> For the complete documentation index, see [llms.txt](https://partner-docs.covergenius.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://partner-docs.covergenius.com/xcover-journeys/integration/messaging/android.md).

# Android

Send and receive journey events through a WebView bridge on Android.

{% hint style="info" %}
There is no separate native SDK or bridge shipped by Cover Genius for Android. You relay the same JSON envelope described on the main Messaging page through `WebView`'s standard `@JavascriptInterface` mechanism, exactly as you would for any other web content.

This page shows the CG specific envelope and events; for the underlying bridge mechanism itself, see Android's official documentation for [WebView](https://developer.android.com/reference/android/webkit/WebView) and [addJavascriptInterface](https://developer.android.com/reference/android/webkit/WebView#addJavascriptInterface\(java.lang.Object,%20java.lang.String\)).
{% endhint %}

### Prerequisites

The journey is loaded inside a `WebView` with JavaScript enabled (`webView.settings.javaScriptEnabled = true`).

### Receiving events from the journey

Expose a `@JavascriptInterface` bridge object and inject a script that forwards `window.postMessage` calls into it:

```kotlin
class JourneyBridge(private val onEvent: (String, JSONObject) -> Unit) {
    @JavascriptInterface
    fun postMessage(json: String) {
        val data = JSONObject(json)
        if (data.optString("source") != "xcover-journeys") return
        val type = data.optString("type")
        val payload = data.optJSONObject("payload") ?: JSONObject()
        onEvent(type, payload)
    }
}

// Setup
webView.settings.javaScriptEnabled = true
webView.addJavascriptInterface(
    JourneyBridge { type, payload ->
        when (type) {
            "CG_JOURNEY_READY" -> Log.d("XCJ", "Journey mounted and ready")
            "CG_JOURNEY_COMPLETE" -> Log.d(
                "XCJ",
                "Journey finished: ${payload.optString("outcome")} ${payload.optString("policy_id")}"
            )
        }
    },
    "cgJourneyBridge"
)

webView.webViewClient = object : WebViewClient() {
    override fun onPageFinished(view: WebView, url: String) {
        val bridgeScript = """
            window.addEventListener('message', function(event) {
                if (event.data && event.data.source === 'xcover-journeys') {
                    cgJourneyBridge.postMessage(JSON.stringify(event.data));
                }
            });
        """.trimIndent()
        view.evaluateJavascript(bridgeScript, null)
    }
}

webView.loadUrl("https://xcj.xcover.com/acme-travel/en/?country=AU")
```

### Sending events into the journey

Evaluate JavaScript in the web view to dispatch a `message` event the journey's listener picks up:

```kotlin
fun sendToJourney(webView: WebView, type: String, payload: JSONObject = JSONObject()) {
    val js = """
        window.postMessage({ source: 'xcover-journeys', type: '$type', payload: ${payload} }, '*');
    """.trimIndent()
    webView.evaluateJavascript(js, null)
}

// Example: ask the journey to hide itself
sendToJourney(webView, "CG_JOURNEY_HIDE")
```

### Origin and security notes

The journey's own trusted-origin validation is designed for browser `postMessage` traffic (checked against `event.origin`). Inside a native `WebView` bridge, the risk model shifts instead to this: only your app's injected bridge script can call `cgJourneyBridge.postMessage`, and only code running inside the loaded page (the journey itself) can trigger it

Load only the journey URL provided for your integration.

Do not attach this bridge to a web view that can load arbitrary or user-supplied URLs, since `addJavascriptInterface` exposes the bridge to any page the view loads.


---

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