Step 1: Create a Proxy Configuration in Your App Code

01. Go to the Code Section of Your App:

02. Write the Proxy Code:

Explanation:

Step 2: Apply the Proxy to Network Requests

03. Get the ConnectivityManager:

Kotlin


import android.net.ConnectivityManager
import android.content.Context
import android.net.NetworkCapabilities
import android.net.NetworkRequest

// Get the ConnectivityManager
val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

// Create a network request to set the proxy
val networkRequest = NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.setNetworkSpecifier(proxy)
.build()

// Apply the network request
connectivityManager.requestNetwork(networkRequest, object : ConnectivityManager.NetworkCallback() {
override fun onAvailable(network: Network) {
super.onAvailable(network)
// Network is now using the proxy settings
}
})

What This Does:

This part of the code attaches the proxy settings to your app’s network requests. It tells the app to use the proxy whenever it’s connected to WiFi (you can change this to other network types if needed).

Here, you might think about what Kotlin is. It’s a new programming language. It works on the Java Virtual Machine (JVM). People use it to build Android apps.

Kotlin is easy to use. It helps you write shorter, clearer code. It also prevents mistakes like null pointer errors. For Android apps, Kotlin is the best choice. It makes coding faster and works well with Android features.

Step 3: Apply Proxy Settings to HTTP Clients (If You’re Using Them)

If you’re using a specific HTTP client library, such as OkHttp or HttpURLConnection, to manage internet requests in your app, here’s how to set up the proxy.

Using OkHttp

• Code:

Using HttpURLConnection

• Code:

Setting up the proxy in your HTTP clients ensures that each request sent through these clients will go through the proxy server.

Step 4: Add Proxy Authentication (If Required)

Some proxy servers need a username and password to allow access.

Here’s how to add those to your configuration.

With OkHttp:

• Code:

• Replace "yourUsername" and "yourPassword" with the credentials your proxy provider gave you.

• This setup will authenticate each request through the proxy.

Step 5: Update Proxy Settings on Network Changes (Optional)

If your app needs to adjust proxy settings when the network changes (for example, when switching from WiFi to mobile data), you can set up a listener for network changes.

01. Use BroadcastReceiver for Network Changes:

• Code:

Kotlin


import android.content.BroadcastReceiver
import android.content.Intent
import android.content.IntentFilter
import android.net.ConnectivityManager

val networkReceiver = object : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
// Reapply or update the proxy settings
}
}

// Register the receiver in onCreate() or your preferred location
val intentFilter = IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION) context.registerReceiver(networkReceiver, intentFilter)

Step 6: Test Your Proxy Setup

Testing is essential to ensure that network requests are being sent through the proxy server.

01. Log Your Network Requests:

Add log statements to your app’s network requests. Check if requests go through the IP address and port of your proxy.

02. Monitor Traffic:

Use monitoring tools like Charles Proxy or Wireshark to inspect network traffic and see if it routes through the proxy server.

03. Perform Simple Requests:

Try making simple requests (like loading a test website) to ensure traffic flows as expected through the proxy server.

Step 7: Troubleshoot Common Issues

You can check out this video guide to learn how to configure a proxy in Android Studio.