NoClassDefFoundError com.facebook.react.bridge.WritableNativeMap

I am randomly getting a crash when trying to load a jsbundle (offline react app)

mReactInstanceManager = ReactInstanceManager.builder().setApplication(mActivity.getApplication()) .setJSBundleFile(appPath) .addPackage(mReactPackage).addPackage(new MyCustomReactPackage()) .setUseDeveloperSupport(false)//For performance use false .setInitialLifecycleState(LifecycleState.RESUMED) .setNativeModuleCallExceptionHandler(new NativeModuleCallExceptionHandler() {        @Override        public void handleException(Exception e) {             e.printStackTrace();             Logger.e(TAG,"Exception while opening app "+ Log.getStackTraceString(e));        }        }) .build(); reactRootView.startReactApplication(mReactInstanceManager, launchClassName, initialProps);   

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Stacktrace:

LOCATION com.facebook.react.JSCConfig$1.a() EXCEPTION java.lang.NoClassDefFoundError MESSAGE com.facebook.react.bridge.WritableNativeMap at com.facebook.react.JSCConfig$1.a()(null:14)     at com.facebook.react.ReactInstanceManager.k()(null:359)     at com.facebook.react.ReactInstanceManager.j()(null:353)     at com.facebook.react.ReactInstanceManager.c()(null:295)     at com.facebook.react.ReactRootView.a()(null:221)     at com.example.sdk.uidesign.fragments.AppFragment.b()(null:215)     at com.example.sdk.uidesign.ActivityV2.a()(null:1265)     at com.example.sdk.uidesign.adapter.AppsAdapter.a()(null:102)     at com.example.sdk.uidesign.adapter.AppsAdapter.a()(null:37)     at com.example.sdk.uidesign.a.e$a$1.onClick()(null:135)     at android.view.View.performClick()(View.java:4790)     at android.view.View$PerformClick.run()(View.java:19883)     at android.os.Handler.handleCallback()(Handler.java:739)     at android.os.Handler.dispatchMessage()(Handler.java:95)     at android.os.Looper.loop()(Looper.java:135)     at android.app.ActivityThread.main()(ActivityThread.java:5268)     at java.lang.reflect.Method.invoke()(Method.java:-2)     at java.lang.reflect.Method.invoke()(Method.java:372)     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run()(ZygoteInit.java:902)     at com.android.internal.os.ZygoteInit.main()(ZygoteInit.java:697) 

Any help would be appreciated.

1 Answers

Answers 1

Android 5.1 has an arbitrary limit of 100 dex files

Here what we can see in runtime/dex_file.cc

bool DexFile::OpenFromZip(...) {     ...     while (i < 100) {         std::string name = StringPrintf("classes%zu.dex", i)         ...     }     ... } 

So if you have more than 100 dex files you get this NoClassDefFoundError.

It is possible to avoid this error by disabling pre-dexing

One possible workaround is to disable preDexLibraries which reduces the number of classes.dex files included in an apk.

Add

android {     dexOptions {         preDexLibraries false     } } 

to the app's build.gradle file

java.lang.NoClassDefFoundError when running app with Android 5.1 with Android Studio 2.2RC

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