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update mobileproxy webview android instructions #321

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23 changes: 21 additions & 2 deletions x/mobileproxy/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -551,9 +551,28 @@ Note that this may not fully work on Android, since it will only affect the JVM,

### Web View

We are working on instructions on how use the local proxy in a Webview.
#### Android

On Android, you will likely have to implement [WebViewClient.shouldInterceptRequest](https://developer.android.com/reference/android/webkit/WebViewClient#shouldInterceptRequest(android.webkit.WebView,%20android.webkit.WebResourceRequest)) to fulfill requests using an HTTP client that uses the local proxy.
On Android, you can easily apply a proxy configuration to all the web views in your application with the [`androidx.webview`](https://developer.android.com/reference/androidx/webkit/ProxyController) library like so:

```kotlin
ProxyController.getInstance()
.setProxyOverride(
ProxyConfig.Builder()
.addProxyRule(this.proxy!!.address())
.build(),
{}, // execution context for the following callback - do anything needed here once the proxy is applied, like refreshing web views
{} // callback to be called once the ProxyConfig is applied
)
```

Then you simply inject that client into your activity's WebView like so:

```kotlin
this.webView.webViewClient = MyWebViewClient()
```

#### iOS

As of iOS 17, you can add a proxy configuration to a `WKWebView` via its [`WKWebsiteDataStore` property](https://developer.apple.com/documentation/webkit/wkwebviewconfiguration).

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