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Android 8: Cleartext HTTP traffic not permitted

I had reports from users with Android 8 that my app (that uses back-end feed) does not show content. After investigation I found following Exception happening on Android 8:

08-29 12:03:11.246 11285-11285/ E/: [12:03:11.245, main]: Exception: IOException java.io.IOException: Cleartext HTTP traffic to * not permitted
at com.android.okhttp.HttpHandler$CleartextURLFilter.checkURLPermitted(HttpHandler.java:115)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:458)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:127)
at com.deiw.android.generic.tasks.AbstractHttpAsyncTask.doConnection(AbstractHttpAsyncTask.java:207)
at com.deiw.android.generic.tasks.AbstractHttpAsyncTask.extendedDoInBackground(AbstractHttpAsyncTask.java:102)
at com.deiw.android.generic.tasks.AbstractAsyncTask.doInBackground(AbstractAsyncTask.java:88)
at android.os.AsyncTask$2.call(AsyncTask.java:333)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)


(I've removed package name, URL and other possible identifiers)

On Android 7 and lower everything works, I do not set android:usesCleartextTraffic in Manifest (and setting it to true does not help, that is the default value anyway), neither do I use Network Security Information. If I call NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted(), it returns false for Android 8, true for older version, using the same apk file. I tried to find some mention of this on Google info about Android O, but without success.
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2 Answers

akshay1995

<application
android:networkSecurityConfig="@xml/network_security_config"
...>

and:

res/xml/network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
<base-config cleartextTrafficPermitted="true">
<trust-anchors>
<certificates src="system" />
</trust-anchors>
</base-config>
</network-security-config>
RoliMishra
In the AndroidManifest I found this parameter:

android:networkSecurityConfig="@xml/network_security_config"


and @xml/network_security_config is defined in network_security_config.xml as:

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
<!--Set application-wide security config using base-config tag.-->
<base-config cleartextTrafficPermitted="false"/>
</network-security-config>

just I changed cleartextTrafficPermitted to true

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