RicevereNFC_S

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class SchedaNFC extends AppCompatActivity {

    public static final String TAG_LOG = Schede.class.getName();
    public static final int PERMISSION_CODE = 100;
    public static final String CARD_DIR_NAME = "card";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.schede_layout);

        if (Intent.ACTION_VIEW.equals(getIntent().getAction())) {
            if (isStoragePermissionGranted())
                addCard();
        }
    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        setIntent(intent);

        if (Intent.ACTION_VIEW.equals(getIntent().getAction())) {
            if (isStoragePermissionGranted())
                addCard();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == PERMISSION_CODE) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED
                    && grantResults[1] == PackageManager.PERMISSION_GRANTED) {
                addCard();
            }
        }
    }

    private boolean isStoragePermissionGranted() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
                    && checkSelfPermission(android.Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
                return true;
            } else {
                ActivityCompat.requestPermissions(this, new String[]{
                        Manifest.permission.WRITE_EXTERNAL_STORAGE,
                        Manifest.permission.READ_EXTERNAL_STORAGE}, PERMISSION_CODE);
                return false;
            }
        } else { //permission is automatically granted on sdk<23 upon installation
            return true;
        }
    }

    private void addCard() {
        Uri beamUri = getIntent().getData();
        File beamFile = new File(beamUri.getPath());

        File cardDir = new File(getExternalFilesDir(null) + File.separator + CARD_DIR_NAME);
        if (!cardDir.exists()) cardDir.mkdirs();
        String cardName = beamFile.getName();

        File card = new File(cardDir, cardName);

        try {
            byte buff[] = new byte[64];
            int len;
            FileInputStream in = new FileInputStream(beamFile);
            FileOutputStream out = new FileOutputStream(card);

            while ((len = in.read(buff)) > 0) {
                out.write(buff, 0, len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}