我正在显示所有联系人列表，我已经使用了 AsyncTask 我想显示进度更新对话框，以便用户可以了解剩余的完成时间。我有以下代码但不清楚，如何显示进度更新对话框。
代码
public class MainActivity extends Activity {
/** Called when the activity is first created. */
Cursor cur;
ContentResolver cr;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cr = getContentResolver();
cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null,
null);
GetContact contact = new GetContact();
contact.execute(cur);
}
class GetContact extends AsyncTask<Cursor, Void, Void> {
private ProgressDialog progress;
@Override
protected Void doInBackground(Cursor... params) {
// TODO Auto-generated method stub
System.out.println("value of param==================="
+ params.length);
readContacts();
return null;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
progress = ProgressDialog
.show(MainActivity.this, "", "Loding.....");
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
progress.dismiss();
}
}
public void readContacts() {
// ContentResolver cr = getContentResolver();
// Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null,
// null, null, null);
System.out.println("value of cursor=================================="
+ cur.getCount());
if (cur.getCount() > 0) {
while (cur.moveToNext()) {
String id = cur.getString(cur
.getColumnIndex(ContactsContract.Contacts._ID));
String name = cur
.getString(cur
.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
if (Integer
.parseInt(cur.getString(cur
.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {
System.out
.println("name : ==================================="
+ name + ", ID : " + id);
// get the phone number
Cursor pCur = cr.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID
+ " = ?", new String[] { id }, null);
while (pCur.moveToNext()) {
String phone = pCur
.getString(pCur
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
System.out
.println("phone++++++++++++++++++++++++++++++++++"
+ phone);
}
pCur.close();
// get email and type
Cursor emailCur = cr.query(
ContactsContract.CommonDataKinds.Email.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Email.CONTACT_ID
+ " = ?", new String[] { id }, null);
while (emailCur.moveToNext()) {
// This would allow you get several email addresses
// if the email addresses were stored in an array
String email = emailCur
.getString(emailCur
.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
String emailType = emailCur
.getString(emailCur
.getColumnIndex(ContactsContract.CommonDataKinds.Email.TYPE));
System.out.println("Email " + email + " Email Type : "
+ emailType);
}
emailCur.close();
// Get note.......
String noteWhere = ContactsContract.Data.CONTACT_ID
+ " = ? AND " + ContactsContract.Data.MIMETYPE
+ " = ?";
String[] noteWhereParams = new String[] {
id,
ContactsContract.CommonDataKinds.Note.CONTENT_ITEM_TYPE };
Cursor noteCur = cr.query(
ContactsContract.Data.CONTENT_URI, null, noteWhere,
noteWhereParams, null);
if (noteCur.moveToFirst()) {
String note = noteCur
.getString(noteCur
.getColumnIndex(ContactsContract.CommonDataKinds.Note.NOTE));
System.out.println("Note " + note);
}
noteCur.close();
// Get Postal Address....
String addrWhere = ContactsContract.Data.CONTACT_ID
+ " = ? AND " + ContactsContract.Data.MIMETYPE
+ " = ?";
String[] addrWhereParams = new String[] {
id,
ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_ITEM_TYPE };
Cursor addrCur = cr.query(
ContactsContract.Data.CONTENT_URI, null, null,
null, null);
while (addrCur.moveToNext()) {
String poBox = addrCur
.getString(addrCur
.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.POBOX));
String street = addrCur
.getString(addrCur
.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.STREET));
String city = addrCur
.getString(addrCur
.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.CITY));
String state = addrCur
.getString(addrCur
.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.REGION));
String postalCode = addrCur
.getString(addrCur
.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.POSTCODE));
String country = addrCur
.getString(addrCur
.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.COUNTRY));
String type = addrCur
.getString(addrCur
.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.TYPE));
// Do something with these....
}
addrCur.close();
// Get Instant Messenger.........
String imWhere = ContactsContract.Data.CONTACT_ID
+ " = ? AND " + ContactsContract.Data.MIMETYPE
+ " = ?";
String[] imWhereParams = new String[] {
id,
ContactsContract.CommonDataKinds.Im.CONTENT_ITEM_TYPE };
Cursor imCur = cr.query(ContactsContract.Data.CONTENT_URI,
null, imWhere, imWhereParams, null);
if (imCur.moveToFirst()) {
String imName = imCur
.getString(imCur
.getColumnIndex(ContactsContract.CommonDataKinds.Im.DATA));
String imType;
imType = imCur
.getString(imCur
.getColumnIndex(ContactsContract.CommonDataKinds.Im.TYPE));
}
imCur.close();
// Get Organizations.........
String orgWhere = ContactsContract.Data.CONTACT_ID
+ " = ? AND " + ContactsContract.Data.MIMETYPE
+ " = ?";
String[] orgWhereParams = new String[] {
id,
ContactsContract.CommonDataKinds.Organization.CONTENT_ITEM_TYPE };
Cursor orgCur = cr.query(ContactsContract.Data.CONTENT_URI,
null, orgWhere, orgWhereParams, null);
if (orgCur.moveToFirst()) {
String orgName = orgCur
.getString(orgCur
.getColumnIndex(ContactsContract.CommonDataKinds.Organization.DATA));
String title = orgCur
.getString(orgCur
.getColumnIndex(ContactsContract.CommonDataKinds.Organization.TITLE));
}
orgCur.close();
}
}
}
}
}