public void setBeamPushUris(Uri[] uris, Activity activity);

public void setBeamPushUrisCallback(CreateBeamUrisCallback callback, Activity activity);

 import java.io.FileOutputStream;

 import java.io.InputStream;

 import android.app.Activity;

 import android.app.PendingIntent;

 import android.content.Intent;

 import android.net.Uri;

 import android.nfc.NfcAdapter;

 import android.nfc.NfcAdapter.CreateBeamUrisCallback;

 import android.nfc.NfcEvent;

 import android.os.Bundle;

 public class NFCFileActivity extends Activity implements CreateBeamUrisCallback {

     private NfcAdapter mNfcAdapter;

     private PendingIntent mPendingIntent;

     private final String targetFilename = "/sdcard/temp_icon.png";

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_nfcfile);

         /*

          * 下面两个调用将当前aty设为处理Nfc的应用

          */

         mNfcAdapter = mNfcAdapter.getDefaultAdapter(this);

         mPendingIntent = PendingIntent.getActivity(this, , new Intent(this,

                 getClass()), );

         try {

             /*

              * 下面代码是将assets中文件拷贝到"/sdcard/temp_icon.png"

              * 两个nfc设备就是传输的文件就是这张图片

              */

             InputStream is = getResources().getAssets().open("icon.png");

             FileOutputStream fos = new FileOutputStream(targetFilename);

             byte[] buffer = new byte[];

             int n = is.read(buffer);

             fos.write(buffer, , n);

             fos.close();

             is.close();

         } catch (Exception e) {

         }

         /*

          * 注意,本示例是用 实现CreateBeamUrisCallback接口方法传输数据,注意

          */

         mNfcAdapter.setBeamPushUrisCallback(this, this);

     }

     /*

      * CreateBeamUrisCallback接口的回调函数 创建uri数组 uri数组中就是要传输的所有文件

      */

     @Override

     public Uri[] createBeamUris(NfcEvent event) {

         // 第1步,准备uri数组,本例中只传一个文件,所以大小为1,uri数组中就是要传输的所有文件

         Uri[] uris = new Uri[];

         // 第2步,根据要传输的文件的名字,构造一个file://类型的uri

         Uri uri = Uri.parse("file://" + targetFilename);

         // 第3步,赋值uri数组的各元素.

         uris[] = uri;

         return uris;

     }

 }