Basically, both Android TV and Android have the same code yet there is no way to send file between them which is strange. Anyway, the app a lot of people use and I use personally to send files, mostly apks, from my Android smartphone to the Android TV is Send Files to TV.
It is a super simple application to connect your MiTV Stick, your Android mobile device and your personal computer. It allows you to fast and easily transfer your movies, TV shows, or ANY files between these devices through your local network without any limitation. It runs on Windows, macOS, and Linux, android smartphone, android smart TV system. Files can easily be transferred between machines running different operating systems. All you need is your phone and a Mi TV Stick connected to the same Wi-Fi network. Select the file, Select Send on the phone and Receiveon Mi TV Stick and that’s it the file will be sent
You might be interested: how to install any apk file on your Xiaomi Mi TV Stick
Note that this works fine on the smaller files but I did notice that it kind of slows down at times with larger files. But still for apks and other small files this is a very good one.
This guide will show how to use send files to TV. Make sure your phone and your Mi TV Stick device are connected to the same Wi-Fi network.
The first thing you need to do is to install the app on both your phone and your Mi TV Stick device. It is available on play store
Transfer files from android mobile to Mi TV Stick
Launch the application on your both devices. It will ask your permission to access your local files, press allow
On your mobile select Send and on Mi TV Stick screen select Receive
Then, back to your mobile, select the file you want to transfer to your Mi TV Stick from your local storage
Then Select the device to receive the transfer. Your Mi TV Stick device should appear in the list. If not check if they are connected to the same Wi-Fi.
Once Your Mi TV Stick Selected, the transfer automatically takes place and shows Succeeded once finished
When the transfer is completed, you can open the file directly from the application or any other file manager installed on Mi TV Stick