android listview预加载动画,Android:预加载列表活动

private class PrepareAdapter1 extends AsyncTask {

ProgressDialog dialog;

@Override

protected void onPreExecute() {

dialog = new ProgressDialog(viewContacts.this);

dialog.setMessage(getString(R.string.please_wait_while_loading));

dialog.setIndeterminate(true);

dialog.setCancelable(false);

dialog.show();

}

/* (non-Javadoc)

* @see android.os.AsyncTask#doInBackground(Params[])

*/

@Override

protected ContactsListCursorAdapter doInBackground(Void... params) {

cur1 = objItem.getContacts();

startManagingCursor(cur1);

adapter1 = new ContactsListCursorAdapter (viewContacts.this,

R.layout.contact_for_listitem, cur1, new String[] {}, new int[] {});

return adapter1;

}

protected void onPostExecute(ContactsListCursorAdapter result) {

list.setAdapter(result);

dialog.dismiss();

}

}