Java
Java Android boilerplate with WorkManager built in
For teams that ship Android in Java. ViewBinding for type-safe views, Navigation Component for graph-based routing, WorkManager for reliable background sync, and Room for local persistence. Clerk auth, Supabase with RLS, and BillingClient via Java interop are pre-wired. One purchase, $54, no subscriptions.
WorkManager — background tasks that survive restarts
// WorkManager - background task scheduling
public class SyncWorker extends Worker {
public SyncWorker(
@NonNull Context context,
@NonNull WorkerParameters params
) {
super(context, params);
}
@NonNull
@Override
public Result doWork() {
// Sync user data to Supabase in background
try {
SyncRepository
.syncUserData(getApplicationContext());
return Result.success();
} catch (Exception e) {
return Result.retry();
}
}
}
// Schedule periodic sync
PeriodicWorkRequest syncWork =
new PeriodicWorkRequest.Builder(
SyncWorker.class, 15, TimeUnit.MINUTES)
.setConstraints(new Constraints.Builder()
.setRequiredNetworkType(
NetworkType.CONNECTED)
.build())
.build();
WorkManager.getInstance(context)
.enqueueUniquePeriodicWork(
"user_sync",
ExistingPeriodicWorkPolicy.KEEP,
syncWork);Stack details
Core technologies
What's included
How integrations work in Java
Clerk (clerk-android via Java interop)
Clerk Android SDK callable from Java with BiometricPromptCompat and EncryptedSharedPreferences. Social logins, passkeys, and MFA work with Java callback patterns.
Supabase (kotlin-extensions, Java interop)
Supabase Kotlin extensions accessible from Java via coroutine bridge. Suspend functions exposed as callback-based APIs for Java consumers. RLS scoped to the Clerk user ID.
BillingClient (Java interop)
Google Play Billing Library via Java interop — BillingClient, ProductDetails, and purchase flow all work natively. No third-party wrapper. Server-side receipt verification included.
AI Gateway (OkHttp + Java callbacks)
OkHttp client with Java async callbacks. One API key, automatic provider fallback across Grok, OpenAI, Anthropic, and DeepSeek.
Cost comparison
Building this yourself
$16,800+
Plus 8 to 12 weeks of development time
Beyondkitter
$54
One-time payment, all 5 stacks included
Ready to ship with Java?
Auth, database, and background sync wired up. Configure your keys and go.
Get the Java Kit, $54