模拟器屏幕卡在从 10.0.0.2:8081 加载。可能是什么问题？

Question

我正在尝试运行在 android 模拟器中创建一个简单的入门应用程序，它显示的内容如下：

我不确定，我哪里错了。以下是我到达此处所遵循的步骤：

react-native init HelloWorld
如上图所示设置 AVD
react-native 运行-android

就是这样。这是命令 react-native run-android:

的输出

Scanning folders for symlinks in /home/suhail/test/react-native/HelloWorld/node_modules (10ms)
JS server already running.
Building and installing the app on the device (cd android && ./gradlew installDebug)...

> Configure project :app 
WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html

> Task :app:installDebug 
Installing APK 'app-debug.apk' on 'Nexus_Phone(AVD) - 6.0' for app:debug
Installed on 1 device.


BUILD SUCCESSFUL in 1m 48s
28 actionable tasks: 1 executed, 27 up-to-date
Running /home/suhail/Android/Sdk/platform-tools/adb -s emulator-5554 reverse tcp:8081 tcp:8081
Starting the app on emulator-5554 (/home/suhail/Android/Sdk/platform-tools/adb -s emulator-5554 shell am start -n com.helloworld/com.helloworld.MainActivity)...
Starting: Intent { cmp=com.helloworld/.MainActivity }

没有显示任何错误信息。那有什么我想念的吗？

Answer 1

我终于能够使用@Nguyen 的回答和其他一些步骤解决问题。以下是我遵循的步骤：

在模拟器上按 ctrl+m (Linux) 并打开开发者菜单。
选择调试服务器和端口并将值设置为localhost:8081
mkdir android/app/src/main/assets
react-native bundle --platform android --dev false --entry-file index.js --bundle-output android/app/src/main/assets/index.android.bundle --assets -dest android/app/src/main/res
react-native 运行-android
在另一个终端我也使用 npm start

当运行执行命令4时，我得到一个错误说watchman-crawl-failed，可以参考

解决

Answer 2

echo 256 | sudo tee -a /proc/sys/fs/inotify/max_user_instances
echo 32768 | sudo tee -a /proc/sys/fs/inotify/max_queued_events
echo 65536 | sudo tee -a /proc/sys/fs/inotify/max_user_watches
pkill node

模拟器屏幕卡在从 10.0.0.2:8081 加载。可能是什么问题？

Emulator screen stuck at loading from 10.0.0.2:8081. What could be the issue?

android

avd

react-native

react-native-android