XmlHttpRequest post request doesn't work React Native Android App - reactjs

Question

In my application, there is a form that users fill and post soap action. This is a must soap because it's a ministry of healt procedure. XmlHttpRequuest post works fine in iOS devices. But doesn't work on android. I did a lot of research but didn't find anything. I am leaving the codes below.Please help me! Thanks!
const soapAction = async (xml, username, password,) => {//here is the post request func
var xmlhttp = new XMLHttpRequest();
xmlhttp.open(
'POST',
'https://*****************************',
);
xmlhttp.timeout = 10000;
var text=xml.toString('utf16');
var sr=
'<?xml version="1.0" encoding="UTF-8"?>'+
'<soap:Envelope' +
' xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"' +
' xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"' +
' xmlns:xsd="http://www.w3.org/2001/XMLSchema"' +
' xmlns:xs="http://www.w3.org/2001/XMLSchema"' +
' xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing"' +
' xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd"' +
' xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">'+
'<soap:Header>'+
'<wsse:Security>'+
'<wsse:UsernameToken wsu:Id="SecurityToken-04ce24bd-9c7c-4ca9-9764-92c53b0662c5">'+
`<wsse:Username>${username}</wsse:Username>`+
`<wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText">${password}</wsse:Password>`+
'</wsse:UsernameToken>'+
'</wsse:Security>'+
'</soap:Header>'+
'<soap:Body>'+
'<***************************************************">'+
'<input>'+
'<![CDATA[' +
'<?xml version="1.0" encoding="utf-16"?>' +
`${text}`+
']]>'+
'</input>'+
'</**************>'+
'</soap:Body>'+
'</soap:Envelope>';
xmlhttp.setRequestHeader(
'SOAPAction',
'https://*****************************************',
);
xmlhttp.setRequestHeader('Content-Type', 'text/xml; charset=utf-16');
xmlhttp.setRequestHeader("Access-Control-Allow-Origin", "8");
xmlhttp.onload = async function () {
console.log(xmlhttp.responseText);
//alert(xmlhttp.responseText);
if (xmlhttp.responseText.includes("S0000")) {
Alert.alert("Başarılı ", "başarıyla sonuçlandı. ", [
{text: 'Tamam', onPress: () => cancel()},
],
{cancelable: true}
)
} else {
Alert.alert("Hata", "Lütfen Daha Sonra Tekrar Deneyiniz", [
{text: 'Tamam', onPress: () => null},
],
{cancelable: true}
) //it always here because response always null
}
};
xmlhttp.send(sr);
//console.log(xmlhttp);
};
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
//android manifest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.VIBRATE"/>
<queries>
<intent>
<action android:name="android.intent.action.VIEW" />
<data android:mimeType="*/*" />
</intent>
</queries>
<application
android:name=".MainApplication"
android:label="#string/app_name"
android:icon="#mipmap/ic_launcher"
android:roundIcon="#mipmap/ic_launcher_round"
android:usesCleartextTraffic="true"
android:allowBackup="false"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|screenSize|smallestScreenSize|uiMode"
android:launchMode="singleTask"
android:windowSoftInputMode="adjustResize"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>