How to monitor HTTP (get, post etc) requests that my app is making in android

On non rooted phone you can use android OS proxy and redirect traffic. But some apps doesn't respect it. Makes direct connections. Some tweaking could be done. Use Drony with VPN mode to redirect all traffic to SandroProxy. Here is video how capture then traffic with SandroProxy SandroProxy with Chrome devtools SandroProxy can also capture pcapfiles. Can also make ssl mitm on pcap flow. from SandroProxy support

If you are specifically looking for your app to be capable of recording the HTTP calls. Android Snooper library can be the solution you are looking for.

Charles proxy is a good way.

Others include if app is using singleton network class (which it ideally should), make one function for get and one for post. Call these functions from your classes and use log.d to output data on console. You can track request response or time taken.