README.md

# react-native-gcm-push-notification

Firebase notification for React Native Android and IOS

## Demo

https://github.com/oney/TestGcm

## Installation

- Run `npm install react-native-fcm --save`
- Run rnpm link

## Android Configuration

- In `android/build.gradle`
```gradle
dependencies {
    classpath 'com.android.tools.build:gradle:2.0.0'
    classpath 'com.google.gms:google-services:3.0.0' // <- Add this line
```

- In `android/app/build.gradle`
```gradle
apply plugin: "com.android.application"
apply plugin: 'com.google.gms.google-services' // <- Add this line
...
```

- In `android/app/src/main/AndroidManifest.xml`, add these lines, be sure to change `com.xxx.yyy` to your package

```
<application
  android:theme="@style/AppTheme">

  ...
  <service android:name="com.evollu.react.fcm.MessagingService">
    <intent-filter>
      <action android:name="com.google.firebase.MESSAGING_EVENT"/>
    </intent-filter>
  </service>

  <service android:name="com.evollu.react.fcm.InstanceIdService" android:exported="false">
    <intent-filter>
      <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
    </intent-filter>
  </service>
  ...
```

### IOS Configuration

install pod 'Firebase/Messaging'

in AppDelegate.m add
```
#import "FCMModule.h"
```

```

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)notification {
  [[NSNotificationCenter defaultCenter] postNotificationName: FCMNotificationReceived
                                                      object:self
                                                    userInfo:notification];

}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)notification fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))handler {
  [[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived
                                                      object:self
                                                    userInfo:notification];
  handler(UIBackgroundFetchResultNoData);
}
```


### FCM config file
In [firebase console](https://console.firebase.google.com/), you can get `google-services.json` file and place it in `android/app` directory and get `googleServices-info.plist` file and place it in `/ios` directory

### Usage

```javascript

var FCM = require('react-native-fcm');

componentWillMount() {
  FCM.requestPermissions();
  FCM.getFCMToken().then(token => {
     //store fcm token in your server
  });
  this.fcmNotifLsnr = DeviceEventEmitter.addListener('FCMNotificationReceived', (notif) => {
    //there are two parts of notif. notif.notification contains the notification payload, notif.data contains data payload
  });
  this.fcmTokenLsnr = DeviceEventEmitter.addListener('FCMTokenRefreshed', (token) => {
      //fcm token may not be available on first load, catch it here
  });
}

componentWillUnmount() {
  //prevent leak
  this.fcmNotifLsnr.remove();
  this.fcmTokenLsnr.remove();
}

}
```

## Q & A
### Why my android build is co
### Why I don't get data notification when app is killed?
If you send notification with payload only, you can only get the data message when app is in foreground or background. Killed app can't show notification
### Why I don't get data notification when I'm sending hybrid notification when app is in background?
I want to figure it out too. Looks like that is how GCM/FCM works. I'm sending 2 notification separately for now. Let me know if you find a better solution