Unable to find explicit activity class {com.example.myapp/com.apptreesoftware.flutterwebview.WebViewActivity}

[RaulMarquezInclan]

I'm getting this error on flutterWebView.launch:

PlatformException (PlatformException(error, Unable to find explicit activity class {com.example.myapp/com.apptreesoftware.flutterwebview.WebViewActivity}; have you declared this activity in your AndroidManifest.xml?, null))

Flutter doctor:

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 1.20.2, on Microsoft Windows [Version 10.0.19041.450], locale en-US)
 
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[√] Android Studio (version 3.6)
[√] VS Code (version 1.48.2)
[√] Connected device (1 available)

• No issues found!

[√] Flutter (Channel stable, 1.20.2, on Microsoft Windows [Version 10.0.19041.450], locale en-US)
    • Flutter version 1.20.2 at C:\SDK\FlutterSDK\flutter
    • Framework revision bbfbf1770c (2 weeks ago), 2020-08-13 08:33:09 -0700
    • Engine revision 9d5b21729f
    • Dart version 2.9.1

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3) 
    • Android SDK at C:\Users\y_cha\AppData\Local\Android\sdk
    • Platform android-30, build-tools 29.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java       
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)
    • All Android licenses accepted.

[√] Android Studio (version 3.6)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 45.1.1
    • Dart plugin version 192.8052
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)

[√] VS Code (version 1.48.2)
    • VS Code at C:\Users\y_cha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.13.2

[√] Connected device (1 available)
    • AOSP on IA Emulator (mobile) • emulator-5554 • android-x86 • Android 9 (API 28) (emulator)

• No issues found!

Min/Max SDK: 17/29

Please help.

Thanks.

[RaulMarquezInclan]

Anyone?

It this be solve? I still face same problem

Device
Brand:HUAWEI
Model:LIO-AL00
Orientation: Portrait
RAM free: 6.05 GB
Disk free: 45.24 GB

Stack trace
Fatal Exception: java.lang.RuntimeException

Unable to instantiate activity ComponentInfo{my.com.ufresh.mobile/com.apptreesoftware.flutterwebview.WebViewActivity}: java.lang.ClassNotFoundException: Didn't find class "com.apptreesoftware.flutterwebview.WebViewActivity" on path: DexPathList[[zip file "/data/app/my.com.ufresh.mobile-6bHIcwCNqVseCZIbZiTtJA==/base.apk"],nativeLibraryDirectories=[/data/app/my.com.ufresh.mobile-6bHIcwCNqVseCZIbZiTtJA==/lib/arm64, /data/app/my.com.ufresh.mobile-6bHIcwCNqVseCZIbZiTtJA==/base.apk!/lib/arm64-v8a, /system/lib64, /hw_product/lib64, /system/product/lib64]]
android.app.ActivityThread.performLaunchActivity

dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:209)
java.lang.ClassLoader.loadClass (ClassLoader.java:379)
> huawei.android.security.secai.hookcase.hook.ClassLoaderHook.loadClassHook (ClassLoaderHook.java:24)
java.lang.ClassLoader.loadClass (ClassLoader.java:312)
android.app.AppComponentFactory.instantiateActivity (AppComponentFactory.java:95)
androidx.core.app.CoreComponentFactory.instantiateActivity (CoreComponentFactory.java:45)
android.app.Instrumentation.newActivity (Instrumentation.java:1264)
android.app.ActivityThread.performLaunchActivity (ActivityThread.java:3780)
android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:4056)
android.app.servertransaction.LaunchActivityItem.execute (LaunchActivityItem.java:91)
android.app.servertransaction.TransactionExecutor.executeCallbacks (TransactionExecutor.java:149)
android.app.servertransaction.TransactionExecutor.execute (TransactionExecutor.java:103)
android.app.ActivityThread$H.handleMessage (ActivityThread.java:2464)
android.os.Handler.dispatchMessage (Handler.java:110)
android.os.Looper.loop (Looper.java:219)
android.app.ActivityThread.main (ActivityThread.java:8299)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:513)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1052)