Error: Activity class MainActivity does not exist

I’m integration React Native with an existing android project. When I run the project(react-native-cli run-android --no-packager), there is an error: Activity class MainActivity does not exist. However, my android project should start with an activity named HomeActivity instead of MainActivity. Sorry for my bad English. The error for a rookie is very difficult. Thank you!

Is this a bug report?

(write your answer here) Yes

Have you read the Contributing Guidelines?

(Write your answer here.) Yes

Environment

Environment: OS: macOS High Sierra 10.13.3 Node: 9.3.0 Yarn: 1.3.2 npm: 5.6.0 Watchman: 4.9.0 Xcode: Xcode 9.2 Build version 9C40b Android Studio: 3.0 AI-171.4443003

Packages: (wanted => installed) react: 16.0.0 => 16.0.0 react-native: 0.51.0 => 0.51.0

Steps to Reproduce

(Write your steps here:)

1.init a react native project with react-native init yourprojectname 2.run npm install 3.go to folder /yourprojectname/android/app/src/main/java/com/yourprojectname/ 4.rename MainActivity.java to HomeActivity.java 5.open HomeActivity.java, change class name from MainActivity to HomeActivity 6.go to folder /yourprojectname/android/app/src/main 7.open AndroidManifest.xml, change activity from MainActivity to HomeActivity 8.run react-native run-android

Expected Behavior

(Write what you thought would happen.) app install to android device

Actual Behavior

(Write what happened. Add screenshots!) an error will jump out error: Activity class MainActivity does not exist.

Reproducible Demo

(Paste the link to an example project and exact instructions to reproduce the issue.) https://drive.google.com/file/d/1L1mMgb-IV185v52HznFNqLINwvlGIPsf/view?usp=sharing it’s a zip file, please extract it.

[dccmmtop]

I am back , I resolve the problem ,hahaha.

adb uninstall “package name”

[HHuiHao]

ApplicationId is consistent with the package name, or delete it.

android/app/build.gradle
defaultConfig {
      applicationId "xxx" 
}