When android returns to the network, access to the local server is invalid, access to the Internet is valid, but the browser can access the local server solution

The reason for this is that most of the time when the server is set up it is not specifically set to HTTPS mode and newer Versions of Android (Q and above) will not allow HTTP access by default, so we need to change 1 by adding configuration. Start by creating a configuration XML file

      
<network-security-config>
    <base-config cleartextTrafficPermitted="true" />
</network-security-config>
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This file is then configured in the Application tag in androidmanifest.xml

 android:networkSecurityConfig="@xml/network_security_config"
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As is shown in



Then recompile and run it