react-native-nearby-api

This is a React Native wrapper for the Google Nearby Messages API. It is a fork of this repository by badfeatures.

Noteable changes to the original respository

• Rewritten in Typescript
• Autolinking support for React Native 0.60 and above.
• Android X support
• Upgraded to [email protected] on Android
• Upgraded to Gradle 3.5.2

Getting started

$ yarn add @adrianso/react-native-nearby-api

Installation

iOS

• cd ios/
  pod install

• Build and run project

Android

There are no additional steps required for Android

Usage

See the example app for more detail and code examples.

• Retrieve your API Keys from the Google Console iOS | Android

• Add the correct permissions to the AndroidManifest.

  <!-- Include if wish to use BLE -->
  <uses-permission android:name="android.permission.BLUETOOTH"/>
  <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
  <!-- Include if wish to use audio -->
  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
  <uses-permission android:name="android.permission.RECORD_AUDIO" />

• Add the Android API Key in the AndroidManifest .

  <meta-data
    android:name="com.google.android.nearby.messages.API_KEY"
    android:value="MY_API_KEY" />

• The iOS API key will be supplied through the connect() method.

• Add NSBluetoothPeripheralUsageDescription to the Info.plist

• Add NSMicrophoneUsageDescription to the iOS project's Info.plist if using audio

import NearbyApi from 'react-native-nearby-api';

const nearbyAPI = new NearbyAPI(true); // Use BLE only, no audio.

nearbyAPI.onConnected((message) => {
  console.log(message);
});

nearbyAPI.onDisconnected((message) => {
  console.log(message);
});

nearbyAPI.onFound((message) => {
  console.log('Message Found!');
  console.log(message);
});

nearbyAPI.onLost((message) => {
  console.log('Message Lost!');
  console.log(message);
});

// Android Only
nearbyAPI.onDistanceChanged((message, value) => {
  console.log('Distance Changed!');
  console.log(message, value);
});

// Android Only
nearbyAPI.onBLESignalChanged((message, value) => {
  console.log('BLE Signal Changed!');
  console.log(message, value);
});

nearbyAPI.onPublishSuccess((message) => {
  console.log(message);
});

nearbyAPI.onPublishFailed((message) => {
  console.log(message);
});

nearbyAPI.onSubscribeSuccess(() => {});

nearbyAPI.onSubscribeFailed(() => {});

// To connect from Google API Client
nearbyAPI.connect(API_KEY);

// To check if the nearby API is connected.
nearbyAPI.isConnected((connected, error) => {
  console.log(connected);
});

// To disconnect later
nearbyAPI.disconnect();

// To publish to nearby devices
nearbyAPI.publish('Hello World!');

// To check if the nearby API is publishing.
nearbyAPI.isPublishing((publishing, error) => {
  console.log(publishing);
});

// To subscribe to nearby devices broadcasting
nearbyAPI.subscribe();

// To check if the nearby API is subscribing.
nearbyAPI.isSubscribing((subscribing, error) => {
  console.log(subscribing);
});

// To unpublish
nearbyAPI.unpublish();

// To unsubscribe
nearbyAPI.unsubscribe();

Running the Example

• Install the dependencies in the root folder

  yarn

Generate an API Key from the Google Developer Console

1. Go to the Google Developers Console.
2. Create or select a project to register your application with.
3. Click Continue to Enable the API.
4. On the Credentials page, create a new API Key. (No key restrictions are needed for this example)
5. Copy/Paste your key in example/index.js and in the example AndroidManifest.xml

Android

• To run the example app, the packager must have the projectRoots reordered for the example/ directory. In another terminal window:

yarn start --projectRoots <FULL-PATH-TO-REPO>/react-native-nearby-api/example,<FULL-PATH-TO-REPO>/react-native-nearby-api

yarn run:android

adb reverse tcp:8081 tcp:8081

iOS

• cd example ios/
• bundle exec pod install
• Open example.xcworkspace
• Add your IP to AppDelegate.m

  jsCodeLocation = [NSURL URLWithString:@"http://<IP-ADDRESS>:8081/index.bundle?platform=ios&dev=true"];

• In another terminal window: yarn start
• Run on device

Common issues

iOS compilation error: duplicate symbols for architecture

Cause

This is caused by a conflict of the AddLogSink and RemoveLogSink functions in the glog and NearbyMessages library.

Workaround

Add the following to your Podfile.

post_install do |installer|
  puts "Renaming logging functions"

  root = File.dirname(installer.pods_project.path)
  Dir.chdir(root);
  Dir.glob("**/*.{h,cc,cpp,in}") {|filename|
    filepath = root + "/" + filename
    text = File.read(filepath)
    addText = text.gsub!(/(?<!React)AddLogSink/, "ReactAddLogSink")
    if addText
      File.chmod(0644, filepath)
      f = File.open(filepath, "w")
      f.write(addText)
      f.close
    end

    text2 = addText ? addText : text
    removeText = text2.gsub!(/(?<!React)RemoveLogSink/, "ReactRemoveLogSink")
    if removeText
      File.chmod(0644, filepath)
      f = File.open(filepath, "w")
      f.write(removeText)
      f.close
    end
  }
end

iOS compilation error: Multiple commands produce Assets.car.

Details

This is casued by an issue in the NearbyMessage podspec. This only affects bulids using the "New Build System" in Xcode.

Work around

Add the following to your Podfile

  post_install do |installer|
    project_path = 'example.xcodeproj'
    project = Xcodeproj::Project.open(project_path)
    project.targets.each do |target|
        build_phase = target.build_phases.find { |bp| bp.display_name == '[CP] Copy Pods Resources' }
        assets_path = '${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/Assets.car'
        if build_phase.present? && build_phase.output_paths.include?(assets_path) == true
            build_phase.output_paths.delete(assets_path)
        end
    end
    project.save(project_path)
  end