Add Multi Window support for Samsung devices

[bumper314]

A single meta-data entry is enough to make Termux "Multi Window" aware on supported Samsung devices.
Tested and confirmed working on Samsung Note Pro 12.2 running Android 5.1.1.

This addition should not interfere with Android 6+'s split screen feature.
Tested and confirmed split screen functions as normal on a Nexus 6 running Android 7.0.

This addition should go unnoticed on non-Smasung Android 5 devices.
Tested and confirmed no functionality visible on Nexus 5 running Android 5.1.

[fornwall]

Looks great!

This addition should not interfere with Android 6+'s split screen feature.

I guess this should be Android 7, as that was the version that introduced split screen AFAIK (https://developer.android.com/guide/topics/ui/multi-window.html)?

For my understanding: Does this affect also Samsung devices running Android 7.0 or later (does it change/improve the multiwindow handling on that version, or does Samsung just use the built-in Android multiwindow support as of 7.0+ regardless of the com.sec.android.support.multiwindow meta-data)?

[bumper314]

I guess this should be Android 7, as that was the version that introduced split screen AFAIK

Correct, my mistake.

For my understanding: Does this affect also Samsung devices running Android 7.0 or later (does it change/improve the multiwindow handling on that version, or does Samsung just use the built-in Android multiwindow support as of 7.0+ regardless of the com.sec.android.support.multiwindow meta-data)?

I'm confident that Samsung will choose Android 7's multi-window over their own if both are present: http://developer.samsung.com/galaxy/multiwindow

Does anyone have a Samsung device on Android 7 who can confirm?
Here's an APK http://d.pr/f/w2he6z

[bumper314]

Just tested on two Samsung tablets.

• Android 6 works as expected using Samsung's multi-window support.
• Android 7 works as expected, and appears to use Android 7's native split-screen with some additional feature (like being able to pop up a floating window).

Seems like a fairly safe merge. After that, I'll look into supporting multiple instances (which Samsung's multi window API supports) leveraging this merge request:
#187

[bumper314]

Just noticed this addresses Issue #29

[fornwall]

@bumper314 Thanks a lot - this will be available in a v0.52 update available later today!

[yajo]

Amazing how simple this was! I don't understand why don't everybody add it...
Thanks!