Android Question Dual monitors

aeric said:

Why you need to buy it?
Do you have customer yet? If no, i think better don't waste your time on it.
Try what you can afford.

Maybe the more economically way is to develop a second app to install to second tablet (normally cheaper) and the main app in first tablet send the price to the second app through some kind of protocol (eg. Bluetooth, WiFi, MQTT or use timer to pull data from a first tablet database).
I think apps like Loyverse has another "Customer Display" app. No need fancy integration SDK.

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Refer to my background.
I'm a agro chemical saleman. The first time,I was looking to learn coding Windows Mobile app and need to learn English. I love appforge for VB6.0 ,it's easy to learn,but it stopped delvelopping. And then I found Erel's basic4ppc. But,the lastest decided,I selected B4A. I love Erel's products. I hope only to learn them.My business is not used technology. Because I don't have more customers.

Theera said:

Refer to my background.
I'm a agro chemical saleman. The first time,I was looking to learn coding Windows Mobile app and need to learn English. I love appforge for VB6.0 ,it's easy to learn,but it stopped delvelopping. And then I found Erel's basic4ppc. But,the lastest decided,I selected B4A. I love Erel's products. I hope only to learn them.My business is not used technology. Because I don't have more customers.

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It doesn't matter about your background.

It does not make sense to me if you don't have a target or any existing hardware for development.

Why I said you don't need to buy one. I just contacted my local distributor for Sunmi through their Facebook page. I am requesting for a loan unit by telling them I am a software developer that I want to do development. I am waiting for their reply.

If you really want to explore retail POS business, don't hesitate and try look for ways to work with local distributors. I think some will come back to you.

Look, the question is what your goal actually is. It is important to realize that VB solution only works on a Windows PC, while you always talk about Basic 4 Android (B4A) and show a picture that looks very much like a Windows PC.

A low budget solution has already been indicated to use a cheap standard tablet as a second user screen. Of course, you could first start working out your idea as a Proof-Of-Concept (POC). This is possible with a tablet where you temporarily print the screen output on log. If you get stuck with this POC, there's no point in delving into displaying anything on the second screen.

Whatever you should ask yourself whether you only want to show something, or whether you also want the customers to look up something. The answer largely determines the complexity of the solution.

If the POC seems to be successful, you can use your programming experience to see how you can realize a second screen connection. There are two obvious possible solutions for this. The first is to "mottle" a chat solution over WiFi. Chat examples can be found on this forum. Another possibility is to connect two tablets and let them communicate with each other with a "crossed" USB cable. I think the first suggestion is easier to implement

SO TAKE A PIECE OF PAPER AND FIRST WRITE DOWN WHAT YOU WANT TO ACHIEVE, THEN CHOP EVERYTHING INTO SMALL PIECES, THEN THINK HOW YOU CAN POSSIBLY REALIZE THOSE PIECES AND THEN SEARCH FOR EXAMPLES IN THIS FORUM AND WORK THEM OUT.

If you run into a specific programming problem, post your code and your problem on this forum and there will undoubtedly be someone who is able to help you further.

Hello MicroDrie,
Due to my English is badly,so I used google translate your massage,but I try to write respond to you myself. I had never coded 2 monitors before in any platforms. I tried to study how to do in VB6.0 for having the idea.
I'm interested in B4A how to do. I don't know how to extend monitor in android device. I tried to study in youtube and websites. I found only how to make android to be the second monitor of Windows,Mac. I think my this tread should closed because I don't have more information to ask others. Thank you all of you.
Best regards,
Theera

Sometimes I feel frustrated when my messages are being ignored.
What you have asked have been answered.

Theera said:

I tried to study how to do in VB6.0 for having the idea.

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For VB6 solution, as I have written, since it is a desktop windows application, it is easy to do.
You just need to set the Form startup position to x, y point which is on another monitor when the Display settings is set to Extend.
Let say the first monitor have resolution of 1024 pixels wide, then if you set the second form to display with position let say x = 1028 (adding some buffer gap, this is trial and error) then the second form will be appear in the second monitor. You need to adjust the form size accordingly to fit the screen.
My experience with my previous job is that the software was design in such a way and all the shops are using the same hardware, so there will be no compatibility issue. All terminal will be install (clone) from a workable windows image (Ghost).

But why you want to use VB6?
It won't work for Android! You can only try on a PC with 2 VGA or display ports.

Theera said:

I'm interested in B4A how to do. I don't know how to extend monitor in android device.

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In Android OS and hardware, it is a different case.
I have already proposed several solutions.

aeric said:

eg. Bluetooth, WiFi, MQTT or use timer to pull data from a first tablet database

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For me, MQTT is a good solution for 2 Android devices.

I don't know why you ask this question at the first place.
If you are just curious, you get short answers.
If you are serious to get a solution for business purpose, then there are much for discussion.

However, I don't see you are keen and easily give up. Language barrier for me is not an issue at all as we can use translator.

I understand people with low self-esteem or imposter syndrome because I am/were one. I also a shy person and have lack of confidence most of the time.
But if you believe you want to create something, just don't easily give up.
People replied to you because they want to help you.

1. why you want to use VB6?

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I have a little knowleage of VB6.0 before. (Usually,eveyone always starts learning what he has.)

2. others'questions

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I think that what PC can do ,Android should can do as well. Many my cases ,I always use my imagine.

I'm sorry that my English. I can't more explain that.

Theera said:

I think that what PC can do ,Android should can do as well

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You may be right but I disagree.

I can't say anymore.

Here is what I have done to demonstrate what B4A can do. Sorry, I don't feel I want to spoon feed anyone at this moment.

I don't feel I want to spoon feed anyone at this moment.

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Whenever you feel better,I ready to learn your code. Your code really make me hungry to learn.

Theera said:

Whenever you feel better,I ready to learn your code. Your code really make me hungry to learn.

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I have given the direction. Go for MQTT.
It is not easy to understand but it gives a solution so depends on you.

As pointed out by @eric19740521 in a comment in my YouTube video, we can also use UDPSocket.