Android ClassNotFoundException: Didn't find class on path dexpath unity plugin

Question

I am creating a unity plugin in android studio. However I am stuck on this particular exception.

The problem does not occur when I compile and run the project as an application and happens only when it is exported as a library to unity.

Here is the full Log cat of the error

com.livefurnish.livefurnish E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.livefurnish.livefurnish, PID: 28640
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.livefurnish.livefurnish/com.livefurnish.livefurnish.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.livefurnish.livefurnish.MainActivity" on path: DexPathList[[zip file "/data/app/com.livefurnish.livefurnish-2/base.apk"],nativeLibraryDirectories=[/data/app/com.livefurnish.livefurnish-2/lib/arm, /system/fake-libs, /data/app/com.livefurnish.livefurnish-2/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]]
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2567)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
    at android.app.ActivityThread.-wrap12(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6126)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.livefurnish.livefurnish.MainActivity" on path: DexPathList[[zip file "/data/app/com.livefurnish.livefurnish-2/base.apk"],nativeLibraryDirectories=[/data/app/com.livefurnish.livefurnish-2/lib/arm, /system/fake-libs, /data/app/com.livefurnish.livefurnish-2/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1079)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2557)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
    at android.app.ActivityThread.-wrap12(ActivityThread.java) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:154) 
    at android.app.ActivityThread.main(ActivityThread.java:6126) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 
Suppressed: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/common/api/GoogleApiClient$OnConnectionFailedListener;
    at java.lang.VMClassLoader.findLoadedClass(Native Method)
    at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:742)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:362)
            ... 12 more
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.common.api.GoogleApiClient$OnConnectionFailedListener" on path: DexPathList[[zip file "/data/app/com.livefurnish.livefurnish-2/base.apk"],nativeLibraryDirectories=[/data/app/com.livefurnish.livefurnish-2/lib/arm, /system/fake-libs, /data/app/com.livefurnish.livefurnish-2/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
            ... 15 more

And here is the custom manifest that I am using for the plugin in unity:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.livefurnish.livefurnish"  android:versionName="1.0" android:versionCode="1">
<uses-sdk android:minSdkVersion="19" />
    <application android:label="@string/app_name">
        <activity android:name=".MainActivity"
                     android:label="@string/app_name">
             <intent-filter>
                  <action android:name="android.intent.action.MAIN" />
                  <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
        </activity>
    </application>
</manifest>

I found and tried many solutions for this on the internet, However none of them addresses the case when the application is compiled as a unity plugin.

score 2 · Answer 1 · answered Aug 01 '17 at 09:47

2

The Unity cannot import all the imported library in your gradle file. So you need to copy .jar file in Plugin folder in your Unity Project

answered Aug 01 '17 at 09:47

Evan Ngo

254
4
15

so does this mean that I cannot import dependency via grade, I have to insert the aar files into my plugin/android folder? – Oto-Obong Eshiett Jun 11 '20 at 08:46

Android ClassNotFoundException: Didn't find class on path dexpath unity plugin

1 Answers1