greenrobot
Hongmeng (HarmonyOS) crashes during registration
Update: to avoid this exception use a workaround.
Edit: updated to translate to English, as this issue tracker is in English.
鸿蒙系统注册时崩溃 Translation: Hongmeng system crashes during registration
崩溃执行的代码为 EventBus.getDefault().register(this) 在注册的时候就崩溃了。崩溃的日志如下：
Translation: The code executed by the crash is EventBus.getDefault().register(this) and it crashes when registering. The crash log is as follows:
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.window.BackEvent" on path: DexPathList[[zip file "/data/app/~~mItMJVtTKf3MFXkmzjJT5g==/com.qeebike.customer-sqio0Z6TRT4C2KWW30Nl8g==/base.apk"],nativeLibraryDirectories=[/data/app/~~mItMJVtTKf3MFXkmzjJT5g==/com.qeebike.customer-sqio0Z6TRT4C2KWW30Nl8g==/lib/arm64, /data/app/~~mItMJVtTKf3MFXkmzjJT5g==/com.qeebike.customer-sqio0Z6TRT4C2KWW30Nl8g==/base.apk!/lib/arm64-v8a, /system/lib64, /hw_product/lib64, /system/lib64/module/multimedia, /system/product/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:218)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at java.lang.reflect.Executable.getParameterTypesInternal(Native Method)
at java.lang.reflect.Method.getParameterTypes(Method.java:186)
at org.greenrobot.eventbus.SubscriberMethodFinder.findUsingReflectionInSingleClass(SubscriberMethodFinder.java:173)
at org.greenrobot.eventbus.SubscriberMethodFinder.findUsingInfo(SubscriberMethodFinder.java:88)
at org.greenrobot.eventbus.SubscriberMethodFinder.findSubscriberMethods(SubscriberMethodFinder.java:64)
at org.greenrobot.eventbus.EventBus.register(EventBus.java:150)
at com.qeebike.map.ui.activity.JourneyFinishActivity.onCreate(JourneyFinishActivity.kt:102)
at android.app.Activity.performCreate(Activity.java:8592)
at android.app.Activity.performCreate(Activity.java:8565)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1344)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4756)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:5006)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:123)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:3082)
at android.os.Handler.dispatchMessage(Handler.java:117)
at android.os.Looper.loopOnce(Looper.java:205)
at android.os.Looper.loop(Looper.java:293)
at android.app.ActivityThread.loopProcess(ActivityThread.java:9986)
at android.app.ActivityThread.main(ActivityThread.java:9975)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:586)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1240)
我的鸿蒙也出现了 Caused by: java.lang.ClassNotFoundException: Didn't find class "android.window.BackEvent" on path: DexPathList 机型mate40 系统harmonyos 4.0.0
There are multiple issues about this, do none of the solutions there work?
Thank you for your replay. YES, I don't find any solution to fix this bug in the ISSUES. THE error message is: Didn't find class "android.window.BackEvent". There is no same issues.
WHAT information about this bug do you want, I can offer?
My CODE as follow:
class JourneyFinishActivity : FlutterActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
if (!EventBus.getDefault().isRegistered(this) && findBackEvent()) {
EventBus.getDefault().register(this)
}
}
Especially, invoke the EventBus.getDefault().register(this) in the FlutterActivity file, it crashes. I don't know the reason is caused by the flutter activity or not!
I hope this is helpful and I look forward to hearing from you.
Good luck.
Please look at the issues I have linked. They are relevant to your issue which is a ClassNotFoundException. I don't have time to summarize them all here.
增加一个冗余类 临时解决
Translation: Add a redundant class as a temporary solution
class _SplashFlutterActivityEventReceiver(val activity: SplashFlutterActivity) {
fun register() {
if (!EventBus.getDefault().isRegistered(this)) {
EventBus.getDefault().register(this)
}
}
@Subscribe(threadMode = ThreadMode.MAIN)
fun onFlutterEvent(event: FlutterSendEventBean) {
...
}
fun unRegister() {
if (EventBus.getDefault().isRegistered(this)) {
EventBus.getDefault().unregister(this)
}
}
}
open class SplashFlutterActivity : FlutterBoostActivity() {
val _eventReceiver = _SplashFlutterActivityEventReceiver(this)
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
_eventReceiver.register()
...
}
override fun onDestroy() {
super.onDestroy()
_eventReceiver.unRegister()
...
}
I had the same crash in my Flutter activity and temporarily fixed it with @mainlxl 's logic. Thank you!
private void findUsingReflectionInSingleClass(FindState findState) {
Method[] methods;
try {
// This is faster than getMethods, especially when subscribers are fat classes like Activities
methods = findState.clazz.getDeclaredMethods();
} catch (Throwable th) {
// Workaround for java.lang.NoClassDefFoundError, see https://github.com/greenrobot/EventBus/issues/149
try {
methods = findState.clazz.getMethods();
} catch (LinkageError error) { // super class of NoClassDefFoundError to be a bit more broad...
String msg = "Could not inspect methods of " + findState.clazz.getName();
if (ignoreGeneratedIndex) {
msg += ". Please consider using EventBus annotation processor to avoid reflection.";
} else {
msg += ". Please make this class visible to EventBus annotation processor to avoid reflection.";
}
throw new EventBusException(msg, error);
}
findState.skipSuperClasses = true;
}
for (Method method : methods) {
int modifiers = method.getModifiers();
if ((modifiers & Modifier.PUBLIC) != 0 && (modifiers & MODIFIERS_IGNORE) == 0) {
Class<?>[] parameterTypes = method.getParameterTypes();
if (parameterTypes.length == 1) {
Subscribe subscribeAnnotation = method.getAnnotation(Subscribe.class);
if (subscribeAnnotation != null) {
Class<?> eventType = parameterTypes[0];
if (findState.checkAdd(method, eventType)) {
ThreadMode threadMode = subscribeAnnotation.threadMode();
findState.subscriberMethods.add(new SubscriberMethod(method, eventType, threadMode,
subscribeAnnotation.priority(), subscribeAnnotation.sticky()));
}
}
} else if (strictMethodVerification && method.isAnnotationPresent(Subscribe.class)) {
String methodName = method.getDeclaringClass().getName() + "." + method.getName();
throw new EventBusException("@Subscribe method " + methodName +
"must have exactly 1 parameter but has " + parameterTypes.length);
}
} else if (strictMethodVerification && method.isAnnotationPresent(Subscribe.class)) {
String methodName = method.getDeclaringClass().getName() + "." + method.getName();
throw new EventBusException(methodName +
" is a illegal @Subscribe method: must be public, non-static, and non-abstract");
}
}
}
methods里面有个是空的报错 在flutterActivity内用EventBus
Translation: There is an empty error in methods. Use EventBus in flutterActivity.
