14. NFC Technology: Transfer text using Android beam technology

The basic idea of Android beam

The basic idea of Android beam is that two (only two) NFC devices are close (usually back-to-back) and push the data to another NFC device by touching the screen of an NFC device. In the process of passing data, two NFC devices cannot be too far away or the NFC connection will be interrupted.

Android Beam API

The Android SDK provides the following two ways to deliver a message.

Nfcadapter.setndefpushmessage Nfcadapter.setndefpushmessagecallback

public void Setndefpushmessage (Ndefmessage message, activity activity, activity ... activities);

public void Setndefpushmessagecallback (Createndefmessagecallback callback, activity activity, activity ... activities) ;

Public ndefmessage Createndefmessage (Nfcevent event)

Demo