how to save the xml tag result when we click on the save button?

hi all i have xml code like below

<root>
<key>
<Question>Is the color of the car</Question>
<Ans>black?</Ans>
</key>
<key>
<Question>Is the color of the car</Question>
<Ans>black?</Ans>
</key>
<key>
<Question>Is the news paper </Question>
<Ans>wallstreet?</Ans>
</key>
<key>
<Question>fragrance odor</Question>
<Ans>Lavendor?</Ans>
</key>
<key>
<Question>Is the baggage collector available</Question>
<Ans></Ans>
</key>
</root>

Display on the screen as:

List form Is the color of the car black? Check box Is the baggage collector available? Check box

if the check box is checked - Yes o开发者_运维知识库therwise vlaue is no. on save button: we need to save it into a xml file

here i am getting question with answer when i am checked but my problem is how to save checked list items into the xml file after click on the save button so give me the solution any one of you.

---

You may refer to the [Creating XML] section in [Working with XML on Android] at http://www.ibm.com/developerworks/opensource/library/x-android/index.html. Once you have the XML generated, you can save it to a file with the help of File and Stream classes.