应用程序：CompiledBugJavaWithJavaC，react本机应用程序未能编译

我创建了我的第一个react native项目，然后被

npm run eject

弹出，但当我运行

npm run android

时，应用程序无法编译，并给出下面的输出，它在andriod dir中显示出一些错误，但我不知道这个符号导入错误是什么，以及如何修复它。我做了大量的搜索和阅读，但找不到解决问题的方法

我不是java专家，也不知道如何解决这个问题。请帮我解决这个问题，非常感谢

:app:mergeDebugResources UP-TO-DATE
:app:bundleDebugJsAndAssets SKIPPED
:app:processDebugManifest UP-TO-DATE
:app:processDebugResources UP-TO-DATE
:app:generateDebugSources UP-TO-DATE
:app:incrementalDebugJavaCompilationSafeguard UP-TO-DATE
:app:compileDebugJavaWithJavac
:app:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
C:\Users\iClick Digital\Documents\ZerotoMastery\react-app\my-first-project\android\app\src\main\java\com\mynewproject\MainApplication.java:5: error: cannot find symbol
import com.facebook.react.ReactApplication;
                         ^
  symbol:   class ReactApplication
  location: package com.facebook.react
C:\Users\iClick Digital\Documents\ZerotoMastery\react-app\my-first-project\android\app\src\main\java\com\mynewproject\MainApplication.java:6: error: cannot find symbol
import com.facebook.react.ReactNativeHost;
                         ^
  symbol:   class ReactNativeHost
  location: package com.facebook.react
C:\Users\iClick Digital\Documents\ZerotoMastery\react-app\my-first-project\android\app\src\main\java\com\mynewproject\MainApplication.java:14: error: cannot find symbol
public class MainApplication extends Application implements ReactApplication {
                                                            ^
  symbol: class ReactApplication
C:\Users\iClick Digital\Documents\ZerotoMastery\react-app\my-first-project\android\app\src\main\java\com\mynewproject\MainApplication.java:16: error: cannot find symbol
  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
                ^
  symbol:   class ReactNativeHost
  location: class MainApplication
C:\Users\iClick Digital\Documents\ZerotoMastery\react-app\my-first-project\android\app\src\main\java\com\mynewproject\MainApplication.java:36: error: cannot find symbol
  public ReactNativeHost getReactNativeHost() {
         ^
  symbol:   class ReactNativeHost
  location: class MainApplication
C:\Users\iClick Digital\Documents\ZerotoMastery\react-app\my-first-project\android\app\src\main\java\com\mynewproject\MainActivity.java:5: error: MainActivity is not abstract and does not override abstract method getPackages() in ReactActivity
public class MainActivity extends ReactActivity {
       ^
C:\Users\iClick Digital\Documents\ZerotoMastery\react-app\my-first-project\android\app\src\main\java\com\mynewproject\MainApplication.java:16: error: cannot find symbol
  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
                                                       ^
  symbol:   class ReactNativeHost
  location: class MainApplication
C:\Users\iClick Digital\Documents\ZerotoMastery\react-app\my-first-project\android\app\src\main\java\com\mynewproject\MainApplication.java:35: error: method does not override or implement a method from a supertype
  @Override
  ^
8 errors
:app:compileDebugJavaWithJavac FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

---

看看我对这个问题的回答：另外，只是想补充一点——如果你尝试使用cmd

react native run android

，这通常是有效的。