Briefly, I am a student learning JAVA/Android development. While following the course, an error keeps on coming up but I can't seem to find the issue.
keep getting this error:
05-04 12:50:18.569 6836-6836/com.lucianvibez.flashchatnewfirebase E/AndroidRuntime: FATAL EXCEPTION: main Process: com.lucianvibez.flashchatnewfirebase, PID: 6836 java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.lucianvibez.flashchatnewfirebase/com.online.lucianvibez.flashchatnewfirebase.LoginActivity}: java.lang.ClassNotFoundException: Didn't find class "com.online.lucianvibez.flashchatnewfirebase.LoginActivity" on path: DexPathList[[zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/base.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.lucianvibez.flashchatnewfirebase-1/lib/x86, /system/lib, /vendor/lib]] at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2548) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) at android.app.ActivityThread.-wrap12(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) Caused by: java.lang.ClassNotFoundException: Didn't find class "com.online.lucianvibez.flashchatnewfirebase.LoginActivity" on path: DexPathList[[zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/base.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.lucianvibez.flashchatnewfirebase-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.lucianvibez.flashchatnewfirebase-1/lib/x86, /system/lib, /vendor/lib]] This is the app module build.gradle file below:
apply plugin: 'com.android.application' android { compileSdkVersion 27 defaultConfig { applicationId "com.lucianvibez.flashchatnewfirebase" minSdkVersion 16 targetSdkVersion 27 versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) testImplementation 'junit:junit:4.12' implementation 'com.android.support:appcompat-v7:27.0.2' implementation 'com.android.support:design:27.0.2' implementation 'com.google.firebase:firebase-core:15.0.0' implementation 'com.google.firebase:firebase-database:15.0.1' implementation 'com.google.firebase:firebase-auth:15.1.0' } apply plugin: 'com.google.gms.google-services' 
