adb.exe: error: closed when i run the react native app

Question

我是 React Native 的新手，所以我做的第一件事就是通过运行ning 安装 React Native npm install -g react-native-cli 在运行ning react-native info 之后我明白了

C:\Users\husam\WebstormProjects\calculator>react-native info
info Fetching system and libraries information...
System:
    OS: Windows 10 10.0.18363
    CPU: (4) x64 Intel(R) Core(TM) i3-7020U CPU @ 2.30GHz
    Memory: 815.06 MB / 3.92 GB
  Binaries:
    Node: 12.16.1 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.1 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 6.14.4 - C:\Program Files\nodejs\npm.CMD
    Watchman: Not Found
  SDKs:
    Android SDK:
      API Levels: 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 7, 8, 9
      Build Tools: 19.1.0, 28.0.3, 29.0.3
      System Images: android-19 | Intel x86 Atom, android-29 | Google Play Intel x86 Atom
      Android NDK: Not Found
  IDEs:
    Android Studio: Version  3.6.0.0 AI-192.7142.36.36.6308749
  Languages:
    Java: 1.8.0_231
    Python: 3.7.6
  npmPackages:
    @react-native-community/cli: Not Found
    react: 16.11.0 => 16.11.0
    react-native: 0.62.2 => 0.62.2
  npmGlobalPackages:
    *react-native*: Not Found

之后我从这里用 webstorm 创建了一个新项目 [https://www.jetbrains.com/help/webstorm/react-native.html ] 之后我以 19 API 级别启动模拟器然后我运行 App.js 文件，我得到这个

"C:\Program Files\nodejs\node.exe" C:\Users\husam\AppData\Roaming\npm\node_modules\react-native-cli run-android
info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 960 file(s) to forward-jetify. Using 4 workers...
info JS server already running.
info Installing the app...
> Task :app:generatePackageList
> Task :app:preBuild
> Task :app:preDebugBuild
> Task :app:compileDebugAidl NO-SOURCE
> Task :app:checkDebugManifest UP-TO-DATE
> Task :app:compileDebugRenderscript NO-SOURCE
> Task :app:generateDebugBuildConfig UP-TO-DATE
> Task :app:javaPreCompileDebug UP-TO-DATE
> Task :app:mainApkListPersistenceDebug UP-TO-DATE
> Task :app:bundleDebugJsAndAssets SKIPPED
> Task :app:generateDebugResValues UP-TO-DATE
> Task :app:generateDebugResources UP-TO-DATE
> Task :app:mergeDebugResources UP-TO-DATE
> Task :app:createDebugCompatibleScreenManifests UP-TO-DATE
> Task :app:processDebugManifest UP-TO-DATE
> Task :app:processDebugResources UP-TO-DATE
> Task :app:compileDebugJavaWithJavac UP-TO-DATE
> Task :app:mergeDebugShaders UP-TO-DATE
> Task :app:compileDebugShaders UP-TO-DATE
> Task :app:generateDebugAssets UP-TO-DATE
> Task :app:mergeDebugAssets UP-TO-DATE
> Task :app:copyDebugBundledJs SKIPPED
> Task :app:processDebugJavaRes NO-SOURCE
> Task :app:mergeDebugJavaResource UP-TO-DATE
> Task :app:checkDebugDuplicateClasses UP-TO-DATE
> Task :app:desugarDebugFileDependencies UP-TO-DATE
> Task :app:transformClassesWithDexBuilderForDebug UP-TO-DATE
> Task :app:validateSigningDebug UP-TO-DATE
> Task :app:signingConfigWriterDebug UP-TO-DATE
> Task :app:mergeExtDexDebug UP-TO-DATE
> Task :app:mergeDexDebug UP-TO-DATE
> Task :app:mergeDebugJniLibFolders UP-TO-DATE
> Task :app:mergeDebugNativeLibs UP-TO-DATE
> Task :app:stripDebugDebugSymbols UP-TO-DATE
> Task :app:packageDebug UP-TO-DATE

> Task :app:installDebug
10:21:40 V/ddms: execute: running am get-config
10:21:45 V/ddms: execute 'am get-config' on 'emulator-5554' : EOF hit. Read: -1
10:21:45 V/ddms: execute: returning
Installing APK 'app-debug.apk' on 'MY_phone(AVD) - 4.4.2' for app:debug
10:21:45 D/app-debug.apk: Uploading app-debug.apk onto device 'emulator-5554'
10:21:45 D/Device: Uploading file onto device 'emulator-5554'
10:21:45 D/ddms: Reading file permision of C:\Users\husam\WebstormProjects\calculator\android\app\build\outputs\apk\debug\app-debug.apk as: rwx------
10:21:49 V/ddms: execute: running pm install -r -t "/data/local/tmp/app-debug.apk"
10:22:25 V/ddms: execute 'pm install -r -t "/data/local/tmp/app-debug.apk"' on 'emulator-5554' : EOF hit. Read: -1
10:22:25 V/ddms: execute: returning
10:22:25 V/ddms: execute: running rm "/data/local/tmp/app-debug.apk"
10:22:26 V/ddms: execute 'rm "/data/local/tmp/app-debug.apk"' on 'emulator-5554' : EOF hit. Read: -1
10:22:26 V/ddms: execute: returning
Installed on 1 device.

Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.0.1/userguide/command_line_interface.html#sec:command_line_warnings

BUILD SUCCESSFUL in 4m 49s
27 actionable tasks: 2 executed, 25 up-to-date
info Connecting to the development server...
adb.exe: error: closed
info Starting the app on "emulator-5554"...
warn Failed to connect to development server using "adb reverse": Command failed: C:\Users\husam\AppData\Local\Android\Sdk/platform-tools/adb -s emulator-5554 reverse tcp:8081 tcp:8081
WARNING: linker: libdvm.so has text relocations. This is wasting memory and is a security risk. Please fix.
Starting: Intent { cmp=com.calculator/.MainActivity }

日志中显示的错误与 adb 有关，但我可以使用 adb 命令在模拟器和真实设备中安装和获取 logcat，没有任何错误

在互联网上搜索后，我尝试运行这两个命令 adb reconnect adb reverse tcp:8081 tcp:8081 但我得到与以下相同的错误

C:\Users\husam\WebstormProjects\calculator>adb reconnect
reconnecting 4203605bb24a3200 [device]


C:\Users\husam\WebstormProjects\calculator>adb reverse tcp:8081 tcp:8081
adb.exe: error: closed

我运行默认的代码是react native创建的该应用程序也已成功安装在我的模拟器上，但是当我运行它时，我得到了一个错误告诉我应用程序将停止我还注意到当我启动模拟器时它给了我这个错误

Answer 1

在 React-Native 文档中，提到最好删除 react-native-cli，因为它会导致一些问题。

我也遇到了同样的问题，把模拟器的API从19改成29就解决了，原来是API版本的问题。但还要确保你运行 >npm install.

另外，模拟器我用的是genymotion，建议大家使用，打开模拟器。并打开两个终端，在第一个终端中输入 >react-native start 在另一个终端输入 >npx react-native 运行-android。此外，请确保您的端口没有任何问题。

希望对您有所帮助。

adb.exe: error: closed when i run the react native app

adb.exe: error: closed when i run the react native app

javascript

android

adb

webstorm

react-native