# react-native-foreground-service
A foreground service performs some operation that is noticeable to the user.
For example, an audio app would use a foreground service to play an audio track.
Foreground services must display a notification.
Foreground services continue running even when the user isn't interacting with the app.
See [the Android official documentation](https://developer.android.com/guide/components/services) for details on the concept.
## Getting started
`$ npm install @voximplant/react-native-foreground-service --save`
### Automatic installation (Android only)
- React Native 0.60+
CLI autolink feature links the module while building the app.
1. Add the FOREGROUND_SERVICE permission to the application's `AndroidManifest.xml`:
```
```
2. Add VIForegroundService as a service to the application's `AndroidManifest.xml`:
```
- React Native <= 0.59
`$ react-native link @voximplant/react-native-foreground-service`
1. Add the FOREGROUND_SERVICE permission to the application's `AndroidManifest.xml`:
```
```
2. Add VIForegroundService as a service to the application's `AndroidManifest.xml`:
```
```
### Manual installation (Android only, React Native <= 0.59)
1. Open up `android/app/src/main/java/[...]/MainActivity.java`
- Add `import com.voximplant.foregroundservice.VIForegroundServicePackage;` to the imports at the top of the file
- Add `new VIForegroundServicePackage()` to the list returned by the `getPackages()` method
2. Append the following lines to `android/settings.gradle`:
```
include ':@voximplant_react-native-foreground-service'
project(':@voximplant_react-native-foreground-service').projectDir = new File(rootProject.projectDir, '../node_modules/@voximplant/react-native-foreground-service/android')
```
3. Insert the following lines inside the dependencies block in `android/app/build.gradle`:
```
implementation project(':@voximplant_react-native-foreground-service')
```
4. Add the FOREGROUND_SERVICE permission to the application's `AndroidManifest.xml`:
```
```
5. Add VIForegroundService as a service to the application's `AndroidManifest.xml`:
```
```
6. For targetSdkVersion Android API >= 31
Add android:exported="true" to the application's `AndroidManifest.xml` activity section
```
<===== Add this line
```
## Demo project
Demo application: [react-native-foreground-service-demo](https://github.com/voximplant/react-native-foreground-service-demo)
## Usage
### Import module
```javascript
import VIForegroundService from '@voximplant/react-native-foreground-service';
```
### Create notification channel (Android 8+)
Since the foreground service must display a notification, for Android 8+ it is required to create a notification
channel first:
```javascript
const channelConfig = {
id: 'channelId',
name: 'Channel name',
description: 'Channel description',
enableVibration: false
};
VIForegroundService.createNotificationChannel(channelConfig);
```
### Start foreground service
```javascript
async startForegroundService() {
const notificationConfig = {
channelId: 'channelId',
id: 3456,
title: 'Title',
text: 'Some text',
icon: 'ic_icon',
button: 'Some text',
};
try {
await VIForegroundService.startService(notificationConfig);
} catch (e) {
console.error(e);
}
}
```
### Stop foreground service
```javascript
VIForegroundService.stopService();
```
## Reference
### Methods
```javascript
async startService(notificationConfig)
```
Starts the foreground service and displays a notification with the defined configuration
------------------------------
```javascript
async stopService()
```
Stops the foreground service
------------------------------
```javascript
async createNotificationChannel(channelConfig)
```
Creates a notification channel for the foreground service.
For Android 8+ the notification channel should be created before starting the foreground service
------------------------------
```javascript
on(event, handler)
```
Adds a `handler` to be invoked when a button on the notification is pressed.
Supported event: `VIForegroundServiceButtonPressed`.
------------------------------
```javascript
off(event, handler)
```
Removes the registered `handler` for the `VIForegroundServiceButtonPressed` event.
If `handler` is not provided, this function will remove all registered handlers.
### Configs
```javascript
NotificationChannelConfig
```
| Property name | Description | Required |
|-----------------|-----------------------------------------------------------------------------------------------------------------------|----------|
| id | Unique channel id | yes |
| name | Notification channel name | yes |
| description | Notification channel description | no |
| importance | Notification channel importance. One of:- 1 – 'min'
- 2 – 'low' (by default)
- 3 – 'default'
- 4 – 'high'
- 5 – 'max'
| no |
| enableVibration | Sets whether notification posted to this channel should vibrate. False by default. | no |
```javascript
NotificationConfig
```
| Property name | Description | Required |
|---------------|---------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------|
| channelId | Notification channel id to display the notification | yes (Android 8+ only) |
| id | Unique notification id | yes |
| title | Notification title | yes |
| text | Notification text | yes |
| icon | Icon name | yes |
| button | Button text | no |
| priority | Priority of this notification. One of: - 0 – PRIORITY_DEFAULT (by default)
- -1 – PRIORITY_LOW
- -2 – PRIORITY_MIN
- 1 – PRIORITY_HIGH
- 2 – PRIORITY_MAX
| no |