我正在用android编写一个简单的xmpp客户端,我在更新contactList时遇到了一个问题。我正在使用一个带有SimpleCursorAdapter的MatrixCursor来做这件事。当prog更新list时,它会启动futureTask的线程。数据没问题,但是list on screen不会刷新,因为(我想)这个futureTask的线程正在等待执行?
当任何联系人更改状态时,从一个监听器调用drawContactList方法。例如,当我将call复制到main时,它工作得很好。
你知道怎么修复它吗?
代码:
static ListView contactList;
static MatrixCursor clCursor;
static SimpleCursorAdapter adapterList;
private final String[] matrixCols = new String[] { "_id", "username", "description", "icon" };
private final String[] menuCols = new String[] {"username", "description", "icon" };
private final int[] toWhatId = new int[] { R.id.clUsername, R.id.clDescription, R.id.clStatusIcon };
...
public void drawContactList(ArrayList<Contact> contacts, Context context) {
clCursor = new MatrixCursor(matrixCols);
startManagingCursor(clCursor);
if(contacts != null){
for (Contact contact : contacts) {
clCursor.addRow(new Object[] { contact.id, contact.name, contact.description, contact.icon });
}
}
adapterList = new SimpleCursorAdapter(getApplicationContext(), R.layout.contactlist, clCursor, menuCols, toWhatId);
//in this line futureTask starts
contactList.setAdapter(adapterList);
}发布于 2011-12-04 02:47:33
我找到了一个解决方案。我正在使用Handler来调用这个方法。它可以完美地工作:)
private Handler contactListHandler = new Handler();
contactListHandler.post(new Runnable() {
public void run() {
System.out.println("Presence changed: " + presence.getFrom() + " " + presence);
drawContactList(xmppConnection.updateContacts(presence), context);
}
});https://stackoverflow.com/questions/8151528
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