getCurrentActivity(), MusicService.class);
        this.getCurrentActivity().stopService(intent);
    }

    @ReactMethod
    public void listDirectory(int tag,Callback successCallBack, Callback failureCallBack){
        String path = Environment.getExternalStorageDirectory().toString()+"/Pictures";
        File directory = new File(path);
        File[] files = directory.listFiles();

        WritableArray array = Arguments.createArray();

        for (int i = 0; i < files.length; i++)
        {
            String fileName = "FileName:" + files[i].toURI();
            Log.d("Files",fileName);
            array.pushString(fileName);
        }


        array.pushInt(10);
        array.pushInt(10);
        array.pushInt(10);
        array.pushInt(10);

        if(tag == 10) {
            successCallBack.invoke(array);
        } else {
            failureCallBack.invoke("somehing");
        }


    }

    public int getId() {
        return this.notificationId++;
    }


    @TargetApi(Build.VERSION_CODES.KITKAT_WATCH)
    @ReactMethod
    public void sendNotification() {
        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this.getCurrentActivity());
        mBuilder.setSmallIcon(R.drawable.notification_template_icon_bg);
        mBuilder.setContentTitle("Notification Alert, Click Me!");
        mBuilder.setContentText("Hi, This is Android Notification Detail!").setNumber(getId());

        Intent notificationIntent = new Intent(this.getCurrentActivity(), MainActivity.class);
        PendingIntent contentIntent = PendingIntent.getActivity(this.getCurrentActivity(), 0, notificationIntent,
                PendingIntent.FLAG_UPDATE_CURRENT);
        mBuilder.setContentIntent(contentIntent);

        RemoteInput remoteInput = new RemoteInput.Builder(KEY_TEXT_REPLY)
                .setLabel("Reply")
                .build();

        NotificationCompat.Action action = new NotificationCompat.Action.Builder(R.drawable.notification_template_icon_bg,"Reply", contentIntent).addRemoteInput(remoteInput).build();


        NotificationCompat.InboxStyle inboxStyle =
                new NotificationCompat.InboxStyle();
        String[] events = new String[6];
        inboxStyle.setBigContentTitle("Event tracker details:");

        for (int i=0; i < events.length; i++) {

            inboxStyle.addLine(events[i]);
        }
        mBuilder.setStyle(inboxStyle);
        mBuilder.addAction(action);


        NotificationManager mNotificationManager = (NotificationManager) getReactApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationManager.notify(this.getId(), mBuilder.build());

    }


    @Override
    public void onHostResume() {
        IntentFilter filter = new IntentFilter(ResponseReceiver.ACTION_RESP);
        filter.addCategory(Intent.CATEGORY_DEFAULT);
        this.getReactApplicationContext().registerReceiver(receiver, filter);
    }

    @Override
    public void onHostPause() {
        this.getReactApplicationContext().unregisterReceiver(receiver);
    }

    @Override
    public void onHostDestroy() {

    }

    public class ResponseReceiver extends BroadcastReceiver {
        public static final String ACTION_RESP = "com.musicapp.intent.action.MESSAGE_PROCESSED";
        @Override
        public void onReceive(Context context, Intent intent) {
            System.out.println("ON broad Cast Received");
            String resultTxt = intent.getStringExtra(MusicService.PARAM_OUT_MSG);
            Toast.makeText(getReactApplicationContext(), resultTxt, Toast.LENGTH_SHORT).show();
        }
    }

}