Unable to instantiate UnityPlayerActivity

I've export a project for AndroidStudio with gradle from Unity 2018.3.6f1, as I'm working with my own dynamic library for android and I want to debug it.But I got the error with UnityPlayerActivity in AndroidStudio. Then I created an empty project and export a project for AndroidStudio, and got the same error when debuging it, the stacktrace is below:

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.soulfire.test/com.soulfire.test.UnityPlayerActivity}: java.lang.ClassNotFoundException: Didn't find class "com.soulfire.test.UnityPlayerActivity" on path: DexPathList[[zip file "/data/app/com.soulfire.test-acJrmkvAnnXdgd-9923UmQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.soulfire.test-acJrmkvAnnXdgd-9923UmQ==/lib/arm, /data/app/com.soulfire.test-acJrmkvAnnXdgd-9923UmQ==/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]] at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2876) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3053) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1772) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:197) at android.app.ActivityThread.main(ActivityThread.java:7022) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:515) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:837) Caused by: java.lang.ClassNotFoundException: Didn't find class "com.soulfire.test.UnityPlayerActivity" on path: DexPathList[[zip file "/data/app/com.soulfire.test-acJrmkvAnnXdgd-9923UmQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.soulfire.test-acJrmkvAnnXdgd-9923UmQ==/lib/arm, /data/app/com.soulfire.test-acJrmkvAnnXdgd-9923UmQ==/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125) at java.lang.ClassLoader.loadClass(ClassLoader.java:379) at java.lang.ClassLoader.loadClass(ClassLoader.java:312) at android.app.Instrumentation.newActivity(Instrumentation.java:1175) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2866) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3053)  at android.app.ActivityThread.-wrap11(Unknown Source:0)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1772)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loop(Looper.java:197)  at android.app.ActivityThread.main(ActivityThread.java:7022)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:515)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:837)