asLody/VirtualApp · error · IllegalArgumentException

connection is null

Error message

connection is null

What it means

ServiceConnectionDelegate.getDelegate() wraps an app's ServiceConnection into an IServiceConnection binder stub. A null ServiceConnection cannot be dispatched to, so the method throws IllegalArgumentException before any binder work is attempted.

Solutions

1. Always pass a real ServiceConnection instance when binding a service
2. Construct the ServiceConnection before calling bindService, not inside its callback
3. Null-check your connection variable at the call site

Example fix

// before
ServiceConnection conn = null; context.bindService(intent, conn, flags);
// after
ServiceConnection conn = new ServiceConnection() {
    @Override public void onServiceConnected(ComponentName n, IBinder s) { }
    @Override public void onServiceDisconnected(ComponentName n) { }
};
context.bindService(intent, conn, flags);

if (connection == null) throw new IllegalStateException("ServiceConnection must be created before bindService");

try { bindService(intent, conn, flags); } catch (IllegalArgumentException e) { Log.e(TAG, "null connection", e); }

When it happens

Trigger: Calling bindService (in the VA environment) with a null ServiceConnection parameter, which forwards null into getDelegate().

Common situations: Variable holding the connection not yet assigned (race with async init); caller mistakenly passing null to 'unbind-like' reuse of the helper; refactored code dropping the connection argument.

Related errors

• Initializer = NULL
• Not supported in system context
• accountType is null
• response is null
• accountType is null

AI-assisted analysis of asLody/VirtualApp@666fefcb5d (2026-09-09). Data as JSON: /api/errors/2bb6ed62157fe5a0. Report an issue: GitHub.

Appendix: source

Thrown at VirtualApp/lib/src/main/java/com/lody/virtual/client/hook/secondary/ServiceConnectionDelegate.java:38

import mirror.android.app.IServiceConnectionO;
import mirror.android.app.LoadedApk;

/**
 * @author Lody
 */

public class ServiceConnectionDelegate extends IServiceConnection.Stub {
    private final static ArrayMap<IBinder, ServiceConnectionDelegate> DELEGATE_MAP = new ArrayMap<>();
    private IServiceConnection mConn;

    private ServiceConnectionDelegate(IServiceConnection mConn) {
        this.mConn = mConn;
    }

    public static IServiceConnection getDelegate(Context context, ServiceConnection connection,int flags) {
        IServiceConnection sd = null;
        if (connection == null) {
            throw new IllegalArgumentException("connection is null");
        }
        try {
            Object activityThread = ActivityThread.currentActivityThread.call();
            Object loadApk = ContextImpl.mPackageInfo.get(VirtualCore.get().getContext());
            Handler handler = ActivityThread.getHandler.call(activityThread);
            sd = LoadedApk.getServiceDispatcher.call(loadApk, connection, context, handler, flags);
        } catch (Exception e) {
            Log.e("ConnectionDelegate", "getServiceDispatcher", e);
        }
        if (sd == null) {
            throw new RuntimeException("Not supported in system context");
        }
        return getDelegate(sd);
    }

    public static IServiceConnection removeDelegate(Context context, ServiceConnection conn) {
        IServiceConnection connection = null;
        try{

View on GitHub (pinned to 666fefcb5d)