Read/write to external XML file in Android
Here is the code to write to XML file:
final String xmlFile = "userData";
String userNAme = "username";
String password = "password";
try {
FileOutputStream fos = new FileOutputStream("userData.xml");
FileOutputStream fileos= getApplicationContext().openFileOutput(xmlFile, Context.MODE_PRIVATE);
XmlSerializer xmlSerializer = Xml.newSerializer();
StringWriter writer = new StringWriter();
xmlSerializer.setOutput(writer);
xmlSerializer.startDocument("UTF-8", true);
xmlSerializer.startTag(null, "userData");
xmlSerializer.startTag(null, "userName");
xmlSerializer.text(username_String_Here);
xmlSerializer.endTag(null, "userName");
xmlSerializer.startTag(null,"password");
xmlSerializer.text(password_String);
xmlSerializer.endTag(null, "password");
xmlSerializer.endTag(null, "userData");
xmlSerializer.endDocument();
xmlSerializer.flush();
String dataWrite = writer.toString();
fileos.write(dataWrite.getBytes());
fileos.close();
}
catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
and to read data from XML File the do as below:
final String xmlFile = "userData";
ArrayList<String> userData = new ArrayList<String>();
try {
fis = getApplicationContext().openFileInput(xmlFile);
isr = new InputStreamReader(fis);
inputBuffer = new char[fis.available()];
isr.read(inputBuffer);
data = new String(inputBuffer);
isr.close();
fis.close();
}
catch (FileNotFoundException e3) {
// TODO Auto-generated catch block
e3.printStackTrace();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
XmlPullParserFactory factory = null;
try {
factory = XmlPullParserFactory.newInstance();
}
catch (XmlPullParserException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
factory.setNamespaceAware(true);
XmlPullParser xpp = null;
try {
xpp = factory.newPullParser();
}
catch (XmlPullParserException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
try {
xpp.setInput(new StringReader(data));
}
catch (XmlPullParserException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
int eventType = 0;
try {
eventType = xpp.getEventType();
}
catch (XmlPullParserException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
while (eventType != XmlPullParser.END_DOCUMENT){
if (eventType == XmlPullParser.START_DOCUMENT) {
System.out.println("Start document");
}
else if (eventType == XmlPullParser.START_TAG) {
System.out.println("Start tag "+xpp.getName());
}
else if (eventType == XmlPullParser.END_TAG) {
System.out.println("End tag "+xpp.getName());
}
else if(eventType == XmlPullParser.TEXT) {
userData.add(xpp.getText());
}
try {
eventType = xpp.next();
}
catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
String userName = userData.get(0);
String password = userData.get(1);
To create new file in /storage/sdcard0/your_app_name/ use following:
File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + "your_app_name" + "/" + xmlFile);
file.createNewFile();
FileOutputStream fileos = new FileOutputStream(file);