仍然面对网络错误

Question

我在AndroidManifest.xml中添加了以下内容，但仍然遇到网络错误

android:usesCleartextTraffic="true"

我现在缺少的任何东西，下面是我的系统配置。

System:
    OS: Linux 4.4 Ubuntu 16.04.6 LTS (Xenial Xerus)
    CPU: (4) x64 Intel(R) Core(TM) i5 CPU       M 560  @ 2.67GHz
    Memory: 425.18 MB / 7.60 GB
    Shell: 4.3.48 - /bin/bash
  Binaries:
    Node: 12.16.3 - /usr/local/bin/node
    Yarn: 1.12.3 - /usr/bin/yarn
    npm: 6.14.4 - /usr/local/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  SDKs:
    Android SDK:
      API Levels: 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
      Build Tools: 23.0.1, 24.0.0, 25.0.0, 25.0.1, 25.0.2, 25.0.3, 26.0.1, 26.0.2, 27.0.0, 27.0.3, 28.0.2, 28.0.3
      Android NDK: Not Found
  IDEs:
    Android Studio: 3.2 AI-181.5540.7.32.5056338
  Languages:
    Java: 1.8.0_201 - /usr/bin/javac
    Python: 2.7.12 - /usr/bin/python
  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