> For the complete documentation index, see [llms.txt](https://docs.omnitalk.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.omnitalk.io/flutter/developers-guide/pre-requisite.md).

# Pre-requisite

## 1. **앱의 네이티브 권한 설정**

* `android>app>src>main>AndroidManifest.xml`

```jsx
<uses-permission android:name="android.permission.INTERNET" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-feature android:name="android.hardware.audio.output" />
<uses-feature android:name="android.hardware.microphone" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
```

* `ios>Runner>info.plist`

```jsx
<key>NSCameraUsageDescription</key>
<string>$(PRODUCT_NAME) Camera Usage!</string>
<key>NSMicrophoneUsageDescription</key>
<string>$(PRODUCT_NAME) Microphone Usage!</string>
```

* ios>Podfile  (for permission handler [참고](https://github.com/Baseflow/flutter-permission-handler/tree/main/permission_handler))

```

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    # Start of the permission_handler configuration
    target.build_configurations.each do |config|
   
       #  Preprocessor definitions can be found in: https://github.com/Baseflow/flutter-permission-handler/blob/master/permission_handler_apple/ios/Classes/PermissionHandlerEnums.h
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',
  
        
        # dart: PermissionGroup.camera
        'PERMISSION_CAMERA=1',
  
        # dart: PermissionGroup.microphone
        'PERMISSION_MICROPHONE=1',
         
        # dart: PermissionGroup.notification
        'PERMISSION_NOTIFICATIONS=1', 
           
        # dart: PermissionGroup.bluetooth
        'PERMISSION_BLUETOOTH=1',
      ]
  
    end 
    # End of the permission_handler configuration

```

## 2. 패키지 설치

* `pubspec.yaml`

```groovy
omnitalk_sdk: ^2.0.0
flutter_webrtc: ^0.9.34
```

## **3. 최소 지원 사양**

* Flutter >= 3.1.0
* Dart >= 2.19
* Android API >=21
* IOS>= 11

Android와 ios 설정은 다음을 참고하시면 됩니다.

* `android > add > build.gradle`

```
defaultConfig {
   minSdkVersion 21
}
```

* ios > Podfile

```
platform :ios, '11.0'
```

## 4. 앱 개발 공통 사항

### Step 0. SDK 객체 초기화

[콘솔](https://omnitalk.io/console/service/service-id)에서 발급받은 Service Id와 Service Key로 SDK를 초기화 합니다. 해당 정보는 노출되지 않도록 주의하여야 합니다. 초기화된 SDK 객체는 이후 모든 메서드 호출에 사용됩니다.&#x20;

Omnitalk SDK는 싱글톤 패턴으로 제공됩니다. 아래 방법으로 SDK를 초기화시키고 객체를 얻을 수 있습니다.

```dart
import 'package:omnitalk_sdk/omnitalk_sdk.dart';
import 'package:flutter_webrtc/flutter_webrtc.dart';

Omnitalk.sdkInit(
        serviceId: 'Service ID', serviceKey: 'Service KEY');
Omnitalk sdk = Omnitalk.getInstance();
```