Android

Integrate the Human Token Journey into your Android app using Custom Tabs.

Markdown

Custom Tabs launch the Human Token Journey in a browser tab inside your app. When the journey finishes, the browser redirects to your custom URL scheme and your app intercepts it.

Prerequisites

• Android 8 (API 26) or later
• androidx.browser:browser:1.5.0
• A unique URL scheme for your app (e.g. myapp)

Step 1: Add the dependency

In your build.gradle:

implementation("androidx.browser:browser:1.5.0")

Step 2: Define your URL scheme

Choose a unique scheme (e.g. myapp). This is used as the callbackUri when creating the process:

callbackUri: myapp://callback

Step 3: Create the activity

import android.content.Intent
import android.net.Uri
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.browser.customtabs.CustomTabsIntent

class HumanTokenActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val url = intent.getStringExtra(EXTRA_PROCESS_URL) ?: return finish()

        CustomTabsIntent.Builder()
            .build()
            .launchUrl(this, Uri.parse(url))
    }

    override fun onNewIntent(intent: Intent) {
        super.onNewIntent(intent)
        intent.data?.let { uri ->
            if (uri.scheme == "myapp") {
                // Journey completed — send processId to your backend
                val processId = uri.getQueryParameter("id")
                handleResult(processId)
            }
        }
    }

    private fun handleResult(processId: String?) {
        // Fetch the result from your backend via Get Process
        finish()
    }

    companion object {
        const val EXTRA_PROCESS_URL = "process_url"
    }
}

Step 4: Configure AndroidManifest.xml

<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-permission android:name="android.permission.CAMERA" />

<activity
    android:name=".HumanTokenActivity"
    android:launchMode="singleTop"
    android:exported="true">
    <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="myapp" android:host="callback" />
    </intent-filter>
</activity>

singleTop ensures Android calls onNewIntent() on the existing activity instead of creating a new one.

Step 5: Launch the journey

val intent = Intent(this, HumanTokenActivity::class.java)
    .putExtra(HumanTokenActivity.EXTRA_PROCESS_URL, processLink)
startActivity(intent)

File summary

File	Purpose
build.gradle	androidx.browser dependency
HumanTokenActivity.kt	Custom Tabs launch + redirect handling
AndroidManifest.xml	Intent filter for your URL scheme