你好我有这个代码（粘贴在下面），它读取并显示电话联系人ListView。除此之外，它还应该具有更多功能，即它应该能够在将联系人读取到 xml 文件时将其写入。我想将该 xml 存储在我的 SD 卡中。请检查下面的代码。
public class ContactsListActivity extends Activity implements
OnItemClickListener
{
private ListView listView;
private List<ContactBean> list = new ArrayList<ContactBean>();
XmlSerializer serializer = Xml.newSerializer();
File newxmlfile = new File(Environment.getExternalStorageDirectory()+"/new.xml");
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_contacts);
listView = (ListView) findViewById(R.id.list);
listView.setOnItemClickListener(this);
try{
newxmlfile.createNewFile();
}catch(IOException e){
Log.e("IOException", "exception in createNewFile() method");
}
//we have to bind the new file with a FileOutputStream
FileOutputStream fileos = null;
try{
fileos = new FileOutputStream(newxmlfile);
}catch(FileNotFoundException e){
Log.e("FileNotFoundException", "can't create FileOutputStream");
}
Cursor phones = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null,
null, null);
//we set the FileOutputStream as output for the serializer, using UTF-8 encoding
try {
serializer.setOutput(fileos, "UTF-8");
//Write <?xml declaration with encoding (if encoding not null) and standalone flag (if standalone not null)
serializer.startDocument(null, Boolean.valueOf(true));
} catch (IllegalArgumentException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IllegalStateException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
while (phones.moveToNext()) {
String name = phones
.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones
.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
ContactBean objContact = new ContactBean();
objContact.setName(name);
objContact.setPhoneNo(phoneNumber);
list.add(objContact);
//create a new file called "new.xml" in the SD card
//we create a XmlSerializer in order to write xml data
try {
//set indentation option
// serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true);
//start a tag called "root"
serializer.startTag(null, name);
//i indent code just to have a view similar to xml-tree
serializer.startTag(null, "name");
serializer.text(name);
serializer.endTag(null, "name");
serializer.startTag(null, "phonenumber");
serializer.text(phoneNumber);
serializer.endTag(null, "phonenumber");
serializer.endTag(null, name);
//write xml data into the FileOutputStream
serializer.flush();
//finally we close the file stream
fileos.close();
} catch (Exception e) {
Log.e("Exception","error occurred while creating xml file");
}
try {
//write xml data into the FileOutputStream
// serializer.flush();
//finally we close the file stream
// fileos.close();
serializer.endDocument();
} 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();
}
}
phones.close();
ContactAdapter objAdapter = new ContactAdapter(
ContactsListActivity.this, R.layout.alluser_row, list);
listView.setAdapter(objAdapter);
if (null != list && list.size() != 0) {
Collections.sort(list, new Comparator<ContactBean>() {
@Override
public int compare(ContactBean lhs, ContactBean rhs) {
return lhs.getName().compareTo(rhs.getName());
}
});
AlertDialog alert = new AlertDialog.Builder(
ContactsListActivity.this).create();
alert.setTitle("");
alert.setMessage(list.size() + " Contact Found!!!");
alert.setButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alert.show();
} else {
showToast("No Contact Found!!!");
}
}
private void showToast(String msg) {
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
}
@Override
public void onItemClick(AdapterView<?> listview, View v, int position,
long id) {
ContactBean bean = (ContactBean) listview.getItemAtPosition(position);
showCallDialog(bean.getName(), bean.getPhoneNo());
}
@SuppressWarnings("deprecation")
private void showCallDialog(String name, final String phoneNo) {
AlertDialog alert = new AlertDialog.Builder(ContactsListActivity.this)
.create();
alert.setTitle("Call?");
alert.setMessage("Are you sure want to call " + name + " ?");
alert.setButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alert.setButton2("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String phoneNumber = "tel:" + phoneNo;
Intent intent = new Intent(Intent.ACTION_CALL, Uri
.parse(phoneNumber));
startActivity(intent);
}
});
alert.show();
}
}
我从互联网上得到了这段代码，它有一个缺陷。只有最后一个读取的联系人被添加到我的 sd 卡上的 xml 文件中。当我调试代码时，它显示正确遍历代码和所有联系人。
我想将所有读取的联系人添加到正在存储的 xml 文件中。非常感谢此代码中的任何帮助或更正。提前致谢。