How to fix 'Cleartext HTTP traffic to x not permitted'

Question

I'm trying to make a post request to an http server, but when I try to get an input stream I get the error java.io.IOException: Cleartext HTTP traffic to x not permitted

I've already tried putting android:usesCleartextTraffic="true" in my manifest, as well as making a network security config and setting the android:targetSandboxVersion to 1

app/src/main/res/xml/network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">Server adress</domain>
    </domain-config>
</network-security-config>

app/src/main/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.packagename"
    android:targetSandboxVersion="1">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        android:usesCleartextTraffic="true"
        android:networkSecurityConfig="@xml/network_security_config"
        >
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

Logcat output

D/NetworkSecurityConfig: Using Network Security Config from resource network_security_config debugBuild: true
W/System.err: java.io.IOException: Cleartext HTTP traffic to x not permitted
W/System.err:     at com.android.okhttp.HttpHandler$CleartextURLFilter.checkURLPermitted(HttpHandler.java:124) 
W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:462)
W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:411)
W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:248)

Any help would be appreciated

Answer 1

Try using just

android:usesCleartextTraffic="true"

delete this 2

android:targetSandboxVersion="1"
android:networkSecurityConfig="@xml/network_security_config"

mine is working in any API just using android:usesCleartextTraffic="true"

Answer 2

Don't do like this way it may be get run time error To Do easiest method; go to android native project here you can see Properties click there then take AssemblyInfo.cs file then edit this part below

[assembly: Application(UsesCleartextTraffic = true)]

example below my code:-

 using System.Reflection;
    using System.Runtime.CompilerServices;

    using System.Runtime.InteropServices;

    using Android.App;

    // General Information about an assembly is controlled through the following 
    // set of attributes. Change these attribute values to modify the information
    // associated with an assembly.
    [assembly: AssemblyTitle("ZATWEBO.Android")]
    [assembly: AssemblyDescription("")]
    [assembly: AssemblyConfiguration("")]
    [assembly: AssemblyCompany("")]
    [assembly: AssemblyProduct("ZATWEBO.Android")]
    [assembly: AssemblyCopyright("Copyright ©  2014")]
    [assembly: AssemblyTrademark("")]
    [assembly: AssemblyCulture("")]
    [assembly: ComVisible(false)]

    // Version information for an assembly consists of the following four values:
    //
    //      Major Version
    //      Minor Version 
    //      Build Number
    //      Revision
    //
    // You can specify all the values or you can default the Build and Revision Numbers 
    // by using the '*' as shown below:
    // [assembly: AssemblyVersion("1.0.*")]
    [assembly: AssemblyVersion("1.0.0.0")]
    [assembly: AssemblyFileVersion("1.0.0.0")]

    // Add some common permissions, these can be removed if not needed
    [assembly: UsesPermission(Android.Manifest.Permission.Internet)]
    [assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]
    [assembly: Application(UsesCleartextTraffic = true)]

Note: this change only need android 9 Pie or higher versions

Answer 3

Create a file in your project

res/xml/security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">Your URL(ex: 127.0.0.1)</domain>
    </domain-config>
</network-security-config>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest ...>
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        ...
        android:networkSecurityConfig="@xml/security_config"
        ...>
        ...
    </application>
</manifest>

Also if you have android:targetSandboxVersion in then reduce it to 1