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Android Launch: java.lang.ClassNotFoundException

I have released my game on Android. And I have changed the manifest information as you see below.

But I am getting crashes when people try loading the game saying:

java.lang.ClassNotFoundException in dalvik.system.BaseDexClassLoader.findClass

Also I read in this forum post from Michael Noland about... "but there might be issues with where the activity java file ends up"

I believe I have this issue, but have no idea on how to fix the error or make sure I am using the correct location to find the java file.

Any help would be appreciated, thank you.


I changed:

from... package="com.epicgames.${EXECUTABLE_NAME}"

to... package="com.dreambotstudios.${EXECUTABLE_NAME}"

from... activity android:name="com.epicgames.ue4.GameActivity"

to... activity android:name="com.dreambotstudios.ue4.GameActivity"

from... meta-data android:name="com.epicgames.ue4.GameActivity.DepthBufferPreference" android:value="0"/>

to... meta-data android:name="com.dreambotstudios.ue4.GameActivity.DepthBufferPreference" android:value="0"/>


java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.dreambotstudios.BlitzBoom/com.dreambotstudios.ue4.GameActivity}: java.lang.ClassNotFoundException: Didn't find class "com.dreambotstudios.ue4.GameActivity" on path: DexPathList[[zip file "/data/app/com.dreambotstudios.BlitzBoom-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.dreambotstudios.BlitzBoom-1, /vendor/lib, /system/lib]] at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2231) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2363) at android.app.ActivityThread.access$900(ActivityThread.java:161) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1265) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:157) at android.app.ActivityThread.main(ActivityThread.java:5356) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassNotFoundException: Didn't find class "com.dreambotstudios.ue4.GameActivity" on path: DexPathList[[zip file "/data/app/com.dreambotstudios.BlitzBoom-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.dreambotstudios.BlitzBoom-1, /vendor/lib, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:67) at java.lang.ClassLoader.loadClass(ClassLoader.java:497) at java.lang.ClassLoader.loadClass(ClassLoader.java:457) at android.app.Instrumentation.newActivity(Instrumentation.java:1079) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2222)

Product Version: Not Selected
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asked Nov 14 '14 at 03:14 PM in Packaging & Deployment

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Thank you for your report. We were not able to investigate this on the engine version you reported, but there have been many version changes to UE4 since this question was first posted. With a new version of the Engine comes new fixes and it is possible that this issue has changed or may no longer occur. Due to timetable of when this issue was first posted, we are marking this post as resolved for tracking purposes. If you are still experiencing the issue you reported in the current engine version, then please respond to this message with additional information and we will investigate as soon as possible. If you are experiencing a similar, but different issue at this time, could you please submit a new report for it.

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answered Apr 08 '15 at 09:12 PM

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