microg/GmsCore · error · RuntimeException

No Creator found for " + tClass.getName()

Error message

No Creator found for " + tClass.getName()

What it means

AbstractSafeParcelable.findCreator() locates the generated '<Class>$000Creator' class by naming convention and reflection. When the generated creator class is missing or cannot be instantiated it throws a RuntimeException 'No Creator found for <class>'. This microG-specific mechanism requires codegen output that the official Play services library does not produce.

Source

Thrown at play-services-basement/src/main/java/com/google/android/gms/common/internal/safeparcel/AbstractSafeParcelable.java:21

 * SPDX-License-Identifier: Apache-2.0
 */

package com.google.android.gms.common.internal.safeparcel;

public abstract class AbstractSafeParcelable implements SafeParcelable {

    @SuppressWarnings("unchecked")
    public static <T extends AbstractSafeParcelable> SafeParcelableCreatorAndWriter<T> findCreator(java.lang.Class<T> tClass) {
        java.lang.Class<?> upmostClass = tClass;
        while (upmostClass.getEnclosingClass() != null) upmostClass = upmostClass.getEnclosingClass();
        String upmostClassName = upmostClass.getName();
        int idx = upmostClassName.lastIndexOf('.');
        String packagePrefix = idx > 0 ? upmostClassName.substring(0, idx + 1) : "";
        String creatorClassName = packagePrefix + tClass.getSimpleName() + "$000Creator";
        try {
            return (SafeParcelableCreatorAndWriter<T>) java.lang.Class.forName(creatorClassName).newInstance();
        } catch (Exception e) {
            throw new RuntimeException("No Creator found for " + tClass.getName(), e);
        }
    }

    @Override
    public int describeContents() {
        return 0;
    }

}

View on GitHub (pinned to 157c9d86ac)

Solutions

1. Ensure the corresponding generated <Class>$000Creator class exists on the classpath
2. Exclude safeparcel classes from ProGuard/R8 obfuscation (keep rules)
3. Use the matching microG/safeparcel runtime for the parcelable classes in use
4. Check that the class's package structure was not moved after generation

Example fix

// proguard-rules.pro
// before
(nothing)
// after
-keep class * extends com.google.android.gms.common.internal.safeparcel.AbstractSafeParcelable { *; }
-keep class **$000Creator { *; }

String pkg = tClass.getPackage().getName();
try {
    Class.forName(pkg + "." + tClass.getSimpleName() + "$000Creator");
} catch (ClassNotFoundException e) { /* creator missing */ }

try { creator = AbstractSafeParcelable.findCreator(cls); } catch (RuntimeException e) { logMissingCreator(e); }

When it happens

Trigger: Deserializing/writing a SafeParcelable subclass whose generated $000Creator class is not on the classpath or whose class name/package does not match the convention (e.g. obfuscated class names, class loaded from a different package).

Common situations: Mixing official Google Play services classes with microG's AbstractSafeParcelable (or vice versa); ProGuard/R8 stripping or renaming generated creator classes; class loaded via a different classloader/package after refactoring.

Related errors

• No non-synthetic fields were found
• Could not access the field in remoteBinder.
• Expected size " + expectedSize + " got " + i + " (0x" + Inte
• Expected object header. Got 0x" + Integer.toHexString(header
• No fields were found

AI-assisted analysis of microg/GmsCore@157c9d86ac (2026-09-06). Data as JSON: /api/errors/b602774d083c6f9d. Report an issue: GitHub.