在不使用互联网的情况下，在两个Android手机之间来回传输文件

Question

I have an application that sends an SMS from one android to another which then processes the information contained in the sms. The problem is that the sms can only carry a small amount of data. I want to transfer larger files (probably no more than 1Mb) between two phones but without using the internet. I am thinking maybe GPRS, in which case can anyone give me some pointers on general coding issues with GPRS I would need to consider in order to do this and to get me started. Or anyone have any other ideas on how to do this?

Edit: Sorry, just to make it clearer, I need to access the mobile via some address such as its phone number to download a file and it could be anywhere, so bluetooth will not work unless it's in the vicinity (right?). Perhaps something like a modem or fax will do it if there is such a thing. I'm amazed this is so difficult to do, seems to be what mobiles were devised to do.

Answer 1

I don't think GPRS would work.

It relies on mobile operator cells spread across (It costs and I think you're not allowed to send arbitrary packets).

Should it work on long distances? If not, bluetooth or WiFi direct would be the option.

Answer 2

如果您正在谈论短距离传输， 近场通信也可能是您解决方案的答案。

Answer 3

Use bluetooth to transfer the file

            Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
        sharingIntent.setType("text/plain");
        sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT,mailBody);//mail body is your content         
        startActivity(Intent.createChooser(sharingIntent,"Share using"));