ClassNotFoundException (AppCompatActivity.class) after moving Android studio project from Windows to Mac

Question

:)

I'm currently working on an Android app using Android Studio and after I have worked on it quite a while on my Windows machine, I am currently trying to get it running on my MacBook Air.

I copied the project files and created an Emulator on the Mac (API 25). The project compiles just fine, but it immediately crashes on the Emulator due to the following error:

FATAL EXCEPTION: main
                                                                       Process: com.lennartschoch.partytime, PID: 5736
                                                                       java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.lennartschoch.partytime/com.lennartschoch.partytime.LoadingActivity}: java.lang.ClassNotFoundException: Didn't find class "com.lennartschoch.partytime.LoadingActivity" on path: DexPathList[[zip file "/data/app/com.lennartschoch.partytime-2/base.apk", zip file "/data/app/com.lennartschoch.partytime-2/split_lib_slice_3_apk.apk"],nativeLibraryDirectories=[/data/app/com.lennartschoch.partytime-2/lib/x86, /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$H.handleMessage(ActivityThread.java:1477)
                                                                           at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                           at android.os.Looper.loop(Looper.java:154)
                                                                           at android.app.ActivityThread.main(ActivityThread.java:6119)
                                                                           at java.lang.reflect.Method.invoke(Native Method)
                                                                           at com.android.internal.os.ZygoteInit$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.lennartschoch.partytime.LoadingActivity" on path: DexPathList[[zip file "/data/app/com.lennartschoch.partytime-2/base.apk", zip file "/data/app/com.lennartschoch.partytime-2/split_lib_slice_3_apk.apk"],nativeLibraryDirectories=[/data/app/com.lennartschoch.partytime-2/lib/x86, /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:1078)
                                                                           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$H.handleMessage(ActivityThread.java:1477) 
                                                                           at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                           at android.os.Looper.loop(Looper.java:154) 
                                                                           at android.app.ActivityThread.main(ActivityThread.java:6119) 
                                                                           at java.lang.reflect.Method.invoke(Native Method) 
                                                                           at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                                                                           at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 
                                                                        Suppressed: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/app/AppCompatActivity;
                                                                           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 "android.support.v7.app.AppCompatActivity" on path: DexPathList[[zip file "/data/app/com.lennartschoch.partytime-2/base.apk", zip file "/data/app/com.lennartschoch.partytime-2/split_lib_slice_3_apk.apk"],nativeLibraryDirectories=[/data/app/com.lennartschoch.partytime-2/lib/x86, /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

I have (hopefully) currectly implemented the Android Support Library (v7) which you can see in my build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.3"
    defaultConfig {
        applicationId "com.lennartschoch.partytime"
        minSdkVersion 19
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner         "android.support.test.runner.AndroidJUnitRunner"
    }
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:design:25.3.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.android.support:support-v4:25.3.1'
    compile 'com.android.support:recyclerview-v7:25.3.1'
    compile 'com.android.support:cardview-v7:25.3.1'
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:25.3.1'
}

I've already tried cleaning and rebuilding the project but I just cannot get rid of the problem. Any suggestions?

Thanks!

http://stackoverflow.com/questions/22399572/java-lang-classnotfoundexception-didnt-find-class-on-path-dexpathlist — Pavya, May 10 '17 at 13:19

score 1 · Accepted Answer · edited May 10 '17 at 13:22

1

dependencies {   

 compile fileTree(include: ['*.jar'], dir: 'libs')

       compile 'com.android.support:appcompat-v7:25.0.1'
        compile 'com.android.support:recyclerview-v7:25.0.1'
        compile 'com.android.support:cardview-v7:25.0.1'
        compile 'com.android.support:design:25.0.1'

       }

Use these dependencies.

edited May 10 '17 at 13:22

OneCricketeer

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answered May 10 '17 at 13:21

PRATEEK BHARDWAJ

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Keep the versions the same – OneCricketeer May 10 '17 at 13:23
@cricket_007 worked like a charme! Thanks a lot :) Do you know why version 25.3.1 seems to cause these issues only on Mac, but not on Windows? – Lennart Schoch May 10 '17 at 13:31
@Lenn No idea.. I always have used the latest versions on my mac – OneCricketeer May 10 '17 at 13:33

score 0 · Answer 2 · answered Sep 18 '17 at 05:39

I had the same issue after moving an Android project to a subdirectory of the old directory. First, when I tried to run the project on the same device as earlier I got the following error:

DELETE_FAILED_INTERNAL_ERROR
Error while Installing APKs

I got rid of this by doing Build -> Clean Project, but then I was getting these ClassNotFound exceptions and the app was immediately crashing. This was solved by running gradlew clean in terminal in the project root directory and building again.

ClassNotFoundException (AppCompatActivity.class) after moving Android studio project from Windows to Mac

2 Answers2