运行 flutter 应用程序时出现错误

Question

When I am starting debugging I get this error:

Launching lib\main.dart on ONEPLUS A5000 in debug mode... lib\main.dart:1 E/AndroidRuntime(11211): in writeCrashedAppName, pkgName:com.new.package.azabazar E/AndroidRuntime(11211): FATAL EXCEPTION: main E/AndroidRuntime(11211): Process: com.new.package.azabazar, PID: 11211 E/AndroidRuntime(11211): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.new.package.azabazar/com.example.myapp.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.example.myapp.MainActivity" on path: DexPathList[[zip file "/data/app/com.new.package.azabazar-1/base.apk"],nativeLibraryDirectories=[/data/app/com.new.package.azabaza r-1/lib/x86, /data/app/com.new.package.azabazar-1/base.apk,/lib/x86, /system/lib, /vendor/lib, /data/downloads: /data/priv-downloads]] E/AndroidRuntime(11211). at android.app.ActivityThread.performLaunchActivity(ActivityThread:java:2570) E/AndroidRuntime(11211). at android.app.ActivityThread.handleLaunchActivity(ActivityThread:java:2729) E/AndroidRuntime(11211). at android.app.ActivityThread.-wrap12(ActivityThread:java) E/AndroidRuntime(11211). at android.app.ActivityThread$H.handleMessage(ActivityThread:java:1480) E/AndroidRuntime(11211). at android.os.Handler.dispatchMessage(Handler:java:102) E/AndroidRuntime(11211). at android.os.Looper.loop(Looper:java:154) E/AndroidRuntime(11211). at android.app.ActivityThread.main(ActivityThread:java:6138) E/AndroidRuntime(11211). at java.lang.reflect.Method:invoke(Native Method) E/AndroidRuntime(11211). at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit:java:893) E/AndroidRuntime(11211).at com.android.internal.os.ZygoteInit.main(ZygoteInit:java:783) E/AndroidRuntime(11211): Caused by. java.lang:ClassNotFoundException. Didn't find class "com.example.myapp:MainActivity" on path. DexPathList[[zip file "/data/app/com.new.package.azabazar-1/base,apk"].nativeLibraryDirectories=[/data/app/com.new.package,azabazar-1/lib/x86. /data/app/com.new.package.azabazar-1/base,apk,/lib/x86, /system/lib, /vendor/lib: /data/downloads. /data/priv-downloads]] E/AndroidRuntime(11211). at dalvik.system.BaseDexClassLoader:findClass(BaseDexClassLoader:java.56) E/AndroidRuntime(11211). at java.lang.ClassLoader:loadClass(ClassLoader:java.380) E/AndroidRuntime(11211). at java.lang.ClassLoader:loadClass(ClassLoader:java.312) E/AndroidRuntime(11211). at android.app.Instrumentation:newActivity(Instrumentation:java.1108) E/AndroidRuntime(11211). at android.app.ActivityThread:performLaunchActivity(ActivityThread:java.2560) E/AndroidRuntime(11211). ... 9 more

Answer 1

you should delete

android/
ios/
build/
web/ 

those folders. change package name flutter pub run change_app_package_name:main com.company.azabazar

this might solve your prob:)