12fre3

public class MainActivity extends Activity {

    final String DIR_SD = "MyFiles";
    final String FILENAME_SD = "fileSD.xml";

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void onclick(View v) throws Exception {
        switch (v.getId()) {
            case R.id.btnWriteSD:
                writeFileSD();
				break;
        }
    }

    void writeFileSD() throws Exception {

        DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = builderFactory.newDocumentBuilder();
        Document document = builder.newDocument();
        Element element = document.createElement("тест");
        document.appendChild(element);

        DOMSource domSource = new DOMSource(document);
        TransformerFactory tFactory = TransformerFactory.newInstance();

        File sdPath = Environment.getExternalStorageDirectory();
        sdPath = new File(sdPath.getAbsolutePath() + "/" + DIR_SD);
        sdPath.mkdirs();
        File sdFile = new File(sdPath, FILENAME_SD);

          BufferedWriter bw = new BufferedWriter(new FileWriter(sdFile));
            Transformer transformer = tFactory.newTransformer();
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            transformer.transform(domSource, new StreamResult(bw));

    }
}