android - "react-native run-android"- 构建成功但出现错误类型 3 错误 : Activity class MainActivity does not exist

Question

我尝试在 Android 模拟器上运行应用程序，但它失败了。我运行 react-native run-android，BUILD 是成功的，但我收到错误类型 3，我没有看到它安装在模拟器上。

这部分是我在 cmd 中运行“react-native run-android”时得到的:

Installed on 1 device.

BUILD SUCCESSFUL

Total time: 2 mins 24.714 secs
Starting the app on ***** (...\Android\sdk/platform-tools/adb -s **** shell am start -n app/.MainActivity)...
Starting: Intent { cmp=app/.MainActivity }
Error type 3
Error: Activity class {app/app.MainActivity} does not exist.

Answer 1

第 1 步:检查以下文件是否具有相同的包名称，例如“com.companyName.appName”:

1. package (usually line 2) in /android/app/src/main/AndroidManifest.xml
2. applicationId (usually line 90) in defaultConfig section of /android/app/build.gradle
3. Line 1 of /android/app/src/main/java/com/paysack/MainApplication.java
4. Line 1 of /android/app/src/main/java/com/paysack/MainActivity.java

第 2 步:

react-native run-android