NFC技术：使用Android Beam技术传输文件（二）

public class MainActivity extends ActionBarActivity 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.fragment_main);
        mNfcAdapter = mNfcAdapter.getDefaultAdapter(this);
        mPendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
                getClass()), 0);

        // 把资源文件的图片拷到sdcard
        try {
            InputStream isStream = getResources().getAssets().open("icon.png");
            FileOutputStream fos = new FileOutputStream(targetFilename);
            byte[] buffer = new byte[10000];
            int n = isStream.read(buffer);
            fos.write(buffer, 0, n);
            isStream.close();

        } catch (Exception e) {
            // TODO: handle exception
        }
        mNfcAdapter.setBeamPushUrisCallback(this, this);
    }

    @Override
    public Uri[] createBeamUris(NfcEvent arg0) {
        // TODO Auto-generated method stub
        Uri[] uris = new Uri[1];
        Uri uri = Uri.parse("file://" + targetFilename);
        uris[0] = uri;

        return uris;
    }

}