Snapchat

Interface with the Snapchat developer kit. Currently supports the Login Kit, for OAuth authentication with Snapchat, and the Creative Kit, for sharing content from your app to Snapchat.

iOS is currently a work in progress.

Installation

• First, add snapchat as a dependency in your pubspec.yaml file.
• Register an app on the Snapchat developer portal, and get your client ID.
• Also, create a redirect url that looks something like yourapp://snapchat/oauth2.

Android

Edit your project-level build.gradle by adding the snap-kit repository to this block:

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url "https://storage.googleapis.com/snap-kit-build/maven"
        }
    }
}

Edit your app-level build.gradle by adding this to the dependencies block:

implementation([
    'com.snapchat.kit.sdk:creative:1.1.4',
    'com.snapchat.kit.sdk:login:1.1.4',
    'com.snapchat.kit.sdk:core:1.1.4'
])

Edit your AndroidManifest.xml:

• Inside your application tag, add these three fields (inserting your client ID and redirect URL):

<meta-data
    android:name="com.snapchat.kit.sdk.clientId"
    android:value="YOUR_CLIENT_ID" />
<meta-data
    android:name="com.snapchat.kit.sdk.redirectUrl"
    android:value="yourapp://snapchat/oauth2" />
<meta-data
    android:name="com.snapchat.kit.sdk.scopes"
    android:resource="@array/snap_connect_scopes" />

• Also add this activity tag. You'll need to deconstruct your redirect url into the parts scheme://host path:

<activity
    android:name="com.snapchat.kit.sdk.SnapKitActivity"
    android:launchMode="singleTask">

    <intent-filter>
        <action android:name="android.intent.action.VIEW" />

        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />

        <data
            android:scheme="yourapp"
            android:host="snapchat"
            android:path="/oauth2" />
    </intent-filter>

</activity>

• If you want to use the Creative Kit, add this tag:

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="${applicationId}.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths" />
</provider>

Now, create a new file called file_paths.xml inside res/xml with the contents:

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <root-path name="root" path="." />
</paths>

Finally, create a new file called arrays.xml inside res/values with the contents:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="snap_connect_scopes">
        <item>https://auth.snapchat.com/oauth2/api/user.bitmoji.avatar</item>
        <item>https://auth.snapchat.com/oauth2/api/user.display_name</item>
        <item>https://auth.snapchat.com/oauth2/api/user.external_id</item>
    </string-array>
</resources>

iOS

Coming soon.

Usage

// Initialize the plugin before using it
var snapchat = SnapchatPlugin();
await snapchat.init();

// Make sure that the user has Snapchat installed
assert await snapchat.isSnapchatInstalled();

// Use the Login Kit to authenticate the user
SnapchatUser user = await snapchat.login();

// Get the cached user
user = snapchat.loggedInUser;
// If there is a cached user, snapchat.login() will automatically return it

// Share an image to Snapchat
await snapchat.send(
  SnapMediaType.Photo,
  path: '/path/to/image.png', // or jpg
);

// Share a video with a caption on it
await snapchat.send(
  SnapMediaType.Video,
  path: '/path/to/video.mp4',
  caption: 'This text can be edited by the user in the app and will appear on top of the video',
);

// Let the user take a photo/video but put a sticker on it
await snapchat.send(
  SnapMediaType.Live,
  sticker: SnapchatSticker(
    '/path/to/image.png',
    x: 0.5, // Percentage of width/height
    y: 0.5,
    width: 50,
    height: 50,
    rotation: 30 // degrees clockwise
    // x, y, width, height, and rotation are all optional
  ),
);


// Log out
await snapchat.logout();