I want to send text message from laptop or other tab and show them as big text on my tab, here's an illustration:
I can only think of some chat application but some that I know need internet connection and I can't make it show with bigger font.
Another option is using remote desktop so my tab will remote my laptop, and when I type something on my laptop, for example using notepad, I can also see it in my tab. I tried TeamViewer and it's perfect, but I still need internet connection.
Is there any software that can do this without internet connection?
adb shell am start -a "android.intent.action.SEND" --es "android.intent.extra.TEXT" "Hello World" -t "text/plain"
For "big and colorful" you could enhance that with HTML. Not sure how this pops up; usually, the purpose of ACTION_SEND is to send something to someone else – so it might well open an "app-choser" to ask whether to send by SMS, mail, whatever. I might find something more suitable, if ADB is a way you'd accept :)