Android - application isn't working on real device, on virtual device is working (Rest API over http)

Good day,

using the development instructions for android, I launched the RestAPI application with the Volley library in the Android studio.

The application accesses the Rest API website under the local IP address via http like http://192.168.5.22, I don't need https, it's just a development version yet.

I test it via AVD on a virtual machine with API 24 - Nougat - Android 7.0. Everything works there. When I run it on a real phone that has android 9 and another with android 10, it doesn't work - I can't get to the data.

If I use an older phone with android 4.4 kitkat, the application works - I get a data listing via rest api.

I don't know what to do with it, I thought there was a permission issue, but I have it set up correctly in AndroidManifest.xml:

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

Please help, I've been stuck for a few days, I went for it even though I thought I had to deal with a newer android called Runtime permissions, but it looks like the wrong way. Apparently, an android does not have to apply for internet rights - every android application should have it automatically when it is defined in AndroidManifest.xml.

Thanks for the help

REPLY

Hi,

I solved the whole problem with internet access very simply in the end, but the problem was to find a solution.

I added one line to the android manifest:
android:usesCleartextTraffic="true"

And the application works.

What I read, this must be set if the target web server has only the http protocol and not secure https .... It has been introduced since Android 9 ...