app-build.gradle

apply plugin: 'com.android.application'

android {
  compileSdkVersion 25
  buildToolsVersion '25.0.2'

  defaultConfig {
    applicationId "bamms.bamms"
    minSdkVersion 19
    targetSdkVersion 25
    versionCode 1
    versionName "1.0"
    multiDexEnabled true
    ndk {
      abiFilters 'armeabi-v7a', 'x86'
    }
    manifestPlaceholders = [
      'appAuthRedirectScheme': 'bamms',
      onesignal_app_id: '42ded2df-3fdc-49b7-8f46-07e9bd608733',
      onesignal_google_project_number: '923442899965'
    ]
  }
  buildTypes {
    release {
      minifyEnabled false
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
  }
  dexOptions {
    javaMaxHeapSize "8g"
  }
}

task exponentPrebuildStep(type: Exec) {
  workingDir '../../'

  if (System.getProperty('os.name').toLowerCase().contains('windows')) {
    commandLine 'cmd', '/c', '.\\.expo-source\\android\\detach-scripts\\prepare-detached-build.bat'
  } else {
    commandLine './.expo-source/android/detach-scripts/prepare-detached-build.sh'
  }
}
preBuild.dependsOn exponentPrebuildStep

repositories{
  flatDir{
    dirs 'libs'
  }
  mavenLocal()
  maven { url 'https://maven.fabric.io/public' }
}

dependencies {
  compile project(':react-native-onesignal')
  compile fileTree(dir: 'libs', include: ['*.jar'])
  testCompile 'junit:junit:4.12'
  compile 'com.android.support:appcompat-v7:25.3.1'
  compile 'com.android.support:multidex:1.0.1'

  
  compile('host.exp.exponent:expoview:20.0.0@aar') {
    exclude group: 'com.facebook.android', module: 'facebook-android-sdk'
    exclude group: 'com.facebook.android', module: 'audience-network-sdk'
    exclude group: 'io.nlopez.smartlocation', module: 'library'
    transitive = true;
  }

  compile ('com.facebook.android:facebook-android-sdk:4.7.0') {
    exclude module: 'bolts-android'
  }
  compile('com.facebook.android:audience-network-sdk:4.19.0') {
    exclude module: 'play-services-ads'
  }
  compile('io.nlopez.smartlocation:library:3.2.11') {
    transitive = false
  }
  
  
}

app.js

import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import OneSignal from "react-native-onesignal";

export default class App extends React.Component {
                 componentWillMount() {
                   OneSignal.setSubscription(true);
                   OneSignal.enableSound(true);
                   OneSignal.addEventListener("received", this.onReceived);
                   OneSignal.addEventListener("opened", this.onOpened);
                   OneSignal.addEventListener("registered", this.onRegistered);
                   OneSignal.addEventListener("ids", this.onIds);
                 }

                 componentWillUnmount() {
                   OneSignal.removeEventListener("received", this.onReceived);
                   OneSignal.removeEventListener("opened", this.onOpened);
                   OneSignal.removeEventListener("registered", this.onRegistered);
                   OneSignal.removeEventListener("ids", this.onIds);
                 }

                 

                 onReceived(notification) {
                   console.log("Notification received: ", notification);
                 }

                 onOpened(openResult) {
                   console.log("Message: ", openResult.notification.payload.body);
                   console.log("Data: ", openResult.notification.payload.additionalData);
                   console.log("isActive: ", openResult.notification.isAppInFocus);
                   console.log("openResult: ", openResult);
                 }

                 onRegistered(notifData) {
                   console.log("Device had been registered for push notifications!", notifData);
                 }

                 onIds(device) {
                   console.log("Device info: ", device);
                 }
                 render() {
                   return <View style={styles.container}>
                       <Text>
                         Open up App.js to start working on your
                         app!
                       </Text>
                       <Text>
                         Changes you make will automatically
                         reload.
                       </Text>
                       <Text>
                         Shake your phone to open the developer
                         menu.
                       </Text>
                     </View>;
                 }
               }

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
});

nodemodules-react-native-onesigna-android-build.gradle

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'
    }
}

apply plugin: 'com.android.library'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
        // Do not set onesignal_app_id here, it will be set in the app project.
        // Leave onesignal_google_project_number as it is now pulled from the dashboard.
        manifestPlaceholders = [onesignal_app_id: "",
                                onesignal_google_project_number: "REMOTE"]
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.facebook.react:react-native:+'
    compile 'com.onesignal:OneSignal:3.+@aar'
    compile 'com.google.android.gms:play-services-gcm:9.8.0'
    compile 'com.google.android.gms:play-services-analytics:9.8.0'
    compile 'com.google.android.gms:play-services-location:9.8.0'
    testCompile 'junit:junit:4.12'
}